forked from Minki/linux
c35635efdc
At present, the KVM_GET_DIRTY_LOG ioctl doesn't report modifications done by the host to the virtual processor areas (VPAs) and dispatch trace logs (DTLs) registered by the guest. This is because those modifications are done either in real mode or in the host kernel context, and in neither case does the access go through the guest's HPT, and thus no change (C) bit gets set in the guest's HPT. However, the changes done by the host do need to be tracked so that the modified pages get transferred when doing live migration. In order to track these modifications, this adds a dirty flag to the struct representing the VPA/DTL areas, and arranges to set the flag when the VPA/DTL gets modified by the host. Then, when we are collecting the dirty log, we also check the dirty flags for the VPA and DTL for each vcpu and set the relevant bit in the dirty log if necessary. Doing this also means we now need to keep track of the guest physical address of the VPA/DTL areas. So as not to lose track of modifications to a VPA/DTL area when it gets unregistered, or when a new area gets registered in its place, we need to transfer the dirty state to the rmap chain. This adds code to kvmppc_unpin_guest_page() to do that if the area was dirty. To simplify that code, we now require that all VPA, DTL and SLB shadow buffer areas fit within a single host page. Guests already comply with this requirement because pHyp requires that these areas not cross a 4k boundary. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
469 lines
13 KiB
C
469 lines
13 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright SUSE Linux Products GmbH 2009
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*
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* Authors: Alexander Graf <agraf@suse.de>
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*/
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#ifndef __ASM_KVM_BOOK3S_H__
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#define __ASM_KVM_BOOK3S_H__
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#include <linux/types.h>
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#include <linux/kvm_host.h>
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#include <asm/kvm_book3s_asm.h>
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struct kvmppc_bat {
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u64 raw;
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u32 bepi;
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u32 bepi_mask;
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u32 brpn;
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u8 wimg;
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u8 pp;
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bool vs : 1;
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bool vp : 1;
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};
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struct kvmppc_sid_map {
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u64 guest_vsid;
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u64 guest_esid;
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u64 host_vsid;
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bool valid : 1;
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};
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#define SID_MAP_BITS 9
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#define SID_MAP_NUM (1 << SID_MAP_BITS)
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#define SID_MAP_MASK (SID_MAP_NUM - 1)
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#ifdef CONFIG_PPC_BOOK3S_64
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#define SID_CONTEXTS 1
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#else
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#define SID_CONTEXTS 128
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#define VSID_POOL_SIZE (SID_CONTEXTS * 16)
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#endif
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struct hpte_cache {
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struct hlist_node list_pte;
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struct hlist_node list_pte_long;
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struct hlist_node list_vpte;
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struct hlist_node list_vpte_long;
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struct rcu_head rcu_head;
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u64 host_vpn;
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u64 pfn;
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ulong slot;
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struct kvmppc_pte pte;
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};
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struct kvmppc_vcpu_book3s {
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struct kvm_vcpu vcpu;
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struct kvmppc_book3s_shadow_vcpu *shadow_vcpu;
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struct kvmppc_sid_map sid_map[SID_MAP_NUM];
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struct {
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u64 esid;
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u64 vsid;
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} slb_shadow[64];
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u8 slb_shadow_max;
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struct kvmppc_bat ibat[8];
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struct kvmppc_bat dbat[8];
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u64 hid[6];
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u64 gqr[8];
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u64 sdr1;
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u64 hior;
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u64 msr_mask;
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u64 purr_offset;
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u64 spurr_offset;
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#ifdef CONFIG_PPC_BOOK3S_32
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u32 vsid_pool[VSID_POOL_SIZE];
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u32 vsid_next;
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#else
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u64 proto_vsid_first;
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u64 proto_vsid_max;
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u64 proto_vsid_next;
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#endif
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int context_id[SID_CONTEXTS];
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bool hior_explicit; /* HIOR is set by ioctl, not PVR */
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struct hlist_head hpte_hash_pte[HPTEG_HASH_NUM_PTE];
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struct hlist_head hpte_hash_pte_long[HPTEG_HASH_NUM_PTE_LONG];
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struct hlist_head hpte_hash_vpte[HPTEG_HASH_NUM_VPTE];
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struct hlist_head hpte_hash_vpte_long[HPTEG_HASH_NUM_VPTE_LONG];
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int hpte_cache_count;
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spinlock_t mmu_lock;
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};
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#define CONTEXT_HOST 0
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#define CONTEXT_GUEST 1
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#define CONTEXT_GUEST_END 2
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#define VSID_REAL 0x1fffffffffc00000ULL
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#define VSID_BAT 0x1fffffffffb00000ULL
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#define VSID_REAL_DR 0x2000000000000000ULL
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#define VSID_REAL_IR 0x4000000000000000ULL
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#define VSID_PR 0x8000000000000000ULL
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extern void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong ea, ulong ea_mask);
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extern void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 vp, u64 vp_mask);
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extern void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end);
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extern void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 new_msr);
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extern void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr);
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extern void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu);
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extern void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu);
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extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu);
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extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte);
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extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
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extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
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extern int kvmppc_book3s_hv_page_fault(struct kvm_run *run,
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struct kvm_vcpu *vcpu, unsigned long addr,
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unsigned long status);
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extern long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr,
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unsigned long slb_v, unsigned long valid);
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extern void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
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extern struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu);
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extern void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu);
