[PATCH kvm-unit-tests 2/3] SVM: Add a helpter function for checking if PAT is supported by the VCPU

[Krish Sadhukhan <krish.sadhukhan@xxxxxxxxxx>]

Signed-off-by: Krish Sadhukhan <krish.sadhukhan@xxxxxxxxxx>
---
 lib/x86/processor.h | 1 +
 x86/svm.c           | 5 +++++
 x86/svm.h           | 1 +
 3 files changed, 7 insertions(+)

diff --git a/lib/x86/processor.h b/lib/x86/processor.h
index fe5add5..ad892b7 100644
--- a/lib/x86/processor.h
+++ b/lib/x86/processor.h
@@ -180,6 +180,7 @@ static inline bool is_intel(void)
  * Extended Leafs, a.k.a. AMD defined
  */
 #define	X86_FEATURE_SVM			(CPUID(0x80000001, 0, ECX, 2))
+#define	X86_FEATURE_PAT			(CPUID(0x80000001, 0, EDX, 16))
 #define	X86_FEATURE_NX			(CPUID(0x80000001, 0, EDX, 20))
 #define	X86_FEATURE_GBPAGES		(CPUID(0x80000001, 0, EDX, 26))
 #define	X86_FEATURE_RDTSCP		(CPUID(0x80000001, 0, EDX, 27))
diff --git a/x86/svm.c b/x86/svm.c
index 3f94b2a..d03f011 100644
--- a/x86/svm.c
+++ b/x86/svm.c
@@ -89,6 +89,11 @@ bool npt_supported(void)
 	return this_cpu_has(X86_FEATURE_NPT);
 }
 
+bool pat_supported(void)
+{
+	return this_cpu_has(X86_FEATURE_PAT);
+}
+
 int get_test_stage(struct svm_test *test)
 {
 	barrier();
diff --git a/x86/svm.h b/x86/svm.h
index f74b13a..d4db4c1 100644
--- a/x86/svm.h
+++ b/x86/svm.h
@@ -409,6 +409,7 @@ void default_prepare(struct svm_test *test);
 void default_prepare_gif_clear(struct svm_test *test);
 bool default_finished(struct svm_test *test);
 bool npt_supported(void);
+bool pat_supported(void);
 int get_test_stage(struct svm_test *test);
 void set_test_stage(struct svm_test *test, int s);
 void inc_test_stage(struct svm_test *test);
-- 
2.27.0