From bc8080cbcc8870178f0910edd537d0cb5706d703 Mon Sep 17 00:00:00 2001 From: Hollis Blanchard Date: Sat, 3 Jan 2009 16:23:10 -0600 Subject: KVM: ppc: E500 core-specific code Signed-off-by: Liu Yu Signed-off-by: Hollis Blanchard Signed-off-by: Avi Kivity --- arch/powerpc/kvm/e500_tlb.c | 737 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 737 insertions(+) create mode 100644 arch/powerpc/kvm/e500_tlb.c (limited to 'arch/powerpc/kvm/e500_tlb.c') diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c new file mode 100644 index 00000000000..6a50340f575 --- /dev/null +++ b/arch/powerpc/kvm/e500_tlb.c @@ -0,0 +1,737 @@ +/* + * Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved. + * + * Author: Yu Liu, yu.liu@freescale.com + * + * Description: + * This file is based on arch/powerpc/kvm/44x_tlb.c, + * by Hollis Blanchard . + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "e500_tlb.h" + +#define to_htlb1_esel(esel) (tlb1_entry_num - (esel) - 1) + +static unsigned int tlb1_entry_num; + +void kvmppc_dump_tlbs(struct kvm_vcpu *vcpu) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + struct tlbe *tlbe; + int i, tlbsel; + + printk("| %8s | %8s | %8s | %8s | %8s |\n", + "nr", "mas1", "mas2", "mas3", "mas7"); + + for (tlbsel = 0; tlbsel < 2; tlbsel++) { + printk("Guest TLB%d:\n", tlbsel); + for (i = 0; i < vcpu_e500->guest_tlb_size[tlbsel]; i++) { + tlbe = &vcpu_e500->guest_tlb[tlbsel][i]; + if (tlbe->mas1 & MAS1_VALID) + printk(" G[%d][%3d] | %08X | %08X | %08X | %08X |\n", + tlbsel, i, tlbe->mas1, tlbe->mas2, + tlbe->mas3, tlbe->mas7); + } + } + + for (tlbsel = 0; tlbsel < 2; tlbsel++) { + printk("Shadow TLB%d:\n", tlbsel); + for (i = 0; i < vcpu_e500->shadow_tlb_size[tlbsel]; i++) { + tlbe = &vcpu_e500->shadow_tlb[tlbsel][i]; + if (tlbe->mas1 & MAS1_VALID) + printk(" S[%d][%3d] | %08X | %08X | %08X | %08X |\n", + tlbsel, i, tlbe->mas1, tlbe->mas2, + tlbe->mas3, tlbe->mas7); + } + } +} + +static inline unsigned int tlb0_get_next_victim( + struct kvmppc_vcpu_e500 *vcpu_e500) +{ + unsigned int victim; + + victim = vcpu_e500->guest_tlb_nv[0]++; + if (unlikely(vcpu_e500->guest_tlb_nv[0] >= KVM_E500_TLB0_WAY_NUM)) + vcpu_e500->guest_tlb_nv[0] = 0; + + return victim; +} + +static inline unsigned int tlb1_max_shadow_size(void) +{ + return tlb1_entry_num - tlbcam_index; +} + +static inline int tlbe_is_writable(struct tlbe *tlbe) +{ + return tlbe->mas3 & (MAS3_SW|MAS3_UW); +} + +static inline u32 e500_shadow_mas3_attrib(u32 mas3, int usermode) +{ + /* Mask off reserved bits. */ + mas3 &= MAS3_ATTRIB_MASK; + + if (!usermode) { + /* Guest is in supervisor mode, + * so we need to translate guest + * supervisor permissions into user permissions. */ + mas3 &= ~E500_TLB_USER_PERM_MASK; + mas3 |= (mas3 & E500_TLB_SUPER_PERM_MASK) << 1; + } + + return mas3 | E500_TLB_SUPER_PERM_MASK; +} + +static inline u32 e500_shadow_mas2_attrib(u32 mas2, int usermode) +{ + return mas2 & MAS2_ATTRIB_MASK; +} + +/* + * writing shadow tlb entry to host TLB + */ +static inline void __write_host_tlbe(struct tlbe *stlbe) +{ + mtspr(SPRN_MAS1, stlbe->mas1); + mtspr(SPRN_MAS2, stlbe->mas2); + mtspr(SPRN_MAS3, stlbe->mas3); + mtspr(SPRN_MAS7, stlbe->mas7); + __asm__ __volatile__ ("tlbwe\n" : : ); +} + +static inline void write_host_tlbe(struct kvmppc_vcpu_e500 *vcpu_e500, + int tlbsel, int esel) +{ + struct tlbe *stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel]; + + local_irq_disable(); + if (tlbsel == 0) { + __write_host_tlbe(stlbe); + } else { + unsigned register mas0; + + mas0 = mfspr(SPRN_MAS0); + + mtspr(SPRN_MAS0, MAS0_TLBSEL(1) | MAS0_ESEL(to_htlb1_esel(esel))); + __write_host_tlbe(stlbe); + + mtspr(SPRN_MAS0, mas0); + } + local_irq_enable(); +} + +void kvmppc_e500_tlb_load(struct kvm_vcpu *vcpu, int cpu) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + int i; + unsigned register mas0; + + /* Load all valid TLB1 entries to reduce guest tlb miss fault */ + local_irq_disable(); + mas0 = mfspr(SPRN_MAS0); + for (i = 0; i < tlb1_max_shadow_size(); i++) { + struct tlbe *stlbe = &vcpu_e500->shadow_tlb[1][i]; + + if (get_tlb_v(stlbe)) { + mtspr(SPRN_MAS0, MAS0_TLBSEL(1) + | MAS0_ESEL(to_htlb1_esel(i))); + __write_host_tlbe(stlbe); + } + } + mtspr(SPRN_MAS0, mas0); + local_irq_enable(); +} + +void kvmppc_e500_tlb_put(struct kvm_vcpu *vcpu) +{ + _tlbia(); +} + +/* Search the guest TLB for a matching entry. */ +static int kvmppc_e500_tlb_index(struct kvmppc_vcpu_e500 *vcpu_e500, + gva_t eaddr, int tlbsel, unsigned int pid, int as) +{ + int i; + + /* XXX Replace loop with fancy data structures. */ + for (i = 0; i < vcpu_e500->guest_tlb_size[tlbsel]; i++) { + struct tlbe *tlbe = &vcpu_e500->guest_tlb[tlbsel][i]; + unsigned int tid; + + if (eaddr < get_tlb_eaddr(tlbe)) + continue; + + if (eaddr > get_tlb_end(tlbe)) + continue; + + tid = get_tlb_tid(tlbe); + if (tid && (tid != pid)) + continue; + + if (!get_tlb_v(tlbe)) + continue; + + if (get_tlb_ts(tlbe) != as && as != -1) + continue; + + return i; + } + + return -1; +} + +static void kvmppc_e500_shadow_release(struct kvmppc_vcpu_e500 *vcpu_e500, + int tlbsel, int esel) +{ + struct tlbe *stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel]; + struct page *page = vcpu_e500->shadow_pages[tlbsel][esel]; + + if (page) { + vcpu_e500->shadow_pages[tlbsel][esel] = NULL; + + if (get_tlb_v(stlbe)) { + if (tlbe_is_writable(stlbe)) + kvm_release_page_dirty(page); + else + kvm_release_page_clean(page); + } + } +} + +static void kvmppc_e500_stlbe_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500, + int tlbsel, int esel) +{ + struct tlbe *stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel]; + + kvmppc_e500_shadow_release(vcpu_e500, tlbsel, esel); + stlbe->mas1 = 0; + KVMTRACE_5D(STLB_INVAL, &vcpu_e500->vcpu, index_of(tlbsel, esel), + stlbe->mas1, stlbe->mas2, stlbe->mas3, stlbe->mas7, + handler); +} + +static void kvmppc_e500_tlb1_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500, + gva_t eaddr, gva_t eend, u32 tid) +{ + unsigned int pid = tid & 0xff; + unsigned int i; + + /* XXX Replace loop with fancy data structures. */ + for (i = 0; i < vcpu_e500->guest_tlb_size[1]; i++) { + struct tlbe *stlbe = &vcpu_e500->shadow_tlb[1][i]; + unsigned int tid; + + if (!get_tlb_v(stlbe)) + continue; + + if (eend < get_tlb_eaddr(stlbe)) + continue; + + if (eaddr > get_tlb_end(stlbe)) + continue; + + tid = get_tlb_tid(stlbe); + if (tid && (tid != pid)) + continue; + + kvmppc_e500_stlbe_invalidate(vcpu_e500, 1, i); + write_host_tlbe(vcpu_e500, 1, i); + } +} + +static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu, + unsigned