diff options
Diffstat (limited to 'arch/powerpc/kvm/e500_tlb.c')
| -rw-r--r-- | arch/powerpc/kvm/e500_tlb.c | 1077 |
1 files changed, 0 insertions, 1077 deletions
diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c deleted file mode 100644 index 13c432ea2fa..00000000000 --- a/arch/powerpc/kvm/e500_tlb.c +++ /dev/null @@ -1,1077 +0,0 @@ -/* - * Copyright (C) 2008-2011 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/slab.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" -#include "trace.h" -#include "timing.h" - -#define to_htlb1_esel(esel) (tlb1_entry_num - (esel) - 1) - -struct id { - unsigned long val; - struct id **pentry; -}; - -#define NUM_TIDS 256 - -/* - * This table provide mappings from: - * (guestAS,guestTID,guestPR) --> ID of physical cpu - * guestAS [0..1] - * guestTID [0..255] - * guestPR [0..1] - * ID [1..255] - * Each vcpu keeps one vcpu_id_table. - */ -struct vcpu_id_table { - struct id id[2][NUM_TIDS][2]; -}; - -/* - * This table provide reversed mappings of vcpu_id_table: - * ID --> address of vcpu_id_table item. - * Each physical core has one pcpu_id_table. - */ -struct pcpu_id_table { - struct id *entry[NUM_TIDS]; -}; - -static DEFINE_PER_CPU(struct pcpu_id_table, pcpu_sids); - -/* This variable keeps last used shadow ID on local core. - * The valid range of shadow ID is [1..255] */ -static DEFINE_PER_CPU(unsigned long, pcpu_last_used_sid); - -static unsigned int tlb1_entry_num; - -/* - * Allocate a free shadow id and setup a valid sid mapping in given entry. - * A mapping is only valid when vcpu_id_table and pcpu_id_table are match. - * - * The caller must have preemption disabled, and keep it that way until - * it has finished with the returned shadow id (either written into the - * TLB or arch.shadow_pid, or discarded). - */ -static inline int local_sid_setup_one(struct id *entry) -{ - unsigned long sid; - int ret = -1; - - sid = ++(__get_cpu_var(pcpu_last_used_sid)); - if (sid < NUM_TIDS) { - __get_cpu_var(pcpu_sids).entry[sid] = entry; - entry->val = sid; - entry->pentry = &__get_cpu_var(pcpu_sids).entry[sid]; - ret = sid; - } - - /* - * If sid == NUM_TIDS, we've run out of sids. We return -1, and - * the caller will invalidate everything and start over. - * - * sid > NUM_TIDS indicates a race, which we disable preemption to - * avoid. - */ - WARN_ON(sid > NUM_TIDS); - - return ret; -} - -/* - * Check if given entry contain a valid shadow id mapping. - * An ID mapping is considered valid only if - * both vcpu and pcpu know this mapping. - * - * The caller must have preemption disabled, and keep it that way until - * it has finished with the returned shadow id (either written into the - * TLB or arch.shadow_pid, or discarded). - */ -static inline int local_sid_lookup(struct id *entry) -{ - if (entry && entry->val != 0 && - __get_cpu_var(pcpu_sids).entry[entry->val] == entry && - entry->pentry == &__get_cpu_var(pcpu_sids).entry[entry->val]) - return entry->val; - return -1; -} - -/* Invalidate all id mappings on local core */ -static inline void local_sid_destroy_all(void) -{ - preempt_disable(); - __get_cpu_var(pcpu_last_used_sid) = 