diff options
| author | Alexander Graf <agraf@suse.de> | 2010-07-29 17:04:19 +0400 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 12:50:58 +0400 |
| commit | 2d27fc5eac0205588cb59ae138062e5e96695276 (patch) | |
| tree | e621ed3ade57faca4650d6bd46945c578362b2bb /arch/powerpc/kvm | |
| parent | 49451389ecc2b4336c305678c210b25fadd18994 (diff) | |
| download | linux-2d27fc5eac0205588cb59ae138062e5e96695276.tar.xz | |
KVM: PPC: Add book3s_32 tlbie flush acceleration
On Book3s_32 the tlbie instruction flushed effective addresses by the mask
0x0ffff000. This is pretty hard to reflect with a hash that hashes ~0xfff, so
to speed up that target we should also keep a special hash around for it.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/powerpc/kvm')
| -rw-r--r-- | arch/powerpc/kvm/book3s_mmu_hpte.c | 40 |
1 files changed, 35 insertions, 5 deletions
diff --git a/arch/powerpc/kvm/book3s_mmu_hpte.c b/arch/powerpc/kvm/book3s_mmu_hpte.c index b64389362446..02c64ab99c97 100644 --- a/arch/powerpc/kvm/book3s_mmu_hpte.c +++ b/arch/powerpc/kvm/book3s_mmu_hpte.c @@ -45,6 +45,12 @@ static inline u64 kvmppc_mmu_hash_pte(u64 eaddr) return hash_64(eaddr >> PTE_SIZE, HPTEG_HASH_BITS_PTE); } +static inline u64 kvmppc_mmu_hash_pte_long(u64 eaddr) +{ + return hash_64((eaddr & 0x0ffff000) >> PTE_SIZE, + HPTEG_HASH_BITS_PTE_LONG); +} + static inline u64 kvmppc_mmu_hash_vpte(u64 vpage) { return hash_64(vpage & 0xfffffffffULL, HPTEG_HASH_BITS_VPTE); @@ -66,6 +72,11 @@ void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte) index = kvmppc_mmu_hash_pte(pte->pte.eaddr); hlist_add_head_rcu(&pte->list_pte, &vcpu->arch.hpte_hash_pte[index]); + /* Add to ePTE_long list */ + index = kvmppc_mmu_hash_pte_long(pte->pte.eaddr); + hlist_add_head_rcu(&pte->list_pte_long, + &vcpu->arch.hpte_hash_pte_long[index]); + /* Add to vPTE list */ index = kvmppc_mmu_hash_vpte(pte->pte.vpage); hlist_add_head_rcu(&pte->list_vpte, &vcpu->arch.hpte_hash_vpte[index]); @@ -99,6 +110,7 @@ static void invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte) spin_lock(&vcpu->arch.mmu_lock); hlist_del_init_rcu(&pte->list_pte); + hlist_del_init_rcu(&pte->list_pte_long); hlist_del_init_rcu(&pte->list_vpte); hlist_del_init_rcu(&pte->list_vpte_long); @@ -150,10 +162,28 @@ static void kvmppc_mmu_pte_flush_page(struct kvm_vcpu *vcpu, ulong guest_ea) rcu_read_unlock(); } -void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong guest_ea, ulong ea_mask) +static void kvmppc_mmu_pte_flush_long(struct kvm_vcpu *vcpu, ulong guest_ea) { - u64 i; + struct hlist_head *list; + struct hlist_node *node; + struct hpte_cache *pte; + + /* Find the list of entries in the map */ + list = &vcpu->arch.hpte_hash_pte_long[ + kvmppc_mmu_hash_pte_long(guest_ea)]; + rcu_read_lock(); + + /* Check the list for matching entries and invalidate */ + hlist_for_each_entry_rcu(pte, node, list, list_pte_long) + if ((pte->pte.eaddr & 0x0ffff000UL) == guest_ea) + invalidate_pte(vcpu, pte); + + rcu_read_unlock(); +} + +void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong guest_ea, ulong ea_mask) +{ dprintk_mmu("KVM: Flushing %d Shadow PTEs: 0x%lx & 0x%lx\n", vcpu->arch.hpte_cache_count, guest_ea, ea_mask); @@ -164,9 +194,7 @@ void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong guest_ea, ulong ea_mask) kvmppc_mmu_pte_flush_page(vcpu, guest_ea); break; case 0x0ffff000: - /* 32-bit flush w/o segment, go through all possible segments */ - for (i = 0; i < 0x100000000ULL; i += 0x10000000ULL) - kvmppc_mmu_pte_flush(vcpu, guest_ea | i, ~0xfffUL); + kvmppc_mmu_pte_flush_long(vcpu, guest_ea); break; case 0: /* Doing a complete flush -> start from scratch */ @@ -292,6 +320,8 @@ int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu) /* init hpte lookup hashes */ kvmppc_mmu_hpte_init_hash(vcpu->arch.hpte_hash_pte, ARRAY_SIZE(vcpu->arch.hpte_hash_pte)); + kvmppc_mmu_hpte_init_hash(vcpu->arch.hpte_hash_pte_long, + ARRAY_SIZE(vcpu->arch.hpte_hash_pte_long)); kvmppc_mmu_hpte_init_hash(vcpu->arch.hpte_hash_vpte, ARRAY_SIZE(vcpu->arch.hpte_hash_vpte)); kvmppc_mmu_hpte_init_hash(vcpu->arch.hpte_hash_vpte_long, |