#include <asm/machdep.h>
#include <asm/mmu_context.h>
#include <asm/hw_irq.h>
+#include "trace.h"
#define PTE_SIZE 12
-#define VSID_ALL 0
-/* #define DEBUG_MMU */
-/* #define DEBUG_SLB */
-
-#ifdef DEBUG_MMU
-#define dprintk_mmu(a, ...) printk(KERN_INFO a, __VA_ARGS__)
-#else
-#define dprintk_mmu(a, ...) do { } while(0)
-#endif
-
-#ifdef DEBUG_SLB
-#define dprintk_slb(a, ...) printk(KERN_INFO a, __VA_ARGS__)
-#else
-#define dprintk_slb(a, ...) do { } while(0)
-#endif
-
-static void invalidate_pte(struct hpte_cache *pte)
+void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte)
{
- dprintk_mmu("KVM: Flushing SPT %d: 0x%llx (0x%llx) -> 0x%llx\n",
- i, pte->pte.eaddr, pte->pte.vpage, pte->host_va);
-
ppc_md.hpte_invalidate(pte->slot, pte->host_va,
MMU_PAGE_4K, MMU_SEGSIZE_256M,
false);
- pte->host_va = 0;
- kvm_release_pfn_dirty(pte->pfn);
-}
-
-void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, u64 guest_ea, u64 ea_mask)
-{
- int i;
-
- dprintk_mmu("KVM: Flushing %d Shadow PTEs: 0x%llx & 0x%llx\n",
- vcpu->arch.hpte_cache_offset, guest_ea, ea_mask);
- BUG_ON(vcpu->arch.hpte_cache_offset > HPTEG_CACHE_NUM);
-
- guest_ea &= ea_mask;
- for (i = 0; i < vcpu->arch.hpte_cache_offset; i++) {
- struct hpte_cache *pte;
-
- pte = &vcpu->arch.hpte_cache[i];
- if (!pte->host_va)
- continue;
-
- if ((pte->pte.eaddr & ea_mask) == guest_ea) {
- invalidate_pte(pte);
- }
- }
-
- /* Doing a complete flush -> start from scratch */
- if (!ea_mask)
- vcpu->arch.hpte_cache_offset = 0;
-}
-
-void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 guest_vp, u64 vp_mask)
-{
- int i;
-
- dprintk_mmu("KVM: Flushing %d Shadow vPTEs: 0x%llx & 0x%llx\n",
- vcpu->arch.hpte_cache_offset, guest_vp, vp_mask);
- BUG_ON(vcpu->arch.hpte_cache_offset > HPTEG_CACHE_NUM);
-
- guest_vp &= vp_mask;
- for (i = 0; i < vcpu->arch.hpte_cache_offset; i++) {
- struct hpte_cache *pte;
-
- pte = &vcpu->arch.hpte_cache[i];
- if (!pte->host_va)
- continue;
-
- if ((pte->pte.vpage & vp_mask) == guest_vp) {
- invalidate_pte(pte);
- }
- }
-}
-
-void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, u64 pa_start, u64 pa_end)
-{
- int i;
-
- dprintk_mmu("KVM: Flushing %d Shadow pPTEs: 0x%llx & 0x%llx\n",
- vcpu->arch.hpte_cache_offset, guest_pa, pa_mask);
- BUG_ON(vcpu->arch.hpte_cache_offset > HPTEG_CACHE_NUM);
-
- for (i = 0; i < vcpu->arch.hpte_cache_offset; i++) {
- struct hpte_cache *pte;
-
- pte = &vcpu->arch.hpte_cache[i];
- if (!pte->host_va)
- continue;
-
- if ((pte->pte.raddr >= pa_start) &&
- (pte->pte.raddr < pa_end)) {
- invalidate_pte(pte);
- }
- }
-}
-
-struct kvmppc_pte *kvmppc_mmu_find_pte(struct kvm_vcpu *vcpu, u64 ea, bool data)
-{
- int i;
- u64 guest_vp;
-
- guest_vp = vcpu->arch.mmu.ea_to_vp(vcpu, ea, false);