0; - memset(&__get_cpu_var(pcpu_sids), 0, sizeof(__get_cpu_var(pcpu_sids))); - preempt_enable(); -} - -static void *kvmppc_e500_id_table_alloc(struct kvmppc_vcpu_e500 *vcpu_e500) -{ - vcpu_e500->idt = kzalloc(sizeof(struct vcpu_id_table), GFP_KERNEL); - return vcpu_e500->idt; -} - -static void kvmppc_e500_id_table_free(struct kvmppc_vcpu_e500 *vcpu_e500) -{ - kfree(vcpu_e500->idt); -} - -/* Invalidate all mappings on vcpu */ -static void kvmppc_e500_id_table_reset_all(struct kvmppc_vcpu_e500 *vcpu_e500) -{ - memset(vcpu_e500->idt, 0, sizeof(struct vcpu_id_table)); - - /* Update shadow pid when mappings are changed */ - kvmppc_e500_recalc_shadow_pid(vcpu_e500); -} - -/* Invalidate one ID mapping on vcpu */ -static inline void kvmppc_e500_id_table_reset_one( - struct kvmppc_vcpu_e500 *vcpu_e500, - int as, int pid, int pr) -{ - struct vcpu_id_table *idt = vcpu_e500->idt; - - BUG_ON(as >= 2); - BUG_ON(pid >= NUM_TIDS); - BUG_ON(pr >= 2); - - idt->id[as][pid][pr].val = 0; - idt->id[as][pid][pr].pentry = NULL; - - /* Update shadow pid when mappings are changed */ - kvmppc_e500_recalc_shadow_pid(vcpu_e500); -} - -/* - * Map guest (vcpu,AS,ID,PR) to physical core shadow id. - * This function first lookup if a valid mapping exists, - * if not, then creates a new one. - * - * The caller must have preemption disabled, and keep it that way until - * it has finished with the returned shadow id (either written into the - * TLB or arch.shadow_pid, or discarded). - */ -static unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500, - unsigned int as, unsigned int gid, - unsigned int pr, int avoid_recursion) -{ - struct vcpu_id_table *idt = vcpu_e500->idt; - int sid; - - BUG_ON(as >= 2); - BUG_ON(gid >= NUM_TIDS); - BUG_ON(pr >= 2); - - sid = local_sid_lookup(&idt->id[as][gid][pr]); - - while (sid <= 0) { - /* No mapping yet */ - sid = local_sid_setup_one(&idt->id[as][gid][pr]); - if (sid <= 0) { - _tlbil_all(); - local_sid_destroy_all(); - } - - /* Update shadow pid when mappings are changed */ - if (!avoid_recursion) - kvmppc_e500_recalc_shadow_pid(vcpu_e500); - } - - return sid; -} - -/* Map guest pid to shadow. - * We use PID to keep shadow of current guest non-zero PID, - * and use PID1 to keep shadow of guest zero PID. - * So that guest tlbe with TID=0 can be accessed at any time */ -void kvmppc_e500_recalc_shadow_pid(struct kvmppc_vcpu_e500 *vcpu_e500) -{ - preempt_disable(); - vcpu_e500->vcpu.arch.shadow_pid = kvmppc_e500_get_sid(vcpu_e500, - get_cur_as(&vcpu_e500->vcpu), - get_cur_pid(&vcpu_e500->vcpu), - get_cur_pr(&vcpu_e500->vcpu), 1); - vcpu_e500->vcpu.arch.shadow_pid1 = kvmppc_e500_get_sid(vcpu_e500, - get_cur_as(&vcpu_e500->vcpu), 0, - get_cur_pr(&vcpu_e500->vcpu), 1); - preempt_enable(); -} - -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->gtlb_size[tlbsel]; i++) { - tlbe = &vcpu_e500->gtlb_arch[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); - } - } -} - -static inline unsigned int tlb0_get_next_victim( - struct kvmppc_vcpu_e500 *vcpu_e500) -{ - unsigned int victim; - - victim = vcpu_e500->gtlb_nv[0]++; - if (unlikely(vcpu_e500->gtlb_nv[0] >= KVM_E500_TLB0_WAY_NUM)) - vcpu_e500->gtlb_nv[0] = 0; - - return victim; -} - -static inline unsigned int tlb1_max_shadow_size(void) -{ - /* reserve one entry for magic page */ - return tlb1_entry_num - tlbcam_index - 1; -} - -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, uint32_t mas0) -{ - unsigned long flags; - - local_irq_save(flags); - mtspr(SPRN_MAS0, mas0); - mtspr(SPRN_MAS1, stlbe->mas1); - mtspr(SPRN_MAS2, stlbe->mas2); - mtspr(SPRN_MAS3, stlbe->mas3); - mtspr(SPRN_MAS7, stlbe->mas7); - asm volatile("isync; tlbwe" : : : "memory"); - local_irq_restore(flags); -} - -static inline void write_host_tlbe(struct kvmppc_vcpu_e500 *vcpu_e500, - int tlbsel, int esel, struct tlbe *stlbe) -{ - if (tlbsel == 0) { - __write_host_tlbe(stlbe, - MAS0_TLBSEL(0) | - MAS0_ESEL(esel & (KVM_E500_TLB0_WAY_NUM - 1))); - } else { - __write_host_tlbe(stlbe, - MAS0_TLBSEL(1) | - MAS0_ESEL(to_htlb1_esel(esel))); - } - trace_kvm_stlb_write(index_of(tlbsel, esel), stlbe->mas1, stlbe->mas2, - stlbe->mas3, stlbe->mas7); -} - -void kvmppc_map_magic(struct kvm_vcpu *vcpu) -{ - struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); - struct tlbe magic; - ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK; - unsigned int stid; - pfn_t pfn; - - pfn = (pfn_t)virt_to_phys((void *)shared_page) >> PAGE_SHIFT; - get_page(pfn_to_page(pfn)); - - preempt_disable(); - stid = kvmppc_e500_get_sid(vcpu_e500, 0, 0, 0, 0); - - magic.mas1 = MAS1_VALID | MAS1_TS | MAS1_TID(stid) | - MAS1_TSIZE(BOOK3E_PAGESZ_4K); - magic.mas2 = vcpu->arch.magic_page_ea | MAS2_M; - magic.mas3 = (pfn << PAGE_SHIFT) | - MAS3_SW | MAS3_SR | MAS3_UW | MAS3_UR; - magic.mas7 = pfn >> (32 - PAGE_SHIFT); - - __write_host_tlbe(&magic, MAS0_TLBSEL(1) | MAS0_ESEL(tlbcam_index)); - preempt_enable(); -} - -void kvmppc_e500_tlb_load(struct kvm_vcpu *vcpu, int cpu) -{ - struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); - - /* Shadow PID may be expired on local core */ - kvmppc_e500_recalc_shadow_pid(vcpu_e500); -} - -void kvmppc_e500_tlb_put(struct kvm_vcpu *vcpu) -{ -} - -static void kvmppc_e500_stlbe_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500, - int tlbsel, int esel) -{ - struct tlbe *gtlbe = &vcpu_e500->gtlb_arch[tlbsel][esel]; - struct vcpu_id_table *idt = vcpu_e500->idt; - unsigned int pr, tid, ts, pid; - u32 val, eaddr; - unsigned long flags; - - ts = get_tlb_ts(gtlbe); - tid = get_tlb_tid(gtlbe); - - preempt_disable(); - - /* One guest ID may be mapped to two shadow IDs */ - for (pr = 0; pr < 2; pr++) { - /* - * The shadow PID can have a valid mapping on at most one - * host CPU. In the common case, it will be valid on this - * CPU, in which case (for TLB0) we do a local invalidation - * of the specific address. - * - * If the shadow PID is not valid on the current host CPU, or - * if we're invalidating a TLB1 entry, we invalidate the - * entire shadow PID. - */ - if (tlbsel == 1 || - (pid = local_sid_lookup(&idt->id[ts][tid][pr])) <= 0) { - kvmppc_e500_id_table_reset_one(vcpu_e500, ts, tid, pr); - continue; - } - - /* - * The guest is invalidating a TLB0 entry which is in a