[PATCH] KVM: PPC: drop duplicate tracepoint
Commit 29577fc00ba4 (KVM: PPC: HV: Remove generic instruction emulation) caused a build failure: arch/powerpc/kvm/kvm-pr.o:(__tracepoints+0xa8): multiple definition of `__tracepoint_kvm_ppc_instr' arch/powerpc/kvm/kvm.o:(__tracepoints+0x1c0): first defined here due to a duplicate definition of the tracepoint in trace.h and trace_pr.h. Because the tracepoint is still used by Book3S HV code, and because the PR code does include trace.h, just remove the duplicate definition from trace_pr.h, and export it from kvm.o. Reported-by: Stephen Rothwell s...@canb.auug.org.au Signed-off-by: Paolo Bonzini pbonz...@redhat.com --- arch/powerpc/kvm/emulate.c | 2 ++ arch/powerpc/kvm/trace_pr.h | 20 2 files changed, 2 insertions(+), 20 deletions(-) diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c index e96b50d0bdab..2325168ad1ff 100644 --- a/arch/powerpc/kvm/emulate.c +++ b/arch/powerpc/kvm/emulate.c @@ -300,3 +300,5 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu) return emulated; } EXPORT_SYMBOL_GPL(kvmppc_emulate_instruction); + +EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr); diff --git a/arch/powerpc/kvm/trace_pr.h b/arch/powerpc/kvm/trace_pr.h index a674f090dfb8..e1357cd8dc1f 100644 --- a/arch/powerpc/kvm/trace_pr.h +++ b/arch/powerpc/kvm/trace_pr.h @@ -291,26 +291,6 @@ TRACE_EVENT(kvm_unmap_hva, TP_printk(unmap hva 0x%lx\n, __entry-hva) ); -TRACE_EVENT(kvm_ppc_instr, - TP_PROTO(unsigned int inst, unsigned long _pc, unsigned int emulate), - TP_ARGS(inst, _pc, emulate), - - TP_STRUCT__entry( - __field(unsigned int, inst) - __field(unsigned long, pc ) - __field(unsigned int, emulate ) - ), - - TP_fast_assign( - __entry-inst = inst; - __entry-pc = _pc; - __entry-emulate= emulate; - ), - - TP_printk(inst %u pc 0x%lx emulate %u\n, - __entry-inst, __entry-pc, __entry-emulate) -); - #endif /* _TRACE_KVM_H */ /* This part must be outside protection */ -- 1.8.3.1 -- To unsubscribe from this list: send the line unsubscribe kvm-ppc in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH v3 0/5] KVM: PPC: Book3e: AltiVec support
Add KVM Book3e AltiVec support and enable e6500 core. Changes: v3: - use distinct SPE/AltiVec exception handlers - make ONE_REG AltiVec support powerpc generic - add ONE_REG IVORs support v2: - integrate Paul's FP/VMX/VSX changes that landed in kvm-ppc-queue in January and take into account feedback Mihai Caraman (5): KVM: PPC: Book3e: Increase FPU laziness KVM: PPC: Book3e: Add AltiVec support KVM: PPC: Move ONE_REG AltiVec support to powerpc KVM: PPC: Booke: Add ONE_REG IVORs support KVM: PPC: Book3e: Enable e6500 core arch/powerpc/include/uapi/asm/kvm.h | 29 +++ arch/powerpc/kvm/book3s.c | 151 +--- arch/powerpc/kvm/booke.c | 331 -- arch/powerpc/kvm/booke.h | 39 +--- arch/powerpc/kvm/bookehv_interrupts.S | 10 +- arch/powerpc/kvm/e500.c | 42 - arch/powerpc/kvm/e500_emulate.c | 18 ++ arch/powerpc/kvm/e500mc.c | 44 - arch/powerpc/kvm/powerpc.c| 97 ++ 9 files changed, 554 insertions(+), 207 deletions(-) -- 1.7.11.7 -- To unsubscribe from this list: send the line unsubscribe kvm-ppc in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH v3 2/5] KVM: PPC: Book3e: Add AltiVec support
Add KVM Book3e AltiVec support. KVM Book3e FPU support gracefully reuse host
infrastructure so follow the same approach for AltiVec.
