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From:   Inochi Amaoto <inochiama@outlook.com>
To:     Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
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        Adrian Hunter <adrian.hunter@intel.com>,
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        Palmer Dabbelt <palmer@dabbelt.com>,
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Cc:     linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
        linux-riscv@lists.infradead.org,
        Inochi Amaoto <inochiama@outlook.com>
Subject: [PATCH 1/2] perf tools riscv: Allow get_cpuid return empty MARCH and MIMP
Date:   Tue, 16 May 2023 10:37:13 +0800
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The T-HEAD C9xx series CPU only has MVENDOR defined, and left MARCH
and MIMP unimplemented.

To make perf support T-HEAD C9xx events. remove the restriction of
the MARCH and MIMP.

Signed-off-by: Inochi Amaoto <inochiama@outlook.com>
---
 tools/perf/arch/riscv/util/header.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/tools/perf/arch/riscv/util/header.c b/tools/perf/arch/riscv/util/header.c
index 4a41856938a8..031899c627f6 100644
--- a/tools/perf/arch/riscv/util/header.c
+++ b/tools/perf/arch/riscv/util/header.c
@@ -55,18 +55,13 @@ static char *_get_cpuid(void)
 				goto free;
 		} else if (!strncmp(line, CPUINFO_MARCH, strlen(CPUINFO_MARCH))) {
 			marchid = _get_field(line);
-			if (!marchid)
-				goto free;
 		} else if (!strncmp(line, CPUINFO_MIMP, strlen(CPUINFO_MIMP))) {
 			mimpid = _get_field(line);
-			if (!mimpid)
-				goto free;
-
 			break;
 		}
 	}
 
-	if (!mvendorid || !marchid || !mimpid)
+	if (!mvendorid)
 		goto free;
 
 	if (asprintf(&cpuid, "%s-%s-%s", mvendorid, marchid, mimpid) < 0)
-- 
2.40.1