1 /* SPDX-License-Identifier: GPL-2.0-only */
4 * Copyright IBM Corp. 2007
6 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
9 #ifndef __POWERPC_KVM_HOST_H__
10 #define __POWERPC_KVM_HOST_H__
12 #include <linux/mutex.h>
13 #include <linux/hrtimer.h>
14 #include <linux/interrupt.h>
15 #include <linux/types.h>
16 #include <linux/kvm_types.h>
17 #include <linux/threads.h>
18 #include <linux/spinlock.h>
19 #include <linux/kvm_para.h>
20 #include <linux/list.h>
21 #include <linux/atomic.h>
22 #include <asm/kvm_asm.h>
23 #include <asm/processor.h>
25 #include <asm/cacheflush.h>
26 #include <asm/hvcall.h>
29 #define KVM_MAX_VCPUS NR_CPUS
30 #define KVM_MAX_VCORES NR_CPUS
32 #include <asm/cputhreads.h>
34 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
35 #include <asm/kvm_book3s_asm.h> /* for MAX_SMT_THREADS */
36 #define KVM_MAX_VCPU_IDS (MAX_SMT_THREADS * KVM_MAX_VCORES)
37 #define KVM_MAX_NESTED_GUESTS KVMPPC_NR_LPIDS
40 #define KVM_MAX_VCPU_IDS KVM_MAX_VCPUS
41 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
43 #define __KVM_HAVE_ARCH_INTC_INITIALIZED
45 #define KVM_HALT_POLL_NS_DEFAULT 10000 /* 10 us */
47 /* These values are internal and can be increased later */
48 #define KVM_NR_IRQCHIPS 1
49 #define KVM_IRQCHIP_NUM_PINS 256
51 /* PPC-specific vcpu->requests bit members */
52 #define KVM_REQ_WATCHDOG KVM_ARCH_REQ(0)
53 #define KVM_REQ_EPR_EXIT KVM_ARCH_REQ(1)
54 #define KVM_REQ_PENDING_TIMER KVM_ARCH_REQ(2)
56 #include <linux/mmu_notifier.h>
58 #define KVM_ARCH_WANT_MMU_NOTIFIER
60 #define HPTEG_CACHE_NUM (1 << 15)
61 #define HPTEG_HASH_BITS_PTE 13
62 #define HPTEG_HASH_BITS_PTE_LONG 12
63 #define HPTEG_HASH_BITS_VPTE 13
64 #define HPTEG_HASH_BITS_VPTE_LONG 5
65 #define HPTEG_HASH_BITS_VPTE_64K 11
66 #define HPTEG_HASH_NUM_PTE (1 << HPTEG_HASH_BITS_PTE)
67 #define HPTEG_HASH_NUM_PTE_LONG (1 << HPTEG_HASH_BITS_PTE_LONG)
68 #define HPTEG_HASH_NUM_VPTE (1 << HPTEG_HASH_BITS_VPTE)
69 #define HPTEG_HASH_NUM_VPTE_LONG (1 << HPTEG_HASH_BITS_VPTE_LONG)
70 #define HPTEG_HASH_NUM_VPTE_64K (1 << HPTEG_HASH_BITS_VPTE_64K)
72 /* Physical Address Mask - allowed range of real mode RAM access */
73 #define KVM_PAM 0x0fffffffffffffffULL
79 struct kvmppc_vcpu_book3s;
80 struct kvmppc_book3s_shadow_vcpu;
81 struct kvm_nested_guest;
84 struct kvm_vm_stat_generic generic;
89 struct kvm_vcpu_stat {
90 struct kvm_vcpu_stat_generic generic;
95 /* Account for special types of light exits: */
96 u64 itlb_real_miss_exits;
97 u64 itlb_virt_miss_exits;
98 u64 dtlb_real_miss_exits;
99 u64 dtlb_virt_miss_exits;
103 u64 emulated_inst_exits;
106 u64 halt_successful_wait;
111 #ifdef CONFIG_PPC_BOOK3S
125 enum kvm_exit_types {
128 ITLB_REAL_MISS_EXITS,
129 ITLB_VIRT_MISS_EXITS,
130 DTLB_REAL_MISS_EXITS,
131 DTLB_VIRT_MISS_EXITS,
136 EMULATED_MTMSRWE_EXITS,
137 EMULATED_WRTEE_EXITS,
