Pull hyperv updates from Wei Liu: - Enhancements to Linux as the root partition for Microsoft Hypervisor: - Support a new mode called L1VH, which allows Linux to drive the hypervisor running the Azure Host directly - Support for MSHV crash dump collection - Allow Linux's memory management subsystem to better manage guest memory regions - Fix issues that prevented a clean shutdown of the whole system on bare metal and nested configurations - ARM64 support for the MSHV driver - Various other bug fixes and cleanups - Add support for Confidential VMBus for Linux guest on Hyper-V - Secure AVIC support for Linux guests on Hyper-V - Add the mshv_vtl driver to allow Linux to run as the secure kernel in a higher virtual trust level for Hyper-V * tag 'hyperv-next-signed-20251207' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: (58 commits) mshv: Cleanly shutdown root partition with MSHV mshv: Use reboot notifier to configure sleep state mshv: Add definitions for MSHV sleep state configuration mshv: Add support for movable memory regions mshv: Add refcount and locking to mem regions mshv: Fix huge page handling in memory region traversal mshv: Move region management to mshv_regions.c mshv: Centralize guest memory region destruction mshv: Refactor and rename memory region handling functions mshv: adjust interrupt control structure for ARM64 Drivers: hv: use kmalloc_array() instead of kmalloc() mshv: Add ioctl for self targeted passthrough hvcalls Drivers: hv: Introduce mshv_vtl driver Drivers: hv: Export some symbols for mshv_vtl static_call: allow using STATIC_CALL_TRAMP_STR() from assembly mshv: Extend create partition ioctl to support cpu features mshv: Allow mappings that overlap in uaddr mshv: Fix create memory region overlap check mshv: add WQ_PERCPU to alloc_workqueue users Drivers: hv: Use kmalloc_array() instead of kmalloc() ...
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| @@ -26,6 +26,7 @@ enum { · 25 unmodified lines | ||
| 26 | 26 | MSHV_PT_BIT_LAPIC, |
| 27 | 27 | MSHV_PT_BIT_X2APIC, |
| 28 | 28 | MSHV_PT_BIT_GPA_SUPER_PAGES, |
| 29 | + MSHV_PT_BIT_CPU_AND_XSAVE_FEATURES, | |
| 29 | 30 | MSHV_PT_BIT_COUNT, |
| 30 | 31 | }; |
| 31 | 32 | |
| @@ -41,6 +42,8 @@ enum { · 9 unmodified lines | ||
| 41 | 42 | * @pt_flags: Bitmask of 1 << MSHV_PT_BIT_* |
| 42 | 43 | * @pt_isolation: MSHV_PT_ISOLATION_* |
| 43 | 44 | * |
| 45 | + * This is the initial/v1 version for backward compatibility. | |
| 46 | + * | |
| 44 | 47 | * Returns a file descriptor to act as a handle to a guest partition. |
| 45 | 48 | * At this point the partition is not yet initialized in the hypervisor. |
| 46 | 49 | * Some operations must be done with the partition in this state, e.g. setting |
| @@ -52,6 +55,37 @@ struct mshv_create_partition { · 5 unmodified lines | ||
| 52 | 55 | __u64 pt_isolation; |
