diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_32_mmu_host.c')
-rw-r--r-- | arch/powerpc/kvm/book3s_32_mmu_host.c | 189 |
1 files changed, 45 insertions, 144 deletions
diff --git a/arch/powerpc/kvm/book3s_32_mmu_host.c b/arch/powerpc/kvm/book3s_32_mmu_host.c index 0bb66005338f..9fecbfbce773 100644 --- a/arch/powerpc/kvm/book3s_32_mmu_host.c +++ b/arch/powerpc/kvm/book3s_32_mmu_host.c @@ -57,125 +57,19 @@ static ulong htab; static u32 htabmask; -static void invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte) +void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte) { volatile u32 *pteg; - dprintk_mmu("KVM: Flushing SPTE: 0x%llx (0x%llx) -> 0x%llx\n", - pte->pte.eaddr, pte->pte.vpage, pte->host_va); - + /* Remove from host HTAB */ pteg = (u32*)pte->slot; - pteg[0] = 0; + + /* And make sure it's gone from the TLB too */ asm volatile ("sync"); asm volatile ("tlbie %0" : : "r" (pte->pte.eaddr) : "memory"); asm volatile ("sync"); asm volatile ("tlbsync"); - - pte->host_va = 0; - - if (pte->pte.may_write) - kvm_release_pfn_dirty(pte->pfn); - else - kvm_release_pfn_clean(pte->pfn); -} - -void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong guest_ea, ulong ea_mask) -{ - int i; - - dprintk_mmu("KVM: Flushing %d Shadow PTEs: 0x%x & 0x%x\n", - vcpu->arch.hpte_cache_offset, guest_ea, ea_mask); - BUG_ON(vcpu->arch.hpte_cache_offset > HPTEG_CACHE_NUM); - - guest_ea &= ea_mask; - for (i = 0; i < vcpu->arch.hpte_cache_offset; i++) { - struct hpte_cache *pte; - - pte = &vcpu->arch.hpte_cache[i]; - if (!pte->host_va) - continue; - - if ((pte->pte.eaddr & ea_mask) == guest_ea) { - invalidate_pte(vcpu, pte); - } - } - - /* Doing a complete flush -> start from scratch */ - if (!ea_mask) - vcpu->arch.hpte_cache_offset = 0; -} - -void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 guest_vp, u64 vp_mask) -{ - int i; - - dprintk_mmu("KVM: Flushing %d Shadow vPTEs: 0x%llx & 0x%llx\n", - vcpu->arch.hpte_cache_offset, guest_vp, vp_mask); - BUG_ON(vcpu->arch.hpte_cache_offset > HPTEG_CACHE_NUM); - - guest_vp &= vp_mask; - for (i = 0; i < vcpu->arch.hpte_cache_offset; i++) { - struct hpte_cache *pte; - - pte = &vcpu->arch.hpte_cache[i]; - if (!pte->host_va) - continue; - - if ((pte->pte.vpage & vp_mask) == guest_vp) { - invalidate_pte(vcpu, pte); - } - } -} - -void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end) -{ - int i; - - dprintk_mmu("KVM: Flushing %d Shadow pPTEs: 0x%llx & 0x%llx\n", - vcpu->arch.hpte_cache_offset, pa_start, pa_end); - BUG_ON(vcpu->arch.hpte_cache_offset > HPTEG_CACHE_NUM); - - for (i = 0; i < vcpu->arch.hpte_cache_offset; i++) { - struct hpte_cache *pte; - - pte = &vcpu->arch.hpte_cache[i]; - if (!pte->host_va) - continue; - - if ((pte->pte.raddr >= pa_start) && - (pte->pte.raddr < pa_end)) { - invalidate_pte(vcpu, pte); - } - } -} - -struct kvmppc_pte *kvmppc_mmu_find_pte(struct kvm_vcpu *vcpu, u64 ea, bool data) -{ - int i; - u64 guest_vp; - - guest_vp = vcpu->arch.mmu.ea_to_vp(vcpu, ea, false); - for (i=0; i<vcpu->arch.hpte_cache_offset; i++) { - struct hpte_cache *pte; - - pte = &vcpu->arch.hpte_cache[i]; - if (!pte->host_va) - continue; - - if (pte->pte.vpage == guest_vp) - return &pte->pte; - } - - return NULL; -} - -static int kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu) -{ - if (vcpu->arch.hpte_cache_offset == HPTEG_CACHE_NUM) - kvmppc_mmu_pte_flush(vcpu, 0, 0); - - return vcpu->arch.hpte_cache_offset++; } /* We keep 512 gvsid->hvsid entries, mapping the guest ones to the array using @@ -198,7 +92,7 @@ static struct kvmppc_sid_map *find_sid_vsid(struct kvm_vcpu *vcpu, u64 gvsid) struct kvmppc_sid_map *map; u16 sid_map_mask; - if (vcpu->arch.msr & MSR_PR) + if (vcpu->arch.shared->msr & MSR_PR) gvsid |= VSID_PR; sid_map_mask = kvmppc_sid_hash(vcpu, gvsid); @@ -256,12 +150,11 @@ int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *orig_pte) register int rr = 0; bool primary = false; bool evict = false; - int hpte_id; struct hpte_cache *pte; /* Get host physical address for gpa */ - hpaddr = gfn_to_pfn(vcpu->kvm, orig_pte->raddr >> PAGE_SHIFT); - if (kvm_is_error_hva(hpaddr)) { + hpaddr = kvmppc_gfn_to_pfn(vcpu, orig_pte->raddr >> PAGE_SHIFT); + if (is_error_pfn(hpaddr)) { printk(KERN_INFO "Couldn't get guest page for gfn %lx!