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x86/hyperv: Expand definition of struct hv_vp_assist_page

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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@linux.microsoft.com>
Reviewed-by: <anrayabh@linux.microsoft.com>
Link: https://lore.kernel.org/r/1667587123-31645-1-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Saurabh Sengar 2022-11-04 11:38:43 -07:00 committed by Wei Liu
parent 503112f422
commit 202818e1c8
1 changed files with 10 additions and 1 deletions
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11
arch/x86/include/asm/hyperv-tlfs.h
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@ -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 {