int eaddr, int as) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + unsigned int victim, pidsel, tsized; + int tlbsel; + + /* since we only have tow TLBs, only lower bit is used. */ + tlbsel = (vcpu_e500->mas4 >> 28) & 0x1; + victim = (tlbsel == 0) ? tlb0_get_next_victim(vcpu_e500) : 0; + pidsel = (vcpu_e500->mas4 >> 16) & 0xf; + tsized = (vcpu_e500->mas4 >> 8) & 0xf; + + vcpu_e500->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim) + | MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]); + vcpu_e500->mas1 = MAS1_VALID | (as ? MAS1_TS : 0) + | MAS1_TID(vcpu_e500->pid[pidsel]) + | MAS1_TSIZE(tsized); + vcpu_e500->mas2 = (eaddr & MAS2_EPN) + | (vcpu_e500->mas4 & MAS2_ATTRIB_MASK); + vcpu_e500->mas3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3; + vcpu_e500->mas6 = (vcpu_e500->mas6 & MAS6_SPID1) + | (get_cur_pid(vcpu) << 16) + | (as ? MAS6_SAS : 0); + vcpu_e500->mas7 = 0; +} + +static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500, + u64 gvaddr, gfn_t gfn, struct tlbe *gtlbe, int tlbsel, int esel) +{ + struct page *new_page; + struct tlbe *stlbe; + hpa_t hpaddr; + + stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel]; + + /* Get reference to new page. */ + new_page = gfn_to_page(vcpu_e500->vcpu.kvm, gfn); + if (is_error_page(new_page)) { + printk(KERN_ERR "Couldn't get guest page for gfn %lx!\n", gfn); + kvm_release_page_clean(new_page); + return; + } + hpaddr = page_to_phys(new_page); + + /* Drop reference to old page. */ + kvmppc_e500_shadow_release(vcpu_e500, tlbsel, esel); + + vcpu_e500->shadow_pages[tlbsel][esel] = new_page; + + /* Force TS=1 IPROT=0 TSIZE=4KB for all guest mappings. */ + stlbe->mas1 = MAS1_TSIZE(BOOKE_PAGESZ_4K) + | MAS1_TID(get_tlb_tid(gtlbe)) | MAS1_TS | MAS1_VALID; + stlbe->mas2 = (gvaddr & MAS2_EPN) + | e500_shadow_mas2_attrib(gtlbe->mas2, + vcpu_e500->vcpu.arch.msr & MSR_PR); + stlbe->mas3 = (hpaddr & MAS3_RPN) + | e500_shadow_mas3_attrib(gtlbe->mas3, + vcpu_e500->vcpu.arch.msr & MSR_PR); + stlbe->mas7 = (hpaddr >> 32) & MAS7_RPN; + + KVMTRACE_5D(STLB_WRITE, &vcpu_e500->vcpu, index_of(tlbsel, esel), + stlbe->mas1, stlbe->mas2, stlbe->mas3, stlbe->mas7, + handler); +} + +/* XXX only map the one-one case, for now use TLB0 */ +static int kvmppc_e500_stlbe_map(struct kvmppc_vcpu_e500 *vcpu_e500, + int tlbsel, int esel) +{ + struct tlbe *gtlbe; + + gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel]; + + kvmppc_e500_shadow_map(vcpu_e500, get_tlb_eaddr(gtlbe), + get_tlb_raddr(gtlbe) >> PAGE_SHIFT, + gtlbe, tlbsel, esel); + + return esel; +} + +/* Caller must ensure that the specified guest TLB entry is safe to insert into + * the shadow TLB. */ +/* XXX for both one-one and one-to-many , for now use TLB1 */ +static int kvmppc_e500_tlb1_map(struct kvmppc_vcpu_e500 *vcpu_e500, + u64 gvaddr, gfn_t gfn, struct tlbe *gtlbe) +{ + unsigned int victim; + + victim = vcpu_e500->guest_tlb_nv[1]++; + + if (unlikely(vcpu_e500->guest_tlb_nv[1] >= tlb1_max_shadow_size())) + vcpu_e500->guest_tlb_nv[1] = 0; + + kvmppc_e500_shadow_map(vcpu_e500, gvaddr, gfn, gtlbe, 1, victim); + + return victim; +} + +/* Invalidate all guest kernel mappings when enter usermode, + * so that when they fault back in they will get the + * proper permission bits. */ +void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode) +{ + if (usermode) { + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + int i; + + /* XXX Replace loop with fancy data structures. */ + /* needn't set modified since tlbia will make TLB1 coherent */ + for (i = 0; i < tlb1_max_shadow_size(); i++) + kvmppc_e500_stlbe_invalidate(vcpu_e500, 1, i); + + _tlbia(); + } +} + +static int kvmppc_e500_gtlbe_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500, + int tlbsel, int esel) +{ + struct tlbe *gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel]; + + if (unlikely(get_tlb_iprot(gtlbe))) + return -1; + + if (tlbsel == 1) { + kvmppc_e500_tlb1_invalidate(vcpu_e500, get_tlb_eaddr(gtlbe), + get_tlb_end(gtlbe), + get_tlb_tid(gtlbe)); + } else { + kvmppc_e500_stlbe_invalidate(vcpu_e500, tlbsel, esel); + } + + gtlbe->mas1 = 0; + + return 0; +} + +int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + unsigned int ia; + int esel, tlbsel; + gva_t ea; + + ea = ((ra) ? vcpu->arch.gpr[ra] : 0) + vcpu->arch.gpr[rb]; + + ia = (ea >> 2) & 0x1; + + /* since we only have tow TLBs, only lower bit is used. */ + tlbsel = (ea >> 3) & 0x1; + + if (ia) { + /* invalidate all entries */ + for (esel = 0; esel < vcpu_e500->guest_tlb_size[tlbsel]; esel++) + kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); + } else { + ea &= 0xfffff000; + esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, + get_cur_pid(vcpu), -1); + if (esel >= 0) + kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); + } + + _tlbia(); + + return EMULATE_DONE; +} + +int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + int tlbsel, esel; + struct tlbe *gtlbe; + + tlbsel = get_tlb_tlbsel(vcpu_e500); + esel = get_tlb_esel(vcpu_e500, tlbsel); + + gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel]; + vcpu_e500->mas0 &= MAS0_NV(0); + vcpu_e500->mas0 |= MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]); + vcpu_e500->mas1 = gtlbe->mas1; + vcpu_e500->mas2 = gtlbe->mas2; + vcpu_e500->mas3 = gtlbe->mas3; + vcpu_e500->mas7 = gtlbe->mas7; + + return EMULATE_DONE; +} + +int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + int as = !!get_cur_sas(vcpu_e500); + unsigned int pid = get_cur_spid(vcpu_e500); + int esel, tlbsel; + struct tlbe *gtlbe = NULL; + gva_t ea; + + ea = vcpu->arch.gpr[rb]; + + for (tlbsel = 0; tlbsel < 2; tlbsel++) { + esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, as); + if (esel >= 0) { + gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel]; + break; + } + } + + if (gtlbe) { + vcpu_e500->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(esel) + | MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]); + vcpu_e500->mas1 = gtlbe->mas1; + vcpu_e500->mas2 = gtlbe->mas2; + vcpu_e500->mas3 = gtlbe->mas3; + vcpu_e500->mas7 = gtlbe->mas7; + } else { + int victim; + + /* since we only have tow TLBs, only lower bit is used. */ + tlbsel = vcpu_e500->mas4 >> 28 & 0x1; + victim = (tlbsel == 0) ? tlb0_get_next_victim(vcpu_e500) : 0; + + vcpu_e500->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim) + | MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]); + vcpu_e500->mas1 = (vcpu_e500->mas6 & MAS6_SPID0) + | (vcpu_e500->mas6 & (MAS6_SAS ? MAS1_TS : 0)) + | (vcpu_e500->mas4 & MAS4_TSIZED(~0)); + vcpu_e500->mas2 &= MAS2_EPN; + vcpu_e500->mas2 |= vcpu_e500->mas4 & MAS2_ATTRIB_MASK; + vcpu_e500->mas3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3; + vcpu_e500->mas7 = 0; + } + + return EMULATE_DONE; +} + +int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + u64 eaddr; + u64 raddr; + u32 tid; + struct tlbe *gtlbe; + int tlbsel, esel, stlbsel, sesel; + + tlbsel = get_tlb_tlbsel(vcpu_e500); + esel = get_tlb_esel(vcpu_e500, tlbsel); + + gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel]; + + if (get_tlb_v(gtlbe) && tlbsel == 1) { + eaddr = get_tlb_eaddr(gtlbe); + tid = get_tlb_tid(gtlbe); + kvmppc_e500_tlb1_invalidate(vcpu_e500, eaddr, + get_tlb_end(gtlbe), tid); + } + + gtlbe->mas1 = vcpu_e500->mas1; + gtlbe->mas2 = vcpu_e500->mas2; + gtlbe->mas3 = vcpu_e500->mas3; + gtlbe->mas7 = vcpu_e500->mas7; + + KVMTRACE_5D(GTLB_WRITE, vcpu, vcpu_e500->mas0, + gtlbe->mas1, gtlbe->mas2, gtlbe->mas3, gtlbe->mas7, + handler); + + /* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */ + if (tlbe_is_host_safe(vcpu, gtlbe)) { + switch (tlbsel) { + case 0: + /* TLB0 */ + gtlbe->mas1 &= ~MAS1_TSIZE(~0); + gtlbe->mas1 |= MAS1_TSIZE(BOOKE_PAGESZ_4K); + + stlbsel = 0; + sesel = kvmppc_e500_stlbe_map(vcpu_e500, 0, esel); + + break; + + case 1: + /* TLB1 */ + eaddr = get_tlb_eaddr(gtlbe); + raddr = get_tlb_raddr(gtlbe); + + /* Create a 4KB mapping on the host. + * If the guest wanted a large page, + * only the first 4KB is mapped here and the rest + * are mapped on the fly. */ + stlbsel = 1; + sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr, + raddr >> PAGE_SHIFT, gtlbe); + break; + + default: + BUG(); + } + write_host_tlbe(vcpu_e500, stlbsel, sesel); + } + + return EMULATE_DONE; +} + +int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr) +{ + unsigned int as = !!(vcpu->arch.msr & MSR_IS); + + return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as); +} + +int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr) +{ + unsigned int as = !!(vcpu->arch.msr & MSR_DS); + + return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as); +} + +void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu) +{ + unsigned int as = !!(vcpu->arch.msr & MSR_IS); + + kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.pc, as); +} + +void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu) +{ + unsigned int as = !!(vcpu->arch.msr & MSR_DS); + + kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.fault_dear, as); +} + +gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int index, + gva_t eaddr) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + struct tlbe *gtlbe = + &vcpu_e500->guest_tlb[tlbsel_of(index)][esel_of(index)]; + u64 pgmask = get_tlb_bytes(gtlbe) - 1; + + return get_tlb_raddr(gtlbe) | (eaddr & pgmask); +} + +void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + int tlbsel, i; + + for (tlbsel = 0; tlbsel < 2; tlbsel++) + for (i = 0; i < vcpu_e500->guest_tlb_size[tlbsel]; i++) + kvmppc_e500_shadow_release(vcpu_e500, tlbsel, i); + + /* discard all guest mapping */ + _tlbia(); +} + +void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr, + unsigned int index) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + int tlbsel = tlbsel_of(index); + int esel = esel_of(index); + int stlbsel, sesel; + + switch (tlbsel) { + case 0: + stlbsel = 0; + sesel = esel; + break; + + case 1: { + gfn_t gfn = gpaddr >> PAGE_SHIFT; + struct tlbe *gtlbe + = &vcpu_e500->guest_tlb[tlbsel][esel]; + + stlbsel = 1; + sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr, gfn, gtlbe); + break; + } + + default: + BUG(); + break; + } + write_host_tlbe(vcpu_e500, stlbsel, sesel); +} + +int kvmppc_e500_tlb_search(struct kvm_vcpu *vcpu, + gva_t eaddr, unsigned int pid, int as) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + int esel, tlbsel; + + for (tlbsel = 0; tlbsel < 2; tlbsel++) { + esel = kvmppc_e500_tlb_index(vcpu_e500, eaddr, tlbsel, pid, as); + if (esel >= 0) + return index_of(tlbsel, esel); + } + + return -1; +} + +void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *vcpu_e500) +{ + struct tlbe *tlbe; + + /* Insert large initial mapping for guest. */ + tlbe = &vcpu_e500->guest_tlb[1][0]; + tlbe->mas1 = MAS1_VALID | MAS1_TSIZE(BOOKE_PAGESZ_256M); + tlbe->mas2 = 0; + tlbe->mas3 = E500_TLB_SUPER_PERM_MASK; + tlbe->mas7 = 0; + + /* 4K map for serial output. Used by kernel wrapper. */ + tlbe = &vcpu_e500->guest_tlb[1][1]; + tlbe->mas1 = MAS1_VALID | MAS1_TSIZE(BOOKE_PAGESZ_4K); + tlbe->mas2 = (0xe0004500 & 0xFFFFF000) | MAS2_I | MAS2_G; + tlbe->mas3 = (0xe0004500 & 0xFFFFF000) | E500_TLB_SUPER_PERM_MASK; + tlbe->mas7 = 0; +} + +int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500) +{ + tlb1_entry_num = mfspr(SPRN_TLB1CFG) & 0xFFF; + + vcpu_e500->guest_tlb_size[0] = KVM_E500_TLB0_SIZE; + vcpu_e500->guest_tlb[0] = + kzalloc(sizeof(struct tlbe) * KVM_E500_TLB0_SIZE, GFP_KERNEL); + if (vcpu_e500->guest_tlb[0] == NULL) + goto err_out; + + vcpu_e500->shadow_tlb_size[0] = KVM_E500_TLB0_SIZE; + vcpu_e500->shadow_tlb[0] = + kzalloc(sizeof(struct tlbe) * KVM_E500_TLB0_SIZE, GFP_KERNEL); + if (vcpu_e500->shadow_tlb[0] == NULL) + goto err_out_guest0; + + vcpu_e500->guest_tlb_size[1] = KVM_E500_TLB1_SIZE; + vcpu_e500->guest_tlb[1] = + kzalloc(sizeof(struct tlbe) * KVM_E500_TLB1_SIZE, GFP_KERNEL); + if (vcpu_e500->guest_tlb[1] == NULL) + goto err_out_shadow0; + + vcpu_e500->shadow_tlb_size[1] = tlb1_entry_num; + vcpu_e500->shadow_tlb[1] = + kzalloc(sizeof(struct tlbe) * tlb1_entry_num, GFP_KERNEL); + if (vcpu_e500->shadow_tlb[1] == NULL) + goto err_out_guest1; + + vcpu_e500->shadow_pages[0] = (struct page **) + kzalloc(sizeof(struct page *) * KVM_E500_TLB0_SIZE, GFP_KERNEL); + if (vcpu_e500->shadow_pages[0] == NULL) + goto err_out_shadow1; + + vcpu_e500->shadow_pages[1] = (struct page **) + kzalloc(sizeof(struct page *) * tlb1_entry_num, GFP_KERNEL); + if (vcpu_e500->shadow_pages[1] == NULL) + goto err_out_page0; + + return 0; + +err_out_page0: + kfree(vcpu_e500->shadow_pages[0]); +err_out_shadow1: + kfree(vcpu_e500->shadow_tlb[1]); +err_out_guest1: + kfree(vcpu_e500->guest_tlb[1]); +err_out_shadow0: + kfree(vcpu_e500->shadow_tlb[0]); +err_out_guest0: + kfree(vcpu_e500->guest_tlb[0]); +err_out: + return -1; +} + +void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500) +{ + kfree(vcpu_e500->shadow_pages[1]); + kfree(vcpu_e500->shadow_pages[0]); + kfree(vcpu_e500->shadow_tlb[1]); + kfree(vcpu_e500->guest_tlb[1]); + kfree(vcpu_e500->shadow_tlb[0]); + kfree(vcpu_e500->guest_tlb[0]); +} -- cgit v1.2.3 From fb2838d446f6ee7e13e4149e08ec138753c5c450 Mon Sep 17 00:00:00 2001 From: Liu Yu Date: Wed, 14 Jan 2009 10:47:37 -0600 Subject: KVM: ppc: Fix e500 warnings and some spelling problems Signed-off-by: Avi Kivity --- arch/powerpc/kvm/e500_tlb.