From 19135e372ff1627d2337f3014ee0bfe2e178d00a Mon Sep 17 00:00:00 2001 From: Andrew Turner Date: Thu, 1 Apr 2021 14:38:09 +0000 Subject: [PATCH] arm64: Fix finding the pmc event ID The lower pmc event bits were masked off to find the PMC event ID. The doesn't work when there are more events. Switch it to use the offser relative to the first event while also checking the ID is in the expected range. Reviewed by: gnn, ray Sponsored by: Innovate UK Differential Revision: https://reviews.freebsd.org/D29600 (cherry picked from commit 24b2f4ea49229618c5608846acfc10be2eb0d567) --- sys/dev/hwpmc/hwpmc_arm64.c | 4 +++- sys/dev/hwpmc/hwpmc_arm64.h | 1 - 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/sys/dev/hwpmc/hwpmc_arm64.c b/sys/dev/hwpmc/hwpmc_arm64.c index 49375219a48..050f861a74f 100644 --- a/sys/dev/hwpmc/hwpmc_arm64.c +++ b/sys/dev/hwpmc/hwpmc_arm64.c @@ -181,7 +181,9 @@ arm64_allocate_pmc(int cpu, int ri, struct pmc *pm, } pe = a->pm_ev; - config = (pe & EVENT_ID_MASK); + config = (uint32_t)pe - PMC_EV_ARMV8_FIRST; + if (config > (PMC_EV_ARMV8_LAST - PMC_EV_ARMV8_FIRST)) + return (EINVAL); pm->pm_md.pm_arm64.pm_arm64_evsel = config; PMCDBG2(MDP, ALL, 2, "arm64-allocate ri=%d -> config=0x%x", ri, config); diff --git a/sys/dev/hwpmc/hwpmc_arm64.h b/sys/dev/hwpmc/hwpmc_arm64.h index f0d43aa58ef..fb7637a39c6 100644 --- a/sys/dev/hwpmc/hwpmc_arm64.h +++ b/sys/dev/hwpmc/hwpmc_arm64.h @@ -40,7 +40,6 @@ #define ARMV8_RELOAD_COUNT_TO_PERFCTR_VALUE(R) (-(R)) #define ARMV8_PERFCTR_VALUE_TO_RELOAD_COUNT(P) (-(P)) -#define EVENT_ID_MASK 0xFF #ifdef _KERNEL /* MD extension for 'struct pmc' */