From: Herbert Xu <herbert@gondor.apana.org.au>
To: Tycho Andersen <tycho@kernel.org>
Cc: 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>,
"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>,
linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org
Subject: Re: [PATCH v3 6/7] crypto: ccp - implement SNP x86 shutdown
Date: Sat, 21 Mar 2026 17:44:00 +0900 [thread overview]
Message-ID: <ab5aUI77Wik5GvXV@gondor.apana.org.au> (raw)
In-Reply-To: <20260317162157.150842-7-tycho@kernel.org>
On Tue, Mar 17, 2026 at 10:21:56AM -0600, Tycho Andersen wrote:
> From: "Tycho Andersen (AMD)" <tycho@kernel.org>
>
> The SEV firmware has support to disable SNP during an SNP_SHUTDOWN_EX
> command. Verify that this support is available and set the flag so that SNP
> is disabled when it is not being used. In cases where SNP is disabled, skip
> the call to amd_iommu_snp_disable(), as all of the IOMMU pages have already
> been made shared. Also skip the panic case, since snp_x86_shutdown() does
> IPIs.
>
> Signed-off-by: Tycho Andersen (AMD) <tycho@kernel.org>
> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
> ---
> drivers/crypto/ccp/sev-dev.c | 41 +++++++++++++++++++++---------------
> include/linux/psp-sev.h | 4 +++-
> 2 files changed, 27 insertions(+), 18 deletions(-)
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Thanks,
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
next prev parent reply other threads:[~2026-03-21 8:44 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-17 16:21 [PATCH v3 0/7] Move SNP initialization to the CCP driver Tycho Andersen
2026-03-17 16:21 ` [PATCH v3 1/7] x86/snp: Create a function to clear/zero the RMP Tycho Andersen
2026-03-17 16:21 ` [PATCH v3 2/7] x86/snp: create snp_prepare_for_snp_init() Tycho Andersen
2026-03-21 16:45 ` Borislav Petkov
2026-03-17 16:21 ` [PATCH v3 3/7] x86/snp: create snp_x86_shutdown() Tycho Andersen
2026-03-21 17:05 ` Borislav Petkov
2026-03-23 15:31 ` Tycho Andersen
2026-03-23 15:44 ` Borislav Petkov
2026-03-17 16:21 ` [PATCH v3 4/7] x86/snp, crypto: move SNP init to ccp driver Tycho Andersen
2026-03-17 16:21 ` [PATCH v3 5/7] x86/snp, crypto: move HSAVE_PA setup to arch/ Tycho Andersen
2026-03-23 15:47 ` Borislav Petkov
2026-03-17 16:21 ` [PATCH v3 6/7] crypto: ccp - implement SNP x86 shutdown Tycho Andersen
2026-03-21 8:44 ` Herbert Xu [this message]
2026-03-17 16:21 ` [PATCH v3 7/7] crypto: ccp - Update HV_FIXED page states to allow freeing of memory Tycho Andersen
2026-03-21 8:44 ` Herbert Xu
2026-03-23 15:49 ` [PATCH v3 0/7] Move SNP initialization to the CCP driver Borislav Petkov
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