From 481d66325dfc2a6b4f5e729b64ad144383b63fad Mon Sep 17 00:00:00 2001 From: Vitaly Kuznetsov Date: Tue, 14 Mar 2017 18:35:39 +0100 Subject: [PATCH] x86/xen: split off enlighten_pvh.c Create enlighten_pvh.c by splitting off PVH related code from enlighten.c, put it under CONFIG_XEN_PVH. Signed-off-by: Vitaly Kuznetsov Reviewed-by: Juergen Gross Signed-off-by: Juergen Gross --- arch/x86/xen/Makefile | 2 + arch/x86/xen/enlighten.c | 108 ---------------------------------------- arch/x86/xen/enlighten_pvh.c | 114 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 116 insertions(+), 108 deletions(-) create mode 100644 arch/x86/xen/enlighten_pvh.c diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile index cb0164aee156..348128b1c55a 100644 --- a/arch/x86/xen/Makefile +++ b/arch/x86/xen/Makefile @@ -15,6 +15,8 @@ obj-y := enlighten.o setup.o multicalls.o mmu.o irq.o \ grant-table.o suspend.o platform-pci-unplug.o \ p2m.o apic.o pmu.o +obj-$(CONFIG_XEN_PVH) += enlighten_pvh.o + obj-$(CONFIG_EVENT_TRACING) += trace.o obj-$(CONFIG_SMP) += smp.o diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 7b55408ff0ab..2e392e9d83cb 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -180,20 +180,6 @@ struct tls_descs { */ static DEFINE_PER_CPU(struct tls_descs, shadow_tls_desc); -#ifdef CONFIG_XEN_PVH -/* - * PVH variables. - * - * xen_pvh and pvh_bootparams need to live in data segment since they - * are used after startup_{32|64}, which clear .bss, are invoked. - */ -bool xen_pvh __attribute__((section(".data"))) = 0; -struct boot_params pvh_bootparams __attribute__((section(".data"))); - -struct hvm_start_info pvh_start_info; -unsigned int pvh_start_info_sz = sizeof(pvh_start_info); -#endif - static void clamp_max_cpus(void) { #ifdef CONFIG_SMP @@ -1674,100 +1660,6 @@ asmlinkage __visible void __init xen_start_kernel(void) #endif } -#ifdef CONFIG_XEN_PVH - -static void xen_pvh_arch_setup(void) -{ -#ifdef CONFIG_ACPI - /* Make sure we don't fall back to (default) ACPI_IRQ_MODEL_PIC. */ - if (nr_ioapics == 0) - acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM; -#endif -} - -static void __init init_pvh_bootparams(void) -{ - struct xen_memory_map memmap; - unsigned int i; - int rc; - - memset(&pvh_bootparams, 0, sizeof(pvh_bootparams)); - - memmap.nr_entries = ARRAY_SIZE(pvh_bootparams.e820_table); - set_xen_guest_handle(memmap.buffer, pvh_bootparams.e820_table); - rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap); - if (rc) { - xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc); - BUG(); - } - - if (memmap.nr_entries < E820_MAX_ENTRIES_ZEROPAGE - 1) { - pvh_bootparams.e820_table[memmap.nr_entries].addr = - ISA_START_ADDRESS; - pvh_bootparams.e820_table[memmap.nr_entries].size = - ISA_END_ADDRESS - ISA_START_ADDRESS; - pvh_bootparams.e820_table[memmap.nr_entries].type = - E820_TYPE_RESERVED; - memmap.nr_entries++; - } else - xen_raw_printk("Warning: Can fit ISA range into e820\n"); - - pvh_bootparams.e820_entries = memmap.nr_entries; - for (i = 0; i < pvh_bootparams.e820_entries; i++) - e820__range_add(pvh_bootparams.e820_table[i].addr, - pvh_bootparams.e820_table[i].size, - pvh_bootparams.e820_table[i].type); - - e820__update_table(e820_table); - - pvh_bootparams.hdr.cmd_line_ptr = - pvh_start_info.cmdline_paddr; - - /* The first module is always ramdisk. */ - if (pvh_start_info.nr_modules) { - struct hvm_modlist_entry *modaddr = - __va(pvh_start_info.modlist_paddr); - pvh_bootparams.hdr.ramdisk_image = modaddr->paddr; - pvh_bootparams.hdr.ramdisk_size = modaddr->size; - } - - /* - * See Documentation/x86/boot.txt. - * - * Version 2.12 supports Xen entry point but we will use default x86/PC - * environment (i.e. hardware_subarch 0). - */ - pvh_bootparams.hdr.version = 0x212; - pvh_bootparams.hdr.type_of_loader = (9 << 4) | 0; /* Xen loader */ -} - -/* - * This routine (and those that it might call) should not use - * anything that lives in .bss since that segment will be cleared later. - */ -void __init xen_prepare_pvh(void) -{ - u32 msr; - u64 pfn; - - if (pvh_start_info.magic != XEN_HVM_START_MAGIC_VALUE) { - xen_raw_printk("Error: Unexpected magic value (0x%08x)\n", - pvh_start_info.magic); - BUG(); - } - - xen_pvh = 1; - - msr = cpuid_ebx(xen_cpuid_base() + 2); - pfn = __pa(hypercall_page); - wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32)); - - init_pvh_bootparams(); - - x86_init.oem.arch_setup = xen_pvh_arch_setup; -} -#endif - void __ref xen_hvm_init_shared_info(void) { int cpu; diff --git a/arch/x86/xen/enlighten_pvh.c b/arch/x86/xen/enlighten_pvh.c new file mode 100644 index 000000000000..a4272c8620ce --- /dev/null +++ b/arch/x86/xen/enlighten_pvh.c @@ -0,0 +1,114 @@ +#include + +#include + +#include +#include +#include + +#include +#include + +#include +#include + +/* + * PVH variables. + * + * xen_pvh and pvh_bootparams need to live in data segment since they + * are used after startup_{32|64}, which clear .bss, are invoked. + */ +bool xen_pvh __attribute__((section(".data"))) = 0; +struct boot_params pvh_bootparams __attribute__((section(".data"))); + +struct hvm_start_info pvh_start_info; +unsigned int pvh_start_info_sz = sizeof(pvh_start_info); + +static void xen_pvh_arch_setup(void) +{ + /* Make sure we don't fall back to (default) ACPI_IRQ_MODEL_PIC. */ + if (nr_ioapics == 0) + acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM; +} + +static void __init init_pvh_bootparams(void) +{ + struct xen_memory_map memmap; + unsigned int i; + int rc; + + memset(&pvh_bootparams, 0, sizeof(pvh_bootparams)); + + memmap.nr_entries = ARRAY_SIZE(pvh_bootparams.e820_table); + set_xen_guest_handle(memmap.buffer, pvh_bootparams.e820_table); + rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap); + if (rc) { + xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc); + BUG(); + } + + if (memmap.nr_entries < E820_MAX_ENTRIES_ZEROPAGE - 1) { + pvh_bootparams.e820_table[memmap.nr_entries].addr = + ISA_START_ADDRESS; + pvh_bootparams.e820_table[memmap.nr_entries].size = + ISA_END_ADDRESS - ISA_START_ADDRESS; + pvh_bootparams.e820_table[memmap.nr_entries].type = + E820_TYPE_RESERVED; + memmap.nr_entries++; + } else + xen_raw_printk("Warning: Can fit ISA range into e820\n"); + + pvh_bootparams.e820_entries = memmap.nr_entries; + for (i = 0; i < pvh_bootparams.e820_entries; i++) + e820__range_add(pvh_bootparams.e820_table[i].addr, + pvh_bootparams.e820_table[i].size, + pvh_bootparams.e820_table[i].type); + + e820__update_table(e820_table); + + pvh_bootparams.hdr.cmd_line_ptr = + pvh_start_info.cmdline_paddr; + + /* The first module is always ramdisk. */ + if (pvh_start_info.nr_modules) { + struct hvm_modlist_entry *modaddr = + __va(pvh_start_info.modlist_paddr); + pvh_bootparams.hdr.ramdisk_image = modaddr->paddr; + pvh_bootparams.hdr.ramdisk_size = modaddr->size; + } + + /* + * See Documentation/x86/boot.txt. + * + * Version 2.12 supports Xen entry point but we will use default x86/PC + * environment (i.e. hardware_subarch 0). + */ + pvh_bootparams.hdr.version = 0x212; + pvh_bootparams.hdr.type_of_loader = (9 << 4) | 0; /* Xen loader */ +} + +/* + * This routine (and those that it might call) should not use + * anything that lives in .bss since that segment will be cleared later. + */ +void __init xen_prepare_pvh(void) +{ + u32 msr; + u64 pfn; + + if (pvh_start_info.magic != XEN_HVM_START_MAGIC_VALUE) { + xen_raw_printk("Error: Unexpected magic value (0x%08x)\n", + pvh_start_info.magic); + BUG(); + } + + xen_pvh = 1; + + msr = cpuid_ebx(xen_cpuid_base() + 2); + pfn = __pa(hypercall_page); + wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32)); + + init_pvh_bootparams(); + + x86_init.oem.arch_setup = xen_pvh_arch_setup; +} -- 2.11.0