- for (i=0; i<vcpu->arch.hpte_cache_offset; i++) {
- struct hpte_cache *pte;
-
- pte = &vcpu->arch.hpte_cache[i];
- if (!pte->host_va)
- continue;
-
- if (pte->pte.vpage == guest_vp)
- return &pte->pte;
- }
-
- return NULL;
-}
-
-static int kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu)
-{
- if (vcpu->arch.hpte_cache_offset == HPTEG_CACHE_NUM)
- kvmppc_mmu_pte_flush(vcpu, 0, 0);
-
- return vcpu->arch.hpte_cache_offset++;
}
/* We keep 512 gvsid->hvsid entries, mapping the guest ones to the array using
struct kvmppc_sid_map *map;
u16 sid_map_mask;
- if (vcpu->arch.msr & MSR_PR)
+ if (vcpu->arch.shared->msr & MSR_PR)
gvsid |= VSID_PR;
sid_map_mask = kvmppc_sid_hash(vcpu, gvsid);
map = &to_book3s(vcpu)->sid_map[sid_map_mask];
- if (map->guest_vsid == gvsid) {
- dprintk_slb("SLB: Searching 0x%llx -> 0x%llx\n",
- gvsid, map->host_vsid);
+ if (map->valid && (map->guest_vsid == gvsid)) {
+ trace_kvm_book3s_slb_found(gvsid, map->host_vsid);
return map;
}
map = &to_book3s(vcpu)->sid_map[SID_MAP_MASK - sid_map_mask];
- if (map->guest_vsid == gvsid) {
- dprintk_slb("SLB: Searching 0x%llx -> 0x%llx\n",
- gvsid, map->host_vsid);
+ if (map->valid && (map->guest_vsid == gvsid)) {
+ trace_kvm_book3s_slb_found(gvsid, map->host_vsid);
return map;
}
- dprintk_slb("SLB: Searching 0x%llx -> not found\n", gvsid);
+ trace_kvm_book3s_slb_fail(sid_map_mask, gvsid);
return NULL;
}
int vflags = 0;
int attempt = 0;
struct kvmppc_sid_map *map;
+ int r = 0;
/* Get host physical address for gpa */
- hpaddr = gfn_to_pfn(vcpu->kvm, orig_pte->raddr >> PAGE_SHIFT);
- if (kvm_is_error_hva(hpaddr)) {
- printk(KERN_INFO "Couldn't get guest page for gfn %llx!\n", orig_pte->eaddr);
- return -EINVAL;
+ hpaddr = kvmppc_gfn_to_pfn(vcpu, orig_pte->raddr >> PAGE_SHIFT);
+ if (is_error_pfn(hpaddr)) {
+ printk(KERN_INFO "Couldn't get guest page for gfn %lx!\n", orig_pte->eaddr);
+ r = -EINVAL;
+ goto out;
}
hpaddr <<= PAGE_SHIFT;
-#if PAGE_SHIFT == 12
-#elif PAGE_SHIFT == 16
- hpaddr |= orig_pte->raddr & 0xf000;
-#else
-#error Unknown page size
-#endif
+ hpaddr |= orig_pte->raddr & (~0xfffULL & ~PAGE_MASK);
/* and write the mapping ea -> hpa into the pt */
vcpu->arch.mmu.esid_to_vsid(vcpu, orig_pte->eaddr >> SID_SHIFT, &vsid);
map = find_sid_vsid(vcpu, vsid);
if (!map) {
- kvmppc_mmu_map_segment(vcpu, orig_pte->eaddr);
+ ret = kvmppc_mmu_map_segment(vcpu, orig_pte->eaddr);
+ WARN_ON(ret < 0);
map = find_sid_vsid(vcpu, vsid);
}
- BUG_ON(!map);
+ if (!map) {
+ printk(KERN_ERR "KVM: Segment map for 0x%llx (0x%lx) failed\n",
+ vsid, orig_pte->eaddr);
+ WARN_ON(true);
+ r = -EINVAL;
+ goto out;
+ }
vsid = map->host_vsid;
va = hpt_va(orig_pte->eaddr, vsid, MMU_SEGSIZE_256M);
/* In case we tried normal mapping already, let's nuke old entries */
if (attempt > 1)
