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authorRadim Krčmář <rkrcmar@redhat.com>2018-02-09 21:36:57 +0100
committerRadim Krčmář <rkrcmar@redhat.com>2018-02-09 22:03:06 +0100
commit1ab03c072feb579c9fd116de25be2b211e6bff6a (patch)
treec207a69c7943a464a83c97c9cc02a45c30c42bfa
parent80132f4c0cf9e9966216ef4368bce530055dbb1d (diff)
parent09f984961c137c4b252c368adab7e1c9f035fa59 (diff)
Merge tag 'kvm-ppc-next-4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
Second PPC KVM update for 4.16 Seven fixes that are either trivial or that address bugs that people are actually hitting. The main ones are: - Drop spinlocks before reading guest memory - Fix a bug causing corruption of VCPU state in PR KVM with preemption enabled - Make HPT resizing work on POWER9 - Add MMIO emulation for vector loads and stores, because guests now use these instructions in memcpy and similar routines.
-rw-r--r--arch/powerpc/include/asm/kvm_book3s.h6
-rw-r--r--arch/powerpc/include/asm/kvm_host.h2
-rw-r--r--arch/powerpc/include/asm/kvm_ppc.h4
-rw-r--r--arch/powerpc/include/asm/ppc-opcode.h6
-rw-r--r--arch/powerpc/kvm/Kconfig2
-rw-r--r--arch/powerpc/kvm/book3s_64_mmu_hv.c38
-rw-r--r--arch/powerpc/kvm/book3s_hv.c16
-rw-r--r--arch/powerpc/kvm/book3s_hv_rmhandlers.S3
-rw-r--r--arch/powerpc/kvm/book3s_interrupts.S4
-rw-r--r--arch/powerpc/kvm/book3s_pr.c20
-rw-r--r--arch/powerpc/kvm/emulate_loadstore.c36
-rw-r--r--arch/powerpc/kvm/powerpc.c153
12 files changed, 251 insertions, 39 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h
index 9a667007bff8..376ae803b69c 100644
--- a/arch/powerpc/include/asm/kvm_book3s.h
+++ b/arch/powerpc/include/asm/kvm_book3s.h
@@ -249,10 +249,8 @@ extern int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd);
extern void kvmppc_pr_init_default_hcalls(struct kvm *kvm);
extern int kvmppc_hcall_impl_pr(unsigned long cmd);
extern int kvmppc_hcall_impl_hv_realmode(unsigned long cmd);
-extern void kvmppc_copy_to_svcpu(struct kvmppc_book3s_shadow_vcpu *svcpu,
- struct kvm_vcpu *vcpu);
-extern void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu,
- struct kvmppc_book3s_shadow_vcpu *svcpu);
+extern void kvmppc_copy_to_svcpu(struct kvm_vcpu *vcpu);
+extern void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu);
extern int kvm_irq_bypass;
static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index fef8133becc8..1f53b562726f 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -690,6 +690,7 @@ struct kvm_vcpu_arch {
u8 mmio_vsx_offset;
u8 mmio_vsx_copy_type;
u8 mmio_vsx_tx_sx_enabled;
+ u8 mmio_vmx_copy_nums;
u8 osi_needed;
u8 osi_enabled;
u8 papr_enabled;
@@ -804,6 +805,7 @@ struct kvm_vcpu_arch {
#define KVM_MMIO_REG_QPR 0x0040
#define KVM_MMIO_REG_FQPR 0x0060
#define KVM_MMIO_REG_VSX 0x0080
+#define KVM_MMIO_REG_VMX 0x00c0
#define __KVM_HAVE_ARCH_WQP
#define __KVM_HAVE_CREATE_DEVICE
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index 941c2a3f231b..28c203003519 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -81,6 +81,10 @@ extern int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
extern int kvmppc_handle_vsx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned int rt, unsigned int bytes,
int is_default_endian, int mmio_sign_extend);
+extern int kvmppc_handle_load128_by2x64(struct kvm_run *run,
+ struct kvm_vcpu *vcpu, unsigned int rt, int is_default_endian);
+extern int kvmppc_handle_store128_by2x64(struct kvm_run *run,
+ struct kvm_vcpu *vcpu, unsigned int rs, int is_default_endian);
extern int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
u64 val, unsigned int bytes,
int is_default_endian);
diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h
index ce0930d68857..a51febca08c5 100644
--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h
@@ -156,6 +156,12 @@
#define OP_31_XOP_LFDX 599
#define OP_31_XOP_LFDUX 631
+/* VMX Vector Load Instructions */
+#define OP_31_XOP_LVX 103
+
+/* VMX Vector Store Instructions */
+#define OP_31_XOP_STVX 231
+
#define OP_LWZ 32
#define OP_STFS 52
#define OP_STFSU 53
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index f884a0529dfe..68a0e9d5b440 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -69,7 +69,7 @@ config KVM_BOOK3S_64
select KVM_BOOK3S_64_HANDLER
select KVM
select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE
- select SPAPR_TCE_IOMMU if IOMMU_SUPPORT && (PPC_SERIES || PPC_POWERNV)
+ select SPAPR_TCE_IOMMU if IOMMU_SUPPORT && (PPC_PSERIES || PPC_POWERNV)
---help---
Support running unmodified book3s_64 and book3s_32 guest kernels
in virtual machines on book3s_64 host processors.