138 EMULATED_MTSPR_EXITS,
139 EMULATED_MFSPR_EXITS,
140 EMULATED_MTMSR_EXITS,
141 EMULATED_MFMSR_EXITS,
142 EMULATED_TLBSX_EXITS,
143 EMULATED_TLBWE_EXITS,
156 __NUMBER_OF_KVM_EXIT_TYPES
159 /* allow access to big endian 32bit upper/lower parts and 64bit var */
160 struct kvmppc_exit_timing {
169 struct kvmppc_pginfo {
174 struct kvmppc_spapr_tce_iommu_table {
176 struct list_head next;
177 struct iommu_table *tbl;
181 #define TCES_PER_PAGE (PAGE_SIZE / sizeof(u64))
183 struct kvmppc_spapr_tce_table {
184 struct list_head list;
189 u64 offset; /* in pages */
190 u64 size; /* window size in pages */
191 struct list_head iommu_tables;
192 struct mutex alloc_lock;
193 struct page *pages[];
196 /* XICS components, defined in book3s_xics.c */
199 extern struct kvm_device_ops kvm_xics_ops;
201 /* XIVE components, defined in book3s_xive.c */
203 struct kvmppc_xive_vcpu;
204 extern struct kvm_device_ops kvm_xive_ops;
205 extern struct kvm_device_ops kvm_xive_native_ops;
207 struct kvmppc_passthru_irqmap;
210 * The reverse mapping array has one entry for each HPTE,
211 * which stores the guest's view of the second word of the HPTE
212 * (including the guest physical address of the mapping),
213 * plus forward and backward pointers in a doubly-linked ring
214 * of HPTEs that map the same host page. The pointers in this
215 * ring are 32-bit HPTE indexes, to save space.
217 struct revmap_entry {
218 unsigned long guest_rpte;
219 unsigned int forw, back;
223 * The rmap array of size number of guest pages is allocated for each memslot.
224 * This array is used to store usage specific information about the guest page.
225 * Below are the encodings of the various possible usage types.
227 /* Free bits which can be used to define a new usage */
228 #define KVMPPC_RMAP_TYPE_MASK 0xff00000000000000
229 #define KVMPPC_RMAP_NESTED 0xc000000000000000 /* Nested rmap array */
230 #define KVMPPC_RMAP_HPT 0x0100000000000000 /* HPT guest */
233 * rmap usage definition for a hash page table (hpt) guest:
234 * 0x0000080000000000 Lock bit
235 * 0x0000018000000000 RC bits
236 * 0x0000000100000000 Present bit
237 * 0x00000000ffffffff HPT index bits
238 * The bottom 32 bits are the index in the guest HPT of a HPTE that points to
241 #define KVMPPC_RMAP_LOCK_BIT 43
242 #define KVMPPC_RMAP_RC_SHIFT 32
243 #define KVMPPC_RMAP_REFERENCED (HPTE_R_R << KVMPPC_RMAP_RC_SHIFT)
244 #define KVMPPC_RMAP_PRESENT 0x100000000ul
245 #define KVMPPC_RMAP_INDEX 0xfffffffful
247 struct kvm_arch_memory_slot {
248 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
250 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
253 struct kvm_hpt_info {
254 /* Host virtual (linear mapping) address of guest HPT */
256 /* Array of reverse mapping entries for each guest HPTE */
257 struct revmap_entry *rev;
258 /* Guest HPT size is 2**(order) bytes */
