SBI v3.0 specification[1] added two new improvements to the PMU chaper. The SBI v3.0 specification is frozen and under public review phase as per the RISC-V International guidelines. 1. Added an additional get_event_info function to query event availablity in bulk instead of individual SBI calls for each event. This helps in improving the boot time. 2. Raw event width allowed by the platform is widened to have 56 bits with RAW event v2 as per new clarification in the priv ISA[2]. Apart from implementing these new features, this series improves the gpa range check in KVM and updates the kvm SBI implementation to SBI v3.0. The opensbi patches have been merged. This series can be found at [3]. [1] https://github.com/riscv-non-isa/riscv-sbi-doc/releases/download/v3.0-rc7/riscv-sbi.pdf [2] https://github.com/riscv/riscv-isa-manual/issues/1578 [3] https://github.com/atishp04/linux/tree/b4/pmu_event_info_v4 Signed-off-by: Atish Patra <atishp@xxxxxxxxxxxx> --- Changes in v5: - Rebased on top of v6.17-rc3 - Updated PATCH 6 as per feedback to improve the generic helper function - Adapted PATCH 7 & 8 as per PATCH 6. - Link to v4: https://lore.kernel.org/r/20250721-pmu_event_info-v4-0-ac76758a4269@xxxxxxxxxxxx Changes in v4: - Rebased on top of v6.16-rc7 - Fixed a potential compilation issue in PATCH5. - Minor typos fixed PATCH2 and PATCH3. - Fixed variable ordering in PATCH6 - Link to v3: https://lore.kernel.org/r/20250522-pmu_event_info-v3-0-f7bba7fd9cfe@xxxxxxxxxxxx Changes in v3: - Rebased on top of v6.15-rc7 - Link to v2: https://lore.kernel.org/r/20250115-pmu_event_info-v2-0-84815b70383b@xxxxxxxxxxxx Changes in v2: - Dropped PATCH 2 to be taken during rcX. - Improved gpa range check validation by introducing a helper function and checking the entire range. - Link to v1: https://lore.kernel.org/r/20241119-pmu_event_info-v1-0-a4f9691421f8@xxxxxxxxxxxx --- Atish Patra (9): drivers/perf: riscv: Add SBI v3.0 flag drivers/perf: riscv: Add raw event v2 support RISC-V: KVM: Add support for Raw event v2 drivers/perf: riscv: Implement PMU event info function drivers/perf: riscv: Export PMU event info function KVM: Add a helper function to check if a gpa is in writable memselot RISC-V: KVM: Use the new gpa validate helper function RISC-V: KVM: Implement get event info function RISC-V: KVM: Upgrade the supported SBI version to 3.0 arch/riscv/include/asm/kvm_vcpu_pmu.h | 3 + arch/riscv/include/asm/kvm_vcpu_sbi.h | 2 +- arch/riscv/include/asm/sbi.h | 13 +++ arch/riscv/kvm/vcpu_pmu.c | 77 +++++++++++++- arch/riscv/kvm/vcpu_sbi_pmu.c | 3 + arch/riscv/kvm/vcpu_sbi_sta.c | 6 +- drivers/perf/riscv_pmu_sbi.c | 191 +++++++++++++++++++++++++--------- include/linux/kvm_host.h | 8 ++ include/linux/perf/riscv_pmu.h | 1 + 9 files changed, 245 insertions(+), 59 deletions(-) --- base-commit: e32a80927434907f973f38a88cd19d7e51991d24 change-id: 20241018-pmu_event_info-986e21ce6bd3 -- Regards, Atish patra
