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accel/mshv: Initialize VM partition

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Create the MSHV virtual machine by opening a partition and issuing
the necessary ioctl to initialize it. This sets up the basic VM
structure and initial configuration used by MSHV to manage guest state.

Signed-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com>
Link: https://lore.kernel.org/r/20250916164847.77883-10-magnuskulke@linux.microsoft.com
[Add stubs; fix format strings for trace-events; make mshv_hvcall
 available only in per-target files; mshv.h/mshv_int.h split. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Magnus Kulke 2025-10-02 18:28:16 +02:00 • committed by Paolo Bonzini
parent 5006ea1344
commit c5f23bccde
14 changed files with 1054 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

11
include/system/mshv.h
View file

@ -31,18 +31,27 @@
#define CONFIG_MSHV_IS_POSSIBLE
#endif
#define MSHV_MAX_MSI_ROUTES 4096
#define MSHV_PAGE_SHIFT 12
#ifdef CONFIG_MSHV_IS_POSSIBLE
extern bool mshv_allowed;
#define mshv_enabled() (mshv_allowed)
#define mshv_msi_via_irqfd_enabled() mshv_enabled()
#else /* CONFIG_MSHV_IS_POSSIBLE */
#define mshv_enabled() false
#endif
#define mshv_msi_via_irqfd_enabled() false
#endif
typedef struct MshvState MshvState;
extern MshvState *mshv_state;
/* interrupt */
int mshv_request_interrupt(MshvState *mshv_state, uint32_t interrupt_type, uint32_t vector,
uint32_t vp_index, bool logical_destination_mode,
bool level_triggered);
int mshv_irqchip_add_msi_route(int vector, PCIDevice *dev);
int mshv_irqchip_update_msi_route(int virq, MSIMessage msg, PCIDevice *dev);
void mshv_irqchip_commit_routes(void);

25
include/system/mshv_int.h
View file

@ -36,10 +36,35 @@ struct MshvState {
/* number of listeners */
int nr_as;
MshvAddressSpace *as;
int fd;
};
typedef struct MshvMsiControl {
bool updated;
GHashTable *gsi_routes;
} MshvMsiControl;
void mshv_arch_amend_proc_features(
union hv_partition_synthetic_processor_features *features);
int mshv_arch_post_init_vm(int vm_fd);
#if defined COMPILING_PER_TARGET && defined CONFIG_MSHV_IS_POSSIBLE
int mshv_hvcall(int fd, const struct mshv_root_hvcall *args);
#endif
/* memory */
typedef struct MshvMemoryRegion {
uint64_t guest_phys_addr;
uint64_t memory_size;
uint64_t userspace_addr;
bool readonly;
} MshvMemoryRegion;
void mshv_set_phys_mem(MshvMemoryListener *mml, MemoryRegionSection *section,
bool add);
/* interrupt */
void mshv_init_msicontrol(void);
int mshv_reserve_ioapic_msi_routes(int vm_fd);
#endif