[PATCH v3 13/18] x86/virt: KVM: Open code cpu_has_svm() into kvm_is_svm_supported()

Sean Christopherson
2023-05-12T23:52:15Z

Fold the guts of cpu_has_svm() into kvm_is_svm_supported(), its sole
remaining user.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/include/asm/virtext.h | 28 ----------------------------
arch/x86/kvm/svm/svm.c | 11 ++++++++---
2 files changed, 8 insertions(+), 31 deletions(-)

diff --git a/arch/x86/include/asm/virtext.h b/arch/x86/include/asm/virtext.h
index be50c414efe4..632575e257d8 100644
--- a/arch/x86/include/asm/virtext.h
+++ b/arch/x86/include/asm/virtext.h
@@ -22,35 +22,7 @@
/*
* SVM functions:
*/
-
-/** Check if the CPU has SVM support
- *
- * You can use the 'msg' arg to get a message describing the problem,
- * if the function returns zero. Simply pass NULL if you are not interested
- * on the messages; gcc should take care of not generating code for
- * the messages on this case.
- */
-static inline int cpu_has_svm(const char **msg)
-{
- if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD &&
- boot_cpu_data.x86_vendor != X86_VENDOR_HYGON) {
- if (msg)
- *msg = "not amd or hygon";
- return 0;
- }
-
- if (!boot_cpu_has(X86_FEATURE_SVM)) {
- if (msg)
- *msg = "svm not available";
- return 0;
- }
- return 1;
-}
-
-
/** Disable SVM on the current CPU
- *
- * You should call this only if cpu_has_svm() returned true.
*/
static inline void cpu_svm_disable(void)
{
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 0f0d04900bf2..b347173b4e29 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -526,11 +526,16 @@ static void svm_init_osvw(struct kvm_vcpu *vcpu)
static bool kvm_is_svm_supported(void)
{
int cpu = raw_smp_processor_id();
- const char *msg;
u64 vm_cr;

- if (!cpu_has_svm(&msg)) {
- pr_err("SVM not supported by CPU %d, %s\n", cpu, msg);
+ if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD &&
+ boot_cpu_data.x86_vendor != X86_VENDOR_HYGON) {
+ pr_err("CPU %d isn't AMD or Hygon\n", cpu);
+ return false;
+ }
+
+ if (!boot_cpu_has(X86_FEATURE_SVM)) {
+ pr_err("SVM not supported by CPU %d\n", cpu);
return false;
}

--
2.40.1.606.ga4b1b128d6-goog