2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
15 * Copyright IBM Corp. 2007
17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
20 #ifndef __POWERPC_KVM_HOST_H__
21 #define __POWERPC_KVM_HOST_H__
23 #include <linux/mutex.h>
24 #include <linux/hrtimer.h>
25 #include <linux/interrupt.h>
26 #include <linux/types.h>
27 #include <linux/kvm_types.h>
28 #include <linux/threads.h>
29 #include <linux/spinlock.h>
30 #include <linux/kvm_para.h>
31 #include <linux/list.h>
32 #include <linux/atomic.h>
33 #include <asm/kvm_asm.h>
34 #include <asm/processor.h>
36 #include <asm/cacheflush.h>
37 #include <asm/hvcall.h>
40 #define KVM_MAX_VCPUS NR_CPUS
41 #define KVM_MAX_VCORES NR_CPUS
42 #define KVM_USER_MEM_SLOTS 512
44 #include <asm/cputhreads.h>
46 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
47 #include <asm/kvm_book3s_asm.h> /* for MAX_SMT_THREADS */
48 #define KVM_MAX_VCPU_ID (MAX_SMT_THREADS * KVM_MAX_VCORES)
49 #define KVM_MAX_NESTED_GUESTS KVMPPC_NR_LPIDS
52 #define KVM_MAX_VCPU_ID KVM_MAX_VCPUS
53 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
55 #define __KVM_HAVE_ARCH_INTC_INITIALIZED
57 #define KVM_HALT_POLL_NS_DEFAULT 10000 /* 10 us */
59 /* These values are internal and can be increased later */
60 #define KVM_NR_IRQCHIPS 1
61 #define KVM_IRQCHIP_NUM_PINS 256
63 /* PPC-specific vcpu->requests bit members */
64 #define KVM_REQ_WATCHDOG KVM_ARCH_REQ(0)
65 #define KVM_REQ_EPR_EXIT KVM_ARCH_REQ(1)
67 #include <linux/mmu_notifier.h>
69 #define KVM_ARCH_WANT_MMU_NOTIFIER
71 extern int kvm_unmap_hva_range(struct kvm *kvm,
72 unsigned long start, unsigned long end);
73 extern int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
74 extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
75 extern int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
77 #define HPTEG_CACHE_NUM (1 << 15)
78 #define HPTEG_HASH_BITS_PTE 13
79 #define HPTEG_HASH_BITS_PTE_LONG 12
80 #define HPTEG_HASH_BITS_VPTE 13
81 #define HPTEG_HASH_BITS_VPTE_LONG 5
82 #define HPTEG_HASH_BITS_VPTE_64K 11
83 #define HPTEG_HASH_NUM_PTE (1 << HPTEG_HASH_BITS_PTE)
84 #define HPTEG_HASH_NUM_PTE_LONG (1 << HPTEG_HASH_BITS_PTE_LONG)
85 #define HPTEG_HASH_NUM_VPTE (1 << HPTEG_HASH_BITS_VPTE)
86 #define HPTEG_HASH_NUM_VPTE_LONG (1 << HPTEG_HASH_BITS_VPTE_LONG)
87 #define HPTEG_HASH_NUM_VPTE_64K (1 << HPTEG_HASH_BITS_VPTE_64K)
89 /* Physical Address Mask - allowed range of real mode RAM access */
90 #define KVM_PAM 0x0fffffffffffffffULL
96 struct kvmppc_vcpu_book3s;
97 struct kvmppc_book3s_shadow_vcpu;
98 struct kvm_nested_guest;
101 ulong remote_tlb_flush;
106 struct kvm_vcpu_stat {
111 /* Account for special types of light exits: */
112 u64 itlb_real_miss_exits;
113 u64 itlb_virt_miss_exits;
114 u64 dtlb_real_miss_exits;
115 u64 dtlb_virt_miss_exits;
119 u64 emulated_inst_exits;
122 u64 halt_poll_success_ns;
123 u64 halt_poll_fail_ns;
125 u64 halt_successful_poll;
126 u64 halt_attempted_poll;
127 u64 halt_successful_wait;
128 u64 halt_poll_invalid;
134 #ifdef CONFIG_PPC_BOOK3S
148 enum kvm_exit_types {
151 ITLB_REAL_MISS_EXITS,
152 ITLB_VIRT_MISS_EXITS,
153 DTLB_REAL_MISS_EXITS,
154 DTLB_VIRT_MISS_EXITS,
159 EMULATED_MTMSRWE_EXITS,
160 EMULATED_WRTEE_EXITS,
161 EMULATED_MTSPR_EXITS,
162 EMULATED_MFSPR_EXITS,
163 EMULATED_MTMSR_EXITS,
164 EMULATED_MFMSR_EXITS,
