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

Luwei Kang
2018-05-03T12:13:23Z

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(+)

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 {
--
1.8.3.1