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Message-ID: <20240626181015.GCZnxZh2LF2N1ehu9e@fat_crate.local>
Date: Wed, 26 Jun 2024 20:10:15 +0200
From: Borislav Petkov <bp@...en8.de>
To: "Luck, Tony" <tony.luck@...el.com>,
Steven Rostedt <rostedt@...dmis.org>
Cc: Avadhut Naik <avadhut.naik@....com>, "x86@...nel.org" <x86@...nel.org>,
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Subject: Re: [PATCH v2 1/4] x86/mce: Add wrapper for struct mce to export
vendor specific info
On Wed, Jun 26, 2024 at 05:11:29PM +0000, Luck, Tony wrote:
> > Tony, any comments? You ok with this, would that fit any Intel-specific vendor
> > fields too or do you need some additional Intel-specific changes?
>
> It looks easy enough to add any Intel specific bits to the union later.
>
> Is there anyway that the trace event could be "smarter" about what vendor specific
> information to include based on boot_cpu_data.x86_vendor? As currently written
> Intel systems are going to see 3*u64 decoded into ascii, that are all zero. Not a
> huge deal, I think it will just look like "0x0,0x0,0x0"
Hmm, good question.
Yo, Steve, is there a way to do conditional things in a TP?
For example:
@@ -83,7 +87,8 @@ TRACE_EVENT(mce_record,
__entry->walltime,
__entry->socketid,
__entry->apicid,
- __entry->microcode)
+ __entry->microcode,
if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
__print_array(__get_dynamic_array(v_data), __entry->len / 8, 8))
i.e., print that array only when on a AMD.
I'm sure this won't fly as it is macro magic - this is just to show the
intent...
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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