165 EMULATED_TLBSX_EXITS,
166 EMULATED_TLBWE_EXITS,
179 __NUMBER_OF_KVM_EXIT_TYPES
182 /* allow access to big endian 32bit upper/lower parts and 64bit var */
183 struct kvmppc_exit_timing {
192 struct kvmppc_pginfo {
197 struct kvmppc_spapr_tce_iommu_table {
199 struct list_head next;
200 struct iommu_table *tbl;
204 struct kvmppc_spapr_tce_table {
205 struct list_head list;
210 u64 offset; /* in pages */
211 u64 size; /* window size in pages */
212 struct list_head iommu_tables;
213 struct page *pages[0];
216 /* XICS components, defined in book3s_xics.c */
219 extern struct kvm_device_ops kvm_xics_ops;
221 /* XIVE components, defined in book3s_xive.c */
223 struct kvmppc_xive_vcpu;
224 extern struct kvm_device_ops kvm_xive_ops;
226 struct kvmppc_passthru_irqmap;
229 * The reverse mapping array has one entry for each HPTE,
230 * which stores the guest's view of the second word of the HPTE
231 * (including the guest physical address of the mapping),
232 * plus forward and backward pointers in a doubly-linked ring
233 * of HPTEs that map the same host page. The pointers in this
234 * ring are 32-bit HPTE indexes, to save space.
236 struct revmap_entry {
237 unsigned long guest_rpte;
238 unsigned int forw, back;
242 * We use the top bit of each memslot->arch.rmap entry as a lock bit,
243 * and bit 32 as a present flag. The bottom 32 bits are the
244 * index in the guest HPT of a HPTE that points to the page.
246 #define KVMPPC_RMAP_LOCK_BIT 63
247 #define KVMPPC_RMAP_RC_SHIFT 32
248 #define KVMPPC_RMAP_REFERENCED (HPTE_R_R << KVMPPC_RMAP_RC_SHIFT)
249 #define KVMPPC_RMAP_PRESENT 0x100000000ul
250 #define KVMPPC_RMAP_INDEX 0xfffffffful
252 struct kvm_arch_memory_slot {
253 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
255 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
258 struct kvm_hpt_info {
259 /* Host virtual (linear mapping) address of guest HPT */
261 /* Array of reverse mapping entries for each guest HPTE */
262 struct revmap_entry *rev;
263 /* Guest HPT size is 2**(order) bytes */
265 /* 1 if HPT allocated with CMA, 0 otherwise */
269 struct kvm_resize_hpt;
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;
290 cpumask_t cpu_in_guest;
297 struct dentry *debugfs_dir;
298 struct dentry *htab_dentry;
299 struct dentry *radix_dentry;
300 struct kvm_resize_hpt *resize_hpt; /* protected by kvm->lock */
301 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
302 #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
303 struct mutex hpt_mutex;
305 #ifdef CONFIG_PPC_BOOK3S_64
306 struct list_head spapr_tce_tables;
307 struct list_head rtas_tokens;
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_xive *xive;
316 struct kvmppc_passthru_irqmap *pimap;
318 struct kvmppc_ops *kvm_ops;
319 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
322 struct kvm_nested_guest *nested_guests[KVM_MAX_NESTED_GUESTS];
323 /* This array can grow quite large, keep it at the end */
324 struct kvmppc_vcore *vcores[KVM_MAX_VCORES];
328 #define VCORE_ENTRY_MAP(vc) ((vc)->entry_exit_map & 0xff)
329 #define VCORE_EXIT_MAP(vc) ((vc)->entry_exit_map >> 8)
330 #define VCORE_IS_EXITING(vc) (VCORE_EXIT_MAP(vc) != 0)
332 /* This bit is used when a vcore exit is triggered from outside the vcore */
333 #define VCORE_EXIT_REQ 0x10000
336 * Values for vcore_state.