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extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu);
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extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
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extern int kvmppc_mmu_hpte_sysinit(void);
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extern void kvmppc_mmu_hpte_sysexit(void);
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extern int kvmppc_mmu_hv_init(void);
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extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
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extern int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
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extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec);
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extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags);
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extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat,
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bool upper, u32 val);
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extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr);
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extern int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu);
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extern pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
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extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev,
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unsigned long *rmap, long pte_index, int realmode);
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extern void kvmppc_invalidate_hpte(struct kvm *kvm, unsigned long *hptep,
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unsigned long pte_index);
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void kvmppc_clear_ref_hpte(struct kvm *kvm, unsigned long *hptep,
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unsigned long pte_index);
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extern void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long addr,
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unsigned long *nb_ret);
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extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr,
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unsigned long gpa, bool dirty);
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extern long kvmppc_virtmode_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
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long pte_index, unsigned long pteh, unsigned long ptel);
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extern long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
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long pte_index, unsigned long pteh, unsigned long ptel,
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pgd_t *pgdir, bool realmode, unsigned long *idx_ret);
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extern long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags,
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unsigned long pte_index, unsigned long avpn,
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unsigned long *hpret);
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extern long kvmppc_hv_get_dirty_log(struct kvm *kvm,
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struct kvm_memory_slot *memslot, unsigned long *map);
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extern void kvmppc_entry_trampoline(void);
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extern void kvmppc_hv_entry_trampoline(void);
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extern void kvmppc_load_up_fpu(void);
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extern void kvmppc_load_up_altivec(void);
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extern void kvmppc_load_up_vsx(void);
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extern u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst);
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extern ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst);
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extern int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd);
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static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
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{
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return container_of(vcpu, struct kvmppc_vcpu_book3s, vcpu);
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}
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extern void kvm_return_point(void);
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/* Also add subarch specific defines */
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#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
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#include <asm/kvm_book3s_32.h>
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#endif
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#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
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#include <asm/kvm_book3s_64.h>
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#endif
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#ifdef CONFIG_KVM_BOOK3S_PR
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static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
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{
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return to_book3s(vcpu)->hior;
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}
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static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
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unsigned long pending_now, unsigned long old_pending)
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{
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if (pending_now)
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vcpu->arch.shared->int_pending = 1;
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else if (old_pending)
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vcpu->arch.shared->int_pending = 0;
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}
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static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
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{
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if ( num < 14 ) {
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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svcpu->gpr[num] = val;
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svcpu_put(svcpu);
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to_book3s(vcpu)->shadow_vcpu->gpr[num] = val;
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} else
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vcpu->arch.gpr[num] = val;
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}
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static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
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{
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if ( num < 14 ) {
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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ulong r = svcpu->gpr[num];
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svcpu_put(svcpu);
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return r;
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} else
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return vcpu->arch.gpr[num];
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}
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static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
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{
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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svcpu->cr = val;
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svcpu_put(svcpu);
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to_book3s(vcpu)->shadow_vcpu->cr = val;
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}
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static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
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{
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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u32 r;
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r = svcpu->cr;
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svcpu_put(svcpu);
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return r;
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}
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static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
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{
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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svcpu->xer = val;
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to_book3s(vcpu)->shadow_vcpu->xer = val;
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svcpu_put(svcpu);
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}
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static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
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{
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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u32 r;
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r = svcpu->xer;
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svcpu_put(svcpu);
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return r;
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}
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static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
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{
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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svcpu->ctr = val;
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svcpu_put(svcpu);
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}
