linux-kernel - [PATCH 1/3] x86/Hyper-V: Fix definition of struct hv_vp_assist

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Date:   Fri,  9 Aug 2019 17:49:37 +0800
From:   lantianyu1986@...il.com
To:     pbonzini@...hat.com, rkrcmar@...hat.com, corbet@....net,
        kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        sashal@...nel.org, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, hpa@...or.com, x86@...nel.org,
        michael.h.kelley@...rosoft.com
Cc:     Tianyu Lan <Tianyu.Lan@...rosoft.com>, kvm@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hyperv@...r.kernel.org, vkuznets@...hat.com
Subject: [PATCH 1/3] x86/Hyper-V: Fix definition of struct hv_vp_assist_page

From: Tianyu Lan <Tianyu.Lan@...rosoft.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@...rosoft.com>
---
 arch/x86/include/asm/hyperv-tlfs.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index af78cd72b8f3..a79703c56ebe 100644
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -517,11 +517,11 @@ struct hv_timer_message_payload {
 /* Define virtual processor assist page structure. */
 struct hv_vp_assist_page {
 	__u32 apic_assist;
-	__u32 reserved;
-	__u64 vtl_control[2];
+	__u32 reserved1;
+	__u64 vtl_control[3];
 	__u64 nested_enlightenments_control[2];
-	__u32 enlighten_vmentry;
-	__u32 padding;
+	__u8 enlighten_vmentry;
+	__u8 reserved2[7];
 	__u64 current_nested_vmcs;
 } __packed;
 
-- 
2.14.2