diff options
| author | Quan Zhou <zhouquan@iscas.ac.cn> | 2024-10-15 10:58:37 +0800 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2024-10-28 16:41:14 +0530 |
| commit | eded6754f398b5b4950e8f593f75fee63a8b49ad (patch) | |
| tree | e092b680fbb846ce3f4823e1c02a1fb20d1cccca /arch/riscv/include | |
| parent | 5bb5ccb3e8d8dba29941cd78d5c1bcd27b227b4a (diff) | |
riscv: KVM: add basic support for host vs guest profiling
For the information collected on the host side, we need to
identify which data originates from the guest and record
these events separately, this can be achieved by having
KVM register perf callbacks.
Signed-off-by: Quan Zhou <zhouquan@iscas.ac.cn>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Link: https://lore.kernel.org/r/00342d535311eb0629b9ba4f1e457a48e2abee33.1728957131.git.zhouquan@iscas.ac.cn
Signed-off-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/asm/kvm_host.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index 2e2254fd2a2a..35eab6e0f4ae 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -286,6 +286,16 @@ struct kvm_vcpu_arch { } sta; }; +/* + * Returns true if a Performance Monitoring Interrupt (PMI), a.k.a. perf event, + * arrived in guest context. For riscv, any event that arrives while a vCPU is + * loaded is considered to be "in guest". + */ +static inline bool kvm_arch_pmi_in_guest(struct kvm_vcpu *vcpu) +{ + return IS_ENABLED(CONFIG_GUEST_PERF_EVENTS) && !!vcpu; +} + static inline void kvm_arch_sync_events(struct kvm *kvm) {} #define KVM_RISCV_GSTAGE_TLB_MIN_ORDER 12 |