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static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
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{
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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ulong r;
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r = svcpu->ctr;
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svcpu_put(svcpu);
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return r;
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}
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static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
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{
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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svcpu->lr = val;
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svcpu_put(svcpu);
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}
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static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
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{
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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ulong r;
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r = svcpu->lr;
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svcpu_put(svcpu);
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return r;
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}
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static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
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{
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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svcpu->pc = val;
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svcpu_put(svcpu);
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}
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static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
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{
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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ulong r;
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r = svcpu->pc;
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svcpu_put(svcpu);
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return r;
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}
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static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
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{
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ulong pc = kvmppc_get_pc(vcpu);
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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u32 r;
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/* Load the instruction manually if it failed to do so in the
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* exit path */
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if (svcpu->last_inst == KVM_INST_FETCH_FAILED)
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kvmppc_ld(vcpu, &pc, sizeof(u32), &svcpu->last_inst, false);
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r = svcpu->last_inst;
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svcpu_put(svcpu);
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return r;
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}
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static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
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{
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struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
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ulong r;
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r = svcpu->fault_dar;
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svcpu_put(svcpu);
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return r;
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}
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static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
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{
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ulong crit_raw = vcpu->arch.shared->critical;
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ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
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bool crit;
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/* Truncate crit indicators in 32 bit mode */
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if (!(vcpu->arch.shared->msr & MSR_SF)) {
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crit_raw &= 0xffffffff;
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crit_r1 &= 0xffffffff;
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}
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/* Critical section when crit == r1 */
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crit = (crit_raw == crit_r1);
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/* ... and we're in supervisor mode */
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crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
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return crit;
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}
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#else /* CONFIG_KVM_BOOK3S_PR */
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static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
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{
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return 0;
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}
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static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
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unsigned long pending_now, unsigned long old_pending)
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{
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}
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static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
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{
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vcpu->arch.gpr[num] = val;
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}
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static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
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{
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return vcpu->arch.gpr[num];
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}
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static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
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{
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vcpu->arch.cr = val;
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}
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static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.cr;
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}
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static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
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{
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vcpu->arch.xer = val;
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}
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static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.xer;
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}
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static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
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{
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vcpu->arch.ctr = val;
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}
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static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.ctr;
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}
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static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
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{
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vcpu->arch.lr = val;
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}
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static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.lr;
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}
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static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
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|
{
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vcpu->arch.pc = val;
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|
}
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|
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static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
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|
{
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|
return vcpu->arch.pc;
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|
}
|
|
|
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static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
|
|
{
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|
ulong pc = kvmppc_get_pc(vcpu);
|
|
|
|
/* Load the instruction manually if it failed to do so in the
|
|
* exit path */
|
|
if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
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|
kvmppc_ld(vcpu, &pc, sizeof(u32), &vcpu->arch.last_inst, false);
|
|
|
|
return vcpu->arch.last_inst;
|
|
}
|
|
|
|
static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
|
|
{
|
|
return vcpu->arch.fault_dar;
|
|
}
|
|
|
|
static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
|
|
{
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
/* Magic register values loaded into r3 and r4 before the 'sc' assembly
|
|
* instruction for the OSI hypercalls */
|
|
#define OSI_SC_MAGIC_R3 0x113724FA
|
|
#define OSI_SC_MAGIC_R4 0x77810F9B
|
|
|
|
#define INS_DCBZ 0x7c0007ec
|
|
/* TO = 31 for unconditional trap */
|
|
#define INS_TW 0x7fe00008
|
|
|
|
/* LPIDs we support with this build -- runtime limit may be lower */
|
|
#define KVMPPC_NR_LPIDS (LPID_RSVD + 1)
|
|
|
|
#endif /* __ASM_KVM_BOOK3S_H__ */
|