[PATCH v1 2/3] x86/cpufeatures: Shorten X86_FEATURE_CLEAR_BHB_LOOP_ON_VMEXIT to X86_FEATURE_CLEAR_BHB_LOV
From: Xin Li (Intel)
Date: Tue Apr 15 2025 - 13:55:08 EST
Shorten X86_FEATURE_CLEAR_BHB_LOOP_ON_VMEXIT to X86_FEATURE_CLEAR_BHB_LOV
to make the last column aligned consistently in the whole file.
Suggested-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Signed-off-by: Xin Li (Intel) <xin@xxxxxxxxx>
---
arch/x86/include/asm/cpufeatures.h | 2 +-
arch/x86/include/asm/nospec-branch.h | 2 +-
arch/x86/kernel/cpu/bugs.c | 6 +++---
tools/arch/x86/include/asm/cpufeatures.h | 2 +-
4 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index 60b4a4c00491..78d0fd7dd690 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -476,7 +476,7 @@
#define X86_FEATURE_CLEAR_BHB_LOOP (21*32+ 1) /* Clear branch history at syscall entry using SW loop */
#define X86_FEATURE_BHI_CTRL (21*32+ 2) /* BHI_DIS_S HW control available */
#define X86_FEATURE_CLEAR_BHB_HW (21*32+ 3) /* BHI_DIS_S HW control enabled */
-#define X86_FEATURE_CLEAR_BHB_LOOP_ON_VMEXIT (21*32+ 4) /* Clear branch history at vmexit using SW loop */
+#define X86_FEATURE_CLEAR_BHB_LOV (21*32+ 4) /* Clear branch history at vmexit using SW loop */
#define X86_FEATURE_AMD_FAST_CPPC (21*32+ 5) /* Fast CPPC */
#define X86_FEATURE_AMD_HETEROGENEOUS_CORES (21*32+ 6) /* Heterogeneous Core Topology */
#define X86_FEATURE_AMD_WORKLOAD_CLASS (21*32+ 7) /* Workload Classification */
diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h
index 5c43f145454d..492beefeaf2e 100644
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -327,7 +327,7 @@
.endm
.macro CLEAR_BRANCH_HISTORY_VMEXIT
- ALTERNATIVE "", "call clear_bhb_loop", X86_FEATURE_CLEAR_BHB_LOOP_ON_VMEXIT
+ ALTERNATIVE "", "call clear_bhb_loop", X86_FEATURE_CLEAR_BHB_LOV
.endm
#else
#define CLEAR_BRANCH_HISTORY
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 0e120da17414..0e355f633f77 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -1703,13 +1703,13 @@ static void __init bhi_select_mitigation(void)
if (bhi_mitigation == BHI_MITIGATION_VMEXIT_ONLY) {
pr_info("Spectre BHI mitigation: SW BHB clearing on VM exit only\n");
- setup_force_cpu_cap(X86_FEATURE_CLEAR_BHB_LOOP_ON_VMEXIT);
+ setup_force_cpu_cap(X86_FEATURE_CLEAR_BHB_LOV);
return;
}
pr_info("Spectre BHI mitigation: SW BHB clearing on syscall and VM exit\n");
setup_force_cpu_cap(X86_FEATURE_CLEAR_BHB_LOOP);
- setup_force_cpu_cap(X86_FEATURE_CLEAR_BHB_LOOP_ON_VMEXIT);
+ setup_force_cpu_cap(X86_FEATURE_CLEAR_BHB_LOV);
}
static void __init spectre_v2_select_mitigation(void)
@@ -2852,7 +2852,7 @@ static const char *spectre_bhi_state(void)
!boot_cpu_has(X86_FEATURE_RETPOLINE_LFENCE) &&
rrsba_disabled)
return "; BHI: Retpoline";
- else if (boot_cpu_has(X86_FEATURE_CLEAR_BHB_LOOP_ON_VMEXIT))
+ else if (boot_cpu_has(X86_FEATURE_CLEAR_BHB_LOV))
return "; BHI: Vulnerable, KVM: SW loop";
return "; BHI: Vulnerable";
diff --git a/tools/arch/x86/include/asm/cpufeatures.h b/tools/arch/x86/include/asm/cpufeatures.h
index 44b66945554d..3e04290131d7 100644
--- a/tools/arch/x86/include/asm/cpufeatures.h
+++ b/tools/arch/x86/include/asm/cpufeatures.h
@@ -476,7 +476,7 @@
#define X86_FEATURE_CLEAR_BHB_LOOP (21*32+ 1) /* Clear branch history at syscall entry using SW loop */
#define X86_FEATURE_BHI_CTRL (21*32+ 2) /* BHI_DIS_S HW control available */
#define X86_FEATURE_CLEAR_BHB_HW (21*32+ 3) /* BHI_DIS_S HW control enabled */
-#define X86_FEATURE_CLEAR_BHB_LOOP_ON_VMEXIT (21*32+ 4) /* Clear branch history at vmexit using SW loop */
+#define X86_FEATURE_CLEAR_BHB_LOV (21*32+ 4) /* Clear branch history at vmexit using SW loop */
#define X86_FEATURE_AMD_FAST_CPPC (21*32+ 5) /* Fast CPPC */
#define X86_FEATURE_AMD_HETEROGENEOUS_CORES (21*32+ 6) /* Heterogeneous Core Topology */
#define X86_FEATURE_AMD_WORKLOAD_CLASS (21*32+ 7) /* Workload Classification */
--
2.49.0