Keep SPE/AltiVec exception handlers distinct using CONFIG_KVM_E500V2.
Signed-off-by: Mihai Caraman mihai.cara...@freescale.com
---
v3:
- use distinct SPE/AltiVec exception handlers
v2:
- integrate Paul's FP/VMX/VSX changes
arch/powerpc/kvm/booke.c | 73 +++
arch/powerpc/kvm/booke.h | 5 +++
arch/powerpc/kvm/bookehv_interrupts.S | 10 +++--
arch/powerpc/kvm/e500_emulate.c | 18 +
4 files changed, 102 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 0c6f616..c5cca09 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -168,6 +168,40 @@ static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu)
#endif
}
+/*
+ * Simulate AltiVec unavailable fault to load guest state
+ * from thread to AltiVec unit.
+ * It requires to be called with preemption disabled.
+ */
+static inline void kvmppc_load_guest_altivec(struct kvm_vcpu *vcpu)
+{
+#ifdef CONFIG_ALTIVEC
+ if (cpu_has_feature(CPU_FTR_ALTIVEC)) {
+ if (!(current-thread.regs-msr MSR_VEC)) {
+ enable_kernel_altivec();
+ load_vr_state(vcpu-arch.vr);
+ current-thread.vr_save_area = vcpu-arch.vr;
+ current-thread.regs-msr |= MSR_VEC;
+ }
+ }
+#endif
+}
+
+/*
+ * Save guest vcpu AltiVec state into thread.
+ * It requires to be called with preemption disabled.
+ */
+static inline void kvmppc_save_guest_altivec(struct kvm_vcpu *vcpu)
+{
+#ifdef CONFIG_ALTIVEC
+ if (cpu_has_feature(CPU_FTR_ALTIVEC)) {
+ if (current-thread.regs-msr MSR_VEC)
+ giveup_altivec(current);
+ current-thread.vr_save_area = NULL;
+ }
+#endif
+}
+
static void kvmppc_vcpu_sync_debug(struct kvm_vcpu *vcpu)
{
/* Synchronize guest's desire to get debug interrupts into shadow MSR */
@@ -375,9 +409,14 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu
*vcpu,
case BOOKE_IRQPRIO_ITLB_MISS:
case BOOKE_IRQPRIO_SYSCALL:
case BOOKE_IRQPRIO_FP_UNAVAIL:
+#ifdef CONFIG_KVM_E500V2
case BOOKE_IRQPRIO_SPE_UNAVAIL:
case BOOKE_IRQPRIO_SPE_FP_DATA:
case BOOKE_IRQPRIO_SPE_FP_ROUND:
+#else
+ case BOOKE_IRQPRIO_ALTIVEC_UNAVAIL:
+ case BOOKE_IRQPRIO_ALTIVEC_ASSIST:
+#endif
case BOOKE_IRQPRIO_AP_UNAVAIL:
allowed = 1;
msr_mask = MSR_CE | MSR_ME | MSR_DE;
@@ -693,6 +732,17 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct
kvm_vcpu *vcpu)
kvmppc_load_guest_fp(vcpu);
#endif
+#ifdef CONFIG_ALTIVEC
+ /* Save userspace AltiVec state in stack */
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ enable_kernel_altivec();
+ /*
+* Since we can't trap on MSR_VEC in GS-mode, we consider the guest
+* as always using the AltiVec.
+*/
+ kvmppc_load_guest_altivec(vcpu);
+#endif
+
/* Switch to guest debug context */
debug = vcpu-arch.shadow_dbg_reg;
switch_booke_debug_regs(debug);
@@ -715,6 +765,10 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct
kvm_vcpu *vcpu)
kvmppc_save_guest_fp(vcpu);
#endif
+#ifdef CONFIG_ALTIVEC
+ kvmppc_save_guest_altivec(vcpu);
+#endif
+
out:
vcpu-mode = OUTSIDE_GUEST_MODE;
return ret;
@@ -999,6 +1053,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct
kvm_vcpu *vcpu,
r = RESUME_GUEST;
break;
+#ifdef CONFIG_KVM_E500V2
#ifdef CONFIG_SPE
case BOOKE_INTERRUPT_SPE_UNAVAIL: {
if (vcpu-arch.shared-msr MSR_SPE)
@@ -1040,7 +1095,24 @@ int kvmppc_handle_exit(struct kvm_run *run, struct
kvm_vcpu *vcpu,
run-hw.hardware_exit_reason = exit_nr;
r = RESUME_HOST;
break;
+#endif /* !CONFIG_SPE */
+#else
+/*
+ * On cores with Vector category, KVM is loaded only if CONFIG_ALTIVEC,
+ * see kvmppc_core_check_processor_compat().
