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2 years agoqapi/parser: remove FIXME comment from _append_body_line
John Snow [Thu, 30 Sep 2021 20:57:08 +0000 (16:57 -0400)]
qapi/parser: remove FIXME comment from _append_body_line

True, we do not check the validity of this symbol -- but we don't check
the validity of definition names during parse, either -- that happens
later, during the expr check. I don't want to introduce a dependency on
expr.py:check_name_str here and introduce a cycle.

Instead, rest assured that a documentation block is required for each
definition. This requirement uses the names of each section to ensure
that we fulfilled this requirement.

e.g., let's say that block-core.json has a comment block for
"Snapshot!Info" by accident. We'll see this error message:

In file included from ../../qapi/block.json:8:
../../qapi/block-core.json: In struct 'SnapshotInfo':
../../qapi/block-core.json:38: documentation comment is for 'Snapshot!Info'

That's a pretty decent error message.

Now, let's say that we actually mangle it twice, identically:

../../qapi/block-core.json: In struct 'Snapshot!Info':
../../qapi/block-core.json:38: struct has an invalid name

That's also pretty decent. If we forget to fix it in both places, we'll
just be back to the first error.

Therefore, let's just drop this FIXME and adjust the error message to
not imply a more thorough check than is actually performed.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20210930205716.1148693-6-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2 years agoqapi: Add spaces after symbol declaration for consistency
John Snow [Thu, 30 Sep 2021 20:57:07 +0000 (16:57 -0400)]
qapi: Add spaces after symbol declaration for consistency

Several QGA definitions omit a blank line after the symbol
declaration. This works OK currently, but it's the only place where we
do this. Adjust it for consistency.

Future commits may wind up enforcing this formatting.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20210930205716.1148693-5-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2 years agoqapi/parser: fix unused check_args_section arguments
John Snow [Thu, 30 Sep 2021 20:57:06 +0000 (16:57 -0400)]
qapi/parser: fix unused check_args_section arguments

Pylint informs us we're not using these arguments. Oops, it's
right. Correct the error message and remove the remaining unused
parameter.

Fix test output now that the error message is improved.

Fixes: e151941d1b
Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20210930205716.1148693-4-jsnow@redhat.com>
[Commit message formatting tweaked]
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2 years agoqapi/gen: use dict.items() to iterate over _modules
John Snow [Thu, 30 Sep 2021 20:57:05 +0000 (16:57 -0400)]
qapi/gen: use dict.items() to iterate over _modules

New pylint warning. I could silence it, but this is the only occurrence
in the entire tree, including everything in iotests/ and python/. Easier
to just change this one instance.

(The warning is emitted in cases where you are fetching the values
anyway, so you may as well just take advantage of the iterator to avoid
redundant lookups.)

Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20210930205716.1148693-3-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2 years agoqapi/pylintrc: ignore 'consider-using-f-string' warning
John Snow [Thu, 30 Sep 2021 20:57:04 +0000 (16:57 -0400)]
qapi/pylintrc: ignore 'consider-using-f-string' warning

Pylint 2.11.x adds this warning. We're not yet ready to pursue that
conversion, so silence it for now.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20210930205716.1148693-2-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2 years agoMerge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging
Richard Henderson [Fri, 1 Oct 2021 17:44:36 +0000 (13:44 -0400)]
Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* -smp cleanpus
* Hyper-V englightenment functionality
* Documentation cleanups

# gpg: Signature made Fri 01 Oct 2021 01:11:00 PM EDT
# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]

* remotes/bonzini/tags/for-upstream: (29 commits)
  docs: reorganize testing.rst
  docs: move gcov section at the end of testing.rst
  docs: reorganize tcg-plugins.rst
  docs: reorganize qgraph.rst
  docs: put "make" information together in build-system.rst
  docs: move notes inside the body of the document
  docs: name included files ".rst.inc"
  i386: Change the default Hyper-V version to match WS2016
  i386: Make Hyper-V version id configurable
  i386: Implement pseudo 'hv-avic' ('hv-apicv') enlightenment
  i386: Move HV_APIC_ACCESS_RECOMMENDED bit setting to hyperv_fill_cpuids()
  i386: Support KVM_CAP_HYPERV_ENFORCE_CPUID
  i386: Support KVM_CAP_ENFORCE_PV_FEATURE_CPUID
  machine: Put all sanity-check in the generic SMP parser
  machine: Use g_autoptr in machine_set_smp
  machine: Move smp_prefer_sockets to struct SMPCompatProps
  machine: Remove smp_parse callback from MachineClass
  machine: Make smp_parse generic enough for all arches
  machine: Tweak the order of topology members in struct CpuTopology
  machine: Use ms instead of global current_machine in sanity-check
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2 years agodocs: reorganize testing.rst
Paolo Bonzini [Tue, 7 Sep 2021 15:21:58 +0000 (17:21 +0200)]
docs: reorganize testing.rst

Clean up the heading levels to use === --- ~~~ ^^^ '''.  Reorganize the
outline for the Avocado part, and always include headings for the
class names.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agodocs: move gcov section at the end of testing.rst
Paolo Bonzini [Wed, 22 Sep 2021 15:06:57 +0000 (17:06 +0200)]
docs: move gcov section at the end of testing.rst

gcov testing applies to all tests, not just make check.  Move it
out of the make check section.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agodocs: reorganize tcg-plugins.rst
Paolo Bonzini [Tue, 7 Sep 2021 15:06:07 +0000 (17:06 +0200)]
docs: reorganize tcg-plugins.rst

Clean up the heading levels to use === --- ~~~, and create a new "writing
plugins" section.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agodocs: reorganize qgraph.rst
Paolo Bonzini [Tue, 7 Sep 2021 14:53:01 +0000 (16:53 +0200)]
docs: reorganize qgraph.rst

Clean up the heading levels to use === --- ~~~, and move the command line
building near to the other execution steps.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agodocs: put "make" information together in build-system.rst
Paolo Bonzini [Tue, 7 Sep 2021 14:25:50 +0000 (16:25 +0200)]
docs: put "make" information together in build-system.rst

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agodocs: move notes inside the body of the document
Paolo Bonzini [Tue, 7 Sep 2021 14:42:18 +0000 (16:42 +0200)]
docs: move notes inside the body of the document

Make all documents start with a heading.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agodocs: name included files ".rst.inc"
Paolo Bonzini [Tue, 7 Sep 2021 14:27:08 +0000 (16:27 +0200)]
docs: name included files ".rst.inc"

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Change the default Hyper-V version to match WS2016
Vitaly Kuznetsov [Thu, 2 Sep 2021 09:35:30 +0000 (11:35 +0200)]
i386: Change the default Hyper-V version to match WS2016

KVM implements some Hyper-V 2016 functions so providing WS2008R2 version
is somewhat incorrect. While generally guests shouldn't care about it
and always check feature bits, it is known that some tools in Windows
actually check version info.

For compatibility reasons make the change for 6.2 machine types only.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210902093530.345756-9-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Make Hyper-V version id configurable
Vitaly Kuznetsov [Thu, 2 Sep 2021 09:35:29 +0000 (11:35 +0200)]
i386: Make Hyper-V version id configurable

Currently, we hardcode Hyper-V version id (CPUID 0x40000002) to
WS2008R2 and it is known that certain tools in Windows check this. It
seems useful to provide some flexibility by making it possible to change
this info at will. CPUID information is defined in TLFS as:

EAX: Build Number
EBX Bits 31-16: Major Version
    Bits 15-0: Minor Version
ECX Service Pack
EDX Bits 31-24: Service Branch
    Bits 23-0: Service Number

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210902093530.345756-8-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Implement pseudo 'hv-avic' ('hv-apicv') enlightenment
Vitaly Kuznetsov [Thu, 2 Sep 2021 09:35:28 +0000 (11:35 +0200)]
i386: Implement pseudo 'hv-avic' ('hv-apicv') enlightenment

The enlightenment allows to use Hyper-V SynIC with hardware APICv/AVIC
enabled. Normally, Hyper-V SynIC disables these hardware features and
suggests the guest to use paravirtualized AutoEOI feature. Linux-4.15
gains support for conditional APICv/AVIC disablement, the feature
stays on until the guest tries to use AutoEOI feature with SynIC. With
'HV_DEPRECATING_AEOI_RECOMMENDED' bit exposed, modern enough Windows/
Hyper-V versions should follow the recommendation and not use the
(unwanted) feature.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210902093530.345756-7-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Move HV_APIC_ACCESS_RECOMMENDED bit setting to hyperv_fill_cpuids()
Vitaly Kuznetsov [Thu, 2 Sep 2021 09:35:27 +0000 (11:35 +0200)]
i386: Move HV_APIC_ACCESS_RECOMMENDED bit setting to hyperv_fill_cpuids()