337 * Note that these are arranged such that lower values
338 * (< VCORE_SLEEPING) don't require stolen time accounting
339 * on load/unload, and higher values do.
341 #define VCORE_INACTIVE 0
342 #define VCORE_PREEMPT 1
343 #define VCORE_PIGGYBACK 2
344 #define VCORE_SLEEPING 3
345 #define VCORE_RUNNING 4
346 #define VCORE_EXITING 5
347 #define VCORE_POLLING 6
350 * Struct used to manage memory for a virtual processor area
351 * registered by a PAPR guest. There are three types of area
352 * that a guest can register.
355 unsigned long gpa; /* Current guest phys addr */
356 void *pinned_addr; /* Address in kernel linear mapping */
357 void *pinned_end; /* End of region */
358 unsigned long next_gpa; /* Guest phys addr for update */
359 unsigned long len; /* Number of bytes required */
360 u8 update_pending; /* 1 => update pinned_addr from next_gpa */
361 bool dirty; /* true => area has been modified by kernel */
370 bool may_execute : 1;
373 u8 page_size; /* MMU_PAGE_xxx */
379 void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs);
380 u64 (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr);
381 u64 (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr);
382 int (*slbfee)(struct kvm_vcpu *vcpu, gva_t eaddr, ulong *ret_slb);
383 void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr);
384 void (*slbia)(struct kvm_vcpu *vcpu);
386 void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value);
387 u32 (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum);
388 int (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr,
389 struct kvmppc_pte *pte, bool data, bool iswrite);
390 void (*reset_msr)(struct kvm_vcpu *vcpu);
391 void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large);
392 int (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid);
393 u64 (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data);
394 bool (*is_dcbz32)(struct kvm_vcpu *vcpu);
406 bool large : 1; /* PTEs are 16MB */
407 bool tb : 1; /* 1TB segment */
409 u8 base_page_size; /* MMU_PAGE_xxx */
412 /* Struct used to accumulate timing information in HV real mode code */
413 struct kvmhv_tb_accumulator {
414 u64 seqcount; /* used to synchronize access, also count * 2 */
415 u64 tb_total; /* total time in timebase ticks */
416 u64 tb_min; /* min time */
417 u64 tb_max; /* max time */
420 #ifdef CONFIG_PPC_BOOK3S_64
421 struct kvmppc_irq_map {
424 struct irq_desc *desc;
427 #define KVMPPC_PIRQ_MAPPED 1024
428 struct kvmppc_passthru_irqmap {
430 struct kvmppc_irq_map mapped[KVMPPC_PIRQ_MAPPED];
434 # ifdef CONFIG_PPC_FSL_BOOK3E
435 #define KVMPPC_BOOKE_IAC_NUM 2
436 #define KVMPPC_BOOKE_DAC_NUM 2
438 #define KVMPPC_BOOKE_IAC_NUM 4
439 #define KVMPPC_BOOKE_DAC_NUM 2
441 #define KVMPPC_BOOKE_MAX_IAC 4
442 #define KVMPPC_BOOKE_MAX_DAC 2
444 /* KVMPPC_EPR_USER takes precedence over KVMPPC_EPR_KERNEL */
445 #define KVMPPC_EPR_NONE 0 /* EPR not supported */
446 #define KVMPPC_EPR_USER 1 /* exit to userspace to fill EPR */
447 #define KVMPPC_EPR_KERNEL 2 /* in-kernel irqchip */
449 #define KVMPPC_IRQ_DEFAULT 0