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index b73dbc9e797d..ef243fed2f2b 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -1269,6 +1269,11 @@ static unsigned long resize_hpt_rehash_hpte(struct kvm_resize_hpt *resize,
/* Nothing to do */
goto out;
+ if (cpu_has_feature(CPU_FTR_ARCH_300)) {
+ rpte = be64_to_cpu(hptep[1]);
+ vpte = hpte_new_to_old_v(vpte, rpte);
+ }
+
/* Unmap */
rev = &old->rev[idx];
guest_rpte = rev->guest_rpte;
@@ -1298,7 +1303,6 @@ static unsigned long resize_hpt_rehash_hpte(struct kvm_resize_hpt *resize,
/* Reload PTE after unmap */
vpte = be64_to_cpu(hptep[0]);
-
BUG_ON(vpte & HPTE_V_VALID);
BUG_ON(!(vpte & HPTE_V_ABSENT));
@@ -1307,6 +1311,12 @@ static unsigned long resize_hpt_rehash_hpte(struct kvm_resize_hpt *resize,
goto out;
rpte = be64_to_cpu(hptep[1]);
+
+ if (cpu_has_feature(CPU_FTR_ARCH_300)) {
+ vpte = hpte_new_to_old_v(vpte, rpte);
+ rpte = hpte_new_to_old_r(rpte);
+ }
+
pshift = kvmppc_hpte_base_page_shift(vpte, rpte);
avpn = HPTE_V_AVPN_VAL(vpte) & ~(((1ul << pshift) - 1) >> 23);
pteg = idx / HPTES_PER_GROUP;
@@ -1337,17 +1347,17 @@ static unsigned long resize_hpt_rehash_hpte(struct kvm_resize_hpt *resize,
}
new_pteg = hash & new_hash_mask;
- if (vpte & HPTE_V_SECONDARY) {
- BUG_ON(~pteg != (hash & old_hash_mask));
- new_pteg = ~new_pteg;
- } else {
- BUG_ON(pteg != (hash & old_hash_mask));
- }
+ if (vpte & HPTE_V_SECONDARY)
+ new_pteg = ~hash & new_hash_mask;
new_idx = new_pteg * HPTES_PER_GROUP + (idx % HPTES_PER_GROUP);
new_hptep = (__be64 *)(new->virt + (new_idx << 4));
replace_vpte = be64_to_cpu(new_hptep[0]);
+ if (cpu_has_feature(CPU_FTR_ARCH_300)) {
+ unsigned long replace_rpte = be64_to_cpu(new_hptep[1]);
+ replace_vpte = hpte_new_to_old_v(replace_vpte, replace_rpte);
+ }
if (replace_vpte & (HPTE_V_VALID | HPTE_V_ABSENT)) {
BUG_ON(new->order >= old->order);
@@ -1363,6 +1373,11 @@ static unsigned long resize_hpt_rehash_hpte(struct kvm_resize_hpt *resize,
/* Discard the previous HPTE */
}
+ if (cpu_has_feature(CPU_FTR_ARCH_300)) {
+ rpte = hpte_old_to_new_r(vpte, rpte);
+ vpte = hpte_old_to_new_v(vpte);
+ }
+
new_hptep[1] = cpu_to_be64(rpte);
new->rev[new_idx].guest_rpte = guest_rpte;
/* No need for a barrier, since new HPT isn't active */
@@ -1380,12 +1395,6 @@ static int resize_hpt_rehash(struct kvm_resize_hpt *resize)
unsigned long i;
int rc;
- /*
- * resize_hpt_rehash_hpte() doesn't handle the new-format HPTEs
- * that POWER9 uses, and could well hit a BUG_ON on POWER9.