+ */
+#ifdef CONFIG_ALTIVEC
+ case BOOKE_INTERRUPT_ALTIVEC_UNAVAIL:
+ kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL);
+ r = RESUME_GUEST;
+ break;
+
+ case BOOKE_INTERRUPT_ALTIVEC_ASSIST:
+ kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_ASSIST);
+ r = RESUME_GUEST;
+ break;
#endif
+#endif /* !CONFIG_KVM_E500V2 */
case BOOKE_INTERRUPT_DATA_STORAGE:
kvmppc_core_queue_data_storage(vcpu, vcpu-arch.fault_dear,
@@ -1217,6 +1289,7 @@ out:
/* interrupts now hard-disabled */
kvmppc_fix_ee_before_entry();
kvmppc_load_guest_fp(vcpu);
+
[PATCH v3 3/5] KVM: PPC: Move ONE_REG AltiVec support to powerpc
Make ONE_REG AltiVec support common across server and embedded implementations
moving kvm_vcpu_ioctl_get_one_reg() and kvm_vcpu_ioctl_set_one_reg() functions
to powerpc layer.
Signed-off-by: Mihai Caraman mihai.cara...@freescale.com
---
v3:
- make ONE_REG AltiVec support powerpc generic
v2:
- add comment describing VCSR register representation in KVM vs kernel
arch/powerpc/include/uapi/asm/kvm.h | 5 ++
arch/powerpc/kvm/book3s.c | 151 +++-
arch/powerpc/kvm/booke.c| 85
arch/powerpc/kvm/powerpc.c | 97 +++
4 files changed, 179 insertions(+), 159 deletions(-)
diff --git a/arch/powerpc/include/uapi/asm/kvm.h
b/arch/powerpc/include/uapi/asm/kvm.h
index e0e49db..7a27ff0 100644
--- a/arch/powerpc/include/uapi/asm/kvm.h
+++ b/arch/powerpc/include/uapi/asm/kvm.h
@@ -476,6 +476,11 @@ struct kvm_get_htab_header {
/* FP and vector status/control registers */
#define KVM_REG_PPC_FPSCR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x80)
+/*
+ * VSCR register is documented as a 32-bit register in the ISA, but it can
+ * only be accesses via a vector register. Expose VSCR as a 32-bit register
+ * even though the kernel represents it as a 128-bit vector.
