From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BB05738C41A; Tue, 7 Apr 2026 17:49:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775584150; cv=none; b=piCQl8fG1vOeoAL+edUjwszQ4xcZyE1ljBIXsPa5X9pSSc2+Hy0fW3t5Lh72VAX5WM19ekY0Dyc2IP5tYvTd/wSTlTzk4MlDn6MGGRiAjOIIAR6LcSieJqw7O5QES3W0lpv+gTUHyF/i+V1GvaDg/A6VWlwsN6pWwc7v8/cLGQc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775584150; c=relaxed/simple; bh=J3ccJ20YEcKVvAC8qpCT4CXnRnkkZO8YTXGG4okMx4Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=k5EOQGoQRnUEeWWrw70+LIJ9VbOFZUgeT8Z5c8tSldk6BUuJMNd4luSZ539wdaF9JNbfFrQJ5PaeIE6zHDsoFH8blDoV6z5QfRCqoKnlgfDgGR/Naoe9Pranue+Ggj0fulZA5zhse8rqHl43kfiHBQyGw3StMcERAi8ouCl1Xq4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=r9iED0vH; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="r9iED0vH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CF3A2C116C6; Tue, 7 Apr 2026 17:49:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775584150; bh=J3ccJ20YEcKVvAC8qpCT4CXnRnkkZO8YTXGG4okMx4Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r9iED0vHb8jSfdQ1ic8E2nkBc3Qu/JwSghQSkwXfoN3ZOHvrUMlRL5yH5H+R4FBy1 k8bYWAX2YNSixSm2ml53GHFbn6EeAGXd9Y0oLMDo5Qj6+FjN5GdAC98+eC0A0fP/aC uBfXMW/W+6OtGtGkpmCzMRbSli+k1Qhox6W5pEObZ+e2AmnzJ3gU612hb6fQh6A7nQ amVdr4xEGCQjjraU9C78CpTPcbPjeVlGvsyM8P+tFhEu9FrS4ibE29fShXTNiixcz5 BkuMCJu05lQkSBkgL2SYJ4sFgmj0mANUUvV21xQHVEGGeJa9r7pmsYGh6uJ2HmrzDJ Nr3SaWTZnNN8A== From: Tycho Andersen To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Ashish Kalra , Tom Lendacky , John Allen , Herbert Xu , "David S. Miller" , Ard Biesheuvel , Neeraj Upadhyay , Kishon Vijay Abraham I , Alexey Kardashevskiy , Nikunj A Dadhania , "Peter Zijlstra (Intel)" , Kim Phillips , Sean Christopherson Cc: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, "Tycho Andersen (AMD)" Subject: [PATCH v2 2/2] crypto/ccp: Skip SNP_INIT if preparation fails Date: Tue, 7 Apr 2026 11:47:13 -0600 Message-ID: <20260407174713.439474-3-tycho@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260407174713.439474-1-tycho@kernel.org> References: <20260407174713.439474-1-tycho@kernel.org> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: "Tycho Andersen (AMD)" During SNP_INIT, the firmware checks to see that the SNP enable bit is set on all CPUs. If snp_prepare() failed because not all CPUs were online, SNP_INIT will fail, so skip it. Signed-off-by: Tycho Andersen (AMD) --- drivers/crypto/ccp/sev-dev.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index 939fa8aa155c..854263cbb256 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -1374,7 +1374,9 @@ static int __sev_snp_init_locked(int *error, unsigned int max_snp_asid) return -EOPNOTSUPP; } - snp_prepare(); + rc = snp_prepare(); + if (rc < 0) + return rc; /* * Starting in SNP firmware v1.52, the SNP_INIT_EX command takes a list -- 2.53.0