diff options
Diffstat (limited to 'debian/patches/bugfix/x86/KVM-x86-Export-RFDS_NO-and-RFDS_CLEAR-to-guests.patch')
| -rw-r--r-- | debian/patches/bugfix/x86/KVM-x86-Export-RFDS_NO-and-RFDS_CLEAR-to-guests.patch | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/debian/patches/bugfix/x86/KVM-x86-Export-RFDS_NO-and-RFDS_CLEAR-to-guests.patch b/debian/patches/bugfix/x86/KVM-x86-Export-RFDS_NO-and-RFDS_CLEAR-to-guests.patch deleted file mode 100644 index 13a5c96a4..000000000 --- a/debian/patches/bugfix/x86/KVM-x86-Export-RFDS_NO-and-RFDS_CLEAR-to-guests.patch +++ /dev/null @@ -1,48 +0,0 @@ -From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> -Date: Mon, 11 Mar 2024 12:29:43 -0700 -Subject: KVM/x86: Export RFDS_NO and RFDS_CLEAR to guests -Origin: https://git.kernel.org/linus/2a0180129d726a4b953232175857d442651b55a0 - -Mitigation for RFDS requires RFDS_CLEAR capability which is enumerated -by MSR_IA32_ARCH_CAPABILITIES bit 27. If the host has it set, export it -to guests so that they can deploy the mitigation. - -RFDS_NO indicates that the system is not vulnerable to RFDS, export it -to guests so that they don't deploy the mitigation unnecessarily. When -the host is not affected by X86_BUG_RFDS, but has RFDS_NO=0, synthesize -RFDS_NO to the guest. - -Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> -Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> -Reviewed-by: Thomas Gleixner <tglx@linutronix.de> -Acked-by: Josh Poimboeuf <jpoimboe@kernel.org> ---- - arch/x86/kvm/x86.c | 5 ++++- - 1 file changed, 4 insertions(+), 1 deletion(-) - -diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c -index 48a61d283406..68fdf3ba031a 100644 ---- a/arch/x86/kvm/x86.c -+++ b/arch/x86/kvm/x86.c -@@ -1623,7 +1623,8 @@ static bool kvm_is_immutable_feature_msr(u32 msr) - ARCH_CAP_SKIP_VMENTRY_L1DFLUSH | ARCH_CAP_SSB_NO | ARCH_CAP_MDS_NO | \ - ARCH_CAP_PSCHANGE_MC_NO | ARCH_CAP_TSX_CTRL_MSR | ARCH_CAP_TAA_NO | \ - ARCH_CAP_SBDR_SSDP_NO | ARCH_CAP_FBSDP_NO | ARCH_CAP_PSDP_NO | \ -- ARCH_CAP_FB_CLEAR | ARCH_CAP_RRSBA | ARCH_CAP_PBRSB_NO | ARCH_CAP_GDS_NO) -+ ARCH_CAP_FB_CLEAR | ARCH_CAP_RRSBA | ARCH_CAP_PBRSB_NO | ARCH_CAP_GDS_NO | \ -+ ARCH_CAP_RFDS_NO | ARCH_CAP_RFDS_CLEAR) - - static u64 kvm_get_arch_capabilities(void) - { -@@ -1655,6 +1656,8 @@ static u64 kvm_get_arch_capabilities(void) - data |= ARCH_CAP_SSB_NO; - if (!boot_cpu_has_bug(X86_BUG_MDS)) - data |= ARCH_CAP_MDS_NO; -+ if (!boot_cpu_has_bug(X86_BUG_RFDS)) -+ data |= ARCH_CAP_RFDS_NO; - - if (!boot_cpu_has(X86_FEATURE_RTM)) { - /* --- -2.43.0 - |