Commit d6fd48ef authored by Borislav Petkov (AMD)'s avatar Borislav Petkov (AMD)
Browse files

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: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: default avatarTom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20230307192449.24732-3-bp@alien8.de
parent eeac8ede

arch/x86/kernel/sev.c

+0 −3
Original line number Diff line number Diff line
@@ -2183,9 +2183,6 @@ int snp_issue_guest_request(u64 exit_code, struct snp_req_data *input, unsigned 
	struct ghcb *ghcb;

	int ret;



	if (!cc_platform_has(CC_ATTR_GUEST_SEV_SNP))

		return -ENODEV;



	if (!fw_err)

		return -EINVAL;

drivers/virt/coco/sev-guest/sev-guest.c

+3 −0
Original line number Diff line number Diff line
@@ -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;