linux-kernel - [PATCH v2 1/4] crypto: ccp: Use cc_platform

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Message-ID: <20220211210255.9820-2-mario.limonciello@amd.com>
Date:   Fri, 11 Feb 2022 15:02:52 -0600
From:   Mario Limonciello <mario.limonciello@....com>
To:     Borislav Petkov <bp@...en8.de>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>
CC:     Kees Cook <keescook@...omium.org>,
        Thomas Lendacky <Thomas.Lendacky@....com>,
        <hughsient@...il.com>,
        Martin Fernandez <martin.fernandez@...ypsium.com>,
        <linux-kernel@...r.kernel.org>,
        "Brijesh Singh" <brijesh.singh@....com>,
        Mario Limonciello <mario.limonciello@....com>
Subject: [PATCH v2 1/4] crypto: ccp: Use cc_platform_has to determine SEV presence

The CPU feature flag shouldn't be used to determine if SEV is active,
that's what `cc_platform_has` is for.

Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
 drivers/crypto/ccp/sev-dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index 8fd774a10edc..e061eb6a039c 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -1148,7 +1148,7 @@ int sev_dev_init(struct psp_device *psp)
 	struct sev_device *sev;
 	int ret = -ENOMEM;
 
-	if (!boot_cpu_has(X86_FEATURE_SEV)) {
+	if (!cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT)) {
 		dev_info_once(dev, "SEV: memory encryption not enabled by BIOS\n");
 		return 0;
 	}
-- 
2.34.1