+ */
#define KVM_REG_PPC_VSCR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x81)
/* Virtual processor areas */
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index dd03f6b..1b5adda 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -535,174 +535,111 @@ int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu,
struct kvm_fpu *fpu)
return -ENOTSUPP;
}
-int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
+int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
+ union kvmppc_one_reg *val)
{
- int r;
- union kvmppc_one_reg val;
- int size;
+ int r = 0;
long int i;
- size = one_reg_size(reg-id);
- if (size sizeof(val))
- return -EINVAL;
-
- r = vcpu-kvm-arch.kvm_ops-get_one_reg(vcpu, reg-id, val);
+ r = vcpu-kvm-arch.kvm_ops-get_one_reg(vcpu, id, val);
if (r == -EINVAL) {
r = 0;
- switch (reg-id) {
+ switch (id) {
case KVM_REG_PPC_DAR:
- val = get_reg_val(reg-id, kvmppc_get_dar(vcpu));
+ *val = get_reg_val(id, kvmppc_get_dar(vcpu));
break;
case KVM_REG_PPC_DSISR:
- val = get_reg_val(reg-id, kvmppc_get_dsisr(vcpu));
+ *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
break;
case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
- i = reg-id - KVM_REG_PPC_FPR0;
- val = get_reg_val(reg-id, VCPU_FPR(vcpu, i));
+ i = id - KVM_REG_PPC_FPR0;
+ *val = get_reg_val(id, VCPU_FPR(vcpu, i));
break;
case KVM_REG_PPC_FPSCR:
- val = get_reg_val(reg-id, vcpu-arch.fp.fpscr);
- break;
-#ifdef CONFIG_ALTIVEC
- case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
- if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
- r = -ENXIO;
- break;
- }
- val.vval = vcpu-arch.vr.vr[reg-id - KVM_REG_PPC_VR0];
+ *val = get_reg_val(id, vcpu-arch.fp.fpscr);
break;
- case KVM_REG_PPC_VSCR:
- if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
- r = -ENXIO;
- break;
- }
- val = get_reg_val(reg-id, vcpu-arch.vr.vscr.u[3]);
- break;
- case KVM_REG_PPC_VRSAVE:
- val = get_reg_val(reg-id, vcpu-arch.vrsave);
- break;
-#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_VSX
case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
if (cpu_has_feature(CPU_FTR_VSX)) {
- long int i = reg-id - KVM_REG_PPC_VSR0;
- val.vsxval[0] = vcpu-arch.fp.fpr[i][0];
- val.vsxval[1] = vcpu-arch.fp.fpr[i][1];
+ i = id - KVM_REG_PPC_VSR0;
+ val-vsxval[0] = vcpu-arch.fp.fpr[i][0];
+ val-vsxval[1] = vcpu-arch.fp.fpr[i][1];
} else {
r = -ENXIO;
}
break;
#endif /* CONFIG_VSX */
- case KVM_REG_PPC_DEBUG_INST: {
- u32 opcode = INS_TW;
- r =
[PATCH v3 5/5] KVM: PPC: Book3E: Enable e6500 core
Now that AltiVec support is in place enable e6500 core. Signed-off-by: Mihai Caraman mihai.cara...@freescale.com --- v2-v3: - no changes arch/powerpc/kvm/e500mc.c | 10 ++ 1 file changed, 10 insertions(+) diff --git a/arch/powerpc/kvm/e500mc.c b/arch/powerpc/kvm/e500mc.c index 19dd927..aa48dc3 100644 --- a/arch/powerpc/kvm/e500mc.c +++ b/arch/powerpc/kvm/e500mc.c @@ -177,6 +177,16 @@ int kvmppc_core_check_processor_compat(void) r = 0; else if (strcmp(cur_cpu_spec-cpu_name, e5500) == 0) r = 0; +#ifdef CONFIG_ALTIVEC + /* +* Since guests have the priviledge to enable AltiVec, we need AltiVec +* support in the host to save/restore their context. +* Don't use CPU_FTR_ALTIVEC to identify cores with AltiVec unit +* because it's cleared in the absence of CONFIG_ALTIVEC! +*/ + else if (strcmp(cur_cpu_spec-cpu_name, e6500) == 0) + r = 0; +#endif else r = -ENOTSUPP; -- 1.7.11.7 -- To unsubscribe from this list: send the line unsubscribe kvm-ppc in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH v3 4/5] KVM: PPC: Booke: Add ONE_REG IVORs support
Add ONE_REG IVORs support, with IVORs 0-15 and 35 booke common.
