[PATCH 10/56] KVM: PPC: e500: refactor core-specific TLB code

Alexander Graf
2012-03-15T12:10:39Z

From: Scott Wood <scottwood@freescale.com>

The PID handling is e500v1/v2-specific, and is moved to e500.c.

The MMU sregs code and kvmppc_core_vcpu_translate will be shared with
e500mc, and is moved from e500.c to e500_tlb.c.

Partially based on patches from Liu Yu <yu.liu@freescale.com>.

Signed-off-by: Scott Wood <scottwood@freescale.com>
[agraf: fix bisectability]
Signed-off-by: Alexander Graf <agraf@suse.de>
---
arch/powerpc/include/asm/kvm_host.h | 2 +
arch/powerpc/kvm/e500.c | 357 +++++++++++++++++++++++----
arch/powerpc/kvm/e500.h | 62 ++++-
arch/powerpc/kvm/e500_emulate.c | 6 +-
arch/powerpc/kvm/e500_tlb.c | 460 +++++++++--------------------------
5 files changed, 473 insertions(+), 414 deletions(-)

diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 20ab5b2..5b81cbc 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -426,6 +426,8 @@ struct kvm_vcpu_arch {
ulong fault_esr;
ulong queued_dear;
ulong queued_esr;
+ u32 tlbcfg[4];
+ u32 mmucfg;
#endif
gpa_t paddr_accessed;

diff --git a/arch/powerpc/kvm/e500.c b/arch/powerpc/kvm/e500.c
index 76b35d8..b479ed7 100644
--- a/arch/powerpc/kvm/e500.c
+++ b/arch/powerpc/kvm/e500.c
@@ -22,9 +22,281 @@
#include <asm/tlbflush.h>
#include <asm/kvm_ppc.h>

+#include "../mm/mmu_decl.h"
#include "booke.h"
#include "e500.h"

+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);
+
+/*
+ * 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 -- call with preempt disabled */
+static inline void local_sid_destroy_all(void)
+{
+ __get_cpu_var(pcpu_last_used_sid) = 0;
+ memset(&__get_cpu_var(pcpu_sids), 0, sizeof(__get_cpu_var(pcpu_sids)));
+}
+
+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);
+ vcpu_e500->idt = NULL;
+}
+
+/* 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 */
+static 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();
+}
+
+/* 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).
+ */
+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;
+}
+
+unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu,
+ struct kvm_book3e_206_tlb_entry *gtlbe)
+{
+ return kvmppc_e500_get_sid(to_e500(vcpu), get_tlb_ts(gtlbe),
+ get_tlb_tid(gtlbe), get_cur_pr(vcpu), 0);
+}
+
+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);
+ }
+}
+
+/* gtlbe must not be mapped by more than one host tlbe */
+void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500,
+ struct kvm_book3e_206_tlb_entry *gtlbe)
+{
+ 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 we do a local invalidation of the
+ * specific address.
+ *
+ * If the shadow PID is not valid on the current host CPU,
+ * we invalidate the entire shadow PID.
+ */
+ pid = local_sid_lookup(&idt->id[ts][tid][pr]);
+ if (pid <= 0) {
+ kvmppc_e500_id_table_reset_one(vcpu_e500, ts, tid, pr);
+ continue;
+ }
+
+ /*
+ * The guest is invalidating a 4K entry which is in a PID
+ * that has a valid shadow mapping on this host CPU. We
+ * search host TLB 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();
+}
+
+void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500)
+{
+ kvmppc_e500_id_table_reset_all(vcpu_e500);
+}
+
+void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr)
+{
+ /* Recalc shadow pid since MSR changes */
+ kvmppc_e500_recalc_shadow_pid(to_e500(vcpu));
+}
+
void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
{
}
@@ -36,13 +308,13 @@ void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
kvmppc_booke_vcpu_load(vcpu, cpu);
- kvmppc_e500_tlb_load(vcpu, cpu);
+
+ /* Shadow PID may be expired on local core */
+ kvmppc_e500_recalc_shadow_pid(to_e500(vcpu));
}

void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
{
- kvmppc_e500_tlb_put(vcpu);
-
#ifdef CONFIG_SPE
if (vcpu->arch.shadow_msr & MSR_SPE)
kvmppc_vcpu_disable_spe(vcpu);
@@ -63,6 +335,23 @@ int kvmppc_core_check_processor_compat(void)
return r;
}