260 /* 1 if HPT allocated with CMA, 0 otherwise */
264 struct kvm_resize_hpt;
266 /* Flag values for kvm_arch.secure_guest */
267 #define KVMPPC_SECURE_INIT_START 0x1 /* H_SVM_INIT_START has been called */
268 #define KVMPPC_SECURE_INIT_DONE 0x2 /* H_SVM_INIT_DONE completed */
269 #define KVMPPC_SECURE_INIT_ABORT 0x4 /* H_SVM_INIT_ABORT issued */
273 unsigned int smt_mode; /* # vcpus per virtual core */
274 unsigned int emul_smt_mode; /* emualted SMT mode, on P9 */
275 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
276 unsigned int tlb_sets;
277 struct kvm_hpt_info hpt;
278 atomic64_t mmio_update;
279 unsigned int host_lpid;
280 unsigned long host_lpcr;
282 unsigned long host_sdr1;
284 unsigned long vrma_slb_v;
286 atomic_t vcpus_running;
288 atomic_t hpte_mod_interest;
289 cpumask_t need_tlb_flush;
298 struct dentry *debugfs_dir;
299 struct kvm_resize_hpt *resize_hpt; /* protected by kvm->lock */
300 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
301 #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
302 struct mutex hpt_mutex;
304 #ifdef CONFIG_PPC_BOOK3S_64
305 struct list_head spapr_tce_tables;
306 struct list_head rtas_tokens;
307 struct mutex rtas_token_lock;
308 DECLARE_BITMAP(enabled_hcalls, MAX_HCALL_OPCODE/4 + 1);
310 #ifdef CONFIG_KVM_MPIC
311 struct openpic *mpic;
313 #ifdef CONFIG_KVM_XICS
314 struct kvmppc_xics *xics;
315 struct kvmppc_xics *xics_device;
316 struct kvmppc_xive *xive; /* Current XIVE device in use */
318 struct kvmppc_xive *native;
319 struct kvmppc_xive *xics_on_xive;
321 struct kvmppc_passthru_irqmap *pimap;
323 struct kvmppc_ops *kvm_ops;
324 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
325 struct mutex uvmem_lock;
326 struct list_head uvmem_pfns;
327 struct mutex mmu_setup_lock; /* nests inside vcpu mutexes */
330 struct kvm_nested_guest *nested_guests[KVM_MAX_NESTED_GUESTS];
331 /* This array can grow quite large, keep it at the end */
332 struct kvmppc_vcore *vcores[KVM_MAX_VCORES];
336 #define VCORE_ENTRY_MAP(vc) ((vc)->entry_exit_map & 0xff)
337 #define VCORE_EXIT_MAP(vc) ((vc)->entry_exit_map >> 8)
338 #define VCORE_IS_EXITING(vc) (VCORE_EXIT_MAP(vc) != 0)
340 /* This bit is used when a vcore exit is triggered from outside the vcore */
341 #define VCORE_EXIT_REQ 0x10000
344 * Values for vcore_state.
345 * Note that these are arranged such that lower values
346 * (< VCORE_SLEEPING) don't require stolen time accounting
347 * on load/unload, and higher values do.
349 #define VCORE_INACTIVE 0
350 #define VCORE_PREEMPT 1
351 #define VCORE_PIGGYBACK 2
352 #define VCORE_SLEEPING 3
353 #define VCORE_RUNNING 4
354 #define VCORE_EXITING 5
355 #define VCORE_POLLING 6
358 * Struct used to manage memory for a virtual processor area
359 * registered by a PAPR guest. There are three types of area
360 * that a guest can register.