PID - * that has a valid shadow mapping on this host CPU. We - * search host TLB0 to invalidate it's shadow TLB entry, - * similar to __tlbil_va except that we need to look in AS1. - */ - val = (pid << MAS6_SPID_SHIFT) | MAS6_SAS; - eaddr = get_tlb_eaddr(gtlbe); - - local_irq_save(flags); - - mtspr(SPRN_MAS6, val); - asm volatile("tlbsx 0, %[eaddr]" : : [eaddr] "r" (eaddr)); - val = mfspr(SPRN_MAS1); - if (val & MAS1_VALID) { - mtspr(SPRN_MAS1, val & ~MAS1_VALID); - asm volatile("tlbwe"); - } - - local_irq_restore(flags); - } - - preempt_enable(); -} - -/* 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 size = vcpu_e500->gtlb_size[tlbsel]; - int set_base; - int i; - - if (tlbsel == 0) { - int mask = size / KVM_E500_TLB0_WAY_NUM - 1; - set_base = (eaddr >> PAGE_SHIFT) & mask; - set_base *= KVM_E500_TLB0_WAY_NUM; - size = KVM_E500_TLB0_WAY_NUM; - } else { - set_base = 0; - } - - for (i = 0; i < size; i++) { - struct tlbe *tlbe = &vcpu_e500->gtlb_arch[tlbsel][set_base + 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 set_base + i; - } - - return -1; -} - -static inline void kvmppc_e500_priv_setup(struct tlbe_priv *priv, - struct tlbe *gtlbe, - pfn_t pfn) -{ - priv->pfn = pfn; - priv->flags = E500_TLB_VALID; - - if (tlbe_is_writable(gtlbe)) - priv->flags |= E500_TLB_DIRTY; -} - -static inline void kvmppc_e500_priv_release(struct tlbe_priv *priv) -{ - if (priv->flags & E500_TLB_VALID) { - if (priv->flags & E500_TLB_DIRTY) - kvm_release_pfn_dirty(priv->pfn); - else - kvm_release_pfn_clean(priv->pfn); - - priv->flags = 0; - } -} - -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->gtlb_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_setup_stlbe(struct kvmppc_vcpu_e500 *vcpu_e500, - struct tlbe *gtlbe, int tsize, - struct tlbe_priv *priv, - u64 gvaddr, struct tlbe *stlbe) -{ - pfn_t pfn = priv->pfn; - unsigned int stid; - - stid = kvmppc_e500_get_sid(vcpu_e500, get_tlb_ts(gtlbe), - get_tlb_tid(gtlbe), - get_cur_pr(&vcpu_e500->vcpu), 0); - - /* Force TS=1 IPROT=0 for all guest mappings. */ - stlbe->mas1 = MAS1_TSIZE(tsize) - | MAS1_TID(stid) | MAS1_TS | MAS1_VALID; - stlbe->mas2 = (gvaddr & MAS2_EPN) - | e500_shadow_mas2_attrib(gtlbe->mas2, - vcpu_e500->vcpu.arch.shared->msr & MSR_PR); - stlbe->mas3 = ((pfn << PAGE_SHIFT) & MAS3_RPN) - | e500_shadow_mas3_attrib(gtlbe->mas3, - vcpu_e500->vcpu.arch.shared->msr & MSR_PR); - stlbe->mas7 = (pfn >> (32 - PAGE_SHIFT)) & MAS7_RPN; -} - - -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 tlbe *stlbe) -{ - struct kvm_memory_slot *slot; - unsigned long pfn, hva; - int pfnmap = 0; - int tsize = BOOK3E_PAGESZ_4K; - struct tlbe_priv *priv; - - /* - * Translate guest physical to true physical, acquiring - * a page reference if it is normal, non-reserved memory. - * - * gfn_to_memslot() must succeed because otherwise we wouldn't - * have gotten this far. Eventually we should just pass the slot - * pointer through from the first lookup. - */ - slot = gfn_to_memslot(vcpu_e500->vcpu.kvm, gfn); - hva = gfn_to_hva_memslot(slot, gfn); - - if (tlbsel == 1) { - struct vm_area_struct *vma; - down_read(¤t->mm->mmap_sem); - - vma = find_vma(current->mm, hva); - if (vma && hva >= vma->vm_start && - (vma->vm_flags & VM_PFNMAP)) { - /* - * This VMA is a physically contiguous region (e.g. - * /dev/mem) that bypasses normal Linux page - * management. Find the overlap between the - * vma and the memslot. - */ - - unsigned long start, end; - unsigned long slot_start, slot_end; - - pfnmap = 1; - - start = vma->vm_pgoff; - end = start + - ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT); - - pfn = start + ((hva - vma->vm_start) >> PAGE_SHIFT); - - slot_start = pfn - (gfn - slot->base_gfn); - slot_end = slot_start + slot->npages; - - if (start < slot_start) - start = slot_start; - if (end > slot_end) - end = slot_end; - - tsize = (gtlbe->mas1 & MAS1_TSIZE_MASK) >> - MAS1_TSIZE_SHIFT; - - /* - * e500 doesn't implement the lowest tsize bit, - * or 1K pages. - */ - tsize = max(BOOK3E_PAGESZ_4K, tsize & ~1); - - /* - * Now find the largest tsize (up to what the guest - * requested) that will cover gfn, stay within the - * range, and for which gfn and pfn are mutually - * aligned. - */ - - for (; tsize > BOOK3E_PAGESZ_4K; tsize -= 2) { - unsigned long gfn_start, gfn_end, tsize_pages; - tsize_pages = 1 << (tsize - 2); - - gfn_start = gfn & ~(tsize_pages - 1); - gfn_end = gfn_start + tsize_pages; - - if (gfn_start + pfn - gfn < start) - continue; - if (gfn_end + pfn - gfn > end) - continue; - if ((gfn & (tsize_pages - 1)) != - (pfn & (tsize_pages - 1))) - continue; - - gvaddr &= ~((tsize_pages << PAGE_SHIFT) - 1); - pfn &= ~(tsize_pages - 1); - break; - } - } - - up_read(¤t->mm->mmap_sem); - } - - if (likely(!pfnmap)) { - pfn = gfn_to_pfn_memslot(vcpu_e500->vcpu.kvm, slot, gfn); - if (is_error_pfn(pfn)) { - printk(KERN_ERR "Couldn't get real page for gfn %lx!\n", - (long)gfn); - kvm_release_pfn_clean(pfn); - return; - } - } - - /* Drop old priv and setup new one. */ - priv = &vcpu_e500->gtlb_priv[tlbsel][esel]; - kvmppc_e500_priv_release(priv); - kvmppc_e500_priv_setup(priv, gtlbe, pfn); - - kvmppc_e500_setup_stlbe(vcpu_e500, gtlbe, tsize, priv, gvaddr, stlbe); -} - -/* 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 tlbe *stlbe) -{ - struct tlbe *gtlbe; - - gtlbe = &vcpu_e500->gtlb_arch[0][esel]; - - kvmppc_e500_shadow_map(vcpu_e500, get_tlb_eaddr(gtlbe), - get_tlb_raddr(gtlbe) >> PAGE_SHIFT, - gtlbe, 0, esel, stlbe); - - 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, struct tlbe *stlbe) -{ - unsigned int victim; - - victim = vcpu_e500->gtlb_nv[1]++; - - if (unlikely(vcpu_e500->gtlb_nv[1] >= tlb1_max_shadow_size())) - vcpu_e500->gtlb_nv[1] = 0; - - kvmppc_e500_shadow_map(vcpu_e500, gvaddr, gfn, gtlbe, 1, victim, stlbe); - - return victim; -} - -void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr) -{ - struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); - - /* Recalc shadow pid since MSR changes */ - kvmppc_e500_recalc_shadow_pid(vcpu_e500); -} - -static inline int kvmppc_e500_gtlbe_invalidate( - struct kvmppc_vcpu_e500 *vcpu_e500, - int tlbsel, int esel) -{ - struct tlbe *gtlbe = &vcpu_e500->gtlb_arch[tlbsel][esel]; - - if (unlikely(get_tlb_iprot(gtlbe))) - return -1; - - 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->gtlb_size[0]; esel++) - kvmppc_e500_gtlbe_invalidate(vcpu_e500, 0, esel); - if (value & MMUCSR0_TLB1FI) - for (esel = 0; esel < vcpu_e500->gtlb_size[1]; esel++) - kvmppc_e500_gtlbe_invalidate(vcpu_e500, 1, esel); - - /* Invalidate all vcpu id mappings */ - kvmppc_e500_id_table_reset_all(vcpu_e500); - - 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) ? kvmppc_get_gpr(vcpu, ra) : 0) + kvmppc_get_gpr(vcpu, 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->gtlb_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); - } - - /* Invalidate all vcpu id mappings */ - kvmppc_e500_id_table_reset_all(vcpu_e500); - - 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->gtlb_arch[tlbsel][esel]; - vcpu_e500->mas0 &= ~MAS0_NV(~0); - vcpu_e500->mas0 |= MAS0_NV(vcpu_e500->gtlb_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 = kvmppc_get_gpr(vcpu, rb); - - for (tlbsel = 0; tlbsel < 2; tlbsel++) { - esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, as); - if (esel >= 0) { - gtlbe = &vcpu_e500->gtlb_arch[tlbsel][esel]; - break; - } - } - - if (gtlbe) { - vcpu_e500->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(esel) - | MAS0_NV(vcpu_e500->gtlb_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->gtlb_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; - } - - kvmppc_set_exit_type(vcpu, EMULATED_TLBSX_EXITS); - return EMULATE_DONE; -} - -int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu) -{ - struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); - struct tlbe *gtlbe; - int tlbsel, esel; - - tlbsel = get_tlb_tlbsel(vcpu_e500); - esel = get_tlb_esel(vcpu_e500, tlbsel); - - gtlbe = &vcpu_e500->gtlb_arch[tlbsel][esel]; - - if (get_tlb_v(gtlbe)) - kvmppc_e500_stlbe_invalidate(vcpu_e500, tlbsel, esel); - - gtlbe->mas1 = vcpu_e500->mas1; - gtlbe->mas2 = vcpu_e500->mas2; - gtlbe->mas3 = vcpu_e500->mas3; - gtlbe->mas7 = vcpu_e500->mas7; - - trace_kvm_gtlb_write(vcpu_e500->mas0, gtlbe->mas1, gtlbe->mas2, - gtlbe->mas3, gtlbe->mas7); - - /* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */ - if (tlbe_is_host_safe(vcpu, gtlbe)) { - struct tlbe stlbe; - int stlbsel, sesel; - u64 eaddr; - u64 raddr; - - preempt_disable(); - switch (tlbsel) { - case 0: - /* TLB0 */ - gtlbe->mas1 &= ~MAS1_TSIZE(~0); - gtlbe->mas1 |= MAS1_TSIZE(BOOK3E_PAGESZ_4K); - - stlbsel = 0; - sesel = kvmppc_e500_tlb0_map(vcpu_e500, esel, &stlbe); - - 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, &stlbe); - break; - - default: - BUG(); - } - write_host_tlbe(vcpu_e500, stlbsel, sesel, &stlbe); - preempt_enable(); - } - - kvmppc_set_exit_type(vcpu, EMULATED_TLBWE_EXITS); - return EMULATE_DONE; -} - -int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr) -{ - unsigned int as = !!