diff options
Diffstat (limited to 'arch/powerpc/kvm')
| -rw-r--r-- | arch/powerpc/kvm/e500_tlb.c | 69 |
1 files changed, 39 insertions, 30 deletions
diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c index 507376890cf8..1746e677bf37 100644 --- a/arch/powerpc/kvm/e500_tlb.c +++ b/arch/powerpc/kvm/e500_tlb.c @@ -296,17 +296,41 @@ static inline void __write_host_tlbe(struct kvm_book3e_206_tlb_entry *stlbe, local_irq_restore(flags); } -/* esel is index into set, not whole array */ +/* + * Acquire a mas0 with victim hint, as if we just took a TLB miss. + * + * We don't care about the address we're searching for, other than that it's + * in the right set and is not present in the TLB. Using a zero PID and a + * userspace address means we don't have to set and then restore MAS5, or + * calculate a proper MAS6 value. + */ +static u32 get_host_mas0(unsigned long eaddr) +{ + unsigned long flags; + u32 mas0; + + local_irq_save(flags); + mtspr(SPRN_MAS6, 0); + asm volatile("tlbsx 0, %0" : : "b" (eaddr & ~CONFIG_PAGE_OFFSET)); + mas0 = mfspr(SPRN_MAS0); + local_irq_restore(flags); + + return mas0; +} + +/* sesel is for tlb1 only */ static inline void write_host_tlbe(struct kvmppc_vcpu_e500 *vcpu_e500, - int tlbsel, int esel, struct kvm_book3e_206_tlb_entry *stlbe) + int tlbsel, int sesel, struct kvm_book3e_206_tlb_entry *stlbe) { + u32 mas0; + if (tlbsel == 0) { - int way = esel & (vcpu_e500->gtlb_params[0].ways - 1); - __write_host_tlbe(stlbe, MAS0_TLBSEL(0) | MAS0_ESEL(way)); + mas0 = get_host_mas0(stlbe->mas2); + __write_host_tlbe(stlbe, mas0); } else { __write_host_tlbe(stlbe, MAS0_TLBSEL(1) | - MAS0_ESEL(to_htlb1_esel(esel))); + MAS0_ESEL(to_htlb1_esel(sesel))); } trace_kvm_stlb_write(index_of(tlbsel, esel), stlbe->mas1, stlbe->mas2, (u32)stlbe->mas7_3, (u32)(stlbe->mas7_3 >> 32)); @@ -422,12 +446,6 @@ static int gtlb0_set_base(struct kvmppc_vcpu_e500 *vcpu_e500, gva_t addr) vcpu_e500->gtlb_params[0].ways); } -static int htlb0_set_base(gva_t addr) -{ - return tlb0_set_base(addr, host_tlb_params[0].sets, - host_tlb_params[0].ways); -} - static unsigned int get_tlb_esel(struct kvm_vcpu *vcpu, int tlbsel) { struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); @@ -585,10 +603,9 @@ static inline void kvmppc_e500_setup_stlbe( vcpu_e500->vcpu.arch.shared->msr & MSR_PR); } -/* sesel is an index into the entire array, not just the set */ static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500, u64 gvaddr, gfn_t gfn, struct kvm_book3e_206_tlb_entry *gtlbe, - int tlbsel, int sesel, struct kvm_book3e_206_tlb_entry *stlbe, + int tlbsel, struct kvm_book3e_206_tlb_entry *stlbe, struct tlbe_ref *ref) { struct kvm_memory_slot *slot; @@ -721,27 +738,19 @@ static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500, } /* XXX only map the one-one case, for now use TLB0 */ -static int kvmppc_e500_tlb0_map(struct kvmppc_vcpu_e500 *vcpu_e500, - int esel, - struct kvm_book3e_206_tlb_entry *stlbe) +static void kvmppc_e500_tlb0_map(struct kvmppc_vcpu_e500 *vcpu_e500, + int esel, + struct kvm_book3e_206_tlb_entry *stlbe) { struct kvm_book3e_206_tlb_entry *gtlbe; struct tlbe_ref *ref; - int sesel = esel & (host_tlb_params[0].ways - 1); - int sesel_base; - gva_t ea; gtlbe = get_entry(vcpu_e500, 0, esel); ref = &vcpu_e500->gtlb_priv[0][esel].ref; - ea = get_tlb_eaddr(gtlbe); - sesel_base = htlb0_set_base(ea); - kvmppc_e500_shadow_map(vcpu_e500, get_tlb_eaddr(gtlbe), get_tlb_raddr(gtlbe) >> PAGE_SHIFT, - gtlbe, 0, sesel_base + sesel, stlbe, ref); - - return sesel; + gtlbe, 0, stlbe, ref); } /* Caller must ensure that the specified guest TLB entry is safe to insert into @@ -760,8 +769,7 @@ static int kvmppc_e500_tlb1_map(struct kvmppc_vcpu_e500 *vcpu_e500, vcpu_e500->host_tlb1_nv = 0; ref = &vcpu_e500->tlb_refs[1][victim]; - kvmppc_e500_shadow_map(vcpu_e500, gvaddr, gfn, gtlbe, 1, - victim, stlbe, ref); + kvmppc_e500_shadow_map(vcpu_e500, gvaddr, gfn, gtlbe, 1, stlbe, ref); return victim; } @@ -910,7 +918,7 @@ int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb) return EMULATE_DONE; } -/* sesel is index into the set, not the whole array */ +/* sesel is for tlb1 only */ static void write_stlbe(struct kvmppc_vcpu_e500 *vcpu_e500, struct kvm_book3e_206_tlb_entry *gtlbe, struct kvm_book3e_206_tlb_entry *stlbe, @@ -963,7 +971,8 @@ int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu) gtlbe->mas1 |= MAS1_TSIZE(BOOK3E_PAGESZ_4K); stlbsel = 0; - sesel = kvmppc_e500_tlb0_map(vcpu_e500, esel, &stlbe); + kvmppc_e500_tlb0_map(vcpu_e500, esel, &stlbe); + sesel = 0; /* unused */ break; @@ -1052,7 +1061,7 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr, switch (tlbsel) { case 0: stlbsel = 0; - sesel = esel & (host_tlb_params[0].ways - 1); + sesel = 0; /* unused */ priv = &vcpu_e500->gtlb_priv[tlbsel][esel]; kvmppc_e500_setup_stlbe(vcpu_e500, gtlbe, BOOK3E_PAGESZ_4K, |