363 unsigned long gpa; /* Current guest phys addr */
364 void *pinned_addr; /* Address in kernel linear mapping */
365 void *pinned_end; /* End of region */
366 unsigned long next_gpa; /* Guest phys addr for update */
367 unsigned long len; /* Number of bytes required */
368 u8 update_pending; /* 1 => update pinned_addr from next_gpa */
369 bool dirty; /* true => area has been modified by kernel */
378 bool may_execute : 1;
381 u8 page_size; /* MMU_PAGE_xxx */
387 void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs);
388 u64 (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr);
389 u64 (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr);
390 int (*slbfee)(struct kvm_vcpu *vcpu, gva_t eaddr, ulong *ret_slb);
391 void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr);
392 void (*slbia)(struct kvm_vcpu *vcpu);
394 void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value);
395 u32 (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum);
396 int (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr,
397 struct kvmppc_pte *pte, bool data, bool iswrite);
398 void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large);
399 int (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid);
400 u64 (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data);
401 bool (*is_dcbz32)(struct kvm_vcpu *vcpu);
413 bool large : 1; /* PTEs are 16MB */
414 bool tb : 1; /* 1TB segment */
416 u8 base_page_size; /* MMU_PAGE_xxx */
419 /* Struct used to accumulate timing information in HV real mode code */
420 struct kvmhv_tb_accumulator {
421 u64 seqcount; /* used to synchronize access, also count * 2 */
422 u64 tb_total; /* total time in timebase ticks */
423 u64 tb_min; /* min time */
424 u64 tb_max; /* max time */
427 #ifdef CONFIG_PPC_BOOK3S_64
428 struct kvmppc_irq_map {
431 struct irq_desc *desc;
434 #define KVMPPC_PIRQ_MAPPED 1024
435 struct kvmppc_passthru_irqmap {
437 struct kvmppc_irq_map mapped[KVMPPC_PIRQ_MAPPED];
441 # ifdef CONFIG_PPC_FSL_BOOK3E
442 #define KVMPPC_BOOKE_IAC_NUM 2
443 #define KVMPPC_BOOKE_DAC_NUM 2
445 #define KVMPPC_BOOKE_IAC_NUM 4
446 #define KVMPPC_BOOKE_DAC_NUM 2
448 #define KVMPPC_BOOKE_MAX_IAC 4
449 #define KVMPPC_BOOKE_MAX_DAC 2
451 /* KVMPPC_EPR_USER takes precedence over KVMPPC_EPR_KERNEL */
452 #define KVMPPC_EPR_NONE 0 /* EPR not supported */
453 #define KVMPPC_EPR_USER 1 /* exit to userspace to fill EPR */
454 #define KVMPPC_EPR_KERNEL 2 /* in-kernel irqchip */
456 #define KVMPPC_IRQ_DEFAULT 0
457 #define KVMPPC_IRQ_MPIC 1
458 #define KVMPPC_IRQ_XICS 2 /* Includes a XIVE option */
459 #define KVMPPC_IRQ_XIVE 3 /* XIVE native exploitation mode */
461 #define MMIO_HPTE_CACHE_SIZE 4
463 struct mmio_hpte_cache_entry {
464 unsigned long hpte_v;
465 unsigned long hpte_r;
467 unsigned long pte_index;
471 unsigned int slb_base_pshift;
474 struct mmio_hpte_cache {
475 struct mmio_hpte_cache_entry entry[MMIO_HPTE_CACHE_SIZE];
479 #define KVMPPC_VSX_COPY_NONE 0