Signed-off-by: Mihai Caraman mihai.cara...@freescale.com
---
v3:
- new patch
arch/powerpc/include/uapi/asm/kvm.h | 24 +++
arch/powerpc/kvm/booke.c| 132
arch/powerpc/kvm/e500.c | 42 +++-
arch/powerpc/kvm/e500mc.c | 32 +
4 files changed, 228 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/uapi/asm/kvm.h
b/arch/powerpc/include/uapi/asm/kvm.h
index 7a27ff0..174fed0 100644
--- a/arch/powerpc/include/uapi/asm/kvm.h
+++ b/arch/powerpc/include/uapi/asm/kvm.h
@@ -563,6 +563,30 @@ struct kvm_get_htab_header {
#define KVM_REG_PPC_WORT (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xb9)
#define KVM_REG_PPC_SPRG9 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xba)
+/* Booke IVOR registers */
+#define KVM_REG_PPC_IVOR0 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xc0)
+#define KVM_REG_PPC_IVOR1 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xc1)
+#define KVM_REG_PPC_IVOR2 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xc2)
+#define KVM_REG_PPC_IVOR3 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xc3)
+#define KVM_REG_PPC_IVOR4 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xc4)
+#define KVM_REG_PPC_IVOR5 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xc5)
+#define KVM_REG_PPC_IVOR6 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xc6)
+#define KVM_REG_PPC_IVOR7 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xc7)
+#define KVM_REG_PPC_IVOR8 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xc8)
+#define KVM_REG_PPC_IVOR9 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xc9)
+#define KVM_REG_PPC_IVOR10 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xca)
+#define KVM_REG_PPC_IVOR11 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xcb)
+#define KVM_REG_PPC_IVOR12 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xcc)
+#define KVM_REG_PPC_IVOR13 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xcd)
+#define KVM_REG_PPC_IVOR14 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xce)
+#define KVM_REG_PPC_IVOR15 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xcf)
+#define KVM_REG_PPC_IVOR32 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xd0)
+#define KVM_REG_PPC_IVOR33 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xd1)
+#define KVM_REG_PPC_IVOR34 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xd2)
+#define KVM_REG_PPC_IVOR35 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xd3)
+#define KVM_REG_PPC_IVOR36 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xd4)
+#define KVM_REG_PPC_IVOR37 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xd5)
+
/* Transactional Memory checkpointed state:
* This is all GPRs, all VSX regs and a subset of SPRs
*/
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 4fe7f68..ffa82a5 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -1565,6 +1565,72 @@ int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
int r = 0;
switch (id) {
+ case KVM_REG_PPC_IVOR0:
+ *val = get_reg_val(id,
+ vcpu-arch.ivor[BOOKE_IRQPRIO_CRITICAL]);
+ break;
+ case KVM_REG_PPC_IVOR1:
+ *val = get_reg_val(id,
+ vcpu-arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK]);
+ break;
+ case KVM_REG_PPC_IVOR2:
+ *val = get_reg_val(id,
+ vcpu-arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]);
+ break;
+ case KVM_REG_PPC_IVOR3:
+ *val = get_reg_val(id,
+ vcpu-arch.ivor[BOOKE_IRQPRIO_INST_STORAGE]);
+ break;
+ case KVM_REG_PPC_IVOR4:
+ *val = get_reg_val(id,
+ vcpu-arch.ivor[BOOKE_IRQPRIO_EXTERNAL]);
+ break;
+ case KVM_REG_PPC_IVOR5:
+ *val = get_reg_val(id,
+ vcpu-arch.ivor[BOOKE_IRQPRIO_ALIGNMENT]);
+ break;
+ case KVM_REG_PPC_IVOR6:
+ *val = get_reg_val(id, vcpu-arch.ivor[BOOKE_IRQPRIO_PROGRAM]);
+ break;
+ case KVM_REG_PPC_IVOR7:
+ *val = get_reg_val(id,
+ vcpu-arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL]);
+ break;
+ case KVM_REG_PPC_IVOR8:
+ *val = get_reg_val(id,
+ vcpu-arch.ivor[BOOKE_IRQPRIO_CRITICAL]);
+ break;
+ case KVM_REG_PPC_IVOR9:
+ *val = get_reg_val(id,
+ vcpu-arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL]);
+ break;
+ case KVM_REG_PPC_IVOR10:
+ *val = get_reg_val(id,
+ vcpu-arch.ivor[BOOKE_IRQPRIO_DECREMENTER]);
+ break;
+ case KVM_REG_PPC_IVOR11:
+ *val = get_reg_val(id, vcpu-arch.ivor[BOOKE_IRQPRIO_FIT]);
+ break;
+ case KVM_REG_PPC_IVOR12:
+ *val = get_reg_val(id,
+ vcpu-arch.ivor[BOOKE_IRQPRIO_WATCHDOG]);
+ break;
+ case KVM_REG_PPC_IVOR13:
+
[PATCH v3 1/5] KVM: PPC: Book3e: Increase FPU laziness
Increase FPU laziness by calling kvmppc_load_guest_fp() just before
returning to guest instead of each sched in. Without this improvement
an interrupt may also claim floting point corrupting guest state.