In preparation to enabling Hyper-V + APICv/AVIC move
HV_APIC_ACCESS_RECOMMENDED setting out of kvm_hyperv_properties[]: the
'real' feature bit for the vAPIC features is HV_APIC_ACCESS_AVAILABLE,
HV_APIC_ACCESS_RECOMMENDED is a recommendation to use the feature which
we may not always want to give.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210902093530.345756-6-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Support KVM_CAP_HYPERV_ENFORCE_CPUID
Vitaly Kuznetsov [Thu, 2 Sep 2021 09:35:26 +0000 (11:35 +0200)]
i386: Support KVM_CAP_HYPERV_ENFORCE_CPUID

By default, KVM allows the guest to use all currently supported Hyper-V
enlightenments when Hyper-V CPUID interface was exposed, regardless of if
some features were not announced in guest visible CPUIDs. hv-enforce-cpuid
feature alters this behavior and only allows the guest to use exposed
Hyper-V enlightenments. The feature is supported by Linux >= 5.14 and is
not enabled by default in QEMU.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210902093530.345756-5-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Support KVM_CAP_ENFORCE_PV_FEATURE_CPUID
Vitaly Kuznetsov [Thu, 2 Sep 2021 09:35:25 +0000 (11:35 +0200)]
i386: Support KVM_CAP_ENFORCE_PV_FEATURE_CPUID

By default, KVM allows the guest to use all currently supported PV features
even when they were not announced in guest visible CPUIDs. Introduce a new
"kvm-pv-enforce-cpuid" flag to limit the supported feature set to the
exposed features. The feature is supported by Linux >= 5.10 and is not
enabled by default in QEMU.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210902093530.345756-4-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomachine: Put all sanity-check in the generic SMP parser
Yanan Wang [Wed, 29 Sep 2021 02:58:15 +0000 (10:58 +0800)]
machine: Put all sanity-check in the generic SMP parser

Put both sanity-check of the input SMP configuration and sanity-check
of the output SMP configuration uniformly in the generic parser. Then
machine_set_smp() will become cleaner, also all the invalid scenarios
can be tested only by calling the parser.

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210929025816.21076-16-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomachine: Use g_autoptr in machine_set_smp
Paolo Bonzini [Fri, 1 Oct 2021 17:04:03 +0000 (19:04 +0200)]
machine: Use g_autoptr in machine_set_smp

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomachine: Move smp_prefer_sockets to struct SMPCompatProps
Yanan Wang [Wed, 29 Sep 2021 02:58:14 +0000 (10:58 +0800)]
machine: Move smp_prefer_sockets to struct SMPCompatProps

Now we have a common structure SMPCompatProps used to store information
about SMP compatibility stuff, so we can also move smp_prefer_sockets
there for cleaner code.

No functional change intended.

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210929025816.21076-15-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomachine: Remove smp_parse callback from MachineClass
Yanan Wang [Wed, 29 Sep 2021 02:58:13 +0000 (10:58 +0800)]
machine: Remove smp_parse callback from MachineClass

Now we have a generic smp parser for all arches, and there will
not be any other arch specific ones, so let's remove the callback
from MachineClass and call the parser directly.

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210929025816.21076-14-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomachine: Make smp_parse generic enough for all arches
Yanan Wang [Wed, 29 Sep 2021 02:58:12 +0000 (10:58 +0800)]
machine: Make smp_parse generic enough for all arches

Currently the only difference between smp_parse and pc_smp_parse
is the support of dies parameter and the related error reporting.
With some arch compat variables like "bool dies_supported", we can
make smp_parse generic enough for all arches and the PC specific
one can be removed.

Making smp_parse() generic enough can reduce code duplication and
ease the code maintenance, and also allows extending the topology
with more arch specific members (e.g., clusters) in the future.

Suggested-by: Andrew Jones <drjones@redhat.com>
Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210929025816.21076-13-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomachine: Tweak the order of topology members in struct CpuTopology
Yanan Wang [Wed, 29 Sep 2021 02:58:11 +0000 (10:58 +0800)]
machine: Tweak the order of topology members in struct CpuTopology

Now that all the possible topology parameters are integrated in struct
CpuTopology, tweak the order of topology members to be "cpus/sockets/
dies/cores/threads/maxcpus" for readability and consistency. We also
tweak the comment by adding explanation of dies parameter.

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210929025816.21076-12-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomachine: Use ms instead of global current_machine in sanity-check
Yanan Wang [Wed, 29 Sep 2021 02:58:10 +0000 (10:58 +0800)]
machine: Use ms instead of global current_machine in sanity-check

In the sanity-check of smp_cpus and max_cpus against mc in function
machine_set_smp(), we are now using ms->smp.max_cpus for the check
but using current_machine->smp.max_cpus in the error message.
Tweak this by uniformly using the local ms.

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210929025816.21076-11-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomachine: Prefer cores over sockets in smp parsing since 6.2
Yanan Wang [Wed, 29 Sep 2021 02:58:09 +0000 (10:58 +0800)]
machine: Prefer cores over sockets in smp parsing since 6.2

In the real SMP hardware topology world, it's much more likely that
we have high cores-per-socket counts and few sockets totally. While
the current preference of sockets over cores in smp parsing results
in a virtual cpu topology with low cores-per-sockets counts and a
large number of sockets, which is just contrary to the real world.

Given that it is better to make the virtual cpu topology be more
reflective of the real world and also for the sake of compatibility,
we start to prefer cores over sockets over threads in smp parsing
since machine type 6.2 for different arches.

In this patch, a boolean "smp_prefer_sockets" is added, and we only
enable the old preference on older machines and enable the new one
since type 6.2 for all arches by using the machine compat mechanism.

Suggested-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210929025816.21076-10-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoqtest/numa-test: Use detailed -smp CLIs in test_def_cpu_split
Yanan Wang [Wed, 29 Sep 2021 02:58:08 +0000 (10:58 +0800)]
qtest/numa-test: Use detailed -smp CLIs in test_def_cpu_split

Since commit 80d7835749 (qemu-options: rewrite help for -smp options),
the preference of sockets/cores in -smp parsing is considered liable
to change, and actually we are going to change it in a coming commit.
So it'll be more stable to use detailed -smp CLIs in the testcases
that have strong dependency on the parsing results.

Currently, test_def_cpu_split use "-smp 8" and will get 8 CPU sockets
based on current parsing rule. But if we change to prefer cores over
sockets we will get one CPU socket with 8 cores, and this testcase
will not get expected numa set by default on x86_64 (Ok on aarch64).

So now explicitly use "-smp 8,sockets=8" to avoid affect from parsing
logic change.

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210929025816.21076-9-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoqtest/numa-test: Use detailed -smp CLIs in pc_dynamic_cpu_cfg
Yanan Wang [Wed, 29 Sep 2021 02:58:07 +0000 (10:58 +0800)]
qtest/numa-test: Use detailed -smp CLIs in pc_dynamic_cpu_cfg

Since commit 80d7835749 (qemu-options: rewrite help for -smp options),
the preference of sockets/cores in -smp parsing is considered liable
to change, and actually we are going to change it in a coming commit.
So it'll be more stable to use detailed -smp CLIs in testing if we
have strong dependency on the parsing results.

pc_dynamic_cpu_cfg currently assumes/needs that there will be 2 CPU
sockets with "-smp 2". To avoid breaking the test because of parsing
logic change, now explicitly use "-smp 2,sockets=2".

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210929025816.21076-8-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomachine: Improve the error reporting of smp parsing
Yanan Wang [Wed, 29 Sep 2021 02:58:06 +0000 (10:58 +0800)]
machine: Improve the error reporting of smp parsing

We have two requirements for a valid SMP configuration:
the product of "sockets * cores * threads" must represent all the
possible cpus, i.e., max_cpus, and then must include the initially
present cpus, i.e., smp_cpus.

So we only need to ensure 1) "sockets * cores * threads == maxcpus"
at first and then ensure 2) "maxcpus >= cpus". With a reasonable
order of the sanity check, we can simplify the error reporting code.
When reporting an error message we also report the exact value of
each topology member to make users easily see what's going on.

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210929025816.21076-7-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomachine: Set the value of cpus to match maxcpus if it's omitted
Yanan Wang [Wed, 29 Sep 2021 02:58:05 +0000 (10:58 +0800)]
machine: Set the value of cpus to match maxcpus if it's omitted

Currently we directly calculate the omitted cpus based on the given
incomplete collection of parameters. This makes some cmdlines like:
  -smp maxcpus=16
  -smp sockets=2,maxcpus=16
  -smp sockets=2,dies=2,maxcpus=16
  -smp sockets=2,cores=4,maxcpus=16
not work. We should probably set the value of cpus to match maxcpus
if it's omitted, which will make above configs start to work.

