[PATCH v1 07/11] KVM: x86/pmu: Expose CPUIDs feature bits PDCM, DS, DTES64

[Luwei Kang <luwei.kang@intel.com>]

The CPUID features PDCM, DS and DTES64 are required for PEBS feature.
This patch expose CPUID feature PDCM, DS and DTES64 to guest when PEBS
is supported in KVM.

Originally-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Luwei Kang <luwei.kang@intel.com>
Co-developed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
 arch/x86/include/asm/kvm_host.h |  2 ++
 arch/x86/kvm/cpuid.c            |  9 ++++++---
 arch/x86/kvm/svm.c              | 12 ++++++++++++
 arch/x86/kvm/vmx/capabilities.h | 17 +++++++++++++++++
 arch/x86/kvm/vmx/vmx.c          |  2 ++
 5 files changed, 39 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 83abb49..033d9f9 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1180,6 +1180,8 @@ struct kvm_x86_ops {
 	bool (*umip_emulated)(void);
 	bool (*pt_supported)(void);
 	bool (*pku_supported)(void);
+	bool (*pdcm_supported)(void);
+	bool (*dtes64_supported)(void);
 
 	int (*check_nested_events)(struct kvm_vcpu *vcpu, bool external_intr);
 	void (*request_immediate_exit)(struct kvm_vcpu *vcpu);
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index b1c4694..92dabf3 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -446,6 +446,9 @@ static inline int __do_cpuid_func(struct kvm_cpuid_entry2 *entry, u32 function,
 	unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0;
 	unsigned f_xsaves = kvm_x86_ops->xsaves_supported() ? F(XSAVES) : 0;
 	unsigned f_intel_pt = kvm_x86_ops->pt_supported() ? F(INTEL_PT) : 0;
+	unsigned int f_pdcm = kvm_x86_ops->pdcm_supported() ? F(PDCM) : 0;
+	unsigned int f_ds = kvm_x86_ops->dtes64_supported() ? F(DS) : 0;
+	unsigned int f_dtes64 = kvm_x86_ops->dtes64_supported() ? F(DTES64) : 0;
 
 	/* cpuid 1.edx */
 	const u32 kvm_cpuid_1_edx_x86_features =
@@ -454,7 +457,7 @@ static inline int __do_cpuid_func(struct kvm_cpuid_entry2 *entry, u32 function,
 		F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) |
 		F(MTRR) | F(PGE) | F(MCA) | F(CMOV) |
 		F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLUSH) |
-		0 /* Reserved, DS, ACPI */ | F(MMX) |
+		0 /* Reserved */ | f_ds | 0 /* ACPI */ | F(MMX) |
 		F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) |
 		0 /* HTT, TM, Reserved, PBE */;
 	/* cpuid 0x80000001.edx */
@@ -471,10 +474,10 @@ static inline int __do_cpuid_func(struct kvm_cpuid_entry2 *entry, u32 function,
 	const u32 kvm_cpuid_1_ecx_x86_features =
 		/* NOTE: MONITOR (and MWAIT) are emulated as NOP,
 		 * but *not* advertised to guests via CPUID ! */
-		F(XMM3) | F(PCLMULQDQ) | 0 /* DTES64, MONITOR */ |
+		F(XMM3) | F(PCLMULQDQ) | f_dtes64 | 0 /* MONITOR */ |
 		0 /* DS-CPL, VMX, SMX, EST */ |
 		0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ |
-		F(FMA) | F(CX16) | 0 /* xTPR Update, PDCM */ |
+		F(FMA) | F(CX16) | 0 /* xTPR Update */ | f_pdcm |
 		F(PCID) | 0 /* Reserved, DCA */ | F(XMM4_1) |
 		F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) |
 		0 /* Reserved*/ | F(AES) | F(XSAVE) | 0 /* OSXSAVE */ | F(AVX) |
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 24c0b2b..984ab6c 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -6123,6 +6123,16 @@ static bool svm_pku_supported(void)
 	return false;
 }
 
+static bool svm_pdcm_supported(void)
+{
+	return false;
+}
+
+static bool svm_dtes64_supported(void)
+{
+	return false;
+}
+
 #define PRE_EX(exit)  { .exit_code = (exit), \
 			.stage = X86_ICPT_PRE_EXCEPT, }
 #define POST_EX(exit) { .exit_code = (exit), \
@@ -7485,6 +7495,8 @@ static void svm_pre_update_apicv_exec_ctrl(struct kvm *kvm, bool activate)
 	.umip_emulated = svm_umip_emulated,
 	.pt_supported = svm_pt_supported,
 	.pku_supported = svm_pku_supported,
+	.pdcm_supported = svm_pdcm_supported,
+	.dtes64_supported = svm_dtes64_supported,
 
 	.set_supported_cpuid = svm_set_supported_cpuid,
 
diff --git a/arch/x86/kvm/vmx/capabilities.h b/arch/x86/kvm/vmx/capabilities.h
index f486e26..9e352b5 100644
--- a/arch/x86/kvm/vmx/capabilities.h
+++ b/arch/x86/kvm/vmx/capabilities.h
@@ -5,6 +5,7 @@
 #include <asm/vmx.h>
 
 #include "lapic.h"
+#include "pmu.h"
 
 extern bool __read_mostly enable_vpid;
 extern bool __read_mostly flexpriority_enabled;
@@ -151,6 +152,22 @@ static inline bool vmx_pku_supported(void)
 	return boot_cpu_has(X86_FEATURE_PKU);
 }
 
+static inline bool vmx_pdcm_supported(void)
+{
+	if (kvm_x86_ops->pmu_ops->is_pebs_via_ds_supported)
+		return kvm_x86_ops->pmu_ops->is_pebs_via_ds_supported();
+
+	return false;
+}
+
+static inline bool vmx_dtes64_supported(void)
+{
+	if (kvm_x86_ops->pmu_ops->is_pebs_via_ds_supported)
+		return kvm_x86_ops->pmu_ops->is_pebs_via_ds_supported();
+
+	return false;
+}
+
 static inline bool cpu_has_vmx_rdtscp(void)
 {
 	return vmcs_config.cpu_based_2nd_exec_ctrl &
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 40b1e61..cef7089 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7951,6 +7951,8 @@ static bool vmx_check_apicv_inhibit_reasons(ulong bit)
 	.umip_emulated = vmx_umip_emulated,
 	.pt_supported = vmx_pt_supported,
 	.pku_supported = vmx_pku_supported,
+	.pdcm_supported = vmx_pdcm_supported,
+	.dtes64_supported = vmx_dtes64_supported,
 
 	.request_immediate_exit = vmx_request_immediate_exit,
 
-- 
1.8.3.1