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KVM: Portability: Move memslot aliases to new struct kvm_arch

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This patches create kvm_arch to hold arch-specific kvm fileds
and moves fields naliases and aliases to kvm_arch.

Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Acked-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Zhang Xiantao 2007-12-14 09:54:20 +08:00 • committed by Avi Kivity
parent 77b4c255af
commit d69fb81f05
3 changed files with 19 additions and 14 deletions
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10
drivers/kvm/kvm.h
View file

@ -25,7 +25,6 @@
#include "x86.h" #include "x86.h"
#define KVM_MAX_VCPUS 4 #define KVM_MAX_VCPUS 4
#define KVM_ALIAS_SLOTS 4
#define KVM_MEMORY_SLOTS 8 #define KVM_MEMORY_SLOTS 8
/* memory slots that does not exposed to userspace */ /* memory slots that does not exposed to userspace */
#define KVM_PRIVATE_MEM_SLOTS 4 #define KVM_PRIVATE_MEM_SLOTS 4
@ -94,12 +93,6 @@ struct kvm_vcpu {
struct kvm_vcpu_arch arch; struct kvm_vcpu_arch arch;
}; };
struct kvm_mem_alias {
gfn_t base_gfn;
unsigned long npages;
gfn_t target_gfn;
};
struct kvm_memory_slot { struct kvm_memory_slot {
gfn_t base_gfn; gfn_t base_gfn;
unsigned long npages; unsigned long npages;
@ -123,8 +116,6 @@ struct kvm_vm_stat {
struct kvm { struct kvm {
struct mutex lock; /* protects everything except vcpus */ struct mutex lock; /* protects everything except vcpus */
struct mm_struct *mm; /* userspace tied to this vm */ struct mm_struct *mm; /* userspace tied to this vm */
int naliases;
struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
int nmemslots; int nmemslots;
struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
KVM_PRIVATE_MEM_SLOTS]; KVM_PRIVATE_MEM_SLOTS];
@ -147,6 +138,7 @@ struct kvm {
unsigned int tss_addr; unsigned int tss_addr;
struct page *apic_access_page; struct page *apic_access_page;
struct kvm_vm_stat stat; struct kvm_vm_stat stat;
struct kvm_arch arch;
}; };
/* The guest did something we don't support. */ /* The guest did something we don't support. */

10
drivers/kvm/x86.c
View file

@ -1191,8 +1191,8 @@ gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
int i; int i;
struct kvm_mem_alias *alias; struct kvm_mem_alias *alias;
for (i = 0; i < kvm->naliases; ++i) { for (i = 0; i < kvm->arch.naliases; ++i) {
alias = &kvm->aliases[i]; alias = &kvm->arch.aliases[i];
if (gfn >= alias->base_gfn if (gfn >= alias->base_gfn
&& gfn < alias->base_gfn + alias->npages) && gfn < alias->base_gfn + alias->npages)
return alias->target_gfn + gfn - alias->base_gfn; return alias->target_gfn + gfn - alias->base_gfn;
@ -1228,15 +1228,15 @@ static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
mutex_lock(&kvm->lock); mutex_lock(&kvm->lock);
p = &kvm->aliases[alias->slot]; p = &kvm->arch.aliases[alias->slot];
p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
p->npages = alias->memory_size >> PAGE_SHIFT; p->npages = alias->memory_size >> PAGE_SHIFT;
p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
for (n = KVM_ALIAS_SLOTS; n > 0; --n) for (n = KVM_ALIAS_SLOTS; n > 0; --n)
if (kvm->aliases[n - 1].npages) if (kvm->arch.aliases[n - 1].npages)
break; break;
kvm->naliases = n; kvm->arch.naliases = n;
kvm_mmu_zap_all(kvm); kvm_mmu_zap_all(kvm);

13
drivers/kvm/x86.h
View file

@ -54,6 +54,8 @@
#define IOPL_SHIFT 12 #define IOPL_SHIFT 12
#define KVM_ALIAS_SLOTS 4
#define KVM_PERMILLE_MMU_PAGES 20 #define KVM_PERMILLE_MMU_PAGES 20
#define KVM_MIN_ALLOC_MMU_PAGES 64 #define KVM_MIN_ALLOC_MMU_PAGES 64
#define KVM_NUM_MMU_PAGES 1024 #define KVM_NUM_MMU_PAGES 1024
@ -255,6 +257,17 @@ struct kvm_vcpu_arch {
struct x86_emulate_ctxt emulate_ctxt; struct x86_emulate_ctxt emulate_ctxt;
}; };
struct kvm_mem_alias {
gfn_t base_gfn;
unsigned long npages;
gfn_t target_gfn;
};
struct kvm_arch{
int naliases;
struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
};
struct kvm_vcpu_stat { struct kvm_vcpu_stat {
u32 pf_fixed; u32 pf_fixed;
u32 pf_guest; u32 pf_guest;