- if (ppc_md.hpte_remove(hpteg) < 0)
- return -1;
+ if (ppc_md.hpte_remove(hpteg) < 0) {
+ r = -1;
+ goto out;
+ }
ret = ppc_md.hpte_insert(hpteg, va, hpaddr, rflags, vflags, MMU_PAGE_4K, MMU_SEGSIZE_256M);
if (ret < 0) {
/* If we couldn't map a primary PTE, try a secondary */
-#ifdef USE_SECONDARY
hash = ~hash;
+ vflags ^= HPTE_V_SECONDARY;
attempt++;
- if (attempt % 2)
- vflags = HPTE_V_SECONDARY;
- else
- vflags = 0;
-#else
- attempt = 2;
-#endif
goto map_again;
} else {
- int hpte_id = kvmppc_mmu_hpte_cache_next(vcpu);
- struct hpte_cache *pte = &vcpu->arch.hpte_cache[hpte_id];
+ struct hpte_cache *pte = kvmppc_mmu_hpte_cache_next(vcpu);
- dprintk_mmu("KVM: %c%c Map 0x%llx: [%lx] 0x%lx (0x%llx) -> %lx\n",
- ((rflags & HPTE_R_PP) == 3) ? '-' : 'w',
- (rflags & HPTE_R_N) ? '-' : 'x',
- orig_pte->eaddr, hpteg, va, orig_pte->vpage, hpaddr);
+ trace_kvm_book3s_64_mmu_map(rflags, hpteg, va, hpaddr, orig_pte);
+
+ /* The ppc_md code may give us a secondary entry even though we
+ asked for a primary. Fix up. */
+ if ((ret & _PTEIDX_SECONDARY) && !(vflags & HPTE_V_SECONDARY)) {
+ hash = ~hash;
+ hpteg = ((hash & htab_hash_mask) * HPTES_PER_GROUP);
+ }
pte->slot = hpteg + (ret & 7);
pte->host_va = va;
pte->pte = *orig_pte;
pte->pfn = hpaddr >> PAGE_SHIFT;
+
+ kvmppc_mmu_hpte_cache_map(vcpu, pte);
}
- return 0;
+out:
+ return r;
}
static struct kvmppc_sid_map *create_sid_map(struct kvm_vcpu *vcpu, u64 gvsid)
u16 sid_map_mask;
static int backwards_map = 0;
- if (vcpu->arch.msr & MSR_PR)
+ if (vcpu->arch.shared->msr & MSR_PR)
gvsid |= VSID_PR;
/* We might get collisions that trap in preceding order, so let's
backwards_map = !backwards_map;
/* Uh-oh ... out of mappings. Let's flush! */
- if (vcpu_book3s->vsid_next == vcpu_book3s->vsid_max) {
- vcpu_book3s->vsid_next = vcpu_book3s->vsid_first;
+ if (vcpu_book3s->proto_vsid_next == vcpu_book3s->proto_vsid_max) {
+ vcpu_book3s->proto_vsid_next = vcpu_book3s->proto_vsid_first;
memset(vcpu_book3s->sid_map, 0,
sizeof(struct kvmppc_sid_map) * SID_MAP_NUM);
kvmppc_mmu_pte_flush(vcpu, 0, 0);
kvmppc_mmu_flush_segments(vcpu);
}
- map->host_vsid = vcpu_book3s->vsid_next++;
+ map->host_vsid = vsid_scramble(vcpu_book3s->proto_vsid_next++, 256M);
map->guest_vsid = gvsid;
map->valid = true;
+ trace_kvm_book3s_slb_map(sid_map_mask, gvsid, map->host_vsid);
+
return map;
}
static int kvmppc_mmu_next_segment(struct kvm_vcpu *vcpu, ulong esid)
{
+ struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
int i;
int max_slb_size = 64;
int found_inval = -1;
int r;
- if (!get_paca()->kvm_slb_max)
- get_paca()->kvm_slb_max = 1;
+ if (!svcpu->slb_max)
+ svcpu->slb_max = 1;
/* Are we overwriting? */
- for (i = 1; i < get_paca()->kvm_slb_max; i++) {
- if (!(get_paca()->kvm_slb[i].esid & SLB_ESID_V))
