This is a note to let you know that I've just added the patch titled x86/common: Stamp out the stepping madness to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: x86-common-stamp-out-the-stepping-madness.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From stable-owner@xxxxxxxxxxxxxxx Thu Nov 17 10:22:37 2022 From: Suleiman Souhlal <suleiman@xxxxxxxxxx> Date: Thu, 17 Nov 2022 18:19:46 +0900 Subject: x86/common: Stamp out the stepping madness To: stable@xxxxxxxxxxxxxxx Cc: x86@xxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, bp@xxxxxxxxx, pbonzini@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, jpoimboe@xxxxxxxxxx, cascardo@xxxxxxxxxxxxx, surajjs@xxxxxxxxxx, ssouhlal@xxxxxxxxxxx, suleiman@xxxxxxxxxx Message-ID: <20221117091952.1940850-29-suleiman@xxxxxxxxxx> From: Peter Zijlstra <peterz@xxxxxxxxxxxxx> commit 7a05bc95ed1c5a59e47aaade9fb4083c27de9e62 upstream. The whole MMIO/RETBLEED enumeration went overboard on steppings. Get rid of all that and simply use ANY. If a future stepping of these models would not be affected, it had better set the relevant ARCH_CAP_$FOO_NO bit in IA32_ARCH_CAPABILITIES. Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Signed-off-by: Borislav Petkov <bp@xxxxxxx> Acked-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> Signed-off-by: Borislav Petkov <bp@xxxxxxx> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx> Signed-off-by: Suleiman Souhlal <suleiman@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/x86/kernel/cpu/common.c | 38 ++++++++++++++++---------------------- 1 file changed, 16 insertions(+), 22 deletions(-) --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -1043,32 +1043,26 @@ static const struct x86_cpu_id cpu_vuln_ VULNBL_INTEL_STEPPINGS(HASWELL_CORE, X86_STEPPING_ANY, SRBDS), VULNBL_INTEL_STEPPINGS(HASWELL_ULT, X86_STEPPING_ANY, SRBDS), VULNBL_INTEL_STEPPINGS(HASWELL_GT3E, X86_STEPPING_ANY, SRBDS), - VULNBL_INTEL_STEPPINGS(HASWELL_X, BIT(2) | BIT(4), MMIO), - VULNBL_INTEL_STEPPINGS(BROADWELL_XEON_D,X86_STEPPINGS(0x3, 0x5), MMIO), + VULNBL_INTEL_STEPPINGS(HASWELL_X, X86_STEPPING_ANY, MMIO), + VULNBL_INTEL_STEPPINGS(BROADWELL_XEON_D,X86_STEPPING_ANY, MMIO), VULNBL_INTEL_STEPPINGS(BROADWELL_GT3E, X86_STEPPING_ANY, SRBDS), VULNBL_INTEL_STEPPINGS(BROADWELL_X, X86_STEPPING_ANY, MMIO), VULNBL_INTEL_STEPPINGS(BROADWELL_CORE, X86_STEPPING_ANY, SRBDS), - VULNBL_INTEL_STEPPINGS(SKYLAKE_MOBILE, X86_STEPPINGS(0x3, 0x3), SRBDS | MMIO | RETBLEED), - VULNBL_INTEL_STEPPINGS(SKYLAKE_MOBILE, X86_STEPPING_ANY, SRBDS), - VULNBL_INTEL_STEPPINGS(SKYLAKE_X, BIT(3) | BIT(4) | BIT(6) | - BIT(7) | BIT(0xB), MMIO | RETBLEED), - VULNBL_INTEL_STEPPINGS(SKYLAKE_DESKTOP, X86_STEPPINGS(0x3, 0x3), SRBDS | MMIO | RETBLEED), - VULNBL_INTEL_STEPPINGS(SKYLAKE_DESKTOP, X86_STEPPING_ANY, SRBDS), - VULNBL_INTEL_STEPPINGS(KABYLAKE_MOBILE, X86_STEPPINGS(0x9, 0xC), SRBDS | MMIO | RETBLEED), - VULNBL_INTEL_STEPPINGS(KABYLAKE_MOBILE, X86_STEPPINGS(0x0, 0x8), SRBDS), - VULNBL_INTEL_STEPPINGS(KABYLAKE_DESKTOP,X86_STEPPINGS(0x9, 0xD), SRBDS | MMIO | RETBLEED), - VULNBL_INTEL_STEPPINGS(KABYLAKE_DESKTOP,X86_STEPPINGS(0x0, 0x8), SRBDS), - VULNBL_INTEL_STEPPINGS(ICELAKE_MOBILE, X86_STEPPINGS(0x5, 0x5), MMIO | MMIO_SBDS | RETBLEED), - VULNBL_INTEL_STEPPINGS(ICELAKE_XEON_D, X86_STEPPINGS(0x1, 0x1), MMIO), - VULNBL_INTEL_STEPPINGS(ICELAKE_X, X86_STEPPINGS(0x4, 0x6), MMIO), - VULNBL_INTEL_STEPPINGS(COMETLAKE, BIT(2) | BIT(3) | BIT(5), MMIO | MMIO_SBDS | RETBLEED), - VULNBL_INTEL_STEPPINGS(COMETLAKE_L, X86_STEPPINGS(0x1, 0x1), MMIO | MMIO_SBDS | RETBLEED), - VULNBL_INTEL_STEPPINGS(COMETLAKE_L, X86_STEPPINGS(0x0, 0x0), MMIO | RETBLEED), - VULNBL_INTEL_STEPPINGS(LAKEFIELD, X86_STEPPINGS(0x1, 0x1), MMIO | MMIO_SBDS | RETBLEED), - VULNBL_INTEL_STEPPINGS(ROCKETLAKE, X86_STEPPINGS(0x1, 0x1), MMIO | RETBLEED), - VULNBL_INTEL_STEPPINGS(ATOM_TREMONT, X86_STEPPINGS(0x1, 0x1), MMIO | MMIO_SBDS), + VULNBL_INTEL_STEPPINGS(SKYLAKE_MOBILE, X86_STEPPING_ANY, SRBDS | MMIO | RETBLEED), + VULNBL_INTEL_STEPPINGS(SKYLAKE_X, X86_STEPPING_ANY, MMIO | RETBLEED), + VULNBL_INTEL_STEPPINGS(SKYLAKE_DESKTOP, X86_STEPPING_ANY, SRBDS | MMIO | RETBLEED), + VULNBL_INTEL_STEPPINGS(KABYLAKE_MOBILE, X86_STEPPING_ANY, SRBDS | MMIO | RETBLEED), + VULNBL_INTEL_STEPPINGS(KABYLAKE_DESKTOP,X86_STEPPING_ANY, SRBDS | MMIO | RETBLEED), + VULNBL_INTEL_STEPPINGS(ICELAKE_MOBILE, X86_STEPPING_ANY, MMIO | MMIO_SBDS | RETBLEED), + VULNBL_INTEL_STEPPINGS(ICELAKE_XEON_D, X86_STEPPING_ANY, MMIO), + VULNBL_INTEL_STEPPINGS(ICELAKE_X, X86_STEPPING_ANY, MMIO), + VULNBL_INTEL_STEPPINGS(COMETLAKE, X86_STEPPING_ANY, MMIO | MMIO_SBDS | RETBLEED), + VULNBL_INTEL_STEPPINGS(COMETLAKE_L, X86_STEPPING_ANY, MMIO | MMIO_SBDS | RETBLEED), + VULNBL_INTEL_STEPPINGS(LAKEFIELD, X86_STEPPING_ANY, MMIO | MMIO_SBDS | RETBLEED), + VULNBL_INTEL_STEPPINGS(ROCKETLAKE, X86_STEPPING_ANY, MMIO | RETBLEED), + VULNBL_INTEL_STEPPINGS(ATOM_TREMONT, X86_STEPPING_ANY, MMIO | MMIO_SBDS), VULNBL_INTEL_STEPPINGS(ATOM_TREMONT_X, X86_STEPPING_ANY, MMIO), - VULNBL_INTEL_STEPPINGS(ATOM_TREMONT_L, X86_STEPPINGS(0x0, 0x0), MMIO | MMIO_SBDS), + VULNBL_INTEL_STEPPINGS(ATOM_TREMONT_L, X86_STEPPING_ANY, MMIO | MMIO_SBDS), VULNBL_AMD(0x15, RETBLEED), VULNBL_AMD(0x16, RETBLEED), Patches currently in stable-queue which might be from stable-owner@xxxxxxxxxxxxxxx are queue-4.19/x86-speculation-disable-rrsba-behavior.patch queue-4.19/revert-x86-speculation-add-rsb-vm-exit-protections.patch queue-4.19/kvm-vmx-fix-ibrs-handling-after-vmexit.patch queue-4.19/kvm-vmx-prevent-guest-rsb-poisoning-attacks-with-eibrs.patch queue-4.19/x86-cpufeature-add-facility-to-check-for-min-microcode-revisions.patch queue-4.19/x86-bugs-keep-a-per-cpu-ia32_spec_ctrl-value.patch queue-4.19/x86-cpu-amd-enumerate-btc_no.patch queue-4.19/x86-speculation-fix-firmware-entry-spec_ctrl-handling.patch queue-4.19/x86-speculation-add-spectre_v2-ibrs-option-to-support-kernel-ibrs.patch queue-4.19/x86-cpu-add-consistent-cpu-match-macros.patch queue-4.19/x86-speculation-remove-x86_spec_ctrl_mask.patch queue-4.19/x86-bugs-add-cannon-lake-to-retbleed-affected-cpu-list.patch queue-4.19/x86-bugs-warn-when-ibrs-mitigation-is-selected-on-enhanced-ibrs-parts.patch queue-4.19/x86-speculation-fill-rsb-on-vmexit-for-ibrs.patch queue-4.19/x86-cpu-add-a-steppings-field-to-struct-x86_cpu_id.patch queue-4.19/x86-common-stamp-out-the-stepping-madness.patch queue-4.19/x86-bugs-split-spectre_v2_select_mitigation-and-spectre_v2_user_select_mitigation.patch queue-4.19/x86-bugs-report-intel-retbleed-vulnerability.patch queue-4.19/x86-speculation-change-fill_return_buffer-to-work-with-objtool.patch queue-4.19/x86-cpufeatures-move-retpoline-flags-to-word-11.patch queue-4.19/x86-speculation-fix-spec_ctrl-write-on-smt-state-change.patch queue-4.19/x86-bugs-optimize-spec_ctrl-msr-writes.patch queue-4.19/x86-bugs-report-amd-retbleed-vulnerability.patch queue-4.19/x86-speculation-fix-rsb-filling-with-config_retpoline-n.patch queue-4.19/x86-cpufeature-fix-various-quality-problems-in-the-asm-cpu_device_hd.h-header.patch queue-4.19/intel_idle-disable-ibrs-during-long-idle.patch queue-4.19/x86-speculation-use-declare_per_cpu-for-x86_spec_ctrl_current.patch queue-4.19/x86-entry-remove-skip_r11rcx.patch queue-4.19/x86-speculation-use-cached-host-spec_ctrl-value-for-guest-entry-exit.patch queue-4.19/x86-devicetable-move-x86-specific-macro-out-of-generic-code.patch queue-4.19/x86-bugs-add-amd-retbleed-boot-parameter.patch queue-4.19/x86-entry-add-kernel-ibrs-implementation.patch queue-4.19/revert-x86-cpu-add-a-steppings-field-to-struct-x86_cpu_id.patch queue-4.19/x86-speculation-add-rsb-vm-exit-protections.patch