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| author | Nadav Har'El <nyh@il.ibm.com> | 2013-08-05 11:07:17 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-08-07 15:57:42 +0200 |
| commit | bfd0a56b90005f8c8a004baf407ad90045c2b11e (patch) | |
| tree | c1e3a6e26b119d1c818deb4ae5079fd2676855bc /arch/x86/include/asm | |
| parent | 155a97a3d7c78b46cef6f1a973c831bc5a4f82bb (diff) | |
| download | talos-obmc-linux-bfd0a56b90005f8c8a004baf407ad90045c2b11e.tar.gz talos-obmc-linux-bfd0a56b90005f8c8a004baf407ad90045c2b11e.zip | |
nEPT: Nested INVEPT
If we let L1 use EPT, we should probably also support the INVEPT instruction.
In our current nested EPT implementation, when L1 changes its EPT table
for L2 (i.e., EPT12), L0 modifies the shadow EPT table (EPT02), and in
the course of this modification already calls INVEPT. But if last level
of shadow page is unsync not all L1's changes to EPT12 are intercepted,
which means roots need to be synced when L1 calls INVEPT. Global INVEPT
should not be different since roots are synced by kvm_mmu_load() each
time EPTP02 changes.
Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Jun Nakajima <jun.nakajima@intel.com>
Signed-off-by: Xinhao Xu <xinhao.xu@intel.com>
Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/vmx.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h index f3e01a2cbaa1..966502d4682e 100644 --- a/arch/x86/include/asm/vmx.h +++ b/arch/x86/include/asm/vmx.h @@ -387,6 +387,7 @@ enum vmcs_field { #define VMX_EPT_EXTENT_INDIVIDUAL_ADDR 0 #define VMX_EPT_EXTENT_CONTEXT 1 #define VMX_EPT_EXTENT_GLOBAL 2 +#define VMX_EPT_EXTENT_SHIFT 24 #define VMX_EPT_EXECUTE_ONLY_BIT (1ull) #define VMX_EPT_PAGE_WALK_4_BIT (1ull << 6) @@ -394,6 +395,7 @@ enum vmcs_field { #define VMX_EPTP_WB_BIT (1ull << 14) #define VMX_EPT_2MB_PAGE_BIT (1ull << 16) #define VMX_EPT_1GB_PAGE_BIT (1ull << 17) +#define VMX_EPT_INVEPT_BIT (1ull << 20) #define VMX_EPT_AD_BIT (1ull << 21) #define VMX_EPT_EXTENT_CONTEXT_BIT (1ull << 25) #define VMX_EPT_EXTENT_GLOBAL_BIT (1ull << 26) |