+ for (i = 1; i < svcpu->slb_max; i++) {
+ if (!(svcpu->slb[i].esid & SLB_ESID_V))
found_inval = i;
- else if ((get_paca()->kvm_slb[i].esid & ESID_MASK) == esid)
- return i;
+ else if ((svcpu->slb[i].esid & ESID_MASK) == esid) {
+ r = i;
+ goto out;
+ }
}
/* Found a spare entry that was invalidated before */
- if (found_inval > 0)
- return found_inval;
+ if (found_inval > 0) {
+ r = found_inval;
+ goto out;
+ }
/* No spare invalid entry, so create one */
max_slb_size = mmu_slb_size;
/* Overflowing -> purge */
- if ((get_paca()->kvm_slb_max) == max_slb_size)
+ if ((svcpu->slb_max) == max_slb_size)
kvmppc_mmu_flush_segments(vcpu);
- r = get_paca()->kvm_slb_max;
- get_paca()->kvm_slb_max++;
+ r = svcpu->slb_max;
+ svcpu->slb_max++;
+out:
+ svcpu_put(svcpu);
return r;
}
int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr)
{
+ struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
u64 esid = eaddr >> SID_SHIFT;
u64 slb_esid = (eaddr & ESID_MASK) | SLB_ESID_V;
u64 slb_vsid = SLB_VSID_USER;
u64 gvsid;
int slb_index;
struct kvmppc_sid_map *map;
+ int r = 0;
slb_index = kvmppc_mmu_next_segment(vcpu, eaddr & ESID_MASK);
if (vcpu->arch.mmu.esid_to_vsid(vcpu, esid, &gvsid)) {
/* Invalidate an entry */
- get_paca()->kvm_slb[slb_index].esid = 0;
- return -ENOENT;
+ svcpu->slb[slb_index].esid = 0;
+ r = -ENOENT;
+ goto out;
}
map = find_sid_vsid(vcpu, gvsid);
slb_vsid &= ~SLB_VSID_KP;
slb_esid |= slb_index;
- get_paca()->kvm_slb[slb_index].esid = slb_esid;
- get_paca()->kvm_slb[slb_index].vsid = slb_vsid;
+ svcpu->slb[slb_index].esid = slb_esid;
+ svcpu->slb[slb_index].vsid = slb_vsid;
- dprintk_slb("slbmte %#llx, %#llx\n", slb_vsid, slb_esid);
+ trace_kvm_book3s_slbmte(slb_vsid, slb_esid);
- return 0;
+out:
+ svcpu_put(svcpu);
+ return r;
}
void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu)
{
- get_paca()->kvm_slb_max = 1;
- get_paca()->kvm_slb[0].esid = 0;
+ struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
+ svcpu->slb_max = 1;
+ svcpu->slb[0].esid = 0;
+ svcpu_put(svcpu);
}
void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
{
- kvmppc_mmu_pte_flush(vcpu, 0, 0);
+ kvmppc_mmu_hpte_destroy(vcpu);
+ __destroy_context(to_book3s(vcpu)->context_id[0]);
+}
+
+int kvmppc_mmu_init(struct kvm_vcpu *vcpu)
+{
+ struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
+ int err;
+
+ err = __init_new_context();
+ if (err < 0)
+ return -1;
+ vcpu3s->context_id[0] = err;
+
+ vcpu3s->proto_vsid_max = ((vcpu3s->context_id[0] + 1)
+ << USER_ESID_BITS) - 1;
+ vcpu3s->proto_vsid_first = vcpu3s->context_id[0] << USER_ESID_BITS;
+ vcpu3s->proto_vsid_next = vcpu3s->proto_vsid_first;
+
+ kvmppc_mmu_hpte_init(vcpu);
+
+ return 0;
}
projects / linux-flexiantxendom0-3.2.10.git / blobdiff