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| author | Avi Kivity <avi@redhat.com> | 2009-12-29 18:43:06 +0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2010-03-01 12:35:50 -0300 |
| commit | e8467fda83cdc9de53972fee0cd2e6916cf66f41 (patch) | |
| tree | 3a1644bf9b26f29eee74614f70e9d9a82c079ea9 | |
| parent | 4d4ec0874583b127caac1d0f84033c8971b2fd2a (diff) | |
| download | linux-e8467fda83cdc9de53972fee0cd2e6916cf66f41.tar.gz linux-e8467fda83cdc9de53972fee0cd2e6916cf66f41.tar.bz2 linux-e8467fda83cdc9de53972fee0cd2e6916cf66f41.zip | |
KVM: VMX: Allow the guest to own some cr0 bits
We will use this later to give the guest ownership of cr0.ts.
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 2 | ||||
| -rw-r--r-- | arch/x86/kvm/kvm_cache_regs.h | 2 | ||||
| -rw-r--r-- | arch/x86/kvm/svm.c | 5 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx.c | 9 |
4 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index a4de557ad733..693046a7a12d 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -269,6 +269,7 @@ struct kvm_vcpu_arch { u32 regs_dirty; unsigned long cr0; + unsigned long cr0_guest_owned_bits; unsigned long cr2; unsigned long cr3; unsigned long cr4; @@ -489,6 +490,7 @@ struct kvm_x86_ops { void (*set_segment)(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); + void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu); void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu); void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); diff --git a/arch/x86/kvm/kvm_cache_regs.h b/arch/x86/kvm/kvm_cache_regs.h index f46859751b30..6b419a36cbd9 100644 --- a/arch/x86/kvm/kvm_cache_regs.h +++ b/arch/x86/kvm/kvm_cache_regs.h @@ -40,6 +40,8 @@ static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index) static inline ulong kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask) { + if (mask & vcpu->arch.cr0_guest_owned_bits) + kvm_x86_ops->decache_cr0_guest_bits(vcpu); return vcpu->arch.cr0 & mask; } diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index d3246ce70ae8..3899c2d19830 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -956,6 +956,10 @@ static void svm_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) svm->vmcb->save.gdtr.base = dt->base ; } +static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) +{ +} + static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) { } @@ -2948,6 +2952,7 @@ static struct kvm_x86_ops svm_x86_ops = { .set_segment = svm_set_segment, .get_cpl = svm_get_cpl, .get_cs_db_l_bits = kvm_get_cs_db_l_bits, + .decache_cr0_guest_bits = svm_decache_cr0_guest_bits, .decache_cr4_guest_bits = svm_decache_cr4_guest_bits, .set_cr0 = svm_set_cr0, .set_cr3 = svm_set_cr3, diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 4c7177c489ac..dbcdb55094f7 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1653,6 +1653,14 @@ static void vmx_flush_tlb(struct kvm_vcpu *vcpu) ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa)); } +static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) +{ + ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits; + + vcpu->arch.cr0 &= ~cr0_guest_owned_bits; + vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits; +} + static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) { ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits; @@ -4106,6 +4114,7 @@ static struct kvm_x86_ops vmx_x86_ops = { .set_segment = vmx_set_segment, .get_cpl = vmx_get_cpl, .get_cs_db_l_bits = vmx_get_cs_db_l_bits, + .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits, .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, .set_cr0 = vmx_set_cr0, .set_cr3 = vmx_set_cr3, |