From: Borislav Petkov <bp@alien8.de>
To: "Koralahalli Channabasappa, Smita" <skoralah@amd.com>
Cc: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>,
x86@kernel.org, linux-edac@vger.kernel.org,
linux-kernel@vger.kernel.org, Tony Luck <tony.luck@intel.com>,
"H . Peter Anvin" <hpa@zytor.com>,
yazen.ghannam@amd.com
Subject: Re: [PATCH 1/5] x86/mce/inject: Check if a bank is unpopulated before error simulation
Date: Thu, 14 Oct 2021 22:57:10 +0200 [thread overview]
Message-ID: <YWiZpm/HzKybyOt2@zn.tnic> (raw)
In-Reply-To: <f6b6b66d-0e6b-e64a-9c97-4e067610a3da@amd.com>
On Thu, Oct 14, 2021 at 03:26:13PM -0500, Koralahalli Channabasappa, Smita wrote:
> My concern was, we need to determine whether the bank is unpopulated or
> populated before trying to inject the errors on a hw injection, for which
> we need to read the IPID MSR of that bank.
Ah, that. Look at the smca_banks[] array in .../mce/amd.c and how
smca_configure() prepares all banks in there. You could use that array
to query which SMCA bank on which CPU is initialized, before injecting
into it.
> should be retained inside inj_bank_set() ?
And yes, I guess you'll have to do it there because then you know which
bank and which CPU the hw injection is supposed to happen on.
> And inj_ipid_set() should just set m->ipid = val on a SW_INJ as you mentioned
> above?
Yap.
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2021-10-14 20:57 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-15 23:27 [PATCH 0/5] x86/mce: Handle error simulation failures in mce-inject module Smita Koralahalli
2021-09-15 23:27 ` [PATCH 1/5] x86/mce/inject: Check if a bank is unpopulated before error simulation Smita Koralahalli
2021-09-24 8:26 ` Borislav Petkov
2021-09-27 19:51 ` Smita Koralahalli Channabasappa
2021-09-27 20:15 ` Borislav Petkov
2021-09-27 21:56 ` Smita Koralahalli Channabasappa
2021-09-27 22:05 ` Borislav Petkov
2021-10-11 21:12 ` Koralahalli Channabasappa, Smita
2021-10-14 18:22 ` Borislav Petkov
2021-10-14 20:26 ` Koralahalli Channabasappa, Smita
2021-10-14 20:57 ` Borislav Petkov [this message]
2021-09-15 23:27 ` [PATCH 2/5] x86/mce/inject: Set the valid bit in MCA_STATUS before error injection Smita Koralahalli
2021-09-24 8:26 ` Borislav Petkov
2021-09-15 23:27 ` [PATCH 3/5] x86/mce: Use msr_ops in prepare_msrs() Smita Koralahalli
2021-09-24 8:26 ` Borislav Petkov
2021-09-15 23:27 ` [PATCH 4/5] x86/mce/inject: Check for writes ignored in status registers Smita Koralahalli
2021-09-15 23:27 ` [PATCH 5/5] x86/mce/mce-inject: Return error code to userspace from mce-inject module Smita Koralahalli
2021-09-24 8:26 ` Borislav Petkov
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