On 3/28/2023 1:02 PM, Sean Christopherson wrote:
Add a define for PRED_CMD_IBPB and use it to replace the open coded '1' in
the nVMX library.
What does nVMX mean here?
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
lib/x86/msr.h | 1 +
x86/vmexit.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/lib/x86/msr.h b/lib/x86/msr.h
index c9869be5..29fff553 100644
--- a/lib/x86/msr.h
+++ b/lib/x86/msr.h
@@ -34,6 +34,7 @@
/* Intel MSRs. Some also available on other CPUs */
#define MSR_IA32_SPEC_CTRL 0x00000048
#define MSR_IA32_PRED_CMD 0x00000049
+#define PRED_CMD_IBPB BIT(0)
#define MSR_IA32_PMC0 0x000004c1
#define MSR_IA32_PERFCTR0 0x000000c1
diff --git a/x86/vmexit.c b/x86/vmexit.c
index b1eed8d1..2e8866e1 100644
--- a/x86/vmexit.c
+++ b/x86/vmexit.c
@@ -463,7 +463,7 @@ static int has_spec_ctrl(void)
static void wr_ibpb_msr(void)
{
- wrmsr(MSR_IA32_PRED_CMD, 1);
+ wrmsr(MSR_IA32_PRED_CMD, PRED_CMD_IBPB);
}
static void toggle_cr0_wp(void)
