This is a note to let you know that I've just added the patch titled
virt/coco/sev-guest: Check SEV_SNP attribute at probe time
to the 6.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
virt-coco-sev-guest-check-sev_snp-attribute-at-probe-time.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d6fd48eff7506bb866a54e40369df8899f2078a9 Mon Sep 17 00:00:00 2001
From: "Borislav Petkov (AMD)" <bp@xxxxxxxxx>
Date: Wed, 15 Feb 2023 11:01:42 +0100
Subject: virt/coco/sev-guest: Check SEV_SNP attribute at probe time
From: Borislav Petkov (AMD) <bp@xxxxxxxxx>
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@xxxxxxxxx>
Reviewed-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
Link: https://lore.kernel.org/r/20230307192449.24732-3-bp@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/sev.c | 3 ---
drivers/virt/coco/sev-guest/sev-guest.c | 3 +++
2 files changed, 3 insertions(+), 3 deletions(-)
--- a/arch/x86/kernel/sev.c
+++ b/arch/x86/kernel/sev.c
@@ -2183,9 +2183,6 @@ int snp_issue_guest_request(u64 exit_cod
struct ghcb *ghcb;
int ret;
- if (!cc_platform_has(CC_ATTR_GUEST_SEV_SNP))
- return -ENODEV;
-
if (!fw_err)
return -EINVAL;
--- 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
void __iomem *mapping;
int ret;
+ if (!cc_platform_has(CC_ATTR_GUEST_SEV_SNP))
+ return -ENODEV;
+
if (!dev->platform_data)
return -ENODEV;
Patches currently in stable-queue which might be from bp@xxxxxxxxx are
queue-6.2/virt-coco-sev-guest-do-some-code-style-cleanups.patch
queue-6.2/virt-coco-sev-guest-add-throttling-awareness.patch
queue-6.2/virt-coco-sev-guest-simplify-extended-guest-request-handling.patch
queue-6.2/x86-mm-fix-use-of-uninitialized-buffer-in-sme_enable.patch
queue-6.2/ftrace-kcfi-define-ftrace_stub_graph-conditionally.patch
queue-6.2/x86-mce-make-sure-logged-mces-are-processed-after-sysfs-update.patch
queue-6.2/virt-coco-sev-guest-convert-the-sw_exit_info_2-checking-to-a-switch-case.patch
queue-6.2/virt-coco-sev-guest-remove-the-disable_vmpck-label-in-handle_guest_request.patch
queue-6.2/virt-coco-sev-guest-carve-out-the-request-issuing-logic-into-a-helper.patch
queue-6.2/virt-coco-sev-guest-check-sev_snp-attribute-at-probe-time.patch