So the calculation logic of cpus/maxcpus after this patch will be:
When both maxcpus and cpus are omitted, maxcpus will be calculated
from the given parameters and cpus will be set equal to maxcpus.
When only one of maxcpus and cpus is given then the omitted one
will be set to its counterpart's value. Both maxcpus and cpus may
be specified, but maxcpus must be equal to or greater than cpus.

Note: change in this patch won't affect any existing working cmdlines
but allows more incomplete configs to be valid.

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210929025816.21076-6-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomachine: Uniformly use maxcpus to calculate the omitted parameters
Yanan Wang [Wed, 29 Sep 2021 02:58:04 +0000 (10:58 +0800)]
machine: Uniformly use maxcpus to calculate the omitted parameters

We are currently using maxcpus to calculate the omitted sockets
but using cpus to calculate the omitted cores/threads. This makes
cmdlines like:
  -smp cpus=8,maxcpus=16
  -smp cpus=8,cores=4,maxcpus=16
  -smp cpus=8,threads=2,maxcpus=16
work fine but the ones like:
  -smp cpus=8,sockets=2,maxcpus=16
  -smp cpus=8,sockets=2,cores=4,maxcpus=16
  -smp cpus=8,sockets=2,threads=2,maxcpus=16
break the sanity check.

Since we require for a valid config that the product of "sockets * cores
* threads" should equal to the maxcpus, we should uniformly use maxcpus
to calculate their omitted values.

Also the if-branch of "cpus == 0 || sockets == 0" was split into two
branches of "cpus == 0" and "sockets == 0" so that we can clearly read
that we are parsing the configuration with a preference on cpus over
sockets over cores over threads.

Note: change in this patch won't affect any existing working cmdlines
but improves consistency and allows more incomplete configs to be valid.

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210929025816.21076-5-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomachine: Minor refactor/fix for the smp parsers
Yanan Wang [Wed, 29 Sep 2021 02:58:03 +0000 (10:58 +0800)]
machine: Minor refactor/fix for the smp parsers

To pave the way for the functional improvement in later patches,
make some refactor/cleanup for the smp parsers, including using
local maxcpus instead of ms->smp.max_cpus in the calculation,
defaulting dies to 0 initially like other members, cleanup the
sanity check for dies.

We actually also fix a hidden defect by avoiding directly using
the provided *zero value* in the calculation, which could cause
a segment fault (e.g. using dies=0 in the calculation).

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210929025816.21076-4-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomachine: Deprecate "parameter=0" SMP configurations
Yanan Wang [Wed, 29 Sep 2021 02:58:02 +0000 (10:58 +0800)]
machine: Deprecate "parameter=0" SMP configurations

In the SMP configuration, we should either provide a topology
parameter with a reasonable value (greater than zero) or just
omit it and QEMU will compute the missing value.

The users shouldn't provide a configuration with any parameter
of it specified as zero (e.g. -smp 8,sockets=0) which could
possibly cause unexpected results in the -smp parsing. So we
deprecate this kind of configurations since 6.2 by adding the
explicit sanity check.

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210929025816.21076-3-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoqapi/machine: Fix an incorrect comment of SMPConfiguration
Yanan Wang [Wed, 29 Sep 2021 02:58:01 +0000 (10:58 +0800)]
qapi/machine: Fix an incorrect comment of SMPConfiguration

The explanation of @cores should be "number of cores per die" but
not "number of cores per thread". Let's fix it.

Fixes: 1e63fe685804 ("machine: pass QAPI struct to mc->smp_parse")
Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210929025816.21076-2-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoMerge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20210930' into...
Peter Maydell [Thu, 30 Sep 2021 20:16:54 +0000 (21:16 +0100)]
Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20210930' into staging

target-arm queue:
 * allwinner-h3: Switch to SMC as PSCI conduit
 * arm: tcg: Adhere to SMCCC 1.3 section 5.2
 * xlnx-zcu102, xlnx-versal-virt: Support BBRAM and eFUSE devices
 * gdbstub related code cleanups
 * Don't put FPEXC and FPSID in org.gnu.gdb.arm.vfp XML
 * Use _init vs _new convention in bus creation function names
 * sabrelite: Connect SPI flash CS line to GPIO3_19

# gpg: Signature made Thu 30 Sep 2021 16:11:20 BST
# gpg:                using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg:                issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [ultimate]
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>" [ultimate]
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [ultimate]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* remotes/pmaydell/tags/pull-target-arm-20210930: (22 commits)
  hw/arm: sabrelite: Connect SPI flash CS line to GPIO3_19
  ide: Rename ide_bus_new() to ide_bus_init()
  qbus: Rename qbus_create() to qbus_new()
  qbus: Rename qbus_create_inplace() to qbus_init()
  pci: Rename pci_root_bus_new_inplace() to pci_root_bus_init()
  ipack: Rename ipack_bus_new_inplace() to ipack_bus_init()
  scsi: Replace scsi_bus_new() with scsi_bus_init(), scsi_bus_init_named()
  target/arm: Don't put FPEXC and FPSID in org.gnu.gdb.arm.vfp XML
  target/arm: Move gdbstub related code out of helper.c
  target/arm: Fix coding style issues in gdbstub code in helper.c
  configs: Don't include 32-bit-only GDB XML in aarch64 linux configs
  docs/system/arm: xlnx-versal-virt: BBRAM and eFUSE Usage
  hw/arm: xlnx-zcu102: Add Xilinx eFUSE device
  hw/arm: xlnx-zcu102: Add Xilinx BBRAM device
  hw/arm: xlnx-versal-virt: Add Xilinx eFUSE device
  hw/arm: xlnx-versal-virt: Add Xilinx BBRAM device
  hw/nvram: Introduce Xilinx battery-backed ram
  hw/nvram: Introduce Xilinx ZynqMP eFuse device
  hw/nvram: Introduce Xilinx Versal eFuse device
  hw/nvram: Introduce Xilinx eFuse QOM
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agoMerge remote-tracking branch 'remotes/bonzini-gitlab/tags/for-upstream' into staging
Peter Maydell [Thu, 30 Sep 2021 16:38:30 +0000 (17:38 +0100)]
Merge remote-tracking branch 'remotes/bonzini-gitlab/tags/for-upstream' into staging

* SGX implementation for x86
* Miscellaneous bugfixes
* Fix dependencies from ROMs to qtests

# gpg: Signature made Thu 30 Sep 2021 14:30:35 BST
# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini-gitlab/tags/for-upstream: (33 commits)
  meson_options.txt: Switch the default value for the vnc option to 'auto'
  build-sys: add HAVE_IPPROTO_MPTCP
  memory: Add tracepoint for dirty sync
  memory: Name all the memory listeners
  target/i386: Fix memory leak in sev_read_file_base64()
  tests: qtest: bios-tables-test depends on the unpacked edk2 ROMs
  meson: unpack edk2 firmware even if --disable-blobs
  target/i386: Add the query-sgx-capabilities QMP command
  target/i386: Add HMP and QMP interfaces for SGX
  docs/system: Add SGX documentation to the system manual
  sgx-epc: Add the fill_device_info() callback support
  i440fx: Add support for SGX EPC
  q35: Add support for SGX EPC
  i386: acpi: Add SGX EPC entry to ACPI tables
  i386/pc: Add e820 entry for SGX EPC section(s)
  hw/i386/pc: Account for SGX EPC sections when calculating device memory
  hw/i386/fw_cfg: Set SGX bits in feature control fw_cfg accordingly
  Adjust min CPUID level to 0x12 when SGX is enabled
  i386: Propagate SGX CPUID sub-leafs to KVM
  i386: kvm: Add support for exposing PROVISIONKEY to guest
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agoMerge remote-tracking branch 'remotes/dg-gitlab/tags/ppc-for-6.2-20210930' into staging
Peter Maydell [Thu, 30 Sep 2021 15:13:04 +0000 (16:13 +0100)]
Merge remote-tracking branch 'remotes/dg-gitlab/tags/ppc-for-6.2-20210930' into staging

ppc patch queue for 2021-09-30

Here's the next batch of ppc related patches for qemu-6.2.  Highlights
are:
 * Fixes for several TCG math instructions from the El Dorado Institute
 * A number of improvements to the powernv machine type
 * Support for a new DEVICE_UNPLUG_GUEST_ERROR QAPI event from Daniel
   Barboza
 * Support for the new FORM2 PAPR NUMA representation.  This allows
   more specific NUMA distances, as well as asymmetric configurations
 * Fix for 64-bit decrementer (used on MicroWatt CPUs)
 * Assorted fixes and cleanups
 * A number of updates to MAINTAINERS

Note that the DEVICE_UNPLUG_GUEST_ERROR stuff includes changes to
files outside my normal area, but has suitable Acks.

The MAINTAINERS updates are mostly about marking minor platforms
unmaintained / orphaned, and moving some pieces away from myself and
Greg.  As we move onto other projects, we're going to need to drop
more of the ppc maintainership, though we're hoping we can avoid too
abrupt a change.

