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-rw-r--r--arch/powerpc/include/asm/kvm_host.h12
-rw-r--r--arch/powerpc/kvm/Kconfig9
-rw-r--r--arch/powerpc/kvm/book3s_hv.c23
-rw-r--r--arch/powerpc/kvm/book3s_hv_p9_entry.c14
4 files changed, 34 insertions, 24 deletions
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index a0f44762a069..eeba679802cf 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -831,11 +831,13 @@ struct kvm_vcpu_arch {
struct kvmhv_tb_accumulator *cur_activity; /* What we're timing */
u64 cur_tb_start; /* when it started */
#ifdef CONFIG_KVM_BOOK3S_HV_P9_TIMING
- struct kvmhv_tb_accumulator rm_entry; /* real-mode entry code */
- struct kvmhv_tb_accumulator rm_intr; /* real-mode intr handling */
- struct kvmhv_tb_accumulator rm_exit; /* real-mode exit code */
- struct kvmhv_tb_accumulator guest_time; /* guest execution */
- struct kvmhv_tb_accumulator cede_time; /* time napping inside guest */
+ struct kvmhv_tb_accumulator vcpu_entry;
+ struct kvmhv_tb_accumulator vcpu_exit;
+ struct kvmhv_tb_accumulator in_guest;
+ struct kvmhv_tb_accumulator hcall;
+ struct kvmhv_tb_accumulator pg_fault;
+ struct kvmhv_tb_accumulator guest_entry;
+ struct kvmhv_tb_accumulator guest_exit;
#else
struct kvmhv_tb_accumulator rm_entry; /* real-mode entry code */
struct kvmhv_tb_accumulator rm_intr; /* real-mode intr handling */
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index 191347f44731..cedf1e0f50e1 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -135,10 +135,11 @@ config KVM_BOOK3S_HV_P9_TIMING
select KVM_BOOK3S_HV_EXIT_TIMING
depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS
help
- Calculate time taken for each vcpu in various parts of the
- code. The total, minimum and maximum times in nanoseconds
- together with the number of executions are reported in debugfs in
- kvm/vm#/vcpu#/timings.
+ Calculate time taken for each vcpu during vcpu entry and
+ exit, time spent inside the guest and time spent handling
+ hypercalls and page faults. The total, minimum and maximum
+ times in nanoseconds together with the number of executions
+ are reported in debugfs in kvm/vm#/vcpu#/timings.
If unsure, say N.
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 108ee563f72a..c68883170a82 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -2661,11 +2661,13 @@ static struct debugfs_timings_element {
size_t offset;
} timings[] = {
#ifdef CONFIG_KVM_BOOK3S_HV_P9_TIMING
- {"rm_entry", offsetof(struct kvm_vcpu, arch.rm_entry)},
- {"rm_intr", offsetof(struct kvm_vcpu, arch.rm_intr)},
- {"rm_exit", offsetof(struct kvm_vcpu, arch.rm_exit)},
- {"guest", offsetof(struct kvm_vcpu, arch.guest_time)},
- {"cede", offsetof(struct kvm_vcpu, arch.cede_time)},
+ {"vcpu_entry", offsetof(struct kvm_vcpu, arch.vcpu_entry)},
+ {"guest_entry", offsetof(struct kvm_vcpu, arch.guest_entry)},
+ {"in_guest", offsetof(struct kvm_vcpu, arch.in_guest)},
+ {"guest_exit", offsetof(struct kvm_vcpu, arch.guest_exit)},
+ {"vcpu_exit", offsetof(struct kvm_vcpu, arch.vcpu_exit)},
+ {"hypercall", offsetof(struct kvm_vcpu, arch.hcall)},
+ {"page_fault", offsetof(struct kvm_vcpu, arch.pg_fault)},
#else
{"rm_entry", offsetof(struct kvm_vcpu, arch.rm_entry)},
{"rm_intr", offsetof(struct kvm_vcpu, arch.rm_intr)},
@@ -4014,8 +4016,10 @@ static int kvmhv_vcpu_entry_p9_nested(struct kvm_vcpu *vcpu, u64 time_limit, uns
mtspr(SPRN_DAR, vcpu->arch.shregs.dar);
mtspr(SPRN_DSISR, vcpu->arch.shregs.dsisr);