| 53 | 56 | }; |
| 54 | 57 | |
| 58 | +#define MSHV_NUM_CPU_FEATURES_BANKS 2 | |
| 59 | + | |
| 60 | +/** | |
| 61 | + * struct mshv_create_partition_v2 | |
| 62 | + * | |
| 63 | + * This is extended version of the above initial MSHV_CREATE_PARTITION | |
| 64 | + * ioctl and allows for following additional parameters: | |
| 65 | + * | |
| 66 | + * @pt_num_cpu_fbanks: Must be set to MSHV_NUM_CPU_FEATURES_BANKS. | |
| 67 | + * @pt_cpu_fbanks: Disabled processor feature banks array. | |
| 68 | + * @pt_disabled_xsave: Disabled xsave feature bits. | |
| 69 | + * | |
| 70 | + * pt_cpu_fbanks and pt_disabled_xsave are passed through as-is to the create | |
| 71 | + * partition hypercall. | |
| 72 | + * | |
| 73 | + * Returns : same as above original mshv_create_partition | |
| 74 | + */ | |
| 75 | +struct mshv_create_partition_v2 { | |
| 76 | + __u64 pt_flags; | |
| 77 | + __u64 pt_isolation; | |
| 78 | + __u16 pt_num_cpu_fbanks; | |
| 79 | + __u8 pt_rsvd[6]; /* MBZ */ | |
| 80 | + __u64 pt_cpu_fbanks[MSHV_NUM_CPU_FEATURES_BANKS]; | |
| 81 | + __u64 pt_rsvd1[2]; /* MBZ */ | |
| 82 | +#if defined(__x86_64__) | |
| 83 | + __u64 pt_disabled_xsave; | |
| 84 | +#else | |
| 85 | + __u64 pt_rsvd2; /* MBZ */ | |
| 86 | +#endif | |
| 87 | +} __packed; | |
| 88 | + | |
| 55 | 89 | /* /dev/mshv */ |
| 56 | 90 | #define MSHV_CREATE_PARTITION _IOW(MSHV_IOCTL, 0x00, struct mshv_create_partition) |
| 57 | 91 | |
| @@ -89,7 +123,7 @@ enum { · 31 unmodified lines | ||
| 89 | 123 | * @rsvd: MBZ |
| 90 | 124 | * |
| 91 | 125 | * Map or unmap a region of userspace memory to Guest Physical Addresses (GPA). |
| 92 | − * Mappings can't overlap in GPA space or userspace. | |
| 126 | + * Mappings can't overlap in GPA space. | |
| 93 | 127 | * To unmap, these fields must match an existing mapping. |
| 94 | 128 | */ |
| 95 | 129 | struct mshv_user_mem_region { |
| @@ -288,4 +322,84 @@ struct mshv_get_set_vp_state { · 192 unmodified lines | ||
| 288 | 322 | * #define MSHV_ROOT_HVCALL _IOWR(MSHV_IOCTL, 0x07, struct mshv_root_hvcall) |
| 289 | 323 | */ |
| 290 | 324 | |
| 325 | +/* Structure definitions, macros and IOCTLs for mshv_vtl */ | |
| 326 | + | |
| 327 | +#define MSHV_CAP_CORE_API_STABLE 0x0 | |
| 328 | +#define MSHV_CAP_REGISTER_PAGE 0x1 | |
| 329 | +#define MSHV_CAP_VTL_RETURN_ACTION 0x2 | |
| 330 | +#define MSHV_CAP_DR6_SHARED 0x3 | |
| 331 | +#define MSHV_MAX_RUN_MSG_SIZE 256 | |
| 332 | + | |
| 333 | +struct mshv_vp_registers { | |
| 334 | + __u32 count; /* supports only 1 register at a time */ | |
| 335 | + __u32 reserved; /* Reserved for alignment or future use */ | |
| 336 | + __u64 regs_ptr; /* pointer to struct hv_register_assoc */ | |
| 337 | +}; | |
| 338 | + | |
| 339 | +struct mshv_vtl_set_eventfd { | |
| 340 | + __s32 fd; | |
| 341 | + __u32 flag; | |
| 342 | +}; | |