- */
- if (cpu_has_feature(CPU_FTR_ARCH_300))
- return -EIO;
for (i = 0; i < kvmppc_hpt_npte(&kvm->arch.hpt); i++) {
rc = resize_hpt_rehash_hpte(resize, i);
if (rc != 0)
@@ -1416,6 +1425,9 @@ static void resize_hpt_pivot(struct kvm_resize_hpt *resize)
synchronize_srcu_expedited(&kvm->srcu);
+ if (cpu_has_feature(CPU_FTR_ARCH_300))
+ kvmppc_setup_partition_table(kvm);
+
resize_hpt_debug(resize, "resize_hpt_pivot() done\n");
}
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index e5f81fc108e0..aa6130b56b5e 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -1008,8 +1008,6 @@ static int kvmppc_emulate_doorbell_instr(struct kvm_vcpu *vcpu)
struct kvm *kvm = vcpu->kvm;
struct kvm_vcpu *tvcpu;
- if (!cpu_has_feature(CPU_FTR_ARCH_300))
- return EMULATE_FAIL;
if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &inst) != EMULATE_DONE)
return RESUME_GUEST;
if (get_op(inst) != 31)
@@ -1059,6 +1057,7 @@ static int kvmppc_emulate_doorbell_instr(struct kvm_vcpu *vcpu)
return RESUME_GUEST;
}
+/* Called with vcpu->arch.vcore->lock held */
static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu,
struct task_struct *tsk)
{
@@ -1179,7 +1178,10 @@ static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu,
swab32(vcpu->arch.emul_inst) :
vcpu->arch.emul_inst;
if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) {
+ /* Need vcore unlocked to call kvmppc_get_last_inst */
+ spin_unlock(&vcpu->arch.vcore->lock);
r = kvmppc_emulate_debug_inst(run, vcpu);
+ spin_lock(&vcpu->arch.vcore->lock);
} else {
kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
r = RESUME_GUEST;
@@ -1194,8 +1196,13 @@ static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu,
*/
case BOOK3S_INTERRUPT_H_FAC_UNAVAIL:
r = EMULATE_FAIL;
- if ((vcpu->arch.hfscr >> 56) == FSCR_MSGP_LG)
+ if (((vcpu->arch.hfscr >> 56) == FSCR_MSGP_LG) &&
+ cpu_has_feature(CPU_FTR_ARCH_300)) {
+ /* Need vcore unlocked to call kvmppc_get_last_inst */
+ spin_unlock(&vcpu->arch.vcore->lock);
r = kvmppc_emulate_doorbell_instr(vcpu);
+ spin_lock(&vcpu->arch.vcore->lock);
+ }
if (r == EMULATE_FAIL) {
kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
r = RESUME_GUEST;
@@ -2946,13 +2953,14 @@ static noinline void kvmppc_run_core(struct kvmppc_vcore *vc)
/* make sure updates to secondary vcpu structs are visible now */
smp_mb();
+ preempt_enable();
+
for (sub = 0; sub < core_info.n_subcores; ++sub) {
pvc = core_info.vc[sub];
post_guest_process(pvc, pvc == vc);
}
spin_lock(&vc->lock);
- preempt_enable();
out:
vc->vcore_state = VCORE_INACTIVE;
