From: Wei Hu <weh@linux.microsoft.com>
To: linux-hyperv@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
"K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
Long Li <longli@microsoft.com>, Wei Hu <weh@microsoft.com>
Subject: [PATCH v1 05/13] hyperv: fix hv_input_get_system_property layout for SNP status
Date: Fri, 7 Aug 2026 13:51:11 +0000 [thread overview]
Message-ID: <20260807135134.303943-6-weh@linux.microsoft.com> (raw)
In-Reply-To: <20260807135134.303943-1-weh@linux.microsoft.com>
From: Wei Hu <weh@microsoft.com>
The processor-feature selector must sit at offset 8 (property_id + u32
reserved), matching the Microsoft Hypervisor ABI. Upstream 7.1's leaner
struct placed it at offset 4, so HVCALL_GET_SYSTEM_PROPERTY(SNP_STATUS)
failed and mshv aborted (no /dev/mshv). Restore reserved + u64 union.
Signed-off-by: Wei Hu <weh@microsoft.com>
---
include/hyperv/hvhdk_mini.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/hyperv/hvhdk_mini.h b/include/hyperv/hvhdk_mini.h
index db83fedce243..dd84085c0aff 100644
--- a/include/hyperv/hvhdk_mini.h
+++ b/include/hyperv/hvhdk_mini.h
@@ -237,8 +237,9 @@ enum hv_dynamic_processor_feature_property {
struct hv_input_get_system_property {
u32 property_id; /* enum hv_system_property */
+ u32 reserved;
union {
- u32 as_uint32;
+ u64 as_uint64;
#if IS_ENABLED(CONFIG_X86)
/* enum hv_dynamic_processor_feature_property */
u32 hv_processor_feature;
--
2.43.0
next prev parent reply other threads:[~2026-08-07 13:52 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-07 13:51 [PATCH v1 00/13] mshv: add SEV-SNP support for MSHV root partitions Wei Hu
2026-08-07 13:51 ` [PATCH v1 01/13] mshv: add SEV-SNP UAPI definitions Wei Hu
2026-08-07 13:51 ` [PATCH v1 02/13] mshv: add SEV-SNP PSP request hypercall Wei Hu
2026-08-07 13:51 ` [PATCH v1 03/13] mshv: add SEV-SNP isolated page hypercalls Wei Hu
2026-08-07 13:51 ` [PATCH v1 04/13] mshv: wire SEV-SNP partition ioctls Wei Hu
2026-08-07 13:51 ` Wei Hu [this message]
2026-08-07 13:51 ` [PATCH v1 06/13] mshv: detect and report SEV-SNP support at init Wei Hu
2026-08-07 13:51 ` [PATCH v1 07/13] mshv: default to safe partition CPU features Wei Hu
2026-08-07 13:51 ` [PATCH v1 08/13] mshv: accept partial CPU feature banks Wei Hu
2026-08-07 13:51 ` [PATCH v1 09/13] mshv: define full processor and xsave feature masks Wei Hu
2026-08-07 13:51 ` [PATCH v1 10/13] mshv: unmap SNP memory before state teardown Wei Hu
2026-08-07 13:51 ` [PATCH v1 11/13] mshv: unlock SNP pages on panic for crashdump collection Wei Hu
2026-08-07 13:51 ` [PATCH v1 12/13] hyperv: add MSHV Dom0 root-partition boot enablement (EFI HvLoader) Wei Hu
2026-08-07 13:51 ` [PATCH v1 13/13] mshv: set up own SynIC registers on a nested root partition Wei Hu
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