archives/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-03-13 23:46:14 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

hyperv-next for v6.19

Browse source 
-----BEGIN PGP SIGNATURE-----
 
 iQFHBAABCgAxFiEEIbPD0id6easf0xsudhRwX5BBoF4FAmk2b0ITHHdlaS5saXVA
 a2VybmVsLm9yZwAKCRB2FHBfkEGgXkefCACpUWTK0U0i47hXT+s4aA0T3sq6V3/T
 +su9WnT3GPQ3BuRCRk51w6u9ADYt1EXtu8gRwq/wZiES9PJtz+9DmNuLT8nkkHXH
 exbaRIBAiwLGg6QFC2VpbQzeHLp7qeko0MsLWyMiVPkw+lw9QPqcLKVEWuzPZfOn
 UCkPB+XpzZg9Ft4vKRjXLyUMpwKzkqJw/aiXMfwonuaelcrzLw0hkzO3/I+eKRHv
 JKxaHCwLgrPZyGCJpWtwiLxgu0DKLeDDhj0WSqDz/kUNhjo/GEshLA25UQJUdzI0
 O+tFN9my7SZSYtq7fGoyfo16mAsLaXh0oYuwP8UnR4CDm4UF4JB4QTsM
 =laZR
 -----END PGP SIGNATURE-----

Merge tag 'hyperv-next-signed-20251207' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

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()
  ...
This commit is contained in:
Linus Torvalds 2025-12-09 06:10:17 +09:00
commit feb06d2690
42 changed files with 5013 additions and 702 deletions
Download patch file Download diff file Expand all files Collapse all files

