x86/speculation: Add RSB VM Exit protections

[mirror_ubuntu-jammy-kernel.git] / tools / arch / x86 / include / asm / msr-index.h

diff --git a/tools/arch/x86/include/asm/msr-index.h b/tools/arch/x86/include/asm/msr-index.h
index ec2967e7249f51a862618f784777cc4f0d3d553f..8f38265bc81dc76a87b7f2b7a3cbf5844f5d2fb7 100644 (file)
--- a/tools/arch/x86/include/asm/msr-index.h
+++ b/tools/arch/x86/include/asm/msr-index.h
@@ -148,6 +148,10 @@
                                                 * are restricted to targets in
                                                 * kernel.
                                                 */
+#define ARCH_CAP_PBRSB_NO              BIT(24) /*
+                                                * Not susceptible to Post-Barrier
+                                                * Return Stack Buffer Predictions.
+                                                */
 
 #define MSR_IA32_FLUSH_CMD             0x0000010b
 #define L1D_FLUSH                      BIT(0)  /*