linux-kernel - [PATCH] virt: sev-guest: fix kconfig warnings

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Message-Id: <20230529231305.16995-1-rdunlap@infradead.org>
Date:   Mon, 29 May 2023 16:13:05 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        kernel test robot <lkp@...el.com>,
        Brijesh Singh <brijesh.singh@....com>,
        Paul Gazzillo <paul@...zz.com>,
        Necip Fazil Yildiran <fazilyildiran@...il.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        linux-crypto@...r.kernel.org,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH] virt: sev-guest: fix kconfig warnings

kconfig complains about unmet dependencies for SEV_GUEST
whenever CRYPTO is not set/enabled, so also select CRYPTO
when selecting other crypto kconfig options to silence the
warnings.

Quietens these warnings:

WARNING: unmet direct dependencies detected for CRYPTO_GCM
  Depends on [n]: CRYPTO [=n]
  Selected by [y]:
  - SEV_GUEST [=y] && VIRT_DRIVERS [=y] && AMD_MEM_ENCRYPT [=y]

WARNING: unmet direct dependencies detected for CRYPTO_AEAD2
  Depends on [n]: CRYPTO [=n]
  Selected by [y]:
  - SEV_GUEST [=y] && VIRT_DRIVERS [=y] && AMD_MEM_ENCRYPT [=y]

Fixes: fce96cf04430 ("virt: Add SEV-SNP guest driver")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Reported-by: kernel test robot <lkp@...el.com>
Link: lore.kernel.org/r/202305300557.PJ5ao694-lkp@...el.com
Cc: Brijesh Singh <brijesh.singh@....com>
Cc: Paul Gazzillo <paul@...zz.com>
Cc: Necip Fazil Yildiran <fazilyildiran@...il.com>
Cc: Tom Lendacky <thomas.lendacky@....com>
Cc: linux-crypto@...r.kernel.org
Cc: Herbert Xu <herbert@...dor.apana.org.au>
Cc: "David S. Miller" <davem@...emloft.net>
---
 drivers/virt/coco/sev-guest/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff -- a/drivers/virt/coco/sev-guest/Kconfig b/drivers/virt/coco/sev-guest/Kconfig
--- a/drivers/virt/coco/sev-guest/Kconfig
+++ b/drivers/virt/coco/sev-guest/Kconfig
@@ -2,6 +2,7 @@ config SEV_GUEST
 	tristate "AMD SEV Guest driver"
 	default m
 	depends on AMD_MEM_ENCRYPT
+	select CRYPTO
 	select CRYPTO_AEAD2
 	select CRYPTO_GCM
 	help