Commit 202818e1 authored by Saurabh Sengar's avatar Saurabh Sengar Committed by Wei Liu
Browse files

x86/hyperv: 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: default avatarSaurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: default avatar <anrayabh@linux.microsoft.com>
Link: https://lore.kernel.org/r/1667587123-31645-1-git-send-email-ssengar@linux.microsoft.com


Signed-off-by: default avatarWei Liu <wei.liu@kernel.org>
parent 503112f4

arch/x86/include/asm/hyperv-tlfs.h

+10 −1
Original line number Diff line number Diff line
@@ -374,11 +374,20 @@ struct hv_nested_enlightenments_control { 
struct hv_vp_assist_page {

	__u32 apic_assist;

	__u32 reserved1;

	__u64 vtl_control[3];

	__u32 vtl_entry_reason;

	__u32 vtl_reserved;

	__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 {