\n", orig_pte->eaddr); return -EINVAL; @@ -341,8 +234,7 @@ next_pteg: /* Now tell our Shadow PTE code about the new page */ - hpte_id = kvmppc_mmu_hpte_cache_next(vcpu); - pte = &vcpu->arch.hpte_cache[hpte_id]; + pte = kvmppc_mmu_hpte_cache_next(vcpu); dprintk_mmu("KVM: %c%c Map 0x%llx: [%lx] 0x%llx (0x%llx) -> %lx\n", orig_pte->may_write ? 'w' : '-', @@ -355,6 +247,8 @@ next_pteg: pte->pte = *orig_pte; pte->pfn = hpaddr >> PAGE_SHIFT; + kvmppc_mmu_hpte_cache_map(vcpu, pte); + return 0; } @@ -365,7 +259,7 @@ static struct kvmppc_sid_map *create_sid_map(struct kvm_vcpu *vcpu, u64 gvsid) u16 sid_map_mask; static int backwards_map = 0; - if (vcpu->arch.msr & MSR_PR) + if (vcpu->arch.shared->msr & MSR_PR) gvsid |= VSID_PR; /* We might get collisions that trap in preceding order, so let's @@ -381,18 +275,15 @@ static struct kvmppc_sid_map *create_sid_map(struct kvm_vcpu *vcpu, u64 gvsid) backwards_map = !backwards_map; /* Uh-oh ... out of mappings. Let's flush! */ - if (vcpu_book3s->vsid_next >= vcpu_book3s->vsid_max) { - vcpu_book3s->vsid_next = vcpu_book3s->vsid_first; + if (vcpu_book3s->vsid_next >= VSID_POOL_SIZE) { + vcpu_book3s->vsid_next = 0; memset(vcpu_book3s->sid_map, 0, sizeof(struct kvmppc_sid_map) * SID_MAP_NUM); kvmppc_mmu_pte_flush(vcpu, 0, 0); kvmppc_mmu_flush_segments(vcpu); } - map->host_vsid = vcpu_book3s->vsid_next; - - /* Would have to be 111 to be completely aligned with the rest of - Linux, but that is just way too little space! */ - vcpu_book3s->vsid_next+=1; + map->host_vsid = vcpu_book3s->vsid_pool[vcpu_book3s->vsid_next]; + vcpu_book3s->vsid_next++; map->guest_vsid = gvsid; map->valid = true; @@ -439,45 +330,55 @@ void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu) void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu) { - kvmppc_mmu_pte_flush(vcpu, 0, 0); + int i; + + kvmppc_mmu_hpte_destroy(vcpu); preempt_disable(); - __destroy_context(to_book3s(vcpu)->context_id); + for (i = 0; i < SID_CONTEXTS; i++) + __destroy_context(to_book3s(vcpu)->context_id[i]); preempt_enable(); } /* From mm/mmu_context_hash32.c */ -#define CTX_TO_VSID(ctx) (((ctx) * (897 * 16)) & 0xffffff) +#define CTX_TO_VSID(c, id) ((((c) * (897 * 16)) + (id * 0x111)) & 0xffffff) int kvmppc_mmu_init(struct kvm_vcpu *vcpu) { struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu); int err; ulong sdr1; + int i; + int j; - err = __init_new_context(); - if (err < 0) - return -1; - vcpu3s->context_id = err; - - vcpu3s->vsid_max = CTX_TO_VSID(vcpu3s->context_id + 1) - 1; - vcpu3s->vsid_first = CTX_TO_VSID(vcpu3s->context_id); - -#if 0 /* XXX still doesn't guarantee uniqueness */ - /* We could collide with the Linux vsid space because the vsid - * wraps around at 24 bits. We're safe if we do our own space - * though, so let's always set the highest bit. */ + for (i = 0; i < SID_CONTEXTS; i++) { + err = __init_new_context(); + if (err < 0) + goto init_fail; + vcpu3s->context_id[i] = err; - vcpu3s->vsid_max |= 0x00800000; - vcpu3s->vsid_first |= 0x00800000; -#endif - BUG_ON(vcpu3s->vsid_max < vcpu3s->vsid_first); + /* Remember context id for this combination */ + for (j = 0; j < 16; j++) + vcpu3s->vsid_pool[(i * 16) + j] = CTX_TO_VSID(err, j); + } - vcpu3s->vsid_next = vcpu3s->vsid_first; + vcpu3s->vsid_next = 0; /* Remember where the HTAB is */ asm ( "mfsdr1 %0" : "=r"(sdr1) ); htabmask = ((sdr1 & 0x1FF) << 16) | 0xFFC0; htab = (ulong)__va(sdr1 & 0xffff0000); + kvmppc_mmu_hpte_init(vcpu); + return 0; + +init_fail: + for (j = 0; j < i; j++) { + if (!vcpu3s->context_id[j]) + continue; + + __destroy_context(to_book3s(vcpu)->context_id[j]); + } + + return -1; } |