lkml.org 
[lkml]   [2020]   [May]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 27/30] selftests: kvm: introduce cpu_has_svm() check
Date
From: Vitaly Kuznetsov <vkuznets@redhat.com>

Many tests will want to check if the CPU is Intel or AMD in
guest code, add cpu_has_svm() and put it as static
inline to svm_util.h.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20200529130407.57176-1-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
tools/testing/selftests/kvm/include/x86_64/svm_util.h | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/x86_64/svm_util.h b/tools/testing/selftests/kvm/include/x86_64/svm_util.h
index cd037917fece..b1057773206a 100644
--- a/tools/testing/selftests/kvm/include/x86_64/svm_util.h
+++ b/tools/testing/selftests/kvm/include/x86_64/svm_util.h
@@ -35,4 +35,14 @@ void generic_svm_setup(struct svm_test_data *svm, void *guest_rip, void *guest_r
void run_guest(struct vmcb *vmcb, uint64_t vmcb_gpa);
void nested_svm_check_supported(void);

+static inline bool cpu_has_svm(void)
+{
+ u32 eax = 0x80000001, ecx;
+
+ asm("cpuid" :
+ "=a" (eax), "=c" (ecx) : "0" (eax) : "ebx", "edx");
+
+ return ecx & CPUID_SVM;
+}
+
#endif /* SELFTEST_KVM_SVM_UTILS_H */
--
2.26.2

\
 
 \ /
  Last update: 2020-05-29 17:40    [W:0.405 / U:0.064 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site