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/powerpc/kvm/e500_tlb.c') diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c index 6a50340f575..e3daf57b5f5 100644 --- a/arch/powerpc/kvm/e500_tlb.c +++ b/arch/powerpc/kvm/e500_tlb.c @@ -260,7 +260,7 @@ static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu, unsigned int victim, pidsel, tsized; int tlbsel; - /* since we only have tow TLBs, only lower bit is used. */ + /* since we only have two TLBs, only lower bit is used. */ tlbsel = (vcpu_e500->mas4 >> 28) & 0x1; victim = (tlbsel == 0) ? tlb0_get_next_victim(vcpu_e500) : 0; pidsel = (vcpu_e500->mas4 >> 16) & 0xf; @@ -402,7 +402,7 @@ int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb) ia = (ea >> 2) & 0x1; - /* since we only have tow TLBs, only lower bit is used. */ + /* since we only have two TLBs, only lower bit is used. */ tlbsel = (ea >> 3) & 0x1; if (ia) { @@ -471,7 +471,7 @@ int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb) } else { int victim; - /* since we only have tow TLBs, only lower bit is used. */ + /* since we only have two TLBs, only lower bit is used. */ tlbsel = vcpu_e500->mas4 >> 28 & 0x1; victim = (tlbsel == 0) ? tlb0_get_next_victim(vcpu_e500) : 0; -- cgit v1.2.3 From 9aa4dd5e5f47a5feb96fc394fccf0265ab7d85a4 Mon Sep 17 00:00:00 2001 From: Liu Yu Date: Wed, 14 Jan 2009 10:47:38 -0600 Subject: KVM: ppc: Move to new TLB invalidate interface Commit 2a4aca1144394653269720ffbb5a325a77abd5fa removed old method _tlbia(). Signed-off-by: Liu Yu Signed-off-by: Hollis Blanchard Signed-off-by: Avi Kivity --- arch/powerpc/kvm/e500_tlb.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'arch/powerpc/kvm/e500_tlb.c') diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c index e3daf57b5f5..d437160d388 100644 --- a/arch/powerpc/kvm/e500_tlb.c +++ b/arch/powerpc/kvm/e500_tlb.c @@ -20,6 +20,7 @@ #include #include +#include "../mm/mmu_decl.h" #include "e500_tlb.h" #define to_htlb1_esel(esel) (tlb1_entry_num - (esel) - 1) @@ -158,7 +159,7 @@ void kvmppc_e500_tlb_load(struct kvm_vcpu *vcpu, int cpu) void kvmppc_e500_tlb_put(struct kvm_vcpu *vcpu) { - _tlbia(); + _tlbil_all(); } /* Search the guest TLB for a matching entry. */ @@ -362,11 +363,10 @@ void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode) int i; /* XXX Replace loop with fancy data structures. */ - /* needn't set modified since tlbia will make TLB1 coherent */ for (i = 0; i < tlb1_max_shadow_size(); i++) kvmppc_e500_stlbe_invalidate(vcpu_e500, 1, i); - _tlbia(); + _tlbil_all(); } } @@ -417,7 +417,7 @@ int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb) kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel); } - _tlbia(); + _tlbil_all(); return EMULATE_DONE; } @@ -604,7 +604,7 @@ void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu) kvmppc_e500_shadow_release(vcpu_e500, tlbsel, i); /* discard all guest mapping */ - _tlbia(); + _tlbil_all(); } void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr, -- cgit v1.2.3 From b0a1835d53c57bc38b36867c04436b60454cb610 Mon Sep 17 00:00:00 2001 From: Liu Yu Date: Tue, 17 Feb 2009 16:52:08 +0800 Subject: KVM: ppc: Add emulation of E500 register mmucsr0 Latest kernel flushes TLB via mmucsr0. Signed-off-by: Liu Yu Acked-by: Hollis Blanchard Signed-off-by: Avi Kivity --- arch/powerpc/kvm/e500_tlb.