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| author | Joerg Roedel <joerg.roedel@amd.com> | 2010-09-10 17:30:50 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 10:52:36 +0200 |
| commit | 6539e738f65a8f1fc7806295d5d701fba4008343 (patch) | |
| tree | 7b66b9d2c28eae8a332cdb1da0e602357b0cbeda /arch/x86/kvm | |
| parent | 14dfe855f978181cd611ec018e5ceba860a98545 (diff) | |
| download | linux-6539e738f65a8f1fc7806295d5d701fba4008343.tar.bz2 | |
KVM: MMU: Implement nested gva_to_gpa functions
This patch adds the functions to do a nested l2_gva to
l1_gpa page table walk.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 8 | ||||
| -rw-r--r-- | arch/x86/kvm/paging_tmpl.h | 31 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.h | 5 |
3 files changed, 44 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index cb06adac92b1..1e215e8b9377 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2466,6 +2466,14 @@ static gpa_t nonpaging_gva_to_gpa(struct kvm_vcpu *vcpu, gva_t vaddr, return vaddr; } +static gpa_t nonpaging_gva_to_gpa_nested(struct kvm_vcpu *vcpu, gva_t vaddr, + u32 access, u32 *error) +{ + if (error) + *error = 0; + return vcpu->arch.nested_mmu.translate_gpa(vcpu, vaddr, access); +} + static int nonpaging_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code) { diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index a704a8130e44..eefe363156b9 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -276,6 +276,16 @@ static int FNAME(walk_addr)(struct guest_walker *walker, write_fault, user_fault, fetch_fault); } +static int FNAME(walk_addr_nested)(struct guest_walker *walker, + struct kvm_vcpu *vcpu, gva_t addr, + int write_fault, int user_fault, + int fetch_fault) +{ + return FNAME(walk_addr_generic)(walker, vcpu, &vcpu->arch.nested_mmu, + addr, write_fault, user_fault, + fetch_fault); +} + static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, u64 *spte, const void *pte) { @@ -660,6 +670,27 @@ static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr, u32 access, return gpa; } +static gpa_t FNAME(gva_to_gpa_nested)(struct kvm_vcpu *vcpu, gva_t vaddr, + u32 access, u32 *error) +{ + struct guest_walker walker; + gpa_t gpa = UNMAPPED_GVA; + int r; + + r = FNAME(walk_addr_nested)(&walker, vcpu, vaddr, + access & PFERR_WRITE_MASK, + access & PFERR_USER_MASK, + access & PFERR_FETCH_MASK); + + if (r) { + gpa = gfn_to_gpa(walker.gfn); + gpa |= vaddr & ~PAGE_MASK; + } else if (error) + *error = walker.error_code; + + return gpa; +} + static void FNAME(prefetch_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) { diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index 2d6385e44ccf..bf4dc2f40d7f 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -50,6 +50,11 @@ static inline int is_long_mode(struct kvm_vcpu *vcpu) #endif } +static inline bool mmu_is_nested(struct kvm_vcpu *vcpu) +{ + return vcpu->arch.walk_mmu == &vcpu->arch.nested_mmu; +} + static inline int is_pae(struct kvm_vcpu *vcpu) { return kvm_read_cr4_bits(vcpu, X86_CR4_PAE); |