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Cc:     Tianyu Lan <Tianyu.Lan@microsoft.com>, kvm@vger.kernel.org,
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Subject: [PATCH V3 1/3] x86/Hyper-V: Fix definition of struct hv_vp_assist_page
Date:   Mon, 19 Aug 2019 21:17:35 +0800
Message-Id: <20190819131737.26942-2-Tianyu.Lan@microsoft.com>
In-Reply-To: <20190819131737.26942-1-Tianyu.Lan@microsoft.com>
References: <20190819131737.26942-1-Tianyu.Lan@microsoft.com>
Sender: linux-kernel-owner@vger.kernel.org
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From: Tianyu Lan <Tianyu.Lan@microsoft.com>

The struct hv_vp_assist_page was defined incorrectly.
The "vtl_control" should be u64[3], "nested_enlightenments
_control" should be a u64 and there is 7 reserved bytes
following "enlighten_vmentry". This patch is to fix it.

Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
--
Change since v1:
       Move definition of struct hv_nested_enlightenments_control
       into this patch to fix offset issue.
---
 arch/x86/include/asm/hyperv-tlfs.h | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index af78cd72b8f3..cf0b2a04271d 100644
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -514,14 +514,24 @@ struct hv_timer_message_payload {
 	__u64 delivery_time;	/* When the message was delivered */
 } __packed;
 
+struct hv_nested_enlightenments_control {
+	struct {
+		__u32 directhypercall:1;
+		__u32 reserved:31;
+	} features;
+	struct {
+		__u32 reserved;
+	} hypercallControls;
+} __packed;
+
 /* Define virtual processor assist page structure. */
 struct hv_vp_assist_page {
 	__u32 apic_assist;
-	__u32 reserved;
-	__u64 vtl_control[2];
-	__u64 nested_enlightenments_control[2];
-	__u32 enlighten_vmentry;
-	__u32 padding;
+	__u32 reserved1;
+	__u64 vtl_control[3];
+	struct hv_nested_enlightenments_control nested_control;
+	__u8 enlighten_vmentry;
+	__u8 reserved2[7];
 	__u64 current_nested_vmcs;
 } __packed;
 
-- 
2.14.5