x86/speculation/mds: Add basic bug infrastructure for MDS

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

diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 769b6f72ec50620baabe69fc7a29b99bd61267de..7ca92f9b5eae7bef36b62790af33f7c9c2b1fae5 100644 (file)
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -79,6 +79,11 @@
                                                 * attack, so no Speculative Store Bypass
                                                 * control required.
                                                 */
+#define ARCH_CAP_MDS_NO                        BIT(5)   /*
+                                                 * Not susceptible to
+                                                 * Microarchitectural Data
+                                                 * Sampling (MDS) vulnerabilities.
+                                                 */
 
 #define MSR_IA32_FLUSH_CMD             0x0000010b
 #define L1D_FLUSH                      BIT(0)  /*