450 #define KVMPPC_IRQ_MPIC 1
451 #define KVMPPC_IRQ_XICS 2 /* Includes a XIVE option */
453 #define MMIO_HPTE_CACHE_SIZE 4
455 struct mmio_hpte_cache_entry {
456 unsigned long hpte_v;
457 unsigned long hpte_r;
459 unsigned long pte_index;
463 unsigned int slb_base_pshift;
466 struct mmio_hpte_cache {
467 struct mmio_hpte_cache_entry entry[MMIO_HPTE_CACHE_SIZE];
471 #define KVMPPC_VSX_COPY_NONE 0
472 #define KVMPPC_VSX_COPY_WORD 1
473 #define KVMPPC_VSX_COPY_DWORD 2
474 #define KVMPPC_VSX_COPY_DWORD_LOAD_DUMP 3
475 #define KVMPPC_VSX_COPY_WORD_LOAD_DUMP 4
477 #define KVMPPC_VMX_COPY_BYTE 8
478 #define KVMPPC_VMX_COPY_HWORD 9
479 #define KVMPPC_VMX_COPY_WORD 10
480 #define KVMPPC_VMX_COPY_DWORD 11
484 /* W0 and W1 of a XIVE thread management context */
499 struct kvm_vcpu_arch {
502 #ifdef CONFIG_PPC_BOOK3S
503 struct kvmppc_slb slb[64];
504 int slb_max; /* 1 + index of last valid entry in slb[] */
505 int slb_nr; /* total number of entries in SLB */
506 struct kvmppc_mmu mmu;
507 struct kvmppc_vcpu_book3s *book3s;
509 #ifdef CONFIG_PPC_BOOK3S_32
510 struct kvmppc_book3s_shadow_vcpu *shadow_vcpu;
515 struct thread_fp_state fp;
523 #ifdef CONFIG_ALTIVEC
524 struct thread_vr_state vr;
527 #ifdef CONFIG_KVM_BOOKE_HV
537 #if defined(CONFIG_BOOKE)
538 #if defined(CONFIG_KVM_BOOKE_HV) || defined(CONFIG_64BIT)
543 #ifdef CONFIG_PPC_BOOK3S
544 /* For Gekko paired singles */
548 #ifdef CONFIG_PPC_BOOK3S
552 #ifdef CONFIG_PPC_BOOK3S
554 ulong guest_owned_ext;
586 u32 vrsave; /* also USPRG0 */
588 /* shadow_msr is unused for BookE HV */
601 /* Time base value when we entered the guest */
606 ulong tsr; /* we need to perform set/clr_bits() which requires ulong */
626 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
643 struct thread_fp_state fp_tm;
645 struct thread_vr_state vr_tm;
646 u32 vrsave_tm; /* also USPRG0 */
649 #ifdef CONFIG_KVM_EXIT_TIMING
650 struct mutex exit_timing_lock;
651 struct kvmppc_exit_timing timing_exit;
652 struct kvmppc_exit_timing timing_last_enter;
654 u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES];
655 u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES];
656 u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES];
657 u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES];
658 u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES];
659 u64 timing_last_exit;
660 struct dentry *debugfs_exit_timing;
663 #ifdef CONFIG_PPC_BOOK3S
666 unsigned long intr_msr;
667 ulong fault_gpa; /* guest real address of page fault (POWER9) */
676 struct timer_list wdt_timer;
685 /* guest debug registers*/
686 struct debug_reg dbg_reg;
688 gpa_t paddr_accessed;
689 gva_t vaddr_accessed;
692 u16 io_gpr; /* GPR used as IO source/target */
693 u8 mmio_host_swabbed;
695 /* conversion between single and double precision */
698 * Number of simulations for vsx.
699 * If we use 2*8bytes to simulate 1*16bytes,
700 * then the number should be 2 and
701 * mmio_copy_type=KVMPPC_VSX_COPY_DWORD.
702 * If we use 4*4bytes to simulate 1*16bytes,
703 * the number should be 4 and
704 * mmio_vsx_copy_type=KVMPPC_VSX_COPY_WORD.