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'arch/powerpc/kvm/e500_tlb.c') diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c index d437160d388..72386ddbd9d 100644 --- a/arch/powerpc/kvm/e500_tlb.c +++ b/arch/powerpc/kvm/e500_tlb.c @@ -391,6 +391,22 @@ static int kvmppc_e500_gtlbe_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500, return 0; } +int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value) +{ + int esel; + + if (value & MMUCSR0_TLB0FI) + for (esel = 0; esel < vcpu_e500->guest_tlb_size[0]; esel++) + kvmppc_e500_gtlbe_invalidate(vcpu_e500, 0, esel); + if (value & MMUCSR0_TLB1FI) + for (esel = 0; esel < vcpu_e500->guest_tlb_size[1]; esel++) + kvmppc_e500_gtlbe_invalidate(vcpu_e500, 1, esel); + + _tlbil_all(); + + return EMULATE_DONE; +} + int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb) { struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); -- cgit v1.2.3 From bc35cbc85cd78213590761618a13da6a9707652c Mon Sep 17 00:00:00 2001 From: Liu Yu Date: Tue, 17 Mar 2009 16:57:45 +0800 Subject: KVM: ppc: e500: Fix the bug that mas0 update to wrong value when read TLB entry Should clear and then update the next victim area here. Guest kernel only read TLB1 when startup kernel, this bug result in an extra 4K TLB1 mapping in guest from 0x0 to 0x0. As the problem has no impact to bootup a guest, we didn't notice it before. Signed-off-by: Liu Yu Signed-off-by: Avi Kivity --- arch/powerpc/kvm/e500_tlb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/powerpc/kvm/e500_tlb.c') diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c index 72386ddbd9d..ec933209e8a 100644 --- a/arch/powerpc/kvm/e500_tlb.c +++ b/arch/powerpc/kvm/e500_tlb.c @@ -448,7 +448,7 @@ int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu) esel = get_tlb_esel(vcpu_e500, tlbsel); gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel]; - vcpu_e500->mas0 &= MAS0_NV(0); + vcpu_e500->mas0 &= ~MAS0_NV(~0); vcpu_e500->mas0 |= MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]); vcpu_e500->mas1 = gtlbe->mas1; vcpu_e500->mas2 = gtlbe->mas2; -- cgit v1.2.3 From 046a48b35baa7c66d0d0331256ba12ca51665411 Mon Sep 17 00:00:00 2001 From: Liu Yu Date: Tue, 17 Mar 2009 16:57:46 +0800 Subject: KVM: ppc: e500: Fix the bug that KVM is unstable in SMP TLB entry should enable memory coherence in SMP. And like commit 631fba9dd3aca519355322cef035730609e91593, remove guard attribute to enable the prefetch of guest memory. Signed-off-by: Liu Yu Signed-off-by: Avi Kivity --- arch/powerpc/kvm/e500_tlb.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/powerpc/kvm/e500_tlb.c') diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c index ec933209e8a..0e773fc2d5e 100644 --- a/arch/powerpc/kvm/e500_tlb.c +++ b/arch/powerpc/kvm/e500_tlb.c @@ -99,7 +99,11 @@ static inline u32 e500_shadow_mas3_attrib(u32 mas3, int usermode) static inline u32 e500_shadow_mas2_attrib(u32 mas2, int usermode) { +#ifdef CONFIG_SMP + return (mas2 & MAS2_ATTRIB_MASK) | MAS2_M; +#else return mas2 & MAS2_ATTRIB_MASK; +#endif } /* -- cgit v1.2.3