+static void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *vcpu_e500)
+{
+ struct kvm_book3e_206_tlb_entry *tlbe;
+
+ /* Insert large initial mapping for guest. */
+ tlbe = get_entry(vcpu_e500, 1, 0);
+ tlbe->mas1 = MAS1_VALID | MAS1_TSIZE(BOOK3E_PAGESZ_256M);
+ tlbe->mas2 = 0;
+ tlbe->mas7_3 = E500_TLB_SUPER_PERM_MASK;
+
+ /* 4K map for serial output. Used by kernel wrapper. */
+ tlbe = get_entry(vcpu_e500, 1, 1);
+ tlbe->mas1 = MAS1_VALID | MAS1_TSIZE(BOOK3E_PAGESZ_4K);
+ tlbe->mas2 = (0xe0004500 & 0xFFFFF000) | MAS2_I | MAS2_G;
+ tlbe->mas7_3 = (0xe0004500 & 0xFFFFF000) | E500_TLB_SUPER_PERM_MASK;
+}
+
int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
@@ -78,32 +367,6 @@ int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
return 0;
}

-/* 'linear_address' is actually an encoding of AS|PID|EADDR . */
-int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
- struct kvm_translation *tr)
-{
- int index;
- gva_t eaddr;
- u8 pid;
- u8 as;
-
- eaddr = tr->linear_address;
- pid = (tr->linear_address >> 32) & 0xff;
- as = (tr->linear_address >> 40) & 0x1;
-
- index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
- if (index < 0) {
- tr->valid = 0;
- return 0;
- }
-
- tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
- /* XXX what does "writeable" and "usermode" even mean? */
- tr->valid = 1;
-
- return 0;
-}
-
void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
@@ -117,19 +380,6 @@ void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0;
sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar;

- sregs->u.e.mas0 = vcpu->arch.shared->mas0;
- sregs->u.e.mas1 = vcpu->arch.shared->mas1;
- sregs->u.e.mas2 = vcpu->arch.shared->mas2;
- sregs->u.e.mas7_3 = vcpu->arch.shared->mas7_3;
- sregs->u.e.mas4 = vcpu->arch.shared->mas4;
- sregs->u.e.mas6 = vcpu->arch.shared->mas6;
-
- sregs->u.e.mmucfg = mfspr(SPRN_MMUCFG);
- sregs->u.e.tlbcfg[0] = vcpu_e500->tlb0cfg;
- sregs->u.e.tlbcfg[1] = vcpu_e500->tlb1cfg;
- sregs->u.e.tlbcfg[2] = 0;
- sregs->u.e.tlbcfg[3] = 0;
-
sregs->u.e.ivor_high[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL];
sregs->u.e.ivor_high[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA];
sregs->u.e.ivor_high[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND];
@@ -137,11 +387,13 @@ void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];

kvmppc_get_sregs_ivor(vcpu, sregs);
+ kvmppc_get_sregs_e500_tlb(vcpu, sregs);
}

int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+ int ret;

if (sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL) {
vcpu_e500->svr = sregs->u.e.impl.fsl.svr;
@@ -149,14 +401,9 @@ int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar;
}

- if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) {
- vcpu->arch.shared->mas0 = sregs->u.e.mas0;
- vcpu->arch.shared->mas1 = sregs->u.e.mas1;
- vcpu->arch.shared->mas2 = sregs->u.e.mas2;
- vcpu->arch.shared->mas7_3 = sregs->u.e.mas7_3;
- vcpu->arch.shared->mas4 = sregs->u.e.mas4;
- vcpu->arch.shared->mas6 = sregs->u.e.mas6;
- }
+ ret = kvmppc_set_sregs_e500_tlb(vcpu, sregs);
+ if (ret < 0)
+ return ret;

if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
return 0;
@@ -195,9 +442,12 @@ struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
if (err)
goto free_vcpu;