# gpg: Signature made Thu 30 Sep 2021 06:42:41 BST
# gpg:                using RSA key 75F46586AE61A66CC44E87DC6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>" [full]
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>" [full]
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>" [full]
# gpg:                 aka "David Gibson (kernel.org) <dwg@kernel.org>" [unknown]
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dg-gitlab/tags/ppc-for-6.2-20210930: (44 commits)
  MAINTAINERS: Demote sPAPR from "Supported" to "Maintained"
  MAINTAINERS: Add information for OpenPIC
  MAINTAINERS: Remove David & Greg as reviewers/co-maintainers of powernv
  MAINTAINERS: Orphan obscure ppc platforms
  MAINTAINERS: Remove David & Greg as reviewers for a number of boards
  MAINTAINERS: Remove machine specific files from ppc TCG CPUs entry
  spapr/xive: Fix kvm_xive_source_reset trace event
  spapr_numa.c: fixes in spapr_numa_FORM2_write_rtas_tables()
  hw/intc: openpic: Clean up the styles
  hw/intc: openpic: Drop Raven related codes
  hw/intc: openpic: Correct the reset value of IPIDR for FSL chipset
  target/ppc: Fix 64-bit decrementer
  target/ppc: Convert debug to trace events (decrementer and IRQ)
  spapr_numa.c: handle auto NUMA node with no distance info
  spapr_numa.c: FORM2 NUMA affinity support
  spapr: move FORM1 verifications to post CAS
  spapr_numa.c: rename numa_assoc_array to FORM1_assoc_array
  spapr_numa.c: parametrize FORM1 macros
  spapr_numa.c: scrap 'legacy_numa' concept
  spapr_numa.c: split FORM1 code into helpers
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agomeson_options.txt: Switch the default value for the vnc option to 'auto'
Thomas Huth [Fri, 3 Sep 2021 08:13:55 +0000 (10:13 +0200)]
meson_options.txt: Switch the default value for the vnc option to 'auto'

There is no reason why VNC should always be enabled and not be set to
the default value. We already switched the setting in the "configure"
script in commit 3a6a1256d4 ("configure: Allow vnc to get disabled with
--without-default-features"), so let's do that in meson_options.txt now,
too.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210903081358.956267-3-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agobuild-sys: add HAVE_IPPROTO_MPTCP
Marc-André Lureau [Tue, 7 Sep 2021 12:19:13 +0000 (16:19 +0400)]
build-sys: add HAVE_IPPROTO_MPTCP

The QAPI schema shouldn't rely on C system headers #define, but on
configure-time project #define, so we can express the build condition in
a C-independent way.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210907121943.3498701-3-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomemory: Add tracepoint for dirty sync
Peter Xu [Tue, 17 Aug 2021 01:37:06 +0000 (21:37 -0400)]
memory: Add tracepoint for dirty sync

Trace at memory_region_sync_dirty_bitmap() for log_sync() or global_log_sync()
on memory regions.  One trace line should suffice when it finishes, so as to
estimate the time used for each log sync process.

Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20210817013706.30986-1-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomemory: Name all the memory listeners
Peter Xu [Tue, 17 Aug 2021 01:35:52 +0000 (21:35 -0400)]
memory: Name all the memory listeners

Provide a name field for all the memory listeners.  It can be used to identify
which memory listener is which.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210817013553.30584-2-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agotarget/i386: Fix memory leak in sev_read_file_base64()
Peter Maydell [Fri, 20 Aug 2021 16:56:50 +0000 (17:56 +0100)]
target/i386: Fix memory leak in sev_read_file_base64()

In sev_read_file_base64() we call g_file_get_contents(), which
allocates memory for the file contents.  We then base64-decode the
contents (which allocates another buffer for the decoded data), but
forgot to free the memory for the original file data.

Use g_autofree to ensure that the file data is freed.

Fixes: Coverity CID 1459997
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210820165650.2839-1-peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agotests: qtest: bios-tables-test depends on the unpacked edk2 ROMs
Paolo Bonzini [Thu, 23 Sep 2021 10:55:29 +0000 (06:55 -0400)]
tests: qtest: bios-tables-test depends on the unpacked edk2 ROMs

Skip the test if bzip2 is not available, and run it after they are
uncompressed.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210923105529.3845741-2-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomeson: unpack edk2 firmware even if --disable-blobs
Paolo Bonzini [Thu, 23 Sep 2021 10:55:28 +0000 (06:55 -0400)]
meson: unpack edk2 firmware even if --disable-blobs

The edk2 firmware blobs are needed to run bios-tables-test.  Unpack
them if any UEFI-enabled target is selected, so that the test can run.
This is a bit more than is actually necessary, since bios-tables-test
does not run for all UEFI-enabled targets, but it is the easiest
way to write this logic.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210923105529.3845741-1-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agotarget/i386: Add the query-sgx-capabilities QMP command
Yang Zhong [Fri, 10 Sep 2021 10:22:57 +0000 (18:22 +0800)]
target/i386: Add the query-sgx-capabilities QMP command

Libvirt can use query-sgx-capabilities to get the host
sgx capabilities to decide how to allocate SGX EPC size to VM.

Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210910102258.46648-3-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agotarget/i386: Add HMP and QMP interfaces for SGX
Yang Zhong [Fri, 10 Sep 2021 10:22:56 +0000 (18:22 +0800)]
target/i386: Add HMP and QMP interfaces for SGX

The QMP and HMP interfaces can be used by monitor or QMP tools to retrieve
the SGX information from VM side when SGX is enabled on Intel platform.

Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210910102258.46648-2-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agodocs/system: Add SGX documentation to the system manual
Sean Christopherson [Mon, 19 Jul 2021 11:21:36 +0000 (19:21 +0800)]
docs/system: Add SGX documentation to the system manual

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-34-yang.zhong@intel.com>
[Convert to reStructuredText, and adopt the standard === --- ~~~ headings
 suggested for example by Linux. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agosgx-epc: Add the fill_device_info() callback support
Yang Zhong [Mon, 19 Jul 2021 11:21:35 +0000 (19:21 +0800)]
sgx-epc: Add the fill_device_info() callback support

Since there is no fill_device_info() callback support, and when we
execute "info memory-devices" command in the monitor, the segfault
will be found.

This patch will add this callback support and "info memory-devices"
will show sgx epc memory exposed to guest. The result as below:

qemu) info memory-devices
Memory device [sgx-epc]: ""
  memaddr: 0x180000000
  size: 29360128
  memdev: /objects/mem1
Memory device [sgx-epc]: ""
  memaddr: 0x181c00000
  size: 10485760
  memdev: /objects/mem2

Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-33-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi440fx: Add support for SGX EPC
Sean Christopherson [Mon, 19 Jul 2021 11:21:24 +0000 (19:21 +0800)]
i440fx: Add support for SGX EPC

Enable SGX EPC virtualization, which is currently only support by KVM.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-22-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoq35: Add support for SGX EPC
Sean Christopherson [Mon, 19 Jul 2021 11:21:23 +0000 (19:21 +0800)]
q35: Add support for SGX EPC

Enable SGX EPC virtualization, which is currently only support by KVM.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-21-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: acpi: Add SGX EPC entry to ACPI tables
Sean Christopherson [Mon, 19 Jul 2021 11:21:22 +0000 (19:21 +0800)]
i386: acpi: Add SGX EPC entry to ACPI tables

The ACPI Device entry for SGX EPC is essentially a hack whose primary
purpose is to provide software with a way to autoprobe SGX support,
e.g. to allow software to implement SGX support as a driver.  Details
on the individual EPC sections are not enumerated through ACPI tables,
i.e. software must enumerate the EPC sections via CPUID.  Furthermore,
software expects to see only a single EPC Device in the ACPI tables
regardless of the number of EPC sections in the system.

However, several versions of Windows do rely on the ACPI tables to
enumerate the address and size of the EPC.  So, regardless of the number
of EPC sections exposed to the guest, create exactly *one* EPC device
with a _CRS entry that spans the entirety of all EPC sections (which are
guaranteed to be contiguous in Qemu).

Note, NUMA support for EPC memory is intentionally not considered as
enumerating EPC NUMA information is not yet defined for bare metal.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-20-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386/pc: Add e820 entry for SGX EPC section(s)
Sean Christopherson [Mon, 19 Jul 2021 11:21:21 +0000 (19:21 +0800)]
i386/pc: Add e820 entry for SGX EPC section(s)

Note that SGX EPC is currently guaranteed to reside in a single
contiguous chunk of memory regardless of the number of EPC sections.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-19-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agohw/i386/pc: Account for SGX EPC sections when calculating device memory
Sean Christopherson [Mon, 19 Jul 2021 11:21:20 +0000 (19:21 +0800)]
hw/i386/pc: Account for SGX EPC sections when calculating device memory

Add helpers to detect if SGX EPC exists above 4g, and if so, where SGX
EPC above 4g ends.  Use the helpers to adjust the device memory range
if SGX EPC exists above 4g.

