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| author | Borislav Petkov (AMD) <bp@alien8.de> | 2023-02-15 11:01:42 +0100 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-03-13 11:20:20 +0100 |
| commit | d6fd48eff7506bb866a54e40369df8899f2078a9 (patch) | |
| tree | 0c43b93da1a1b330156173d0d12d70bebe9a488e /drivers/virt | |
| parent | Linux 6.3-rc2 (diff) | |
| download | linux-d6fd48eff7506bb866a54e40369df8899f2078a9.tar.xz linux-d6fd48eff7506bb866a54e40369df8899f2078a9.zip | |
virt/coco/sev-guest: Check SEV_SNP attribute at probe time
No need to check it on every ioctl. And yes, this is a common SEV driver
but it does only SNP-specific operations currently. This can be
revisited later, when more use cases appear.
No functional changes.
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20230307192449.24732-3-bp@alien8.de
Diffstat (limited to 'drivers/virt')
| -rw-r--r-- | drivers/virt/coco/sev-guest/sev-guest.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/virt/coco/sev-guest/sev-guest.c b/drivers/virt/coco/sev-guest/sev-guest.c index 7b4e9009f335..ed5d6ae1a144 100644 --- a/drivers/virt/coco/sev-guest/sev-guest.c +++ b/drivers/virt/coco/sev-guest/sev-guest.c @@ -703,6 +703,9 @@ static int __init sev_guest_probe(struct platform_device *pdev) void __iomem *mapping; int ret; + if (!cc_platform_has(CC_ATTR_GUEST_SEV_SNP)) + return -ENODEV; + if (!dev->platform_data) return -ENODEV; |