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Message-Id: <1667537814-15939-1-git-send-email-ssengar@linux.microsoft.com>
Date: Thu, 3 Nov 2022 21:56:54 -0700
From: Saurabh Sengar <ssengar@...ux.microsoft.com>
To: ssengar@...rosoft.com, kys@...rosoft.com, haiyangz@...rosoft.com,
wei.liu@...nel.org, decui@...rosoft.com,
ssengar@...ux.microsoft.com, linux-hyperv@...r.kernel.org,
linux-kernel@...r.kernel.org, mikelley@...rosoft.com,
tglx@...utronix.de, bp@...en8.de, dave.hansen@...ux.intel.com,
x86@...nel.org, hpa@...or.com
Subject: [PATCH] x86/Hyper-V: Expand definition of struct hv_vp_assist_page
The struct hv_vp_assist_page has 24 bytes which is defined as u64[3],
expand that to expose vtl_entry_reason, vtl_ret_x64rax and vtl_ret_x64rcx
field. vtl_entry_reason is updated by hypervisor for the entry reason as
to why the VTL was entered on the virtual processor.
Guest updates the vtl_ret_* fields to provide the register values to
restore on VTL return. The specific register values that are restored
which will be updated on vtl_ret_x64rax and vtl_ret_x64rcx.
Also added the missing fields for synthetic_time_unhalted_timer_expired,
virtualization_fault_information and intercept_message.
Signed-off-by: Saurabh Sengar <ssengar@...ux.microsoft.com>
---
arch/x86/include/asm/hyperv-tlfs.h | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index f769b9db4630..b3d0f42853d2 100644
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -377,11 +377,20 @@ struct hv_nested_enlightenments_control {
struct hv_vp_assist_page {
__u32 apic_assist;
__u32 reserved1;
- __u64 vtl_control[3];
+ __u8 vtl_entry_reason;
+ __u8 vtl_reserved[7];
+ __u64 vtl_ret_x64rax;
+ __u64 vtl_ret_x64rcx;
struct hv_nested_enlightenments_control nested_control;
__u8 enlighten_vmentry;
__u8 reserved2[7];
__u64 current_nested_vmcs;
+ __u8 synthetic_time_unhalted_timer_expired;
+ __u8 reserved3[7];
+ __u8 virtualization_fault_information[40];
+ __u8 reserved4[8];
+ __u8 intercept_message[256];
+ __u8 vtl_ret_actions[256];
} __packed;
struct hv_enlightened_vmcs {
--
2.34.1
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