Signed-off-by: Mihai Caraman mihai.cara...@freescale.com
---
v3:
- no changes
v2:
- remove fpu_active
- add descriptive comments
arch/powerpc/kvm/booke.c | 43 ---
arch/powerpc/kvm/booke.h | 34 --
arch/powerpc/kvm/e500mc.c | 2 --
3 files changed, 36 insertions(+), 43 deletions(-)
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index b4c89fa..0c6f616 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -124,6 +124,40 @@ static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
}
#endif
+/*
+ * Load up guest vcpu FP state if it's needed.
+ * It also set the MSR_FP in thread so that host know
+ * we're holding FPU, and then host can help to save
+ * guest vcpu FP state if other threads require to use FPU.
+ * This simulates an FP unavailable fault.
+ *
+ * It requires to be called with preemption disabled.
+ */
+static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu)
+{
+#ifdef CONFIG_PPC_FPU
+ if (!(current-thread.regs-msr MSR_FP)) {
+ enable_kernel_fp();
+ load_fp_state(vcpu-arch.fp);
+ current-thread.fp_save_area = vcpu-arch.fp;
+ current-thread.regs-msr |= MSR_FP;
+ }
+#endif
+}
+
+/*
+ * Save guest vcpu FP state into thread.
+ * It requires to be called with preemption disabled.
+ */
+static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu)
+{
+#ifdef CONFIG_PPC_FPU
+ if (current-thread.regs-msr MSR_FP)
+ giveup_fpu(current);
+ current-thread.fp_save_area = NULL;
+#endif
+}
+
static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu)
{
#if defined(CONFIG_PPC_FPU) !defined(CONFIG_KVM_BOOKE_HV)
@@ -654,12 +688,8 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct
kvm_vcpu *vcpu)
/*
* Since we can't trap on MSR_FP in GS-mode, we consider the guest
-* as always using the FPU. Kernel usage of FP (via
-* enable_kernel_fp()) in this thread must not occur while
-* vcpu-fpu_active is set.
+* as always using the FPU.
*/
- vcpu-fpu_active = 1;
-
kvmppc_load_guest_fp(vcpu);
#endif
@@ -683,8 +713,6 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct
kvm_vcpu *vcpu)
#ifdef CONFIG_PPC_FPU
kvmppc_save_guest_fp(vcpu);
-
- vcpu-fpu_active = 0;
#endif
out:
@@ -1188,6 +1216,7 @@ out:
else {
/* interrupts now hard-disabled */
kvmppc_fix_ee_before_entry();
+ kvmppc_load_guest_fp(vcpu);
}
}
diff --git a/arch/powerpc/kvm/booke.h b/arch/powerpc/kvm/booke.h
index f753543..e73d513 100644
--- a/arch/powerpc/kvm/booke.h
+++ b/arch/powerpc/kvm/booke.h
@@ -116,40 +116,6 @@ extern int kvmppc_core_emulate_mtspr_e500(struct kvm_vcpu
*vcpu, int sprn,
extern int kvmppc_core_emulate_mfspr_e500(struct kvm_vcpu *vcpu, int sprn,
ulong *spr_val);
-/*
- * Load up guest vcpu FP state if it's needed.
- * It also set the MSR_FP in thread so that host know
- * we're holding FPU, and then host can help to save
- * guest vcpu FP state if other threads require to use FPU.
- * This simulates an FP unavailable fault.
- *
- * It requires to be called with preemption disabled.
- */
-static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu)
-{
-#ifdef CONFIG_PPC_FPU
- if (vcpu-fpu_active !(current-thread.regs-msr MSR_FP)) {
- enable_kernel_fp();
- load_fp_state(vcpu-arch.fp);
- current-thread.fp_save_area = vcpu-arch.fp;
- current-thread.regs-msr |= MSR_FP;
- }
-#endif
-}
-
-/*
- * Save guest vcpu FP state into thread.
- * It requires to be called with preemption disabled.
