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authorSheng Yang <sheng@linux.intel.com>2010-01-05 19:02:29 +0800
committerMarcelo Tosatti <mtosatti@redhat.com>2010-03-01 12:35:46 -0300
commit878403b788bff1af9c7f1a61e104f0c77115af29 (patch)
treead25143de372db159aec0734e049050f2b72b128
parent17cc393596823f4bbab81e68a9e23e7beadbcfca (diff)
KVM: VMX: Enable EPT 1GB page support
Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
-rw-r--r--arch/x86/include/asm/vmx.h1
-rw-r--r--arch/x86/kvm/mmu.c8
-rw-r--r--arch/x86/kvm/vmx.c11
3 files changed, 16 insertions, 4 deletions
diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index 713ed9a5b1d..43f1e9b4591 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -364,6 +364,7 @@ enum vmcs_field {
#define VMX_EPTP_UC_BIT (1ull << 8)
#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_EXTENT_INDIVIDUAL_BIT (1ull << 24)
#define VMX_EPT_EXTENT_CONTEXT_BIT (1ull << 25)
#define VMX_EPT_EXTENT_GLOBAL_BIT (1ull << 26)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 12ccf14f853..4f5508c3510 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -500,8 +500,7 @@ out:
static int mapping_level(struct kvm_vcpu *vcpu, gfn_t large_gfn)
{
struct kvm_memory_slot *slot;
- int host_level;
- int level = PT_PAGE_TABLE_LEVEL;
+ int host_level, level, max_level;
slot = gfn_to_memslot(vcpu->kvm, large_gfn);
if (slot && slot->dirty_bitmap)
@@ -512,7 +511,10 @@ static int mapping_level(struct kvm_vcpu *vcpu, gfn_t large_gfn)
if (host_level == PT_PAGE_TABLE_LEVEL)
return host_level;
- for (level = PT_DIRECTORY_LEVEL; level <= host_level; ++level)
+ max_level = kvm_x86_ops->get_lpage_level() < host_level ?
+ kvm_x86_ops->get_lpage_level() : host_level;
+
+ for (level = PT_DIRECTORY_LEVEL; level <= max_level; ++level)
if (has_wrprotected_page(vcpu->kvm, large_gfn, level))
break;
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 0fd0892553e..9b197b25b66 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -318,6 +318,11 @@ static inline bool cpu_has_vmx_ept_2m_page(void)
return !!(vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT);
}
+static inline bool cpu_has_vmx_ept_1g_page(void)
+{
+ return !!(vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT);
+}
+
static inline int cpu_has_vmx_invept_individual_addr(void)
{
return !!(vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT);
@@ -4038,7 +4043,11 @@ static const struct trace_print_flags vmx_exit_reasons_str[] = {
static int vmx_get_lpage_level(void)
{
- return PT_DIRECTORY_LEVEL;
+ if (enable_ept && !cpu_has_vmx_ept_1g_page())
+ return PT_DIRECTORY_LEVEL;
+ else
+ /* For shadow and EPT supported 1GB page */
+ return PT_PDPE_LEVEL;
}
static inline u32 bit(int bitno)