116
include/uapi/linux/mshv.h
View file

@ -26,6 +26,7 @@ enum {
MSHV_PT_BIT_LAPIC,
MSHV_PT_BIT_X2APIC,
MSHV_PT_BIT_GPA_SUPER_PAGES,
MSHV_PT_BIT_CPU_AND_XSAVE_FEATURES,
MSHV_PT_BIT_COUNT,
};
@ -41,6 +42,8 @@ enum {
* @pt_flags: Bitmask of 1 << MSHV_PT_BIT_*
* @pt_isolation: MSHV_PT_ISOLATION_*
*
* This is the initial/v1 version for backward compatibility.
*
* Returns a file descriptor to act as a handle to a guest partition.
* At this point the partition is not yet initialized in the hypervisor.
* Some operations must be done with the partition in this state, e.g. setting
@ -52,6 +55,37 @@ struct mshv_create_partition {
__u64 pt_isolation;
};
#define MSHV_NUM_CPU_FEATURES_BANKS 2
/**
* struct mshv_create_partition_v2
*
* This is extended version of the above initial MSHV_CREATE_PARTITION
* ioctl and allows for following additional parameters:
*
* @pt_num_cpu_fbanks: Must be set to MSHV_NUM_CPU_FEATURES_BANKS.
* @pt_cpu_fbanks: Disabled processor feature banks array.
* @pt_disabled_xsave: Disabled xsave feature bits.
*
* pt_cpu_fbanks and pt_disabled_xsave are passed through as-is to the create
* partition hypercall.
*
* Returns : same as above original mshv_create_partition
*/
struct mshv_create_partition_v2 {
__u64 pt_flags;
__u64 pt_isolation;
__u16 pt_num_cpu_fbanks;
__u8 pt_rsvd[6]; /* MBZ */
__u64 pt_cpu_fbanks[MSHV_NUM_CPU_FEATURES_BANKS];
__u64 pt_rsvd1[2]; /* MBZ */
#if defined(__x86_64__)
__u64 pt_disabled_xsave;
#else
__u64 pt_rsvd2; /* MBZ */
#endif
} __packed;
/* /dev/mshv */
#define MSHV_CREATE_PARTITION _IOW(MSHV_IOCTL, 0x00, struct mshv_create_partition)
@ -89,7 +123,7 @@ enum {
* @rsvd: MBZ
*
* Map or unmap a region of userspace memory to Guest Physical Addresses (GPA).
* Mappings can't overlap in GPA space or userspace.
* Mappings can't overlap in GPA space.
* To unmap, these fields must match an existing mapping.
*/
struct mshv_user_mem_region {
@ -288,4 +322,84 @@ struct mshv_get_set_vp_state {
* #define MSHV_ROOT_HVCALL _IOWR(MSHV_IOCTL, 0x07, struct mshv_root_hvcall)
*/
/* Structure definitions, macros and IOCTLs for mshv_vtl */
#define MSHV_CAP_CORE_API_STABLE 0x0
#define MSHV_CAP_REGISTER_PAGE 0x1
#define MSHV_CAP_VTL_RETURN_ACTION 0x2
#define MSHV_CAP_DR6_SHARED 0x3
#define MSHV_MAX_RUN_MSG_SIZE 256
struct mshv_vp_registers {
__u32 count; /* supports only 1 register at a time */
__u32 reserved; /* Reserved for alignment or future use */
__u64 regs_ptr; /* pointer to struct hv_register_assoc */
};
struct mshv_vtl_set_eventfd {
__s32 fd;
__u32 flag;
};
struct mshv_vtl_signal_event {
__u32 connection_id;
__u32 flag;
};
struct mshv_vtl_sint_post_msg {
__u64 message_type;
__u32 connection_id;
__u32 payload_size; /* Must not exceed HV_MESSAGE_PAYLOAD_BYTE_COUNT */
__u64 payload_ptr; /* pointer to message payload (bytes) */
};
struct mshv_vtl_ram_disposition {
__u64 start_pfn;
__u64 last_pfn;
};
struct mshv_vtl_set_poll_file {
__u32 cpu;
__u32 fd;
};
struct mshv_vtl_hvcall_setup {
__u64 bitmap_array_size; /* stores number of bytes */
__u64 allow_bitmap_ptr;
};
struct mshv_vtl_hvcall {
__u64 control; /* Hypercall control code */
__u64 input_size; /* Size of the input data */
__u64 input_ptr; /* Pointer to the input struct */
__u64 status; /* Status of the hypercall (output) */
__u64 output_size; /* Size of the output data */
__u64 output_ptr; /* Pointer to the output struct */
};
struct mshv_sint_mask {
__u8 mask;
__u8 reserved[7];
};
/* /dev/mshv device IOCTL */
#define MSHV_CHECK_EXTENSION _IOW(MSHV_IOCTL, 0x00, __u32)
/* vtl device */
#define MSHV_CREATE_VTL _IOR(MSHV_IOCTL, 0x1D, char)
#define MSHV_ADD_VTL0_MEMORY _IOW(MSHV_IOCTL, 0x21, struct mshv_vtl_ram_disposition)
#define MSHV_SET_POLL_FILE _IOW(MSHV_IOCTL, 0x25, struct mshv_vtl_set_poll_file)
#define MSHV_RETURN_TO_LOWER_VTL _IO(MSHV_IOCTL, 0x27)
#define MSHV_GET_VP_REGISTERS _IOWR(MSHV_IOCTL, 0x05, struct mshv_vp_registers)
#define MSHV_SET_VP_REGISTERS _IOW(MSHV_IOCTL, 0x06, struct mshv_vp_registers)
/* VMBus device IOCTLs */
#define MSHV_SINT_SIGNAL_EVENT _IOW(MSHV_IOCTL, 0x22, struct mshv_vtl_signal_event)
#define MSHV_SINT_POST_MESSAGE _IOW(MSHV_IOCTL, 0x23, struct mshv_vtl_sint_post_msg)
#define MSHV_SINT_SET_EVENTFD _IOW(MSHV_IOCTL, 0x24, struct mshv_vtl_set_eventfd)
#define MSHV_SINT_PAUSE_MESSAGE_STREAM _IOW(MSHV_IOCTL, 0x25, struct mshv_sint_mask)
/* hv_hvcall device */
#define MSHV_HVCALL_SETUP _IOW(MSHV_IOCTL, 0x1E, struct mshv_vtl_hvcall_setup)
#define MSHV_HVCALL _IOWR(MSHV_IOCTL, 0x1F, struct mshv_vtl_hvcall)
#endif