For multiple virtual EPC sections, we just put them together physically
contiguous for the simplicity because we don't support EPC NUMA affinity
now. Once the SGX EPC NUMA support in the kernel SGX driver, we will
support this in the future.

Note that SGX EPC is currently hardcoded to reside above 4g.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-18-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agohw/i386/fw_cfg: Set SGX bits in feature control fw_cfg accordingly
Sean Christopherson [Mon, 19 Jul 2021 11:21:19 +0000 (19:21 +0800)]
hw/i386/fw_cfg: Set SGX bits in feature control fw_cfg accordingly

Request SGX an SGX Launch Control to be enabled in FEATURE_CONTROL
when the features are exposed to the guest. Our design is the SGX
Launch Control bit will be unconditionally set in FEATURE_CONTROL,
which is unlike host bios.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-17-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoAdjust min CPUID level to 0x12 when SGX is enabled
Sean Christopherson [Mon, 19 Jul 2021 11:21:18 +0000 (19:21 +0800)]
Adjust min CPUID level to 0x12 when SGX is enabled

SGX capabilities are enumerated through CPUID_0x12.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-16-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Propagate SGX CPUID sub-leafs to KVM
Sean Christopherson [Mon, 19 Jul 2021 11:21:17 +0000 (19:21 +0800)]
i386: Propagate SGX CPUID sub-leafs to KVM

The SGX sub-leafs are enumerated at CPUID 0x12.  Indices 0 and 1 are
always present when SGX is supported, and enumerate SGX features and
capabilities.  Indices >=2 are directly correlated with the platform's
EPC sections.  Because the number of EPC sections is dynamic and user
defined, the number of SGX sub-leafs is "NULL" terminated.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-15-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: kvm: Add support for exposing PROVISIONKEY to guest
Sean Christopherson [Mon, 19 Jul 2021 11:21:16 +0000 (19:21 +0800)]
i386: kvm: Add support for exposing PROVISIONKEY to guest

If the guest want to fully use SGX, the guest needs to be able to
access provisioning key. Add a new KVM_CAP_SGX_ATTRIBUTE to KVM to
support provisioning key to KVM guests.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-14-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Update SGX CPUID info according to hardware/KVM/user input
Sean Christopherson [Mon, 19 Jul 2021 11:21:15 +0000 (19:21 +0800)]
i386: Update SGX CPUID info according to hardware/KVM/user input

Expose SGX to the guest if and only if KVM is enabled and supports
virtualization of SGX.  While the majority of ENCLS can be emulated to
some degree, because SGX uses a hardware-based root of trust, the
attestation aspects of SGX cannot be emulated in software, i.e.
ultimately emulation will fail as software cannot generate a valid
quote/report.  The complexity of partially emulating SGX in Qemu far
outweighs the value added, e.g. an SGX specific simulator for userspace
applications can emulate SGX for development and testing purposes.

Note, access to the PROVISIONKEY is not yet advertised to the guest as
KVM blocks access to the PROVISIONKEY by default and requires userspace
to provide additional credentials (via ioctl()) to expose PROVISIONKEY.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-13-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Add feature control MSR dependency when SGX is enabled
Sean Christopherson [Mon, 19 Jul 2021 11:21:14 +0000 (19:21 +0800)]
i386: Add feature control MSR dependency when SGX is enabled

SGX adds multiple flags to FEATURE_CONTROL to enable SGX and Flexible
Launch Control.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-12-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Add get/set/migrate support for SGX_LEPUBKEYHASH MSRs
Sean Christopherson [Mon, 19 Jul 2021 11:21:13 +0000 (19:21 +0800)]
i386: Add get/set/migrate support for SGX_LEPUBKEYHASH MSRs

On real hardware, on systems that supports SGX Launch Control, those
MSRs are initialized to digest of Intel's signing key; on systems that
don't support SGX Launch Control, those MSRs are not available but
hardware always uses digest of Intel's signing key in EINIT.

KVM advertises SGX LC via CPUID if and only if the MSRs are writable.
Unconditionally initialize those MSRs to digest of Intel's signing key
when CPU is realized and reset to reflect the fact. This avoids
potential bug in case kvm_arch_put_registers() is called before
kvm_arch_get_registers() is called, in which case guest's virtual
SGX_LEPUBKEYHASH MSRs will be set to 0, although KVM initializes those
to digest of Intel's signing key by default, since KVM allows those MSRs
to be updated by Qemu to support live migration.

Save/restore the SGX Launch Enclave Public Key Hash MSRs if SGX Launch
Control (LC) is exposed to the guest. Likewise, migrate the MSRs if they
are writable by the guest.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-11-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Add SGX CPUID leaf FEAT_SGX_12_1_EAX
Sean Christopherson [Mon, 19 Jul 2021 11:21:12 +0000 (19:21 +0800)]
i386: Add SGX CPUID leaf FEAT_SGX_12_1_EAX

CPUID leaf 12_1_EAX is an Intel-defined feature bits leaf enumerating
the platform's SGX capabilities that may be utilized by an enclave, e.g.
whether or not an enclave can gain access to the provision key.
Currently there are six capabilities:

   - INIT: set when the enclave has has been initialized by EINIT.  Cannot
           be set by software, i.e. forced to zero in CPUID.
   - DEBUG: permits a debugger to read/write into the enclave.
   - MODE64BIT: the enclave runs in 64-bit mode
   - PROVISIONKEY: grants has access to the provision key
   - EINITTOKENKEY: grants access to the EINIT token key, i.e. the
                    enclave can generate EINIT tokens
   - KSS: Key Separation and Sharing enabled for the enclave.

Note that the entirety of CPUID.0x12.0x1, i.e. all registers, enumerates
the allowed ATTRIBUTES (128 bits), but only bits 31:0 are directly
exposed to the user (via FEAT_12_1_EAX).  Bits 63:32 are currently all
reserved and bits 127:64 correspond to the allowed XSAVE Feature Request
Mask, which is calculated based on other CPU features, e.g. XSAVE, MPX,
AVX, etc... and is not exposed to the user.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-10-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Add SGX CPUID leaf FEAT_SGX_12_0_EBX
Sean Christopherson [Mon, 19 Jul 2021 11:21:11 +0000 (19:21 +0800)]
i386: Add SGX CPUID leaf FEAT_SGX_12_0_EBX

CPUID leaf 12_0_EBX is an Intel-defined feature bits leaf enumerating
the platform's SGX extended capabilities.  Currently there is a single
capabilitiy:

   - EXINFO: record information about #PFs and #GPs in the enclave's SSA

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-9-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Add SGX CPUID leaf FEAT_SGX_12_0_EAX
Sean Christopherson [Mon, 19 Jul 2021 11:21:10 +0000 (19:21 +0800)]
i386: Add SGX CPUID leaf FEAT_SGX_12_0_EAX

CPUID leaf 12_0_EAX is an Intel-defined feature bits leaf enumerating
the CPU's SGX capabilities, e.g. supported SGX instruction sets.
Currently there are four enumerated capabilities:

    - SGX1 instruction set, i.e. "base" SGX
    - SGX2 instruction set for dynamic EPC management
    - ENCLV instruction set for VMM oversubscription of EPC
    - ENCLS-C instruction set for thread safe variants of ENCLS

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-8-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Add primary SGX CPUID and MSR defines
Sean Christopherson [Mon, 19 Jul 2021 11:21:09 +0000 (19:21 +0800)]
i386: Add primary SGX CPUID and MSR defines

Add CPUID defines for SGX and SGX Launch Control (LC), as well as
defines for their associated FEATURE_CONTROL MSR bits.  Define the
Launch Enclave Public Key Hash MSRs (LE Hash MSRs), which exist
when SGX LC is present (in CPUID), and are writable when SGX LC is
enabled (in FEATURE_CONTROL).

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-7-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agovl: Add sgx compound properties to expose SGX EPC sections to guest
Sean Christopherson [Tue, 28 Sep 2021 08:40:58 +0000 (10:40 +0200)]
vl: Add sgx compound properties to expose SGX EPC sections to guest

Because SGX EPC is enumerated through CPUID, EPC "devices" need to be
realized prior to realizing the vCPUs themselves, i.e. long before
generic devices are parsed and realized.  From a virtualization
perspective, the CPUID aspect also means that EPC sections cannot be
hotplugged without paravirtualizing the guest kernel (hardware does
not support hotplugging as EPC sections must be locked down during
pre-boot to provide EPC's security properties).