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index b64f10a5f5e7..875195369354 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -413,10 +413,11 @@ FTR_SECTION_ELSE
/* On P9 we use the split_info for coordinating LPCR changes */
lwz r4, KVM_SPLIT_DO_SET(r6)
cmpwi r4, 0
- beq 63f
+ beq 1f
mr r3, r6
bl kvmhv_p9_set_lpcr
nop
+1:
ALT_FTR_SECTION_END_IFCLR(CPU_FTR_ARCH_300)
63:
/* Order load of vcpu after load of vcore */
diff --git a/arch/powerpc/kvm/book3s_interrupts.S b/arch/powerpc/kvm/book3s_interrupts.S
index 901e6fe00c39..c18e845019ec 100644
--- a/arch/powerpc/kvm/book3s_interrupts.S
+++ b/arch/powerpc/kvm/book3s_interrupts.S
@@ -96,7 +96,7 @@ kvm_start_entry:
kvm_start_lightweight:
/* Copy registers into shadow vcpu so we can access them in real mode */
- GET_SHADOW_VCPU(r3)
+ mr r3, r4
bl FUNC(kvmppc_copy_to_svcpu)
nop
REST_GPR(4, r1)
@@ -165,9 +165,7 @@ after_sprg3_load:
stw r12, VCPU_TRAP(r3)
/* Transfer reg values from shadow vcpu back to vcpu struct */
- /* On 64-bit, interrupts are still off at this point */
- GET_SHADOW_VCPU(r4)
bl FUNC(kvmppc_copy_from_svcpu)
nop
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 7deaeeb14b93..3ae752314b34 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -121,7 +121,7 @@ static void kvmppc_core_vcpu_put_pr(struct kvm_vcpu *vcpu)
#ifdef CONFIG_PPC_BOOK3S_64
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
if (svcpu->in_use) {
- kvmppc_copy_from_svcpu(vcpu, svcpu);
+ kvmppc_copy_from_svcpu(vcpu);
}
memcpy(to_book3s(vcpu)->slb_shadow, svcpu->slb, sizeof(svcpu->slb));
to_book3s(vcpu)->slb_shadow_max = svcpu->slb_max;
@@ -143,9 +143,10 @@ static void kvmppc_core_vcpu_put_pr(struct kvm_vcpu *vcpu)
}
/* Copy data needed by real-mode code from vcpu to shadow vcpu */
-void kvmppc_copy_to_svcpu(struct kvmppc_book3s_shadow_vcpu *svcpu,
- struct kvm_vcpu *vcpu)
+void kvmppc_copy_to_svcpu(struct kvm_vcpu *vcpu)
{
+ struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
+
svcpu->gpr[0] = vcpu->arch.gpr[0];
svcpu->gpr[1] = vcpu->arch.gpr[1];
svcpu->gpr[2] = vcpu->arch.gpr[2];
@@ -177,17 +178,14 @@ void kvmppc_copy_to_svcpu(struct kvmppc_book3s_shadow_vcpu *svcpu,
if (cpu_has_feature(CPU_FTR_ARCH_207S))
vcpu->arch.entry_ic = mfspr(SPRN_IC);
svcpu->in_use = true;
+
+ svcpu_put(svcpu);
}
/* Copy data touched by real-mode code from shadow vcpu back to vcpu */
-void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu,
- struct kvmppc_book3s_shadow_vcpu *svcpu)
+void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu)
{
- /*
- * vcpu_put would just call us again because in_use hasn't
- * been updated yet.
