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KVM: Drop kvm_reload_remote_mmus(), open code request in x86 users
authorSean Christopherson <seanjc@google.com>
Fri, 25 Feb 2022 18:22:44 +0000 (18:22 +0000)
committerPaolo Bonzini <pbonzini@redhat.com>
Tue, 1 Mar 2022 13:58:25 +0000 (08:58 -0500)
commit2f6f66ccd21e854cd3743bc8def68f8b4e7d91fc
treea9cb92a6733706ed5c4b2aa5d4c3fad5e20b8d50
parentf6d0a2521ce1cc3aea760ea42b43c428e1c98108
KVM: Drop kvm_reload_remote_mmus(), open code request in x86 users

Remove the generic kvm_reload_remote_mmus() and open code its
functionality into the two x86 callers.  x86 is (obviously) the only
architecture that uses the hook, and is also the only architecture that
uses KVM_REQ_MMU_RELOAD in a way that's consistent with the name.  That
will change in a future patch, as x86's usage when zapping a single
shadow page x86 doesn't actually _need_ to reload all vCPUs' MMUs, only
MMUs whose root is being zapped actually need to be reloaded.

s390 also uses KVM_REQ_MMU_RELOAD, but for a slightly different purpose.

Drop the generic code in anticipation of implementing s390 and x86 arch
specific requests, which will allow dropping KVM_REQ_MMU_RELOAD entirely.

Opportunistically reword the x86 TDP MMU comment to avoid making
references to functions (and requests!) when possible, and to remove the
rather ambiguous "this".

No functional change intended.

Cc: Ben Gardon <bgardon@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
Message-Id: <20220225182248.3812651-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/mmu/mmu.c
include/linux/kvm_host.h
virt/kvm/kvm_main.c