706 u8 mmio_vsx_copy_nums;
708 u8 mmio_vmx_copy_nums;
718 u8 epr_flags; /* KVMPPC_EPR_xxx */
720 u8 external_oneshot; /* clear external irq after delivery */
722 u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */
724 struct hrtimer dec_timer;
727 unsigned long pending_exceptions;
731 u8 irq_pending; /* Used by XIVE to signal pending guest irqs */
734 struct swait_queue_head *wqp;
735 struct kvmppc_vcore *vcore;
743 wait_queue_head_t cpu_run;
744 struct machine_check_event mce_evt; /* Valid if trap == 0x200 */
746 struct kvm_vcpu_arch_shared *shared;
747 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
748 bool shared_big_endian;
750 unsigned long magic_page_pa; /* phys addr to map the magic page to */
751 unsigned long magic_page_ea; /* effect. addr to map the magic page to */
752 bool disable_kernel_nx;
754 int irq_type; /* one of KVM_IRQ_* */
756 struct openpic *mpic; /* KVM_IRQ_MPIC */
757 #ifdef CONFIG_KVM_XICS
758 struct kvmppc_icp *icp; /* XICS presentation controller */
759 struct kvmppc_xive_vcpu *xive_vcpu; /* XIVE virtual CPU data */
760 __be32 xive_cam_word; /* Cooked W2 in proper endian with valid bit */
761 u8 xive_pushed; /* Is the VP pushed on the physical CPU ? */
762 u8 xive_esc_on; /* Is the escalation irq enabled ? */
763 union xive_tma_w01 xive_saved_state; /* W0..1 of XIVE thread state */
764 u64 xive_esc_raddr; /* Escalation interrupt ESB real addr */
765 u64 xive_esc_vaddr; /* Escalation interrupt ESB virt addr */
768 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
769 struct kvm_vcpu_arch_shared shregs;
771 struct mmio_hpte_cache mmio_cache;
772 unsigned long pgfault_addr;
774 unsigned long pgfault_hpte[2];
775 struct mmio_hpte_cache_entry *pgfault_cache;
777 struct task_struct *run_task;
778 struct kvm_run *kvm_run;
780 spinlock_t vpa_update_lock;
781 struct kvmppc_vpa vpa;
782 struct kvmppc_vpa dtl;
783 struct dtl_entry *dtl_ptr;
784 unsigned long dtl_index;
786 struct kvmppc_vpa slb_shadow;
788 spinlock_t tbacct_lock;
796 /* For support of nested guests */
797 struct kvm_nested_guest *nested;
802 #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
803 struct kvmhv_tb_accumulator *cur_activity; /* What we're timing */
804 u64 cur_tb_start; /* when it started */
805 struct kvmhv_tb_accumulator rm_entry; /* real-mode entry code */
806 struct kvmhv_tb_accumulator rm_intr; /* real-mode intr handling */
807 struct kvmhv_tb_accumulator rm_exit; /* real-mode exit code */
808 struct kvmhv_tb_accumulator guest_time; /* guest execution */
809 struct kvmhv_tb_accumulator cede_time; /* time napping inside guest */
811 struct dentry *debugfs_dir;
812 struct dentry *debugfs_timings;
813 #endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
816 #define VCPU_FPR(vcpu, i) (vcpu)->arch.fp.fpr[i][TS_FPROFFSET]
817 #define VCPU_VSX_FPR(vcpu, i, j) ((vcpu)->arch.fp.fpr[i][j])
818 #define VCPU_VSX_VR(vcpu, i) ((vcpu)->arch.vr.vr[i])
820 /* Values for vcpu->arch.state */
821 #define KVMPPC_VCPU_NOTREADY 0
822 #define KVMPPC_VCPU_RUNNABLE 1
823 #define KVMPPC_VCPU_BUSY_IN_HOST 2
825 /* Values for vcpu->arch.io_gpr */
826 #define KVM_MMIO_REG_MASK 0x003f
827 #define KVM_MMIO_REG_EXT_MASK 0xffc0
828 #define KVM_MMIO_REG_GPR 0x0000
829 #define KVM_MMIO_REG_FPR 0x0040
830 #define KVM_MMIO_REG_QPR 0x0080
831 #define KVM_MMIO_REG_FQPR 0x00c0
832 #define KVM_MMIO_REG_VSX 0x0100
833 #define KVM_MMIO_REG_VMX 0x0180
834 #define KVM_MMIO_REG_NESTED_GPR 0xffc0
837 #define __KVM_HAVE_ARCH_WQP
838 #define __KVM_HAVE_CREATE_DEVICE
840 static inline void kvm_arch_hardware_disable(void) {}
841 static inline void kvm_arch_hardware_unsetup(void) {}
842 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
843 static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
844 static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
845 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
846 static inline void kvm_arch_exit(void) {}
847 static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
848 static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
849 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
851 #endif /* __POWERPC_KVM_HOST_H__ */