Messages in this thread | | | Date | Tue, 11 Sep 2018 12:38:28 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH v6 09/16] x86/bugs: Add mitigation to spectre and no meltdown for Hygon Dhyana |
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On Mon, Sep 10, 2018 at 09:17:40PM +0800, Pu Wen wrote: > The Hygon Dhyana CPU has the same speculative execution as AMD family > 17h, so share AMD spectre mitigation code for Hygon Dhyana. > > Also Hygon Dhyana is not affected by meltdown vulnerability as AMD, > so add the exception for Hygon Dhyana. > > Signed-off-by: Pu Wen <puwen@hygon.cn> > --- > arch/x86/kernel/cpu/bugs.c | 6 ++++-- > arch/x86/kernel/cpu/common.c | 1 + > 2 files changed, 5 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c > index 40bdaea..726010d 100644 > --- a/arch/x86/kernel/cpu/bugs.c > +++ b/arch/x86/kernel/cpu/bugs.c > @@ -312,8 +312,9 @@ static enum spectre_v2_mitigation_cmd __init spectre_v2_parse_cmdline(void) > } > > 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"); > + pr_err("retpoline,amd selected but CPU is not AMD or Hygon. Switching to AUTO select\n");
Didn't we say, no user-visible changes pls?
-- Regards/Gruss, Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
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