| /* |
| * 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 <hollisb@us.ibm.com>. |
| * |
| * 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 <linux/types.h> |
| #include <linux/string.h> |
| #include <linux/kvm.h> |
| #include <linux/kvm_host.h> |
| #include <linux/highmem.h> |
| #include <asm/kvm_ppc.h> |
| #include <asm/kvm_e500.h> |
| |
| #include "../mm/mmu_decl.h" |
| #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) |
| { |
| #ifdef CONFIG_SMP |
| return (mas2 & MAS2_ATTRIB_MASK) | MAS2_M; |
| #else |
| return mas2 & MAS2_ATTRIB_MASK; |
| #endif |
| } |
| |
| /* |
| * 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) |
| { |
| _tlbil_all(); |
| } |
| |
| /* 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 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; |
| tsized = (vcpu_e500->mas4 >> 7) & 0x1f; |
| |
| 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(BOOK3E_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. */ |
| for (i = 0; i < tlb1_max_shadow_size(); i++) |
| kvmppc_e500_stlbe_invalidate(vcpu_e500, 1, i); |
| |
| _tlbil_all(); |
| } |
| } |
| |
| 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_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); |
| 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 two 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); |
| } |
| |
| _tlbil_all(); |
| |
| 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 two 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(BOOK3E_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 */ |
| _tlbil_all(); |
| } |
| |
| 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(BOOK3E_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(BOOK3E_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]); |
| } |