So even though EPC sections could be realized through the generic
-devices command, they need to be created much earlier for them to
actually be usable by the guest.  Place all EPC sections in a
contiguous block, somewhat arbitrarily starting after RAM above 4g.
Ensuring EPC is in a contiguous region simplifies calculations, e.g.
device memory base, PCI hole, etc..., allows dynamic calculation of the
total EPC size, e.g. exposing EPC to guests does not require -maxmem,
and last but not least allows all of EPC to be enumerated in a single
ACPI entry, which is expected by some kernels, e.g. Windows 7 and 8.

The new compound properties command for sgx like below:
 ......
 -object memory-backend-epc,id=mem1,size=28M,prealloc=on \
 -object memory-backend-epc,id=mem2,size=10M \
 -M sgx-epc.0.memdev=mem1,sgx-epc.1.memdev=mem2

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-6-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoi386: Add 'sgx-epc' device to expose EPC sections to guest
Sean Christopherson [Mon, 19 Jul 2021 11:21:07 +0000 (19:21 +0800)]
i386: Add 'sgx-epc' device to expose EPC sections to guest

SGX EPC is enumerated through CPUID, i.e. EPC "devices" need to be
realized prior to realizing the vCPUs themselves, which occurs long
before generic devices are parsed and realized.  Because of this,
do not allow 'sgx-epc' devices to be instantiated after vCPUS have
been created.

The 'sgx-epc' device is essentially a placholder at this time, it will
be fully implemented in a future patch along with a dedicated command
to create 'sgx-epc' devices.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-5-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoqom: Add memory-backend-epc ObjectOptions support
Yang Zhong [Mon, 19 Jul 2021 11:21:06 +0000 (19:21 +0800)]
qom: Add memory-backend-epc ObjectOptions support

Add the new 'memory-backend-epc' user creatable QOM object in
the ObjectOptions to support SGX since v6.1, or the sgx backend
object cannot bootup.

Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-4-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agohostmem: Add hostmem-epc as a backend for SGX EPC
Sean Christopherson [Mon, 19 Jul 2021 11:21:05 +0000 (19:21 +0800)]
hostmem: Add hostmem-epc as a backend for SGX EPC

EPC (Enclave Page Cahe) is a specialized type of memory used by Intel
SGX (Software Guard Extensions).  The SDM desribes EPC as:

    The Enclave Page Cache (EPC) is the secure storage used to store
    enclave pages when they are a part of an executing enclave. For an
    EPC page, hardware performs additional access control checks to
    restrict access to the page. After the current page access checks
    and translations are performed, the hardware checks that the EPC
    page is accessible to the program currently executing. Generally an
    EPC page is only accessed by the owner of the executing enclave or
    an instruction which is setting up an EPC page.

Because of its unique requirements, Linux manages EPC separately from
normal memory.  Similar to memfd, the device /dev/sgx_vepc can be
opened to obtain a file descriptor which can in turn be used to mmap()
EPC memory.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-3-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKconfig: Add CONFIG_SGX support
Yang Zhong [Mon, 19 Jul 2021 11:21:34 +0000 (19:21 +0800)]
Kconfig: Add CONFIG_SGX support

Add new CONFIG_SGX for sgx support in the Qemu, and the Kconfig
default enable sgx in the i386 platform.

Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-32-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agomemory: Add RAM_PROTECTED flag to skip IOMMU mappings
Sean Christopherson [Mon, 19 Jul 2021 11:21:04 +0000 (19:21 +0800)]
memory: Add RAM_PROTECTED flag to skip IOMMU mappings

Add a new RAMBlock flag to denote "protected" memory, i.e. memory that
looks and acts like RAM but is inaccessible via normal mechanisms,
including DMA.  Use the flag to skip protected memory regions when
mapping RAM for DMA in VFIO.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agohw/arm: sabrelite: Connect SPI flash CS line to GPIO3_19
Xuzhou Cheng [Mon, 27 Sep 2021 14:28:25 +0000 (22:28 +0800)]
hw/arm: sabrelite: Connect SPI flash CS line to GPIO3_19

The Linux spi-imx driver does not work on QEMU. The reason is that the
state of m25p80 loops in STATE_READING_DATA state after receiving
RDSR command, the new command is ignored. Before sending a new command,
CS line should be pulled high to make the state of m25p80 back to IDLE.

Currently the SPI flash CS line is connected to the SPI controller, but
on the real board, it's connected to GPIO3_19. This matches the ecspi1
device node in the board dts.

ecspi1 node in imx6qdl-sabrelite.dtsi:
  &ecspi1 {
          cs-gpios = <&gpio3 19 GPIO_ACTIVE_LOW>;
          pinctrl-names = "default";
          pinctrl-0 = <&pinctrl_ecspi1>;
          status = "okay";

          flash: m25p80@0 {
                  compatible = "sst,sst25vf016b", "jedec,spi-nor";
                  spi-max-frequency = <20000000>;
                  reg = <0>;
          };
  };

Should connect the SSI_GPIO_CS to GPIO3_19 when adding a spi-nor to
spi1 on sabrelite machine.

Verified this patch on Linux v5.14.

Logs:
  # echo "01234567899876543210" > test
  # mtd_debug erase /dev/mtd0 0x0 0x1000
  Erased 4096 bytes from address 0x00000000 in flash
  # mtd_debug write /dev/mtdblock0 0x0 20 test
  Copied 20 bytes from test to address 0x00000000 in flash
  # mtd_debug read /dev/mtdblock0 0x0 20 test_out
  Copied 20 bytes from address 0x00000000 in flash to test_out
  # cat test_out
  01234567899876543210#

Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20210927142825.491-1-xchengl.cn@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agoide: Rename ide_bus_new() to ide_bus_init()
Peter Maydell [Thu, 23 Sep 2021 12:11:53 +0000 (13:11 +0100)]
ide: Rename ide_bus_new() to ide_bus_init()

The function ide_bus_new() does an in-place initialization.  Rename
it to ide_bus_init() to follow our _init vs _new convention.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Acked-by: John Snow <jsnow@redhat.com> (Feel free to merge.)
Message-id: 20210923121153.23754-7-peter.maydell@linaro.org

2 years agoqbus: Rename qbus_create() to qbus_new()
Peter Maydell [Thu, 23 Sep 2021 12:11:52 +0000 (13:11 +0100)]
qbus: Rename qbus_create() to qbus_new()

Rename the "allocate and return" qbus creation function to
qbus_new(), to bring it into line with our _init vs _new convention.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Corey Minyard <cminyard@mvista.com>
Message-id: 20210923121153.23754-6-peter.maydell@linaro.org

2 years agoqbus: Rename qbus_create_inplace() to qbus_init()
Peter Maydell [Thu, 23 Sep 2021 12:11:51 +0000 (13:11 +0100)]
qbus: Rename qbus_create_inplace() to qbus_init()

Rename qbus_create_inplace() to qbus_init(); this is more in line
with our usual naming convention for functions that in-place
initialize objects.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20210923121153.23754-5-peter.maydell@linaro.org

2 years agopci: Rename pci_root_bus_new_inplace() to pci_root_bus_init()
Peter Maydell [Thu, 23 Sep 2021 12:11:50 +0000 (13:11 +0100)]
pci: Rename pci_root_bus_new_inplace() to pci_root_bus_init()

Rename the pci_root_bus_new_inplace() function to
pci_root_bus_init(); this brings the bus type in to line with a
"_init for in-place init, _new for allocate-and-return" convention.
To do this we need to rename the implementation-internal function
that was using the pci_root_bus_init() name to
pci_root_bus_internal_init().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20210923121153.23754-4-peter.maydell@linaro.org

2 years agoipack: Rename ipack_bus_new_inplace() to ipack_bus_init()
Peter Maydell [Thu, 23 Sep 2021 12:11:49 +0000 (13:11 +0100)]
ipack: Rename ipack_bus_new_inplace() to ipack_bus_init()

Rename ipack_bus_new_inplace() to ipack_bus_init(), to bring it in to
line with a "_init for in-place init, _new for allocate-and-return"
convention.  Drop the 'name' argument, because the only caller does
not pass in a name.  If a future caller does need to specify the bus
name, we should create an ipack_bus_init_named() function at that
point.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20210923121153.23754-3-peter.maydell@linaro.org

2 years agoscsi: Replace scsi_bus_new() with scsi_bus_init(), scsi_bus_init_named()
Peter Maydell [Thu, 23 Sep 2021 12:11:48 +0000 (13:11 +0100)]
scsi: Replace scsi_bus_new() with scsi_bus_init(), scsi_bus_init_named()

The function scsi_bus_new() creates a new SCSI bus; callers can
either pass in a name argument to specify the name of the new bus, or
they can pass in NULL to allow the bus to be given an automatically
generated unique name.  Almost all callers want to use the
autogenerated name; the only exception is the virtio-scsi device.