480 #define KVMPPC_VSX_COPY_WORD 1
481 #define KVMPPC_VSX_COPY_DWORD 2
482 #define KVMPPC_VSX_COPY_DWORD_LOAD_DUMP 3
483 #define KVMPPC_VSX_COPY_WORD_LOAD_DUMP 4
485 #define KVMPPC_VMX_COPY_BYTE 8
486 #define KVMPPC_VMX_COPY_HWORD 9
487 #define KVMPPC_VMX_COPY_WORD 10
488 #define KVMPPC_VMX_COPY_DWORD 11
492 /* W0 and W1 of a XIVE thread management context */
507 struct kvm_vcpu_arch {
510 #ifdef CONFIG_PPC_BOOK3S
511 struct kvmppc_slb slb[64];
512 int slb_max; /* 1 + index of last valid entry in slb[] */
513 int slb_nr; /* total number of entries in SLB */
514 struct kvmppc_mmu mmu;
515 struct kvmppc_vcpu_book3s *book3s;
517 #ifdef CONFIG_PPC_BOOK3S_32
518 struct kvmppc_book3s_shadow_vcpu *shadow_vcpu;
523 struct thread_fp_state fp;
531 #ifdef CONFIG_ALTIVEC
532 struct thread_vr_state vr;
535 #ifdef CONFIG_KVM_BOOKE_HV
545 #if defined(CONFIG_BOOKE)
546 #if defined(CONFIG_KVM_BOOKE_HV) || defined(CONFIG_64BIT)
551 #ifdef CONFIG_PPC_BOOK3S
552 /* For Gekko paired singles */
556 #ifdef CONFIG_PPC_BOOK3S
560 #ifdef CONFIG_PPC_BOOK3S
562 ulong guest_owned_ext;
582 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
600 u32 vrsave; /* also USPRG0 */
602 /* shadow_msr is unused for BookE HV */
615 /* Time base value when we entered the guest */
620 ulong tsr; /* we need to perform set/clr_bits() which requires ulong */
634 u64 mmcr[4]; /* MMCR0, MMCR1, MMCR2, MMCR3 */
642 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
659 struct thread_fp_state fp_tm;
661 struct thread_vr_state vr_tm;
662 u32 vrsave_tm; /* also USPRG0 */
665 #ifdef CONFIG_KVM_EXIT_TIMING
666 struct mutex exit_timing_lock;
667 struct kvmppc_exit_timing timing_exit;
668 struct kvmppc_exit_timing timing_last_enter;
670 u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES];
671 u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES];
672 u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES];
673 u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES];
674 u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES];
675 u64 timing_last_exit;
676 struct dentry *debugfs_exit_timing;
679 #ifdef CONFIG_PPC_BOOK3S
682 unsigned long intr_msr;
684 * POWER9 and later: fault_gpa contains the guest real address of page
685 * fault for a radix guest, or segment descriptor (equivalent to result
686 * from slbmfev of SLB entry that translated the EA) for hash guests.
697 struct timer_list wdt_timer;
706 /* guest debug registers*/
707 struct debug_reg dbg_reg;
709 gpa_t paddr_accessed;
710 gva_t vaddr_accessed;
713 u16 io_gpr; /* GPR used as IO source/target */
714 u8 mmio_host_swabbed;
716 /* conversion between single and double precision */
719 * Number of simulations for vsx.
720 * If we use 2*8bytes to simulate 1*16bytes,
721 * then the number should be 2 and
722 * mmio_copy_type=KVMPPC_VSX_COPY_DWORD.
723 * If we use 4*4bytes to simulate 1*16bytes,
724 * the number should be 4 and
725 * mmio_vsx_copy_type=KVMPPC_VSX_COPY_WORD.