+ if (kvmppc_e500_id_table_alloc(vcpu_e500) = NULL)
+ goto uninit_vcpu;
+
err = kvmppc_e500_tlb_init(vcpu_e500);
if (err)
- goto uninit_vcpu;
+ goto uninit_id;

vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
if (!vcpu->arch.shared)
@@ -207,6 +457,8 @@ struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)

uninit_tlb:
kvmppc_e500_tlb_uninit(vcpu_e500);
+uninit_id:
+ kvmppc_e500_id_table_free(vcpu_e500);
uninit_vcpu:
kvm_vcpu_uninit(vcpu);
free_vcpu:
@@ -220,8 +472,9 @@ void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);

free_page((unsigned long)vcpu->arch.shared);
- kvm_vcpu_uninit(vcpu);
kvmppc_e500_tlb_uninit(vcpu_e500);
+ kvmppc_e500_id_table_free(vcpu_e500);
+ kvm_vcpu_uninit(vcpu);
kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
}

diff --git a/arch/powerpc/kvm/e500.h b/arch/powerpc/kvm/e500.h
index a48af00..34cef08 100644
--- a/arch/powerpc/kvm/e500.h
+++ b/arch/powerpc/kvm/e500.h
@@ -35,7 +35,9 @@ struct tlbe_priv {
struct tlbe_ref ref; /* TLB0 only -- TLB1 uses tlb_refs */
};

+#ifdef CONFIG_KVM_E500
struct vcpu_id_table;
+#endif

struct kvmppc_e500_tlb_params {
int entries, ways, sets;
@@ -70,23 +72,22 @@ struct kvmppc_vcpu_e500 {
struct tlbe_ref *tlb_refs[E500_TLB_NUM];
unsigned int host_tlb1_nv;

- u32 host_pid[E500_PID_NUM];
- u32 pid[E500_PID_NUM];
u32 svr;
-
- /* vcpu id table */
- struct vcpu_id_table *idt;
-
u32 l1csr0;
u32 l1csr1;
u32 hid0;
u32 hid1;
- u32 tlb0cfg;
- u32 tlb1cfg;
u64 mcar;

struct page **shared_tlb_pages;
int num_shared_tlb_pages;
+
+#ifdef CONFIG_KVM_E500
+ u32 pid[E500_PID_NUM];
+
+ /* vcpu id table */
+ struct vcpu_id_table *idt;
+#endif
};

static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu)
@@ -113,23 +114,25 @@ static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu)
(MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \
| E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)

-extern void kvmppc_e500_tlb_put(struct kvm_vcpu *);
-extern void kvmppc_e500_tlb_load(struct kvm_vcpu *, int);
-extern void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *);
-extern void kvmppc_e500_recalc_shadow_pid(struct kvmppc_vcpu_e500 *);
int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500,
ulong value);
int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu);
int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu);
int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb);
int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb);
-int kvmppc_e500_tlb_search(struct kvm_vcpu *, gva_t, unsigned int, int);
int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500);
void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500);

void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);

+
+#ifdef CONFIG_KVM_E500
+unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500,
+ unsigned int as, unsigned int gid,
+ unsigned int pr, int avoid_recursion);
+#endif
+
/* TLB helper functions */
static inline unsigned int
get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe)
@@ -183,6 +186,12 @@ get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe)
return (tlbe->mas1 >> 30) & 0x1;
}

+static inline unsigned int
+get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe)
+{
+ return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
+}
+
static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
{
return vcpu->arch.pid & 0xff;
@@ -248,4 +257,31 @@ static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
return 1;
}

+static inline struct kvm_book3e_206_tlb_entry *get_entry(
+ struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry)
+{
+ int offset = vcpu_e500->gtlb_offset[tlbsel];
+ return &vcpu_e500->gtlb_arch[offset + entry];
+}
+
+void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500,
+ struct kvm_book3e_206_tlb_entry *gtlbe);
+void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500);
+
+#ifdef CONFIG_KVM_E500
+unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu,
+ struct kvm_book3e_206_tlb_entry *gtlbe);
+
+static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu)
+{
+ struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+ unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf;
+
+ return vcpu_e500->pid[tidseld];
+}
+
+/* Force TS=1 for all guest mappings. */
+#define get_tlb_sts(gtlbe) (MAS1_TS)
+#endif /* CONFIG_KVM_E500 */
+
#endif /* KVM_E500_H */
diff --git a/arch/powerpc/kvm/e500_emulate.c b/arch/powerpc/kvm/e500_emulate.c
index 7e2d592..c80794d 100644
--- a/arch/powerpc/kvm/e500_emulate.c
+++ b/arch/powerpc/kvm/e500_emulate.c
@@ -174,9 +174,9 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
kvmppc_set_gpr(vcpu, rt, val);
break;
case SPRN_TLB0CFG:
- kvmppc_set_gpr(vcpu, rt, vcpu_e500->tlb0cfg); break;
+ kvmppc_set_gpr(vcpu, rt, vcpu->arch.tlbcfg[0]); break;
case SPRN_TLB1CFG:
- kvmppc_set_gpr(vcpu, rt, vcpu_e500->tlb1cfg); break;
+ kvmppc_set_gpr(vcpu, rt, vcpu->arch.tlbcfg[1]); break;
case SPRN_L1CSR0:
kvmppc_set_gpr(vcpu, rt, vcpu_e500->l1csr0); break;
case SPRN_L1CSR1:
@@ -192,7 +192,7 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
kvmppc_set_gpr(vcpu, rt, 0); break;