Taking a name argument that should almost always be NULL is an
easy-to-misuse API design -- it encourages callers to think perhaps
they should pass in some standard name like "scsi" or "scsi-bus".  We
don't do this anywhere for SCSI, but we do (incorrectly) do it for
other bus types such as i2c.

The function name also implies that it will return a newly allocated
object, when it in fact does in-place allocation.  We more commonly
name such functions foo_init(), with foo_new() being the
allocate-and-return variant.

Replace all the scsi_bus_new() callsites with either:
 * scsi_bus_init() for the usual case where the caller wants
   an autogenerated bus name
 * scsi_bus_init_named() for the rare case where the caller
   needs to specify the bus name

and document that for the _named() version it's then the caller's
responsibility to think about uniqueness of bus names.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20210923121153.23754-2-peter.maydell@linaro.org

2 years agotarget/arm: Don't put FPEXC and FPSID in org.gnu.gdb.arm.vfp XML
Peter Maydell [Tue, 21 Sep 2021 16:29:00 +0000 (17:29 +0100)]
target/arm: Don't put FPEXC and FPSID in org.gnu.gdb.arm.vfp XML

Currently we send VFP XML which includes D0..D15 or D0..D31, plus
FPSID, FPSCR and FPEXC.  The upstream GDB tolerates this, but its
definition of this XML feature does not include FPSID or FPEXC.  In
particular, for M-profile cores there are no FPSID or FPEXC
registers, so advertising those is wrong.

Move FPSID and FPEXC into their own bit of XML which we only send for
A and R profile cores.  This brings our definition of the XML
org.gnu.gdb.arm.vfp feature into line with GDB's own (at least for
non-Neon cores...) and means we don't claim to have FPSID and FPEXC
on M-profile.

(It seems unlikely to me that any gdbstub users really care about
being able to look at FPEXC and FPSID; but we've supplied them to gdb
for a decade and it's not hard to keep doing so.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210921162901.17508-5-peter.maydell@linaro.org

2 years agotarget/arm: Move gdbstub related code out of helper.c
Peter Maydell [Tue, 21 Sep 2021 16:28:59 +0000 (17:28 +0100)]
target/arm: Move gdbstub related code out of helper.c

Currently helper.c includes some code which is part of the arm
target's gdbstub support.  This code has a better home: in gdbstub.c
and gdbstub64.c.  Move it there.

Because aarch64_fpu_gdb_get_reg() and aarch64_fpu_gdb_set_reg() move
into gdbstub64.c, this means that they're now compiled only for
TARGET_AARCH64 rather than always.  That is the only case when they
would ever be used, but it does mean that the ifdef in
arm_cpu_register_gdb_regs_for_features() needs to be adjusted to
match.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210921162901.17508-4-peter.maydell@linaro.org

2 years agotarget/arm: Fix coding style issues in gdbstub code in helper.c
Peter Maydell [Tue, 21 Sep 2021 16:28:58 +0000 (17:28 +0100)]
target/arm: Fix coding style issues in gdbstub code in helper.c

We're going to move this code to a different file; fix the coding
style first so checkpatch doesn't complain.  This includes deleting
the spurious 'break' statements after returns in the
vfp_gdb_get_reg() function.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210921162901.17508-3-peter.maydell@linaro.org

2 years agoconfigs: Don't include 32-bit-only GDB XML in aarch64 linux configs
Peter Maydell [Tue, 21 Sep 2021 16:28:57 +0000 (17:28 +0100)]
configs: Don't include 32-bit-only GDB XML in aarch64 linux configs

The aarch64-linux QEMU usermode binaries can never run 32-bit
code, so they do not need to include the GDB XML for it.
(arm_cpu_register_gdb_regs_for_features() will not use these
XML files if the CPU has ARM_FEATURE_AARCH64, so we will not
advertise to gdb that we have them.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210921162901.17508-2-peter.maydell@linaro.org

2 years agodocs/system/arm: xlnx-versal-virt: BBRAM and eFUSE Usage
Tong Ho [Fri, 17 Sep 2021 05:24:00 +0000 (22:24 -0700)]
docs/system/arm: xlnx-versal-virt: BBRAM and eFUSE Usage

Add BBRAM and eFUSE usage to the Xilinx Versal Virt board
document.

Signed-off-by: Tong Ho <tong.ho@xilinx.com>
Message-id: 20210917052400.1249094-10-tong.ho@xilinx.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agohw/arm: xlnx-zcu102: Add Xilinx eFUSE device
Tong Ho [Fri, 17 Sep 2021 05:23:59 +0000 (22:23 -0700)]
hw/arm: xlnx-zcu102: Add Xilinx eFUSE device

Connect the support for ZynqMP eFUSE one-time field-programmable
bit array.

The command argument:
  -drive if=pflash,index=3,...
Can be used to optionally connect the bit array to a
backend storage, such that field-programmed values
in one invocation can be made available to next
invocation.

The backend storage must be a seekable binary file, and
its size must be 768 bytes or larger. A file with all
binary 0's is a 'blank'.

Signed-off-by: Tong Ho <tong.ho@xilinx.com>
Message-id: 20210917052400.1249094-9-tong.ho@xilinx.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agohw/arm: xlnx-zcu102: Add Xilinx BBRAM device
Tong Ho [Fri, 17 Sep 2021 05:23:58 +0000 (22:23 -0700)]
hw/arm: xlnx-zcu102: Add Xilinx BBRAM device

Connect the support for Xilinx ZynqMP Battery-Backed RAM (BBRAM)

The command argument:
  -drive if=pflash,index=2,...
Can be used to optionally connect the bbram to a backend
storage, such that field-programmed values in one
invocation can be made available to next invocation.

The backend storage must be a seekable binary file, and
its size must be 36 bytes or larger. A file with all
binary 0's is a 'blank'.

Signed-off-by: Tong Ho <tong.ho@xilinx.com>
Message-id: 20210917052400.1249094-8-tong.ho@xilinx.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agohw/arm: xlnx-versal-virt: Add Xilinx eFUSE device
Tong Ho [Fri, 17 Sep 2021 05:23:57 +0000 (22:23 -0700)]
hw/arm: xlnx-versal-virt: Add Xilinx eFUSE device

Connect the support for Versal eFUSE one-time field-programmable
bit array.

The command argument:
  -drive if=pflash,index=1,...
Can be used to optionally connect the bit array to a
backend storage, such that field-programmed values
in one invocation can be made available to next
invocation.

The backend storage must be a seekable binary file, and
its size must be 3072 bytes or larger. A file with all
binary 0's is a 'blank'.

Signed-off-by: Tong Ho <tong.ho@xilinx.com>
Message-id: 20210917052400.1249094-7-tong.ho@xilinx.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agohw/arm: xlnx-versal-virt: Add Xilinx BBRAM device
Tong Ho [Fri, 17 Sep 2021 05:23:56 +0000 (22:23 -0700)]
hw/arm: xlnx-versal-virt: Add Xilinx BBRAM device

Connect the support for Versal Battery-Backed RAM (BBRAM)

The command argument:
  -drive if=pflash,index=0,...
Can be used to optionally connect the bbram to a backend
storage, such that field-programmed values in one
invocation can be made available to next invocation.

The backend storage must be a seekable binary file, and
its size must be 36 bytes or larger. A file with all
binary 0's is a 'blank'.

Signed-off-by: Tong Ho <tong.ho@xilinx.com>
Message-id: 20210917052400.1249094-6-tong.ho@xilinx.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agohw/nvram: Introduce Xilinx battery-backed ram
Tong Ho [Fri, 17 Sep 2021 05:23:55 +0000 (22:23 -0700)]
hw/nvram: Introduce Xilinx battery-backed ram

This device is present in Versal and ZynqMP product
families to store a 256-bit encryption key.

Co-authored-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Co-authored-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
Signed-off-by: Tong Ho <tong.ho@xilinx.com>
Message-id: 20210917052400.1249094-5-tong.ho@xilinx.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agohw/nvram: Introduce Xilinx ZynqMP eFuse device
Tong Ho [Fri, 17 Sep 2021 05:23:54 +0000 (22:23 -0700)]
hw/nvram: Introduce Xilinx ZynqMP eFuse device

This implements the Xilinx ZynqMP eFuse, an one-time
field-programmable non-volatile storage device.  There is
only one such device in the Xilinx ZynqMP product family.

Co-authored-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Co-authored-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
Signed-off-by: Tong Ho <tong.ho@xilinx.com>
Message-id: 20210917052400.1249094-4-tong.ho@xilinx.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agohw/nvram: Introduce Xilinx Versal eFuse device
Tong Ho [Fri, 17 Sep 2021 05:23:53 +0000 (22:23 -0700)]
hw/nvram: Introduce Xilinx Versal eFuse device

This implements the Xilinx Versal eFuse, an one-time
field-programmable non-volatile storage device.  There is
only one such device in the Xilinx Versal product family.

