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x86,bugs: Unconditionally allow spectre_v2=retpoline,amd

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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) <[email protected]>
Reviewed-by: Borislav Petkov <[email protected]>
Acked-by: Josh Poimboeuf <[email protected]>
Tested-by: Alexei Starovoitov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
This commit is contained in:
Peter Zijlstra committed 2021-10-28 23:25:29 +02:00
1 parent d4b5a5c993
commit f8a66d608a
1 file changed
-7
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arch/x86/kernel/cpu/bugs.c
-7
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@@ -882,13 +882,6 @@ static enum spectre_v2_mitigation_cmd __init spectre_v2_parse_cmdline(void)
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;