- */
- preempt_disable();
+ struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
/*
* Maybe we were already preempted and synced the svcpu from
@@ -233,7 +231,7 @@ void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu,
svcpu->in_use = false;
out:
- preempt_enable();
+ svcpu_put(svcpu);
}
static int kvmppc_core_check_requests_pr(struct kvm_vcpu *vcpu)
diff --git a/arch/powerpc/kvm/emulate_loadstore.c b/arch/powerpc/kvm/emulate_loadstore.c
index af833531af31..a382e15135e6 100644
--- a/arch/powerpc/kvm/emulate_loadstore.c
+++ b/arch/powerpc/kvm/emulate_loadstore.c
@@ -58,6 +58,18 @@ static bool kvmppc_check_vsx_disabled(struct kvm_vcpu *vcpu)
}
#endif /* CONFIG_VSX */
+#ifdef CONFIG_ALTIVEC
+static bool kvmppc_check_altivec_disabled(struct kvm_vcpu *vcpu)
+{
+ if (!(kvmppc_get_msr(vcpu) & MSR_VEC)) {
+ kvmppc_core_queue_vec_unavail(vcpu);
+ return true;
+ }
+
+ return false;
+}
+#endif /* CONFIG_ALTIVEC */
+
/*
* XXX to do:
* lfiwax, lfiwzx
@@ -98,6 +110,7 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu)
vcpu->arch.mmio_vsx_copy_type = KVMPPC_VSX_COPY_NONE;
vcpu->arch.mmio_sp64_extend = 0;
vcpu->arch.mmio_sign_extend = 0;
+ vcpu->arch.mmio_vmx_copy_nums = 0;
switch (get_op(inst)) {
case 31:
@@ -459,6 +472,29 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu)
rs, 4, 1);
break;
#endif /* CONFIG_VSX */
+
+#ifdef CONFIG_ALTIVEC
+ case OP_31_XOP_LVX:
+ if (kvmppc_check_altivec_disabled(vcpu))
+ return EMULATE_DONE;
+ vcpu->arch.vaddr_accessed &= ~0xFULL;
+ vcpu->arch.paddr_accessed &= ~0xFULL;
+ vcpu->arch.mmio_vmx_copy_nums = 2;
+ emulated = kvmppc_handle_load128_by2x64(run, vcpu,
+ KVM_MMIO_REG_VMX|rt, 1);
+ break;
+
+ case OP_31_XOP_STVX:
+ if (kvmppc_check_altivec_disabled(vcpu))
+ return EMULATE_DONE;
+ vcpu->arch.vaddr_accessed &= ~0xFULL;
+ vcpu->arch.paddr_accessed &= ~0xFULL;
+ vcpu->arch.mmio_vmx_copy_nums = 2;
+ emulated = kvmppc_handle_store128_by2x64(run, vcpu,
+ rs, 1);
+ break;
+#endif /* CONFIG_ALTIVEC */
+
default:
emulated = EMULATE_FAIL;
break;
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 748562ec9a04..403e642c78f5 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -638,8 +638,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = 1;
break;
case KVM_CAP_SPAPR_RESIZE_HPT:
- /* Disable this on POWER9 until code handles new HPTE format */
- r = !!hv_enabled && !cpu_has_feature(CPU_FTR_ARCH_300);
+ r = !!hv_enabled;
break;
#endif
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
@@ -930,6 +929,34 @@ static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
}
#endif /* CONFIG_VSX */
+#ifdef CONFIG_ALTIVEC
+static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
+ u64 gpr)
+{
+ int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
+ u32 hi, lo;
+ u32 di;
+
+#ifdef __BIG_ENDIAN
+ hi = gpr >> 32;
+ lo = gpr & 0xffffffff;
+#else
+ lo = gpr >> 32;
+ hi = gpr & 0xffffffff;
+#endif
+
+ di = 2 - vcpu->arch.mmio_vmx_copy_nums; /* doubleword index */
+ if (di > 1)
+ return;
+
+ if (vcpu->arch.mmio_host_swabbed)
+ di = 1 - di;
+
+ VCPU_VSX_VR(vcpu, index).u[di * 2] = hi;
+ VCPU_VSX_VR(vcpu, index).u[di * 2 + 1] = lo;
+}
+#endif /* CONFIG_ALTIVEC */
+
#ifdef CONFIG_PPC_FPU
static inline u64 sp_to_dp(u32 fprs)
{
@@ -1033,6 +1060,11 @@ static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
