x86/speculation: Add RSB VM Exit protections

[mirror_ubuntu-jammy-kernel.git] / arch / x86 / include / asm / cpufeatures.h

diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index fd3487bb17990a4096dcfda4863fb78ba42875a0..8689a9773b01b4ac71f68ec9fac444dc3a98ed84 100644 (file)
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -302,6 +302,7 @@
 #define X86_FEATURE_RETHUNK            (11*32+14) /* "" Use REturn THUNK */
 #define X86_FEATURE_UNRET              (11*32+15) /* "" AMD BTB untrain return */
 #define X86_FEATURE_USE_IBPB_FW                (11*32+16) /* "" Use IBPB during runtime firmware calls */
+#define X86_FEATURE_RSB_VMEXIT_LITE    (11*32+17) /* "" Fill RSB on VM exit when EIBRS is enabled */
 
 /* Intel-defined CPU features, CPUID level 0x00000007:1 (EAX), word 12 */
 #define X86_FEATURE_AVX_VNNI           (12*32+ 4) /* AVX VNNI instructions */
@@ -451,5 +452,6 @@
 #define X86_BUG_SRBDS                  X86_BUG(24) /* CPU may leak RNG bits if not mitigated */
 #define X86_BUG_MMIO_STALE_DATA                X86_BUG(25) /* CPU is affected by Processor MMIO Stale Data vulnerabilities */
 #define X86_BUG_RETBLEED               X86_BUG(26) /* CPU is affected by RETBleed */
+#define X86_BUG_EIBRS_PBRSB            X86_BUG(27) /* EIBRS is vulnerable to Post Barrier RSB Predictions */
 
 #endif /* _ASM_X86_CPUFEATURES_H */