https://github.com/torvalds/linux
Revision 74a61d53a6d1ca1172d85964d15c83c2cc3670b3 authored by Jing Zhang on 26 September 2022, 13:03:16 UTC, committed by Arnaldo Carvalho de Melo on 28 September 2022, 14:26:33 UTC
When synthesizing event with SPE data source, commit 4e6430cbb1a9("perf arm-spe: Use SPE data source for neoverse cores") augment the type with source information by MIDR. However, is_midr_in_range only compares the first entry in neoverse_spe. Change is_midr_in_range to is_midr_in_range_list to traverse the neoverse_spe array so that all neoverse cores synthesize event with data source packet. Fixes: 4e6430cbb1a9f1dc ("perf arm-spe: Use SPE data source for neoverse cores") Reviewed-by: Ali Saidi <alisaidi@amazon.com> Reviewed-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ali Saidi <alisaidi@amazon.com> Cc: German Gomez <german.gomez@arm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.garry@huawei.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Shuai Xue <xueshuai@linux.alibaba.com> Cc: Timothy Hayes <timothy.hayes@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Zhuo Song <zhuo.song@linux.alibaba.com> Link: https://lore.kernel.org/r/1664197396-42672-1-git-send-email-renyu.zj@linux.alibaba.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1 parent 5064424
Tip revision: 74a61d53a6d1ca1172d85964d15c83c2cc3670b3 authored by Jing Zhang on 26 September 2022, 13:03:16 UTC
perf arm-spe: augment the data source type with neoverse_spe list
perf arm-spe: augment the data source type with neoverse_spe list
Tip revision: 74a61d5
devmem_is_allowed.c
// SPDX-License-Identifier: GPL-2.0-only
/*
* A generic version of devmem_is_allowed.
*
* Based on arch/arm64/mm/mmap.c
*
* Copyright (C) 2020 Google, Inc.
* Copyright (C) 2012 ARM Ltd.
*/
#include <linux/mm.h>
#include <linux/ioport.h>
/*
* devmem_is_allowed() checks to see if /dev/mem access to a certain address
* is valid. The argument is a physical page number. We mimic x86 here by
* disallowing access to system RAM as well as device-exclusive MMIO regions.
* This effectively disable read()/write() on /dev/mem.
*/
int devmem_is_allowed(unsigned long pfn)
{
if (iomem_is_exclusive(PFN_PHYS(pfn)))
return 0;
if (!page_is_ram(pfn))
return 1;
return 0;
}
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