This device has two separate mmio interfaces, a controller
and a flatten readback.

The controller provides interfaces for field-programming,
configuration, control, and status.

The flatten readback is a cache to provide a byte-accessible
read-only interface to efficiently read efuse array.

Co-authored-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Co-authored-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
Signed-off-by: Tong Ho <tong.ho@xilinx.com>
Message-id: 20210917052400.1249094-3-tong.ho@xilinx.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agohw/nvram: Introduce Xilinx eFuse QOM
Tong Ho [Fri, 17 Sep 2021 05:23:52 +0000 (22:23 -0700)]
hw/nvram: Introduce Xilinx eFuse QOM

This introduces the QOM for Xilinx eFuse, an one-time
field-programmable storage bit array.

The actual mmio interface to the array varies by device
families and will be provided in different change-sets.

Co-authored-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Co-authored-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
Signed-off-by: Tong Ho <tong.ho@xilinx.com>
Message-id: 20210917052400.1249094-2-tong.ho@xilinx.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agoarm: tcg: Adhere to SMCCC 1.3 section 5.2
Alexander Graf [Thu, 16 Sep 2021 15:54:04 +0000 (17:54 +0200)]
arm: tcg: Adhere to SMCCC 1.3 section 5.2

The SMCCC 1.3 spec section 5.2 says

  The Unknown SMC Function Identifier is a sign-extended value of (-1)
  that is returned in the R0, W0 or X0 registers. An implementation must
  return this error code when it receives:

    * An SMC or HVC call with an unknown Function Identifier
    * An SMC or HVC call for a removed Function Identifier
    * An SMC64/HVC64 call from AArch32 state

To comply with these statements, let's always return -1 when we encounter
an unknown HVC or SMC call.

Signed-off-by: Alexander Graf <agraf@csgraf.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agoallwinner-h3: Switch to SMC as PSCI conduit
Alexander Graf [Mon, 20 Sep 2021 20:39:31 +0000 (22:39 +0200)]
allwinner-h3: Switch to SMC as PSCI conduit

The Allwinner H3 SoC uses Cortex-A7 cores which support virtualization.
However, today we are configuring QEMU to use HVC as PSCI conduit.

That means HVC calls get trapped into QEMU instead of the guest's own
emulated CPU and thus break the guest's ability to execute virtualization.

Fix this by moving to SMC as conduit, freeing up HYP completely to the VM.

Signed-off-by: Alexander Graf <agraf@csgraf.de>
Message-id: 20210920203931.66527-1-agraf@csgraf.de
Fixes: 740dafc0ba0 ("hw/arm: add Allwinner H3 System-on-Chip")
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agoMerge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2021-09-27-v2' into staging
Peter Maydell [Thu, 30 Sep 2021 10:28:30 +0000 (11:28 +0100)]
Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2021-09-27-v2' into staging

nbd patches for 2021-09-27

- Vladimir Sementsov-Ogievskiy: Rework coroutines of qemu NBD client
  to improve reconnect support
- Eric Blake: Relax server in regards to NBD_OPT_LIST_META_CONTEXT
- Vladimir Sementsov-Ogievskiy: Plumb up 64-bit bulk-zeroing support
  in block layer, in preparation for future NBD spec extensions
- Nir Soffer: Default to writeback cache in qemu-nbd

# gpg: Signature made Wed 29 Sep 2021 22:07:58 BST
# gpg:                using RSA key 71C2CC22B1C4602927D2F3AAA7A16B4A2527436A
# gpg: Good signature from "Eric Blake <eblake@redhat.com>" [full]
# gpg:                 aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>" [full]
# gpg:                 aka "[jpeg image of size 6874]" [full]
# Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2  F3AA A7A1 6B4A 2527 436A

* remotes/ericb/tags/pull-nbd-2021-09-27-v2:
  block/nbd: check that received handle is valid
  block/nbd: drop connection_co
  block/nbd: refactor nbd_recv_coroutines_wake_all()
  block/nbd: move nbd_recv_coroutines_wake_all() up
  block/nbd: nbd_channel_error() shutdown channel unconditionally
  nbd/client-connection: nbd_co_establish_connection(): fix non set errp
  nbd/server: Allow LIST_META_CONTEXT without STRUCTURED_REPLY
  block/io: allow 64bit discard requests
  block: use int64_t instead of int in driver discard handlers
  block: make BlockLimits::max_pdiscard 64bit
  block/io: allow 64bit write-zeroes requests
  block: use int64_t instead of int in driver write_zeroes handlers
  block: make BlockLimits::max_pwrite_zeroes 64bit
  block: use int64_t instead of uint64_t in copy_range driver handlers
  block: use int64_t instead of uint64_t in driver write handlers
  block: use int64_t instead of uint64_t in driver read handlers
  qcow2: check request on vmstate save/load path
  block/io: bring request check to bdrv_co_(read,write)v_vmstate
  qemu-nbd: Change default cache mode to writeback

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 years agoMAINTAINERS: Demote sPAPR from "Supported" to "Maintained"
David Gibson [Tue, 21 Sep 2021 04:01:12 +0000 (14:01 +1000)]
MAINTAINERS: Demote sPAPR from "Supported" to "Maintained"

qemu/KVM on Power is no longer my primary job responsibility, nor Greg
Kurz'.  I still have some time for upstream maintenance, but it's no longer
accurate to say that I'm paid to do so.  Therefore, reduce sPAPR (the
"pseries" machine type) from Supported to Maintained.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2 years agoMAINTAINERS: Add information for OpenPIC
David Gibson [Tue, 21 Sep 2021 03:34:35 +0000 (13:34 +1000)]
MAINTAINERS: Add information for OpenPIC

The OpenPIC interrupt controller was once the de facto standard on ppc
machines.  In qemu it's now only used on some Macintosh and the
Freescale e500 machine.  It has no listed maintainer, and as far as I
know, no-one who's really familiar with it any more.

Since I'm moving away from the area, I no longer have capacity to do even
minimal maintenance of it under the auspices of the ppc targets in general.

Therefore, this patch lists the main part of openpic, and marks it as
"Odd Fixes" to be looked after by Mark Cave-Ayland who handles the
Macintosh targets.  The openpic_kvm variant is only used on e500, so
add it to the files for that machine type (itself already Orphaned).

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2 years agoMAINTAINERS: Remove David & Greg as reviewers/co-maintainers of powernv
David Gibson [Tue, 21 Sep 2021 03:20:24 +0000 (13:20 +1000)]
MAINTAINERS: Remove David & Greg as reviewers/co-maintainers of powernv

With our interests moving to other areas, Greg and myself no longer have
capacity to be regular reviewers of code for the powernv machine type, let
alone co-maintainers.  Additionally, not being IBM employees, we don't have
easy access to the hardware information we'd need for good review.

Therefore, remove our names as reviewers and/or co-maintainers of the
powernv machine type, and the related XIVE interrupt controller.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Acked-by: Cédric Le Goater <clg@kaod.org>
2 years agoMAINTAINERS: Orphan obscure ppc platforms
David Gibson [Tue, 21 Sep 2021 03:02:17 +0000 (13:02 +1000)]
MAINTAINERS: Orphan obscure ppc platforms

There are a nunber of old embedded ppc machine types which have been little
changed and in "Odd Fixes" state for a long time.  With both myself and
Greg Kurz moving toward other areas, we no longer have the capacity to
keep reviewing and maintaining even the rare patches that come in for those
platforms.

Therefore, remove our names as reviewers and mark these platforms as
orphaned.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
2 years agoMAINTAINERS: Remove David & Greg as reviewers for a number of boards
David Gibson [Tue, 21 Sep 2021 03:13:45 +0000 (13:13 +1000)]
MAINTAINERS: Remove David & Greg as reviewers for a number of boards

Greg and I are moving towards other areas and no longer have capacity to
act as regular reviewers for several of the secondary ppc machine types.
So, remove ourselves as reviewers for Macintosh, PReP, sam460ex and
pegasos2 in MAINTAINERS.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Acked-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
2 years agoMAINTAINERS: Remove machine specific files from ppc TCG CPUs entry
David Gibson [Mon, 27 Sep 2021 04:17:45 +0000 (14:17 +1000)]
MAINTAINERS: Remove machine specific files from ppc TCG CPUs entry

Currently the PowerPC TCG CPUs entry in MAINTAINERS lists all of hw/ppc/
and include/hw/ppc.  Nearly all the files in those places are related to
specific ppc machine types, rather than to the actual CPUs however.  Those
machine types list their own files separately, often overlapping with this.
For greater clarity, remove these misleading entries from the TCG CPUs
stanza, leaving just hw/ppc/ppc.c and hw/ppc/ppc_booke.c which are the only
ones common to a wide range of PPC TCG cpus each.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>