| From | Andy Lutomirski <> | Subject | [PATCH v2 08/14] x86/fault: Skip erratum #93 workaround on new CPUs | Date | Tue, 9 Feb 2021 18:33:40 -0800 |
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Erratum #93 applies to the first generation of AMD K8 CPUs. Skip the workaround on newer CPUs.
Signed-off-by: Andy Lutomirski <luto@kernel.org> --- arch/x86/mm/fault.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index cbb1a9754473..3fe2f4800b69 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -442,9 +442,8 @@ static void dump_pagetable(unsigned long address) */ static int is_errata93(struct pt_regs *regs, unsigned long address) { -#if defined(CONFIG_X86_64) && defined(CONFIG_CPU_SUP_AMD) - if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD - || boot_cpu_data.x86 != 0xf) +#if defined(CONFIG_X86_64) + if (!is_amd_k8_pre_npt()) return 0; if (user_mode(regs)) -- 2.29.2
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