On 5/23/24 14:18, Ravi Bangoria wrote:
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 489b0183f37d..dcb5eb00a4f5 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -5308,11 +5308,17 @@ static __init int svm_hardware_setup(void)
nrips = nrips && boot_cpu_has(X86_FEATURE_NRIPS);
+ if (lbrv) {
+ if (!boot_cpu_has(X86_FEATURE_LBRV))
+ lbrv = false;
+ else
+ pr_info("LBR virtualization supported\n");
+ }
/*
* Note, SEV setup consumes npt_enabled and enable_mmio_caching (which
* may be modified by svm_adjust_mmio_mask()), as well as nrips.
*/
Since it consumes nrips, just make lbrv non-static:
/* enable/disable Next RIP Save */
int nrips = true;
module_param(nrips, int, 0444);
Paolo