x86/hyperv: Add VTL specific structs and hypercalls

Add structs and hypercalls required to enable VTL support on x86.

Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Stanislav Kinsburskii <stanislav.kinsburskii@gmail.com>
Link: https://lore.kernel.org/r/1681192532-15460-3-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 b4fb75b..cea95dc 100644 (file)
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -716,6 +716,81 @@ union hv_msi_entry {
        } __packed;
 };
 
+struct hv_x64_segment_register {
+       u64 base;
+       u32 limit;
+       u16 selector;
+       union {
+               struct {
+                       u16 segment_type : 4;
+                       u16 non_system_segment : 1;
+                       u16 descriptor_privilege_level : 2;
+                       u16 present : 1;
+                       u16 reserved : 4;
+                       u16 available : 1;
+                       u16 _long : 1;
+                       u16 _default : 1;
+                       u16 granularity : 1;
+               } __packed;
+               u16 attributes;
+       };
+} __packed;
+
+struct hv_x64_table_register {
+       u16 pad[3];
+       u16 limit;
+       u64 base;
+} __packed;
+
+struct hv_init_vp_context {
+       u64 rip;
+       u64 rsp;
+       u64 rflags;
+
+       struct hv_x64_segment_register cs;
+       struct hv_x64_segment_register ds;
+       struct hv_x64_segment_register es;
+       struct hv_x64_segment_register fs;
+       struct hv_x64_segment_register gs;
+       struct hv_x64_segment_register ss;
+       struct hv_x64_segment_register tr;
+       struct hv_x64_segment_register ldtr;
+
+       struct hv_x64_table_register idtr;
+       struct hv_x64_table_register gdtr;
+
+       u64 efer;
+       u64 cr0;
+       u64 cr3;
+       u64 cr4;
+       u64 msr_cr_pat;
+} __packed;
+
+union hv_input_vtl {
+       u8 as_uint8;
+       struct {
+               u8 target_vtl: 4;
+               u8 use_target_vtl: 1;
+               u8 reserved_z: 3;
+       };
+} __packed;
+
+struct hv_enable_vp_vtl {
+       u64                             partition_id;
+       u32                             vp_index;
+       union hv_input_vtl              target_vtl;
+       u8                              mbz0;
+       u16                             mbz1;
+       struct hv_init_vp_context       vp_context;
+} __packed;
+
+struct hv_get_vp_from_apic_id_in {
+       u64 partition_id;
+       union hv_input_vtl target_vtl;
+       u8 res[7];
+       u32 apic_ids[];
+} __packed;
+
 #include <asm-generic/hyperv-tlfs.h>
 
 #endif

diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h
index ea406e9..f4e4cc4 100644 (file)
--- a/include/asm-generic/hyperv-tlfs.h
+++ b/include/asm-generic/hyperv-tlfs.h
@@ -146,6 +146,7 @@ union hv_reference_tsc_msr {
 /* Declare the various hypercall operations. */
 #define HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE     0x0002
 #define HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST      0x0003
+#define HVCALL_ENABLE_VP_VTL                   0x000f
 #define HVCALL_NOTIFY_LONG_SPIN_WAIT           0x0008
 #define HVCALL_SEND_IPI                                0x000b
 #define HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX  0x0013
@@ -165,6 +166,8 @@ union hv_reference_tsc_msr {
 #define HVCALL_MAP_DEVICE_INTERRUPT            0x007c
 #define HVCALL_UNMAP_DEVICE_INTERRUPT          0x007d
 #define HVCALL_RETARGET_INTERRUPT              0x007e
+#define HVCALL_START_VP                                0x0099
+#define HVCALL_GET_VP_ID_FROM_APIC_ID          0x009a
 #define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE 0x00af
 #define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_LIST 0x00b0
 #define HVCALL_MODIFY_SPARSE_GPA_PAGE_HOST_VISIBILITY 0x00db
@@ -220,6 +223,7 @@ enum HV_GENERIC_SET_FORMAT {
 #define HV_STATUS_INVALID_PORT_ID              17
 #define HV_STATUS_INVALID_CONNECTION_ID                18
 #define HV_STATUS_INSUFFICIENT_BUFFERS         19
+#define HV_STATUS_VTL_ALREADY_ENABLED          134
 
 /*
  * The Hyper-V TimeRefCount register and the TSC