Samuel Holland 16d3b1af09 perf: RISC-V: Check standard event availability ... The RISC-V SBI PMU specification defines several standard hardware and cache events. Currently, all of these events are exposed to userspace, even when not actually implemented. They appear in the `perf list` output, and commands like `perf stat` try to use them. This is more than just a cosmetic issue, because the PMU driver's .add function fails for these events, which causes pmu_groups_sched_in() to prematurely stop scheduling in other (possibly valid) hardware events. Add logic to check which events are supported by the hardware (i.e. can be mapped to some counter), so only usable events are reported to userspace. Since the kernel does not know the mapping between events and possible counters, this check must happen during boot, when no counters are in use. Make the check asynchronous to minimize impact on boot time. Fixes: e999143459 ("RISC-V: Add perf platform driver based on SBI PMU extension") Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Atish Patra <atishp@rivosinc.com> Tested-by: Atish Patra <atishp@rivosinc.com> Signed-off-by: Atish Patra <atishp@rivosinc.com> Link: https://lore.kernel.org/r/20240628-misc_perf_fixes-v4-3-e01cfddcf035@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2024-07-03 12:56:22 -07:00
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aia_aplic.c	RISC-V: KVM: Fix APLIC in_clrip[x] read emulation	2024-03-26 09:40:55 +05:30
aia_device.c	RISC-V: KVM: Remove unneeded semicolon	2023-06-20 10:48:38 +05:30
aia_imsic.c	RISCV: KVM: update external interrupt atomically for IMSIC swfile	2023-12-13 11:59:52 +05:30
aia.c	RISC-V: KVM: Add perf sampling support for guests	2024-04-26 13:13:50 +05:30
Kconfig	kvm: replace __KVM_HAVE_READONLY_MEM with Kconfig symbol	2024-02-08 08:41:06 -05:00
main.c	RISC-V: KVM: Implement kvm_arch_vcpu_ioctl_set_guest_debug()	2024-04-08 14:06:27 +05:30
Makefile	kbuild: use $(src) instead of $(srctree)/$(src) for source directory	2024-05-10 04:34:52 +09:00
mmu.c	KVM: delete .change_pte MMU notifier callback	2024-04-11 13:18:27 -04:00
tlb.c	riscv: Rearrange hwcap.h and cpufeature.h	2023-11-09 10:15:51 -08:00
vcpu_exit.c	RISC-V: KVM: Handle breakpoint exits for VCPU	2024-04-08 14:06:27 +05:30
vcpu_fp.c	riscv: Rearrange hwcap.h and cpufeature.h	2023-11-09 10:15:51 -08:00
vcpu_insn.c	RISC-V: KVM: Forward SEED CSR access to user space	2024-03-06 20:53:32 +05:30
vcpu_onereg.c	RISC-V: KVM: Add perf sampling support for guests	2024-04-26 13:13:50 +05:30
vcpu_pmu.c	perf: RISC-V: Check standard event availability	2024-07-03 12:56:22 -07:00
vcpu_sbi_base.c	RISC-V: KVM: Add ONE_REG interface to enable/disable SBI extensions	2023-04-21 17:38:44 +05:30
vcpu_sbi_hsm.c	RISCV: KVM: Introduce vcpu->reset_cntx_lock	2024-04-22 10:39:03 +05:30
vcpu_sbi_pmu.c	RISC-V: KVM: Improve firmware counter read function	2024-04-26 13:13:54 +05:30
vcpu_sbi_replace.c	RISC-V: KVM: Make SBI uapi consistent with ISA uapi	2023-12-29 12:31:44 +05:30
vcpu_sbi_sta.c	RISC-V: KVM: Rename the SBI_STA_SHMEM_DISABLE to a generic name	2024-04-22 11:13:52 +05:30
vcpu_sbi_v01.c	RISC-V: KVM: Modify SBI extension handler to return SBI error code	2023-02-07 20:35:45 +05:30
vcpu_sbi.c	RISCV: KVM: Introduce mp_state_lock to avoid lock inversion	2024-04-22 10:37:11 +05:30
vcpu_switch.S	riscv: kvm: use ".L" local labels in assembly when applicable	2023-12-29 12:31:33 +05:30
vcpu_timer.c	RISC-V: KVM: do not EOPNOTSUPP in set KVM_REG_RISCV_TIMER_REG	2023-08-08 17:25:49 +05:30
vcpu_vector.c	RISC-V: KVM: add 'vlenb' Vector CSR	2023-12-29 12:31:54 +05:30
vcpu.c	RISC-V: KVM: Add perf sampling support for guests	2024-04-26 13:13:50 +05:30
vm.c	RISC-V: KVM: Implement kvm_arch_vcpu_ioctl_set_guest_debug()	2024-04-08 14:06:27 +05:30
vmid.c	RISC-V: KVM: Drop the _MASK suffix from hgatp.VMID mask defines	2023-04-21 17:45:44 +05:30