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: 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>

diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index 3089ec352743b6e13a3fde63c01e09029cb797ad..6d9368ea3701ca11b441a7324ba6cceed2e66308 100644 (file)
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -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 {