linux-kernel - RE: [PATCH v4 3/4] x86/mce: Add zhaoxin.c to support Zhaoxin MCA

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CY8PR11MB71348CE0BF3139D69169F9AF897A2@CY8PR11MB7134.namprd11.prod.outlook.com>
Date: Sat, 12 Oct 2024 11:27:45 +0000
From: "Zhuo, Qiuxu" <qiuxu.zhuo@...el.com>
To: Tony W Wang-oc <TonyWWang-oc@...oxin.com>, "tglx@...utronix.de"
	<tglx@...utronix.de>, "mingo@...hat.com" <mingo@...hat.com>, "bp@...en8.de"
	<bp@...en8.de>, "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
	"x86@...nel.org" <x86@...nel.org>, "hpa@...or.com" <hpa@...or.com>, "Luck,
 Tony" <tony.luck@...el.com>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-edac@...r.kernel.org"
	<linux-edac@...r.kernel.org>
CC: "CobeChen@...oxin.com" <CobeChen@...oxin.com>, "TimGuo@...oxin.com"
	<TimGuo@...oxin.com>, "LeoLiu-oc@...oxin.com" <LeoLiu-oc@...oxin.com>, "Lyle
 Li" <LyleLi@...oxin.com>
Subject: RE: [PATCH v4 3/4] x86/mce: Add zhaoxin.c to support Zhaoxin MCA

> From: Tony W Wang-oc <TonyWWang-oc@...oxin.com>
> [...]
> Subject: Re: [PATCH v4 3/4] x86/mce: Add zhaoxin.c to support Zhaoxin MCA
> >
> >> From: Tony W Wang-oc <TonyWWang-oc@...oxin.com> [...]
> >> +config X86_MCE_ZHAOXIN
> >> +     def_bool y
> >> +     prompt "Zhaoxin MCE features"
> >> +     depends on X86_MCE_INTEL
> >> +     help
> >> +       Additional support for zhaoxin specific MCE features such as
> >
> > s/zhaoxin/Zhaoxin
> >
> >> +       the corrected machine check interrupt.
> >> +
> >>   config X86_MCE_AMD
> >>        def_bool y
> >>        prompt "AMD MCE features"
> >> diff --git a/arch/x86/kernel/cpu/mce/Makefile
> >> b/arch/x86/kernel/cpu/mce/Makefile
> >> index 015856abd..2e863e78d 100644
> >> --- a/arch/x86/kernel/cpu/mce/Makefile
> >> +++ b/arch/x86/kernel/cpu/mce/Makefile
> >> @@ -5,7 +5,7 @@ obj-$(CONFIG_X86_ANCIENT_MCE) += winchip.o p5.o
> >>   obj-$(CONFIG_X86_MCE_INTEL)  += intel.o
> >>   obj-$(CONFIG_X86_MCE_AMD)    += amd.o
> >>   obj-$(CONFIG_X86_MCE_THRESHOLD) += threshold.o
> >> -
> >> +obj-$(CONFIG_X86_MCE_ZHAOXIN)   += zhaoxin.o
> >
> > Move this newly added item just after AMD's, so they're sorted in vendors.
> > And keep a blank line here as it was.
> >
> >>   mce-inject-y                 := inject.o
> >>   obj-$(CONFIG_X86_MCE_INJECT) += mce-inject.o
> >>
> >> [...]
> >> --- /dev/null
> >> +++ b/arch/x86/kernel/cpu/mce/zhaoxin.c
> >> @@ -0,0 +1,65 @@
> >> +// SPDX-License-Identifier: GPL-2.0
> >> +/*
> >> + * Zhaoxin specific MCE features
> >> + * Author: Lyle Li
> >> + */
> >> +#include <asm/msr.h>
> >> +#include "internal.h"
> >> +
> >> +static void mce_zhaoxin_apply_mce_broadcast(struct cpuinfo_x86 *c) {
> >> +     struct mca_config *cfg = &mca_cfg;
> >> +
> >> +     /* Older CPUs do not do MCE broadcast */
> >
> > s/MCE broadcast/MCE broadcast:/
> >
> >> +     if (c->x86 < 6)
> >> +             return;
> >> +     /*
> >> +      * All newer Zhaoxin and Centaur CPUs support MCE broadcasting.
> >> Enable
> >> +      * synchronization with a one second timeout.
> >> +      */
> >
> >
> > Instead of copying and pasting the redundant comments, could you use
> Dave's concise comments as suggested in:
> >
> >
> > https://lore.kernel.org/all/a25f878e-83d9-440a-9741-4cf86db4a716@intel
> > .com/
> >
> > /* All newer ones do: */
> >> +     if (c->x86 > 6)
> >> +             goto mce_broadcast;
> >> +
> >
> > /* Family 6 is mixed: */
> >> +     if (c->x86_vendor == X86_VENDOR_CENTAUR) {
> >> +             if (c->x86_model == 0xf && c->x86_stepping >= 0xe)
> >> +                     goto mce_broadcast;
> >> +     } else if (c->x86_vendor == X86_VENDOR_ZHAOXIN) {
> >> +             if (c->x86_model == 0x19 || c->x86_model == 0x1f)
> >> +                     goto mce_broadcast;
> >> +     }
> >> +
> >> +     return;
> >> [...]
> 
> Thank you for your review.
> Should I add the tag for this patch:
>      Reviewed-by: Qiuxu Zhuo <qiuxu.zhuo@...el.com>

Yes, you can, if the comments above are resolved.

-Qiuxu