case SPRN_MMUCFG:
- kvmppc_set_gpr(vcpu, rt, mfspr(SPRN_MMUCFG)); break;
+ kvmppc_set_gpr(vcpu, rt, vcpu->arch.mmucfg); break;

/* extra exceptions */
case SPRN_IVOR32:
diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c
index 7d4a918..9925fc6 100644
--- a/arch/powerpc/kvm/e500_tlb.c
+++ b/arch/powerpc/kvm/e500_tlb.c
@@ -27,208 +27,14 @@
#include <linux/hugetlb.h>
#include <asm/kvm_ppc.h>

-#include "../mm/mmu_decl.h"
#include "e500.h"
#include "trace.h"
#include "timing.h"

#define to_htlb1_esel(esel) (host_tlb_params[1].entries - (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 struct kvmppc_e500_tlb_params host_tlb_params[E500_TLB_NUM];

-static struct kvm_book3e_206_tlb_entry *get_entry(
- struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry)
-{
- int offset = vcpu_e500->gtlb_offset[tlbsel];
- return &vcpu_e500->gtlb_arch[offset + entry];
-}
-
-/*
- * 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 -- call with preempt disabled */
-static inline void local_sid_destroy_all(void)
-{
- __get_cpu_var(pcpu_last_used_sid) = 0;
- memset(&__get_cpu_var(pcpu_sids), 0, sizeof(__get_cpu_var(pcpu_sids)));
-}
-
-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();
-}
-
static inline unsigned int gtlb0_get_next_victim(
struct kvmppc_vcpu_e500 *vcpu_e500)
{
@@ -336,6 +142,7 @@ static inline void write_host_tlbe(struct kvmppc_vcpu_e500 *vcpu_e500,
}
}

+#ifdef CONFIG_KVM_E500
void kvmppc_map_magic(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
@@ -360,75 +167,21 @@ void kvmppc_map_magic(struct kvm_vcpu *vcpu)
__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)
-{
-}
+#endif

static void inval_gtlbe_on_host(struct kvmppc_vcpu_e500 *vcpu_e500,
int tlbsel, int esel)
{
struct kvm_book3e_206_tlb_entry *gtlbe get_entry(vcpu_e500, 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);
+ if (tlbsel = 1) {
+ kvmppc_e500_tlbil_all(vcpu_e500);
+ return;
}

- preempt_enable();
+ /* Guest tlbe is backed by at most one host tlbe per shadow pid. */
+ kvmppc_e500_tlbil_one(vcpu_e500, gtlbe);
}

static int tlb0_set_base(gva_t addr, int sets, int ways)
@@ -546,7 +299,7 @@ static void clear_tlb_refs(struct kvmppc_vcpu_e500 *vcpu_e500)
int stlbsel = 1;
int i;

- kvmppc_e500_id_table_reset_all(vcpu_e500);
+ kvmppc_e500_tlbil_all(vcpu_e500);

for (i = 0; i < host_tlb_params[stlbsel].entries; i++) {
struct tlbe_ref *ref @@ -561,19 +314,18 @@ 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;
+ unsigned int victim, tsized;
int tlbsel;

