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| author | Gleb Natapov <gleb@redhat.com> | 2013-08-05 11:07:10 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-08-07 15:57:37 +0200 |
| commit | d8089baca4f6895ce9c7bdabd2fca48a23feee79 (patch) | |
| tree | 13affd92aa67ecdefff4b4a94e7241cc960e2913 /arch/x86 | |
| parent | 0ad805a0c326e0a5f4d9b024b27ddde02361e92a (diff) | |
| download | linux-next-d8089baca4f6895ce9c7bdabd2fca48a23feee79.tar.gz | |
nEPT: make guest's A/D bits depends on guest's paging mode
This patch makes guest A/D bits definition to be dependable on paging
mode, so when EPT support will be added it will be able to define them
differently.
Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/paging_tmpl.h | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index b7ab929780cc..83702a68e987 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -32,6 +32,10 @@ #define PT_LVL_OFFSET_MASK(lvl) PT64_LVL_OFFSET_MASK(lvl) #define PT_INDEX(addr, level) PT64_INDEX(addr, level) #define PT_LEVEL_BITS PT64_LEVEL_BITS + #define PT_GUEST_ACCESSED_MASK PT_ACCESSED_MASK + #define PT_GUEST_DIRTY_MASK PT_DIRTY_MASK + #define PT_GUEST_DIRTY_SHIFT PT_DIRTY_SHIFT + #define PT_GUEST_ACCESSED_SHIFT PT_ACCESSED_SHIFT #ifdef CONFIG_X86_64 #define PT_MAX_FULL_LEVELS 4 #define CMPXCHG cmpxchg @@ -49,6 +53,10 @@ #define PT_INDEX(addr, level) PT32_INDEX(addr, level) #define PT_LEVEL_BITS PT32_LEVEL_BITS #define PT_MAX_FULL_LEVELS 2 + #define PT_GUEST_ACCESSED_MASK PT_ACCESSED_MASK + #define PT_GUEST_DIRTY_MASK PT_DIRTY_MASK + #define PT_GUEST_DIRTY_SHIFT PT_DIRTY_SHIFT + #define PT_GUEST_ACCESSED_SHIFT PT_ACCESSED_SHIFT #define CMPXCHG cmpxchg #else #error Invalid PTTYPE value @@ -88,7 +96,8 @@ static inline void FNAME(protect_clean_gpte)(unsigned *access, unsigned gpte) mask = (unsigned)~ACC_WRITE_MASK; /* Allow write access to dirty gptes */ - mask |= (gpte >> (PT_DIRTY_SHIFT - PT_WRITABLE_SHIFT)) & PT_WRITABLE_MASK; + mask |= (gpte >> (PT_GUEST_DIRTY_SHIFT - PT_WRITABLE_SHIFT)) & + PT_WRITABLE_MASK; *access &= mask; } @@ -138,7 +147,7 @@ static bool FNAME(prefetch_invalid_gpte)(struct kvm_vcpu *vcpu, if (!FNAME(is_present_gpte)(gpte)) goto no_present; - if (!(gpte & PT_ACCESSED_MASK)) + if (!(gpte & PT_GUEST_ACCESSED_MASK)) goto no_present; return false; @@ -174,14 +183,14 @@ static int FNAME(update_accessed_dirty_bits)(struct kvm_vcpu *vcpu, table_gfn = walker->table_gfn[level - 1]; ptep_user = walker->ptep_user[level - 1]; index = offset_in_page(ptep_user) / sizeof(pt_element_t); - if (!(pte & PT_ACCESSED_MASK)) { + if (!(pte & PT_GUEST_ACCESSED_MASK)) { trace_kvm_mmu_set_accessed_bit(table_gfn, index, sizeof(pte)); - pte |= PT_ACCESSED_MASK; + pte |= PT_GUEST_ACCESSED_MASK; } if (level == walker->level && write_fault && - !(pte & PT_DIRTY_MASK)) { + !(pte & PT_GUEST_DIRTY_MASK)) { trace_kvm_mmu_set_dirty_bit(table_gfn, index, sizeof(pte)); - pte |= PT_DIRTY_MASK; + pte |= PT_GUEST_DIRTY_MASK; } if (pte == orig_pte) continue; @@ -235,7 +244,7 @@ retry_walk: ASSERT((!is_long_mode(vcpu) && is_pae(vcpu)) || (mmu->get_cr3(vcpu) & CR3_NONPAE_RESERVED_BITS) == 0); - accessed_dirty = PT_ACCESSED_MASK; + accessed_dirty = PT_GUEST_ACCESSED_MASK; pt_access = pte_access = ACC_ALL; ++walker->level; @@ -310,7 +319,8 @@ retry_walk: * On a write fault, fold the dirty bit into accessed_dirty by * shifting it one place right. */ - accessed_dirty &= pte >> (PT_DIRTY_SHIFT - PT_ACCESSED_SHIFT); + accessed_dirty &= pte >> + (PT_GUEST_DIRTY_SHIFT - PT_GUEST_ACCESSED_SHIFT); if (unlikely(!accessed_dirty)) { ret = FNAME(update_accessed_dirty_bits)(vcpu, mmu, walker, write_fault); @@ -886,3 +896,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) #undef gpte_to_gfn #undef gpte_to_gfn_lvl #undef CMPXCHG +#undef PT_GUEST_ACCESSED_MASK +#undef PT_GUEST_DIRTY_MASK +#undef PT_GUEST_DIRTY_SHIFT +#undef PT_GUEST_ACCESSED_SHIFT |