[tip:,x86/urgent] virt/coco/sev-guest: Check SEV_SNP attribute at probe time
Commit Message
The following commit has been merged into the x86/urgent branch of tip:
Commit-ID: d6fd48eff7506bb866a54e40369df8899f2078a9
Gitweb: https://git.kernel.org/tip/d6fd48eff7506bb866a54e40369df8899f2078a9
Author: Borislav Petkov (AMD) <bp@alien8.de>
AuthorDate: Wed, 15 Feb 2023 11:01:42 +01:00
Committer: Borislav Petkov (AMD) <bp@alien8.de>
CommitterDate: Mon, 13 Mar 2023 11:20:20 +01:00
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
---
arch/x86/kernel/sev.c | 3 ---
drivers/virt/coco/sev-guest/sev-guest.c | 3 +++
2 files changed, 3 insertions(+), 3 deletions(-)
@@ -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;
@@ -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;