/* since we only have two TLBs, only lower bit is used. */
tlbsel = (vcpu->arch.shared->mas4 >> 28) & 0x1;
victim = (tlbsel = 0) ? gtlb0_get_next_victim(vcpu_e500) : 0;
- pidsel = (vcpu->arch.shared->mas4 >> 16) & 0xf;
tsized = (vcpu->arch.shared->mas4 >> 7) & 0x1f;

vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim)
| MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
vcpu->arch.shared->mas1 = MAS1_VALID | (as ? MAS1_TS : 0)
- | MAS1_TID(vcpu_e500->pid[pidsel])
+ | MAS1_TID(get_tlbmiss_tid(vcpu))
| MAS1_TSIZE(tsized);
vcpu->arch.shared->mas2 = (eaddr & MAS2_EPN)
| (vcpu->arch.shared->mas4 & MAS2_ATTRIB_MASK);
@@ -585,23 +337,22 @@ static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu,

/* TID must be supplied by the caller */
static inline void kvmppc_e500_setup_stlbe(
- struct kvmppc_vcpu_e500 *vcpu_e500,
+ struct kvm_vcpu *vcpu,
struct kvm_book3e_206_tlb_entry *gtlbe,
int tsize, struct tlbe_ref *ref, u64 gvaddr,
struct kvm_book3e_206_tlb_entry *stlbe)
{
pfn_t pfn = ref->pfn;
+ u32 pr = vcpu->arch.shared->msr & MSR_PR;

BUG_ON(!(ref->flags & E500_TLB_VALID));

- /* Force TS=1 IPROT=0 for all guest mappings. */
- stlbe->mas1 = MAS1_TSIZE(tsize) | MAS1_TS | MAS1_VALID;
- stlbe->mas2 = (gvaddr & MAS2_EPN)
- | e500_shadow_mas2_attrib(gtlbe->mas2,
- vcpu_e500->vcpu.arch.shared->msr & MSR_PR);
- stlbe->mas7_3 = ((u64)pfn << PAGE_SHIFT)
- | e500_shadow_mas3_attrib(gtlbe->mas7_3,
- vcpu_e500->vcpu.arch.shared->msr & MSR_PR);
+ /* Force IPROT=0 for all guest mappings. */
+ stlbe->mas1 = MAS1_TSIZE(tsize) | get_tlb_sts(gtlbe) | MAS1_VALID;
+ stlbe->mas2 = (gvaddr & MAS2_EPN) |
+ e500_shadow_mas2_attrib(gtlbe->mas2, pr);
+ stlbe->mas7_3 = ((u64)pfn << PAGE_SHIFT) |
+ e500_shadow_mas3_attrib(gtlbe->mas7_3, pr);
}

static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
@@ -735,7 +486,8 @@ static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
kvmppc_e500_ref_release(ref);
kvmppc_e500_ref_setup(ref, gtlbe, pfn);

- kvmppc_e500_setup_stlbe(vcpu_e500, gtlbe, tsize, ref, gvaddr, stlbe);
+ kvmppc_e500_setup_stlbe(&vcpu_e500->vcpu, gtlbe, tsize,
+ ref, gvaddr, stlbe);
}

/* XXX only map the one-one case, for now use TLB0 */
@@ -775,14 +527,6 @@ static int kvmppc_e500_tlb1_map(struct kvmppc_vcpu_e500 *vcpu_e500,
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)
@@ -810,7 +554,7 @@ int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value)
kvmppc_e500_gtlbe_invalidate(vcpu_e500, 1, esel);

/* Invalidate all vcpu id mappings */
- kvmppc_e500_id_table_reset_all(vcpu_e500);
+ kvmppc_e500_tlbil_all(vcpu_e500);

return EMULATE_DONE;
}
@@ -843,7 +587,7 @@ int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb)
}

/* Invalidate all vcpu id mappings */
- kvmppc_e500_id_table_reset_all(vcpu_e500);
+ kvmppc_e500_tlbil_all(vcpu_e500);

return EMULATE_DONE;
}
@@ -928,9 +672,7 @@ static void write_stlbe(struct kvmppc_vcpu_e500 *vcpu_e500,
int stid;

preempt_disable();
- stid = kvmppc_e500_get_sid(vcpu_e500, get_tlb_ts(gtlbe),
- get_tlb_tid(gtlbe),
- get_cur_pr(&vcpu_e500->vcpu), 0);
+ stid = kvmppc_e500_get_tlb_stid(&vcpu_e500->vcpu, gtlbe);

stlbe->mas1 |= MAS1_TID(stid);
write_host_tlbe(vcpu_e500, stlbsel, sesel, stlbe);
@@ -940,8 +682,8 @@ static void write_stlbe(struct kvmppc_vcpu_e500 *vcpu_e500,
int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
- struct kvm_book3e_206_tlb_entry *gtlbe;
- int tlbsel, esel;
+ struct kvm_book3e_206_tlb_entry *gtlbe, stlbe;
+ int tlbsel, esel, stlbsel, sesel;

tlbsel = get_tlb_tlbsel(vcpu);
esel = get_tlb_esel(vcpu, tlbsel);
@@ -960,8 +702,6 @@ int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)

/* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
if (tlbe_is_host_safe(vcpu, gtlbe)) {
- struct kvm_book3e_206_tlb_entry stlbe;
- int stlbsel, sesel;
u64 eaddr;
u64 raddr;

@@ -988,7 +728,7 @@ int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
* are mapped on the fly. */
stlbsel = 1;
sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr,
- raddr >> PAGE_SHIFT, gtlbe, &stlbe);
+ raddr >> PAGE_SHIFT, gtlbe, &stlbe);
break;

default:
@@ -1002,6 +742,48 @@ int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
return EMULATE_DONE;
}

+static 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;
+}
+
+/* 'linear_address' is actually an encoding of AS|PID|EADDR . */
+int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
+ struct kvm_translation *tr)
+{
+ int index;
+ gva_t eaddr;
+ u8 pid;
+ u8 as;
+
+ eaddr = tr->linear_address;
+ pid = (tr->linear_address >> 32) & 0xff;
+ as = (tr->linear_address >> 40) & 0x1;
+
+ index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
+ if (index < 0) {
+ tr->valid = 0;
+ return 0;
+ }
+
+ tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
+ /* XXX what does "writeable" and "usermode" even mean? */
+ tr->valid = 1;
+
+ return 0;
+}
+
+
int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr)
{
unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS);
@@ -1065,7 +847,7 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr,
sesel = 0; /* unused */
priv = &vcpu_e500->gtlb_priv[tlbsel][esel];

- kvmppc_e500_setup_stlbe(vcpu_e500, gtlbe, BOOK3E_PAGESZ_4K,
+ kvmppc_e500_setup_stlbe(vcpu, gtlbe, BOOK3E_PAGESZ_4K,
&priv->ref, eaddr, &stlbe);
break;

@@ -1086,48 +868,6 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr,
write_stlbe(vcpu_e500, gtlbe, &stlbe, 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_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 kvm_book3e_206_tlb_entry *tlbe;
-
- /* Insert large initial mapping for guest. */
- tlbe = get_entry(vcpu_e500, 1, 0);
- tlbe->mas1 = MAS1_VALID | MAS1_TSIZE(BOOK3E_PAGESZ_256M);
- tlbe->mas2 = 0;
- tlbe->mas7_3 = E500_TLB_SUPER_PERM_MASK;
-
- /* 4K map for serial output. Used by kernel wrapper. */
- tlbe = get_entry(vcpu_e500, 1, 1);
- tlbe->mas1 = MAS1_VALID | MAS1_TSIZE(BOOK3E_PAGESZ_4K);
- tlbe->mas2 = (0xe0004500 & 0xFFFFF000) | MAS2_I | MAS2_G;
- tlbe->mas7_3 = (0xe0004500 & 0xFFFFF000) | E500_TLB_SUPER_PERM_MASK;
-}
-
static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500)
{
int i;
@@ -1154,6 +894,36 @@ static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500)
vcpu_e500->gtlb_arch = NULL;
}

+void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
+{
+ sregs->u.e.mas0 = vcpu->arch.shared->mas0;
+ sregs->u.e.mas1 = vcpu->arch.shared->mas1;
+ sregs->u.e.mas2 = vcpu->arch.shared->mas2;
+ sregs->u.e.mas7_3 = vcpu->arch.shared->mas7_3;
+ sregs->u.e.mas4 = vcpu->arch.shared->mas4;
+ sregs->u.e.mas6 = vcpu->arch.shared->mas6;
+
+ sregs->u.e.mmucfg = vcpu->arch.mmucfg;
+ sregs->u.e.tlbcfg[0] = vcpu->arch.tlbcfg[0];
+ sregs->u.e.tlbcfg[1] = vcpu->arch.tlbcfg[1];
+ sregs->u.e.tlbcfg[2] = 0;
+ sregs->u.e.tlbcfg[3] = 0;
+}
+
+int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
+{
+ if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) {
+ vcpu->arch.shared->mas0 = sregs->u.e.mas0;
+ vcpu->arch.shared->mas1 = sregs->u.e.mas1;
+ vcpu->arch.shared->mas2 = sregs->u.e.mas2;
+ vcpu->arch.shared->mas7_3 = sregs->u.e.mas7_3;
+ vcpu->arch.shared->mas4 = sregs->u.e.mas4;
+ vcpu->arch.shared->mas6 = sregs->u.e.mas6;
+ }
+
+ return 0;
+}
+
int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
struct kvm_config_tlb *cfg)
{
@@ -1237,14 +1007,16 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
vcpu_e500->gtlb_offset[0] = 0;
vcpu_e500->gtlb_offset[1] = params.tlb_sizes[0];

