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| author | Borislav Petkov (AMD) <bp@alien8.de> | 2023-02-15 13:01:42 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-22 15:34:05 +0300 |
| commit | 12319ef1cfc7786864107f09f899c0daaac054e3 (patch) | |
| tree | dcda957e4e7339c5ca35c6497afc17eaf73f6f70 /drivers/virt | |
| parent | bed3a56c57180f777b1376a923e351d042647e3c (diff) | |
| download | linux-12319ef1cfc7786864107f09f899c0daaac054e3.tar.xz | |
virt/coco/sev-guest: Check SEV_SNP attribute at probe time
commit d6fd48eff7506bb866a54e40369df8899f2078a9 upstream.
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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 6de888bce1bb..57089c092d8a 100644 --- a/drivers/virt/coco/sev-guest/sev-guest.c +++ b/drivers/virt/coco/sev-guest/sev-guest.c @@ -705,6 +705,9 @@ 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; |