From: Tycho Andersen <tycho@kernel.org>
To: Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Ashish Kalra <ashish.kalra@amd.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
John Allen <john.allen@amd.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
"David S. Miller" <davem@davemloft.net>,
Ard Biesheuvel <ardb@kernel.org>,
Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>,
Kishon Vijay Abraham I <kvijayab@amd.com>,
Alexey Kardashevskiy <aik@amd.com>,
Nikunj A Dadhania <nikunj@amd.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Kim Phillips <kim.phillips@amd.com>,
Sean Christopherson <seanjc@google.com>
Cc: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org,
"Tycho Andersen (AMD)" <tycho@kernel.org>
Subject: [PATCH v2 0/2] Skip SNP initialization if CPUs are offlined
Date: Tue, 7 Apr 2026 11:47:11 -0600 [thread overview]
Message-ID: <20260407174713.439474-1-tycho@kernel.org> (raw)
From: "Tycho Andersen (AMD)" <tycho@kernel.org>
Here's a v2 of the series. Changes are:
* propagate the error from snp_prepare() through __sev_snp_init_locked()
* use cpus_present_mask instead of cpus_possible_mask to reason about
the set of available CPUs
* print the CPU masks for easier debugging
It turns out that CONFIG_INIT_ALL_POSSIBLE is not user-settable, and
only parisc selects it, so it shouldn't be a problem here.
v1 is here: https://lore.kernel.org/all/20260401143552.3038979-1-tycho@kernel.org/
Tycho Andersen (AMD) (2):
x86/sev: Do not initialize SNP if missing CPUs
crypto/ccp: Skip SNP_INIT if preparation fails
arch/x86/include/asm/sev.h | 4 ++--
arch/x86/virt/svm/sev.c | 15 +++++++++++++--
drivers/crypto/ccp/sev-dev.c | 4 +++-
3 files changed, 18 insertions(+), 5 deletions(-)
base-commit: 6c927e5ca9d238f8ae40b453a8382eb9cf4ee855
--
2.53.0
next reply other threads:[~2026-04-07 17:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-07 17:47 Tycho Andersen [this message]
2026-04-07 17:47 ` [PATCH v2 1/2] x86/sev: Do not initialize SNP if missing CPUs Tycho Andersen
2026-04-07 17:47 ` [PATCH v2 2/2] crypto/ccp: Skip SNP_INIT if preparation fails Tycho Andersen
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