- */
-static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu)
-{
-#ifdef CONFIG_PPC_FPU
- if (vcpu-fpu_active (current-thread.regs-msr MSR_FP))
- giveup_fpu(current);
- current-thread.fp_save_area = NULL;
-#endif
-}
-
static inline void kvmppc_clear_dbsr(void)
{
mtspr(SPRN_DBSR, mfspr(SPRN_DBSR));
diff --git a/arch/powerpc/kvm/e500mc.c b/arch/powerpc/kvm/e500mc.c
index 164bad2..67c06eb 100644
--- a/arch/powerpc/kvm/e500mc.c
+++ b/arch/powerpc/kvm/e500mc.c
@@ -145,8 +145,6 @@ static void kvmppc_core_vcpu_load_e500mc(struct kvm_vcpu
*vcpu, int cpu)
kvmppc_e500_tlbil_all(vcpu_e500);
__get_cpu_var(last_vcpu_of_lpid)[vcpu-kvm-arch.lpid] = vcpu;
}
-
- kvmppc_load_guest_fp(vcpu);
}
static void kvmppc_core_vcpu_put_e500mc(struct kvm_vcpu *vcpu)
--
1.7.11.7
--
To unsubscribe from this list: send the line unsubscribe kvm-ppc in
the body of
Re: [PATCH 0/6] IRQFD without IRQ routing, enabled for XICS
Il 30/06/2014 12:51, Paul Mackerras ha scritto: This series of patches provides a way to implement IRQFD support without having to implement IRQ routing, and adds IRQFD support for the XICS interrupt controller emulation. (XICS is the interrupt controller defined for the pSeries machine type, used on IBM POWER servers). The basic approach is to make it easy for code other than irqchip.c to provide a mapping from a global interrupt number (GSI) to an irq routing entry (struct kvm_kernel_irq_routing_entry). To make the lifetime of this routing entry easier to manage, we change the IRQFD code to keep a copy of the routing entry (for the MSI fast-path case) rather than a pointer to the routing entry. Since the copy can't be updated atomically, we add a seqcount_t to make sure that when reading it we get a copy that hasn't been half-way updated. Next we replace the hard-coded accesses outside irqchip.c to the fields of the kvm_irq_routing_table struct with calls to accessor functions in irqchip.c, namely kvm_irq_map_gsi() and kvm_irq_map_chip_pin(). That enables us to move all references to the kvm_irq_routing_table struct, and the definition of that struct, into irqchip.c. Then we move the irq notifier implementation from irqchip.c into eventfd.c and add a separate Kconfig option to enable IRQFD. With that we can enable IRQFD without irq routing, which we achieve by compiling in eventfd.c but not irqchip.c, and providing an alternative implementation of kvm_irq_map_gsi() and kvm_irq_map_chip_pin(). The last patch does that for XICS. With this series I can use vhost-net with KVM guests, and I see the TCP bandwidth between guest and host on a POWER8 machine go from around 700MB/s to over 2GB/s. I would like to see this go into 3.17. arch/ia64/kvm/Kconfig| 1 + arch/powerpc/kvm/Kconfig | 3 + arch/powerpc/kvm/book3s_hv_rm_xics.c | 5 ++ arch/powerpc/kvm/book3s_xics.c | 55 +++--- arch/powerpc/kvm/book3s_xics.h | 2 + arch/powerpc/kvm/mpic.c | 4 +- arch/s390/kvm/Kconfig| 1 + arch/s390/kvm/interrupt.c| 3 +- arch/x86/kvm/Kconfig | 1 + include/linux/kvm_host.h | 43 --- virt/kvm/Kconfig | 3 + virt/kvm/eventfd.c | 134 ++- virt/kvm/irq_comm.c | 24 +++ virt/kvm/irqchip.c | 98 ++--- virt/kvm/kvm_main.c | 2 +- 15 files changed, 227 insertions(+), 152 deletions(-) Applied for 3.17, thanks Eric and Cornelia for testing. Paolo -- To unsubscribe from this list: send the line unsubscribe kvm-ppc in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH] KVM: PPC: drop duplicate tracepoint
Il 05/08/2014 12:35, Paolo Bonzini ha scritto:
diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c
