From: Andy Lutomirski <luto@kernel.org>
To: x86@kernel.org
Cc: LKML <linux-kernel@vger.kernel.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Yonghong Song <yhs@fb.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Andy Lutomirski <luto@kernel.org>
Subject: [PATCH v2 08/14] x86/fault: Skip erratum #93 workaround on new CPUs
Date: Tue, 9 Feb 2021 18:33:40 -0800 [thread overview]
Message-ID: <8969c688ee663e99901cf4b0383bc6662ce79707.1612924255.git.luto@kernel.org> (raw)
In-Reply-To: <cover.1612924255.git.luto@kernel.org>
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
next prev parent reply other threads:[~2021-02-10 2:40 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-10 2:33 [PATCH v2 00/14] x86/fault: #PF improvements, mostly related to USER bit Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 01/14] x86/fault: Fix AMD erratum #91 errata fixup for user code Andy Lutomirski
2021-02-10 7:34 ` Christoph Hellwig
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 02/14] x86/fault: Skip the AMD erratum #91 workaround on unaffected CPUs Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 03/14] x86/fault: Fold mm_fault_error() into do_user_addr_fault() Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 04/14] x86/fault/32: Move is_f00f_bug() to do_kern_addr_fault() Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 05/14] x86/fault: Document the locking in the fault_signal_pending() path Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 06/14] x86/fault: Correct a few user vs kernel checks wrt WRUSS Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 07/14] x86/fault: Improve kernel-executing-user-memory handling Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` Andy Lutomirski [this message]
2021-02-10 6:06 ` [PATCH v2 08/14] x86/fault: Skip erratum #93 workaround on new CPUs Andy Lutomirski
2021-02-10 13:29 ` Borislav Petkov
2021-02-10 16:09 ` Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 09/14] x86/fault: Split the OOPS code out from no_context() Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 10/14] x86/fault: Bypass no_context() for implicit kernel faults from usermode Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 11/14] x86/fault: Rename no_context() to kernelmode_fixup_or_oops() Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 12/14] x86/fault: Don't look for extable entries for SMEP violations Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 13/14] x86/fault: Don't run fixups for SMAP violations Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] " tip-bot2 for Andy Lutomirski
2021-02-10 2:33 ` [PATCH v2 14/14] x86/fault, x86/efi: Fix and rename efi_recover_from_page_fault() Andy Lutomirski
2021-02-10 17:45 ` [tip: x86/mm] x86/{fault,efi}: " tip-bot2 for Andy Lutomirski
2021-02-11 8:38 ` [PATCH v2 14/14] x86/fault, x86/efi: " Ard Biesheuvel
2021-02-10 13:57 ` [RFC][PATCH] kprobes: Remove kprobe::fault_handler Peter Zijlstra
2021-02-10 19:09 ` Christoph Hellwig
2021-02-10 19:47 ` Alexei Starovoitov
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