From: Peter Zijlstra <peterz@infradead.org>
To: bpf@vger.kernel.org
Subject: [PATCH bpf-next 15/17] x86,bugs: Unconditionally allow spectre_v2=retpoline,amd
Date: Wed, 27 Oct 2021 10:52:58 +0200 [thread overview]
Message-ID: <20211027085521.072502199@infradead.org> (raw)
In-Reply-To: 20211027085243.008677168@infradead.org
Currently Linux prevents usage of retpoline,amd on !AMD hardware, this
is unfriendly and gets in the way of testing. Remove this restriction.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/x86/kernel/cpu/bugs.c | 7 -------
1 file changed, 7 deletions(-)
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -882,13 +882,6 @@ static enum spectre_v2_mitigation_cmd __
return SPECTRE_V2_CMD_AUTO;
}
- if (cmd == SPECTRE_V2_CMD_RETPOLINE_AMD &&
- boot_cpu_data.x86_vendor != X86_VENDOR_HYGON &&
- boot_cpu_data.x86_vendor != X86_VENDOR_AMD) {
- pr_err("retpoline,amd selected but CPU is not AMD. Switching to AUTO select\n");
- return SPECTRE_V2_CMD_AUTO;
- }
-
spec_v2_print_cond(mitigation_options[i].option,
mitigation_options[i].secure);
return cmd;
next prev parent reply other threads:[~2021-10-27 9:00 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-27 8:52 [PATCH bpf-next 00/17] x86: Rewrite the retpoline rewrite logic Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 01/17] objtool: Handle __sanitize_cov*() tail calls Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 02/17] objtool: Classify symbols Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 03/17] objtool: Explicitly avoid self modifying code in .altinstr_replacement Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 04/17] objtool: Shrink struct instruction Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 05/17] objtool,x86: Replace alternatives with .retpoline_sites Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 06/17] x86/retpoline: Remove unused replacement symbols Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 07/17] x86/asm: Fix register order Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 08/17] x86/asm: Fixup odd GEN-for-each-reg.h usage Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 09/17] x86/retpoline: Move the retpoline thunk declarations to nospec-branch.h Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 10/17] x86/retpoline: Create a retpoline thunk array Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 11/17] x86/alternative: Implement .retpoline_sites support Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 12/17] x86/alternative: Handle Jcc __x86_indirect_thunk_\reg Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 13/17] x86/alternative: Try inline spectre_v2=retpoline,amd Peter Zijlstra
2021-10-27 8:52 ` [PATCH bpf-next 14/17] x86/alternative: Add debug prints to apply_retpolines() Peter Zijlstra
2021-10-27 8:52 ` Peter Zijlstra [this message]
2021-10-27 8:52 ` [PATCH bpf-next 16/17] bpf, x86: Simplify computing label offsets Peter Zijlstra
2021-10-27 8:53 ` [PATCH bpf-next 17/17] bpf,x86: Respect X86_FEATURE_RETPOLINE* Peter Zijlstra
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