Public bug reported: The EPYC-Rome model is missing the IBRS and SSBD flags due to an oversight
https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07378.html They have been added as a EPYC-Rome-v2 in https://lists.gnu.org/archive/html/qemu-devel/2021-03/msg01020.html This patch depends on the IBRS and AMD SSBD definitions that were added as part of the EPYC-Milan patch: https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg03370.html diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 8d599bb5b8..888c3a59e2 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -816,8 +816,12 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS]; #define CPUID_8000_0008_EBX_WBNOINVD (1U << 9) /* Indirect Branch Prediction Barrier */ #define CPUID_8000_0008_EBX_IBPB (1U << 12) +/* Indirect Branch Restricted Speculation */ +#define CPUID_8000_0008_EBX_IBRS (1U << 14) /* Single Thread Indirect Branch Predictors */ #define CPUID_8000_0008_EBX_STIBP (1U << 15) +/* Speculative Store Bypass Disable */ +#define CPUID_8000_0008_EBX_AMD_SSBD (1U << 24) ** Affects: qemu (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1921754 Title: Add missing cpu feature bits in EPYC-Rome model To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1921754/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