727 u8 mmio_vsx_copy_nums;
729 u8 mmio_vmx_copy_nums;
739 u8 epr_flags; /* KVMPPC_EPR_xxx */
741 u8 external_oneshot; /* clear external irq after delivery */
743 u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */
745 struct hrtimer dec_timer;
747 u64 dec_expires; /* Relative to guest timebase. */
748 unsigned long pending_exceptions;
752 u8 irq_pending; /* Used by XIVE to signal pending guest irqs */
756 struct rcuwait *waitp;
757 struct kvmppc_vcore *vcore;
765 wait_queue_head_t cpu_run;
766 struct machine_check_event mce_evt; /* Valid if trap == 0x200 */
768 struct kvm_vcpu_arch_shared *shared;
769 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
770 bool shared_big_endian;
772 unsigned long magic_page_pa; /* phys addr to map the magic page to */
773 unsigned long magic_page_ea; /* effect. addr to map the magic page to */
774 bool disable_kernel_nx;
776 int irq_type; /* one of KVM_IRQ_* */
778 struct openpic *mpic; /* KVM_IRQ_MPIC */
779 #ifdef CONFIG_KVM_XICS
780 struct kvmppc_icp *icp; /* XICS presentation controller */
781 struct kvmppc_xive_vcpu *xive_vcpu; /* XIVE virtual CPU data */
782 __be32 xive_cam_word; /* Cooked W2 in proper endian with valid bit */
783 u8 xive_pushed; /* Is the VP pushed on the physical CPU ? */
784 u8 xive_esc_on; /* Is the escalation irq enabled ? */
785 union xive_tma_w01 xive_saved_state; /* W0..1 of XIVE thread state */
786 u64 xive_esc_raddr; /* Escalation interrupt ESB real addr */
787 u64 xive_esc_vaddr; /* Escalation interrupt ESB virt addr */
790 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
791 struct kvm_vcpu_arch_shared shregs;
793 struct mmio_hpte_cache mmio_cache;
794 unsigned long pgfault_addr;
796 unsigned long pgfault_hpte[2];
797 struct mmio_hpte_cache_entry *pgfault_cache;
799 struct task_struct *run_task;
801 spinlock_t vpa_update_lock;
802 struct kvmppc_vpa vpa;
803 struct kvmppc_vpa dtl;
804 struct dtl_entry *dtl_ptr;
805 unsigned long dtl_index;
807 struct kvmppc_vpa slb_shadow;
809 spinlock_t tbacct_lock;
817 u64 hfscr_permitted; /* A mask of permitted HFSCR facilities */
819 /* For support of nested guests */
820 struct kvm_nested_guest *nested;
825 #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
826 struct kvmhv_tb_accumulator *cur_activity; /* What we're timing */
827 u64 cur_tb_start; /* when it started */
828 struct kvmhv_tb_accumulator rm_entry; /* real-mode entry code */
829 struct kvmhv_tb_accumulator rm_intr; /* real-mode intr handling */
830 struct kvmhv_tb_accumulator rm_exit; /* real-mode exit code */
831 struct kvmhv_tb_accumulator guest_time; /* guest execution */
832 struct kvmhv_tb_accumulator cede_time; /* time napping inside guest */
834 struct dentry *debugfs_dir;
835 #endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
838 #define VCPU_FPR(vcpu, i) (vcpu)->arch.fp.fpr[i][TS_FPROFFSET]
839 #define VCPU_VSX_FPR(vcpu, i, j) ((vcpu)->arch.fp.fpr[i][j])
840 #define VCPU_VSX_VR(vcpu, i) ((vcpu)->arch.vr.vr[i])
842 /* Values for vcpu->arch.state */
843 #define KVMPPC_VCPU_NOTREADY 0
844 #define KVMPPC_VCPU_RUNNABLE 1
845 #define KVMPPC_VCPU_BUSY_IN_HOST 2
847 /* Values for vcpu->arch.io_gpr */
848 #define KVM_MMIO_REG_MASK 0x003f
849 #define KVM_MMIO_REG_EXT_MASK 0xffc0
850 #define KVM_MMIO_REG_GPR 0x0000
851 #define KVM_MMIO_REG_FPR 0x0040
852 #define KVM_MMIO_REG_QPR 0x0080
853 #define KVM_MMIO_REG_FQPR 0x00c0
854 #define KVM_MMIO_REG_VSX 0x0100
855 #define KVM_MMIO_REG_VMX 0x0180
856 #define KVM_MMIO_REG_NESTED_GPR 0xffc0
859 #define __KVM_HAVE_ARCH_WQP
860 #define __KVM_HAVE_CREATE_DEVICE
862 static inline void kvm_arch_hardware_disable(void) {}
863 static inline void kvm_arch_hardware_unsetup(void) {}
864 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
865 static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
866 static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
867 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
868 static inline void kvm_arch_exit(void) {}
869 static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
870 static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
872 #endif /* __POWERPC_KVM_HOST_H__ */