| 343 | + | |
| 344 | +struct mshv_vtl_signal_event { | |
| 345 | + __u32 connection_id; | |
| 346 | + __u32 flag; | |
| 347 | +}; | |
| 348 | + | |
| 349 | +struct mshv_vtl_sint_post_msg { | |
| 350 | + __u64 message_type; | |
| 351 | + __u32 connection_id; | |
| 352 | + __u32 payload_size; /* Must not exceed HV_MESSAGE_PAYLOAD_BYTE_COUNT */ | |
| 353 | + __u64 payload_ptr; /* pointer to message payload (bytes) */ | |
| 354 | +}; | |
| 355 | + | |
| 356 | +struct mshv_vtl_ram_disposition { | |
| 357 | + __u64 start_pfn; | |
| 358 | + __u64 last_pfn; | |
| 359 | +}; | |
| 360 | + | |
| 361 | +struct mshv_vtl_set_poll_file { | |
| 362 | + __u32 cpu; | |
| 363 | + __u32 fd; | |
| 364 | +}; | |
| 365 | + | |
| 366 | +struct mshv_vtl_hvcall_setup { | |
| 367 | + __u64 bitmap_array_size; /* stores number of bytes */ | |
| 368 | + __u64 allow_bitmap_ptr; | |
| 369 | +}; | |
| 370 | + | |
| 371 | +struct mshv_vtl_hvcall { | |
| 372 | + __u64 control; /* Hypercall control code */ | |
| 373 | + __u64 input_size; /* Size of the input data */ | |
| 374 | + __u64 input_ptr; /* Pointer to the input struct */ | |
| 375 | + __u64 status; /* Status of the hypercall (output) */ | |
| 376 | + __u64 output_size; /* Size of the output data */ | |
| 377 | + __u64 output_ptr; /* Pointer to the output struct */ | |
| 378 | +}; | |
| 379 | + | |
| 380 | +struct mshv_sint_mask { | |
| 381 | + __u8 mask; | |
| 382 | + __u8 reserved[7]; | |
| 383 | +}; | |
| 384 | + | |
| 385 | +/* /dev/mshv device IOCTL */ | |
| 386 | +#define MSHV_CHECK_EXTENSION _IOW(MSHV_IOCTL, 0x00, __u32) | |
| 387 | + | |
| 388 | +/* vtl device */ | |
| 389 | +#define MSHV_CREATE_VTL _IOR(MSHV_IOCTL, 0x1D, char) | |
| 390 | +#define MSHV_ADD_VTL0_MEMORY _IOW(MSHV_IOCTL, 0x21, struct mshv_vtl_ram_disposition) | |
| 391 | +#define MSHV_SET_POLL_FILE _IOW(MSHV_IOCTL, 0x25, struct mshv_vtl_set_poll_file) | |
| 392 | +#define MSHV_RETURN_TO_LOWER_VTL _IO(MSHV_IOCTL, 0x27) | |
| 393 | +#define MSHV_GET_VP_REGISTERS _IOWR(MSHV_IOCTL, 0x05, struct mshv_vp_registers) | |
| 394 | +#define MSHV_SET_VP_REGISTERS _IOW(MSHV_IOCTL, 0x06, struct mshv_vp_registers) | |
| 395 | + | |
| 396 | +/* VMBus device IOCTLs */ | |
| 397 | +#define MSHV_SINT_SIGNAL_EVENT _IOW(MSHV_IOCTL, 0x22, struct mshv_vtl_signal_event) | |
| 398 | +#define MSHV_SINT_POST_MESSAGE _IOW(MSHV_IOCTL, 0x23, struct mshv_vtl_sint_post_msg) | |
| 399 | +#define MSHV_SINT_SET_EVENTFD _IOW(MSHV_IOCTL, 0x24, struct mshv_vtl_set_eventfd) | |
| 400 | +#define MSHV_SINT_PAUSE_MESSAGE_STREAM _IOW(MSHV_IOCTL, 0x25, struct mshv_sint_mask) | |
| 401 | + | |
| 402 | +/* hv_hvcall device */ | |
| 403 | +#define MSHV_HVCALL_SETUP _IOW(MSHV_IOCTL, 0x1E, struct mshv_vtl_hvcall_setup) | |
| 404 | +#define MSHV_HVCALL _IOWR(MSHV_IOCTL, 0x1F, struct mshv_vtl_hvcall) | |
| 291 | 405 | #endif |