kvmppc_set_vsr_dword_dump(vcpu, gpr);
break;
#endif
+#ifdef CONFIG_ALTIVEC
+ case KVM_MMIO_REG_VMX:
+ kvmppc_set_vmx_dword(vcpu, gpr);
+ break;
+#endif
default:
BUG();
}
@@ -1308,6 +1340,111 @@ static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu,
}
#endif /* CONFIG_VSX */
+#ifdef CONFIG_ALTIVEC
+/* handle quadword load access in two halves */
+int kvmppc_handle_load128_by2x64(struct kvm_run *run, struct kvm_vcpu *vcpu,
+ unsigned int rt, int is_default_endian)
+{
+ enum emulation_result emulated;
+
+ while (vcpu->arch.mmio_vmx_copy_nums) {
+ emulated = __kvmppc_handle_load(run, vcpu, rt, 8,
+ is_default_endian, 0);
+
+ if (emulated != EMULATE_DONE)
+ break;
+
+ vcpu->arch.paddr_accessed += run->mmio.len;
+ vcpu->arch.mmio_vmx_copy_nums--;
+ }
+
+ return emulated;
+}
+
+static inline int kvmppc_get_vmx_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
+{
+ vector128 vrs = VCPU_VSX_VR(vcpu, rs);
+ u32 di;
+ u64 w0, w1;
+
+ di = 2 - vcpu->arch.mmio_vmx_copy_nums; /* doubleword index */
+ if (di > 1)
+ return -1;
+
+ if (vcpu->arch.mmio_host_swabbed)
+ di = 1 - di;
+
+ w0 = vrs.u[di * 2];
+ w1 = vrs.u[di * 2 + 1];
+
+#ifdef __BIG_ENDIAN
+ *val = (w0 << 32) | w1;
+#else
+ *val = (w1 << 32) | w0;
+#endif
+ return 0;
+}
+
+/* handle quadword store in two halves */
+int kvmppc_handle_store128_by2x64(struct kvm_run *run, struct kvm_vcpu *vcpu,
+ unsigned int rs, int is_default_endian)
+{
+ u64 val = 0;
+ enum emulation_result emulated = EMULATE_DONE;
+
+ vcpu->arch.io_gpr = rs;
+
+ while (vcpu->arch.mmio_vmx_copy_nums) {
+ if (kvmppc_get_vmx_data(vcpu, rs, &val) == -1)
+ return EMULATE_FAIL;
+
+ emulated = kvmppc_handle_store(run, vcpu, val, 8,
+ is_default_endian);
+ if (emulated != EMULATE_DONE)
+ break;
+
+ vcpu->arch.paddr_accessed += run->mmio.len;
+ vcpu->arch.mmio_vmx_copy_nums--;
+ }
+
+ return emulated;
+}
+
+static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu,
+ struct kvm_run *run)
+{
+ enum emulation_result emulated = EMULATE_FAIL;
+ int r;
+
+ vcpu->arch.paddr_accessed += run->mmio.len;
+
+ if (!vcpu->mmio_is_write) {
+ emulated = kvmppc_handle_load128_by2x64(run, vcpu,
+ vcpu->arch.io_gpr, 1);
+ } else {
+ emulated = kvmppc_handle_store128_by2x64(run, vcpu,
+ vcpu->arch.io_gpr, 1);
+ }
+
+ switch (emulated) {
+ case EMULATE_DO_MMIO:
+ run->exit_reason = KVM_EXIT_MMIO;
+ r = RESUME_HOST;
+ break;
+ case EMULATE_FAIL:
+ pr_info("KVM: MMIO emulation failed (VMX repeat)\n");
+ run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
+ run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
+ r = RESUME_HOST;
+ break;
+ default:
+ r = RESUME_GUEST;
+ break;
+ }
+ return r;
+}
+#endif /* CONFIG_ALTIVEC */
+
int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
{
int r = 0;
@@ -1429,6 +1566,18 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
}
}
#endif
+#ifdef CONFIG_ALTIVEC
+ if (vcpu->arch.mmio_vmx_copy_nums > 0)
+ vcpu->arch.mmio_vmx_copy_nums--;
+
+ if (vcpu->arch.mmio_vmx_copy_nums > 0) {
+ r = kvmppc_emulate_mmio_vmx_loadstore(vcpu, run);
+ if (r == RESUME_HOST) {
+ vcpu->mmio_needed = 1;
+ goto out;
+ }
+ }
+#endif
} else if (vcpu->arch.osi_needed) {
u64 *gprs = run->osi.gprs;
int i;

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