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[v7,08/13] KVM: x86: Add Intel processor trace context for each vcpu

Message ID 1525349608-10352-9-git-send-email-luwei.kang@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Luwei Kang May 3, 2018, 12:13 p.m. UTC 
From: Chao Peng <chao.p.peng@linux.intel.com>

Add a data structure to save Intel Processor Trace context.
It mainly include the value of Intel PT host/guest MSRs
and guest CPUID information.

Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
Signed-off-by: Luwei Kang <luwei.kang@intel.com>
---
 arch/x86/kvm/vmx.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
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Patch

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 27cf417..9a5c26d 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -597,6 +597,23 @@  static inline int pi_test_sn(struct pi_desc *pi_desc)
 			(unsigned long *)&pi_desc->control);
 }
 
+struct pt_ctx {
+	u64 ctl;
+	u64 status;
+	u64 output_base;
+	u64 output_mask;
+	u64 cr3_match;
+	u64 addrs[MSR_IA32_RTIT_ADDR_COUNT];
+};
+
+struct pt_desc {
+	u64 ctl_bitmask;
+	u32 range_cnt;
+	u32 caps[PT_CPUID_REGS_NUM * PT_CPUID_LEAVES];
+	struct pt_ctx host;
+	struct pt_ctx guest;
+};
+
 struct vcpu_vmx {
 	struct kvm_vcpu       vcpu;
 	unsigned long         host_rsp;
@@ -693,6 +710,8 @@  struct vcpu_vmx {
 	 */
 	u64 msr_ia32_feature_control;
 	u64 msr_ia32_feature_control_valid_bits;
+
+	struct pt_desc pt_desc;
 };
 
 enum segment_cache_field {