- vcpu_e500->tlb0cfg &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
+ vcpu->arch.mmucfg = mfspr(SPRN_MMUCFG) & ~MMUCFG_LPIDSIZE;
+
+ vcpu->arch.tlbcfg[0] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
if (params.tlb_sizes[0] <= 2048)
- vcpu_e500->tlb0cfg |= params.tlb_sizes[0];
- vcpu_e500->tlb0cfg |= params.tlb_ways[0] << TLBnCFG_ASSOC_SHIFT;
+ vcpu->arch.tlbcfg[0] |= params.tlb_sizes[0];
+ vcpu->arch.tlbcfg[0] |= params.tlb_ways[0] << TLBnCFG_ASSOC_SHIFT;

- vcpu_e500->tlb1cfg &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
- vcpu_e500->tlb1cfg |= params.tlb_sizes[1];
- vcpu_e500->tlb1cfg |= params.tlb_ways[1] << TLBnCFG_ASSOC_SHIFT;
+ vcpu->arch.tlbcfg[1] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
+ vcpu->arch.tlbcfg[1] |= params.tlb_sizes[1];
+ vcpu->arch.tlbcfg[1] |= params.tlb_ways[1] << TLBnCFG_ASSOC_SHIFT;

vcpu_e500->shared_tlb_pages = pages;
vcpu_e500->num_shared_tlb_pages = num_pages;
@@ -1280,6 +1052,7 @@ int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu,

int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500)
{
+ struct kvm_vcpu *vcpu = &vcpu_e500->vcpu;
int entry_size = sizeof(struct kvm_book3e_206_tlb_entry);
int entries = KVM_E500_TLB0_SIZE + KVM_E500_TLB1_SIZE;

@@ -1356,20 +1129,17 @@ int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500)
if (!vcpu_e500->gtlb_priv[1])
goto err;

- if (kvmppc_e500_id_table_alloc(vcpu_e500) = NULL)
- goto err;
-
/* Init TLB configuration register */
- vcpu_e500->tlb0cfg = mfspr(SPRN_TLB0CFG) &
+ vcpu->arch.tlbcfg[0] = mfspr(SPRN_TLB0CFG) &
~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
- vcpu_e500->tlb0cfg |= vcpu_e500->gtlb_params[0].entries;
- vcpu_e500->tlb0cfg |+ vcpu->arch.tlbcfg[0] |= vcpu_e500->gtlb_params[0].entries;
+ vcpu->arch.tlbcfg[0] | vcpu_e500->gtlb_params[0].ways << TLBnCFG_ASSOC_SHIFT;

- vcpu_e500->tlb1cfg = mfspr(SPRN_TLB1CFG) &
+ vcpu->arch.tlbcfg[1] = mfspr(SPRN_TLB1CFG) &
~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
- vcpu_e500->tlb0cfg |= vcpu_e500->gtlb_params[1].entries;
- vcpu_e500->tlb0cfg |+ vcpu->arch.tlbcfg[0] |= vcpu_e500->gtlb_params[1].entries;
+ vcpu->arch.tlbcfg[0] | vcpu_e500->gtlb_params[1].ways << TLBnCFG_ASSOC_SHIFT;

return 0;
@@ -1384,8 +1154,6 @@ err:
void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500)
{
free_gtlb(vcpu_e500);
- kvmppc_e500_id_table_free(vcpu_e500);
-
kfree(vcpu_e500->tlb_refs[0]);
kfree(vcpu_e500->tlb_refs[1]);
}
--
1.6.0.2