Date: Wed, 28 May 2025 13:35:12 GMT From: Andrew Turner <andrew@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 1bf4adf8cc9a - main - hwpmc/arm64: Hard code the initial pmcr state Message-ID: <202505281335.54SDZCqN017827@gitrepo.freebsd.org>
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The branch main has been updated by andrew: URL: https://cgit.FreeBSD.org/src/commit/?id=1bf4adf8cc9a22a1bcb3eafaf0315b3175a65abe commit 1bf4adf8cc9a22a1bcb3eafaf0315b3175a65abe Author: Andrew Turner <andrew@FreeBSD.org> AuthorDate: 2025-05-27 19:55:44 +0000 Commit: Andrew Turner <andrew@FreeBSD.org> CommitDate: 2025-05-27 19:55:44 +0000 hwpmc/arm64: Hard code the initial pmcr state We can't the fields in PMCR_EL0 are configured in the way we expect. Rather than depending on prior configuration hard code the fields we want set. Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D50434 --- sys/dev/hwpmc/hwpmc_arm64.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/sys/dev/hwpmc/hwpmc_arm64.c b/sys/dev/hwpmc/hwpmc_arm64.c index 6b019bfcb419..310e43065716 100644 --- a/sys/dev/hwpmc/hwpmc_arm64.c +++ b/sys/dev/hwpmc/hwpmc_arm64.c @@ -501,9 +501,8 @@ arm64_pcpu_init(struct pmc_mdep *md, int cpu) WRITE_SPECIALREG(pmcntenclr_el0, 0xffffffff); WRITE_SPECIALREG(pmintenclr_el1, 0xffffffff); - /* Enable unit */ - pmcr = arm64_pmcr_read(); - pmcr |= PMCR_E; + /* Enable unit with a useful default state */ + pmcr = PMCR_LC | PMCR_C | PMCR_P | PMCR_E; if (arm64_64bit_events) pmcr |= PMCR_LP; arm64_pmcr_write(pmcr);
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