(vcpu->arch.shared->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.shared->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.shared->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.shared->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->gtlb_arch[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) -{ -} - -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); - struct tlbe_priv *priv; - struct tlbe *gtlbe, stlbe; - int tlbsel = tlbsel_of(index); - int esel = esel_of(index); - int stlbsel, sesel; - - gtlbe = &vcpu_e500->gtlb_arch[tlbsel][esel]; - - preempt_disable(); - switch (tlbsel) { - case 0: - stlbsel = 0; - sesel = esel; - priv = &vcpu_e500->gtlb_priv[stlbsel][sesel]; - - kvmppc_e500_setup_stlbe(vcpu_e500, gtlbe, BOOK3E_PAGESZ_4K, - priv, eaddr, &stlbe); - break; - - case 1: { - gfn_t gfn = gpaddr >> PAGE_SHIFT; - - stlbsel = 1; - sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr, gfn, - gtlbe, &stlbe); - break; - } - - default: - BUG(); - break; - } - - write_host_tlbe(vcpu_e500, stlbsel, sesel, &stlbe); - preempt_enable(); -} - -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_set_pid(struct kvm_vcpu *vcpu, u32 pid) -{ - struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); - - if (vcpu->arch.pid != pid) { - vcpu_e500->pid[0] = vcpu->arch.pid = pid; - kvmppc_e500_recalc_shadow_pid(vcpu_e500); - } -} - -void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *vcpu_e500) -{ - struct tlbe *tlbe; - - /* Insert large initial mapping for guest. */ - tlbe = &vcpu_e500->gtlb_arch[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->gtlb_arch[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->gtlb_size[0] = KVM_E500_TLB0_SIZE; - vcpu_e500->gtlb_arch[0] = - kzalloc(sizeof(struct tlbe) * KVM_E500_TLB0_SIZE, GFP_KERNEL); - if (vcpu_e500->gtlb_arch[0] == NULL) - goto err_out; - - vcpu_e500->gtlb_size[1] = KVM_E500_TLB1_SIZE; - vcpu_e500->gtlb_arch[1] = - kzalloc(sizeof(struct tlbe) * KVM_E500_TLB1_SIZE, GFP_KERNEL); - if (vcpu_e500->gtlb_arch[1] == NULL) - goto err_out_guest0; - - vcpu_e500->gtlb_priv[0] = (struct tlbe_priv *) - kzalloc(sizeof(struct tlbe_priv) * KVM_E500_TLB0_SIZE, GFP_KERNEL); - if (vcpu_e500->gtlb_priv[0] == NULL) - goto err_out_guest1; - vcpu_e500->gtlb_priv[1] = (struct tlbe_priv *) - kzalloc(sizeof(struct tlbe_priv) * KVM_E500_TLB1_SIZE, GFP_KERNEL); - - if (vcpu_e500->gtlb_priv[1] == NULL) - goto err_out_priv0; - - if (kvmppc_e500_id_table_alloc(vcpu_e500) == NULL) - goto err_out_priv1; - - /* Init TLB configuration register */ - vcpu_e500->tlb0cfg = mfspr(SPRN_TLB0CFG) & ~0xfffUL; - vcpu_e500->tlb0cfg |= vcpu_e500->gtlb_size[0]; - vcpu_e500->tlb1cfg = mfspr(SPRN_TLB1CFG) & ~0xfffUL; - vcpu_e500->tlb1cfg |= vcpu_e500->gtlb_size[1]; - - return 0; - -err_out_priv1: - kfree(vcpu_e500->gtlb_priv[1]); -err_out_priv0: - kfree(vcpu_e500->gtlb_priv[0]); -err_out_guest1: - kfree(vcpu_e500->gtlb_arch[1]); -err_out_guest0: - kfree(vcpu_e500->gtlb_arch[0]); -err_out: - return -1; -} - -void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500) -{ - int stlbsel, i; - - /* release all privs */ - for (stlbsel = 0; stlbsel < 2; stlbsel++) - for (i = 0; i < vcpu_e500->gtlb_size[stlbsel]; i++) { - struct tlbe_priv *priv = - &vcpu_e500->gtlb_priv[stlbsel][i]; - kvmppc_e500_priv_release(priv); - } - - kvmppc_e500_id_table_free(vcpu_e500); - kfree(vcpu_e500->gtlb_arch[1]); - kfree(vcpu_e500->gtlb_arch[0]); -} |