index e96b50d0bdab..2325168ad1ff 100644
--- a/arch/powerpc/kvm/emulate.c
+++ b/arch/powerpc/kvm/emulate.c
@@ -300,3 +300,5 @@ int kvmppc_emulate_instruction(struct kvm_run *run,
struct kvm_vcpu *vcpu)
return emulated;
}
EXPORT_SYMBOL_GPL(kvmppc_emulate_instruction);
+
+EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);
Nope, this is in kvm-pr.ko so it is not enough... replaced with
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 288b4bb05cbd..4c79284b58be 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -1347,3 +1347,5 @@ void kvm_arch_exit(void)
{
}
+
+EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);
Paolo
--
To unsubscribe from this list: send the line unsubscribe kvm-ppc in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH 5/5 v2] KVM: PPC: BOOKE: Emulate debug registers and exception
On Mon, 2014-08-04 at 22:41 -0500, Bhushan Bharat-R65777 wrote:
-Original Message-
From: Wood Scott-B07421
Sent: Tuesday, August 05, 2014 4:23 AM
To: Bhushan Bharat-R65777
Cc: ag...@suse.de; kvm-ppc@vger.kernel.org; k...@vger.kernel.org; Yoder
Stuart-
B08248
Subject: Re: [PATCH 5/5 v2] KVM: PPC: BOOKE: Emulate debug registers and
exception
On Mon, 2014-08-04 at 13:32 +0530, Bharat Bhushan wrote:
@@ -735,7 +745,27 @@ static int kvmppc_handle_debug(struct kvm_run *run,
struct kvm_vcpu *vcpu)
struct debug_reg *dbg_reg = (vcpu-arch.shadow_dbg_reg);
u32 dbsr = vcpu-arch.dbsr;
- /* Clear guest dbsr (vcpu-arch.dbsr).
+ if (vcpu-guest_debug == 0) {
+ /*
+ * Debug resources belong to Guest.
+ * Imprecise debug event are not injected
+ */
+ if (dbsr DBSR_IDE)
+ return RESUME_GUEST;
This is incorrect. DBSR_IDE shouldn't *cause* an injection, but it
shouldn't
inhibit it either.
Will this work ?
If ((dbsr DBSR_IDE) !(dbsr ~DBSR_IDE))
Return RESUME_GUEST;
I suppose it could, but it would be cleaner to just change dbsr to
(dbsr ~DBSR_IDE) in the next if-statement (maybe factoring out each
term of that if-statement to variables to make it more readable).
@@ -828,6 +858,8 @@ static void kvmppc_restart_interrupt(struct kvm_vcpu
*vcpu,
case BOOKE_INTERRUPT_DEBUG:
/* Save DBSR before preemption is enabled */
vcpu-arch.dbsr = mfspr(SPRN_DBSR);
+ /* MASK out DBSR_MRR */
+ vcpu-arch.dbsr = ~DBSR_MRR;
kvmppc_clear_dbsr();
break;
}
DBSR[MRR] can only be set once per host system reset. There's no need to
filter
it out here; just make sure the host clears it at some point before this
point.
Can you please suggest where ? somewhere in KVM initialization ?
Sure, KVM init works given that there's no real reason for non-KVM code
to care.
The MRR value doesn't currently survive past kvmppc_clear_dbsr(), so this
isn't
helping to preserve it for the host's benefit...
@@ -1858,6 +1890,7 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct
kvm_vcpu *vcpu,
if (!(dbg-control KVM_GUESTDBG_ENABLE)) {
vcpu-arch.shadow_dbg_reg.dbcr0 = 0;
+ vcpu-arch.dbg_reg.dbcr0 = 0;
Again, it's not clear why we need shadow debug registers here. Just in
case we
implement something that can't be implemented isn't a good reason to keep
complexity around.
One reason was that setting EDM in guest visible register, For this we
need shadow_reg is used to save/restore state in h/w register (which
does not have DBCR0_EDM) but debug_reg have DBCR0_EDM.
If that's the only reason, then I'd get rid of the shadow and just OR in
DCBR0_EDM when reading the register, if vcpu-guest_debug is nonzero.
-Scott
--
To unsubscribe from this list: send the line unsubscribe kvm-ppc in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