switch_pmu_to_guest(vcpu, &host_os_sprs);
+ accumulate_time(vcpu, &vcpu->arch.in_guest);
trap = plpar_hcall_norets(H_ENTER_NESTED, __pa(&hvregs),
__pa(&vcpu->arch.regs));
+ accumulate_time(vcpu, &vcpu->arch.guest_exit);
kvmhv_restore_hv_return_state(vcpu, &hvregs);
switch_pmu_to_host(vcpu, &host_os_sprs);
vcpu->arch.shregs.msr = vcpu->arch.regs.msr;
@@ -4703,6 +4707,8 @@ static int kvmppc_vcpu_run_hv(struct kvm_vcpu *vcpu)
struct kvm *kvm;
unsigned long msr;
+ start_timing(vcpu, &vcpu->arch.vcpu_entry);
+
if (!vcpu->arch.sane) {
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
return -EINVAL;
@@ -4768,6 +4774,7 @@ static int kvmppc_vcpu_run_hv(struct kvm_vcpu *vcpu)
vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
do {
+ accumulate_time(vcpu, &vcpu->arch.guest_entry);
if (cpu_has_feature(CPU_FTR_ARCH_300))
r = kvmhv_run_single_vcpu(vcpu, ~(u64)0,
vcpu->arch.vcore->lpcr);
@@ -4775,6 +4782,8 @@ static int kvmppc_vcpu_run_hv(struct kvm_vcpu *vcpu)
r = kvmppc_run_vcpu(vcpu);
if (run->exit_reason == KVM_EXIT_PAPR_HCALL) {
+ accumulate_time(vcpu, &vcpu->arch.hcall);
+
if (WARN_ON_ONCE(vcpu->arch.shregs.msr & MSR_PR)) {
/*
* These should have been caught reflected
@@ -4790,6 +4799,7 @@ static int kvmppc_vcpu_run_hv(struct kvm_vcpu *vcpu)
trace_kvm_hcall_exit(vcpu, r);
kvmppc_core_prepare_to_enter(vcpu);
} else if (r == RESUME_PAGE_FAULT) {
+ accumulate_time(vcpu, &vcpu->arch.pg_fault);
srcu_idx = srcu_read_lock(&kvm->srcu);
r = kvmppc_book3s_hv_page_fault(vcpu,
vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
@@ -4801,12 +4811,15 @@ static int kvmppc_vcpu_run_hv(struct kvm_vcpu *vcpu)
r = kvmppc_xics_rm_complete(vcpu, 0);
}
} while (is_kvmppc_resume_guest(r));
+ accumulate_time(vcpu, &vcpu->arch.vcpu_exit);
vcpu->arch.state = KVMPPC_VCPU_NOTREADY;
atomic_dec(&kvm->arch.vcpus_running);
srr_regs_clobbered();
+ end_timing(vcpu);
+
return r;
}
diff --git a/arch/powerpc/kvm/book3s_hv_p9_entry.c b/arch/powerpc/kvm/book3s_hv_p9_entry.c
index 32e078db8da2..e740eca45862 100644
--- a/arch/powerpc/kvm/book3s_hv_p9_entry.c
+++ b/arch/powerpc/kvm/book3s_hv_p9_entry.c
@@ -779,8 +779,6 @@ int kvmhv_vcpu_entry_p9(struct kvm_vcpu *vcpu, u64 time_limit, unsigned long lpc
WARN_ON_ONCE(vcpu->arch.shregs.msr & MSR_HV);
WARN_ON_ONCE(!(vcpu->arch.shregs.msr & MSR_ME));
- start_timing(vcpu, &vcpu->arch.rm_entry);
-
vcpu->arch.ceded = 0;
/* Save MSR for restore, with EE clear. */
@@ -941,13 +939,13 @@ tm_return_to_guest:
mtspr(SPRN_SRR0, vcpu->arch.shregs.srr0);
mtspr(SPRN_SRR1, vcpu->arch.shregs.srr1);
- accumulate_time(vcpu, &vcpu->arch.guest_time);
-
switch_pmu_to_guest(vcpu, &host_os_sprs);
+ accumulate_time(vcpu, &vcpu->arch.in_guest);
+
kvmppc_p9_enter_guest(vcpu);
- switch_pmu_to_host(vcpu, &host_os_sprs);
- accumulate_time(vcpu, &vcpu->arch.rm_intr);
+ accumulate_time(vcpu, &vcpu->arch.guest_exit);
+ switch_pmu_to_host(vcpu, &host_os_sprs);
/* XXX: Could get these from r11/12 and paca exsave instead */
vcpu->arch.shregs.srr0 = mfspr(SPRN_SRR0);
@@ -1042,8 +1040,6 @@ tm_return_to_guest:
#endif
}
- accumulate_time(vcpu, &vcpu->arch.rm_exit);
-
/* Advance host PURR/SPURR by the amount used by guest */
purr = mfspr(SPRN_PURR);
spurr = mfspr(SPRN_SPURR);
@@ -1150,8 +1146,6 @@ tm_return_to_guest:
asm volatile(PPC_CP_ABORT);
out:
- end_timing(vcpu);
-
return trap;
}
EXPORT_SYMBOL_GPL(kvmhv_vcpu_entry_p9);
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-31 19:29:44 +0000