Re: [PATCH] kselftest/arm64: pac: Fix skipping of tests on systems without PAC

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On 8/20/21 4:25 PM, Mark Brown wrote:
On Fri, Aug 20, 2021 at 12:39:39PM +0530, Amit Kachhap wrote:
On 8/19/21 10:27 PM, Mark Brown wrote:

-	ASSERT_NE(0, hwcaps & HWCAP_PACA) TH_LOG("PAUTH not enabled"); \
+	if (!(hwcaps & HWCAP_PACA))					\
+		SKIP(return, "PAUTH not enabled"); \
   } while (0)
   #define ASSERT_GENERIC_PAUTH_ENABLED() \

May be ASSERT_GENERIC_PAUTH_ENABLED can be replaced with
something like VERIFY_GENERIC_PAUTH_ENABLED

I thought briefly about bikeshedding the name but didn't come up with
anything that was sufficiently better/clearer.

or can be modified like below and instead of failing it skips with a
message

   -	ASSERT_NE(0, hwcaps & HWCAP_PACA) TH_LOG("PAUTH not enabled"); \
   +	ASSERT_NE(0, hwcaps & HWCAP_PACA) SKIP(return, "PAUTH not enabled");

That's what the patch does?

Agree, I saw few other testcases where ASSERT is used along with SKIP.
(tools/testing/selftests/core/close_range_test.c) so this way ASSERT_GENERIC_* macro will be clear. There will be just an extra
log like "hwcaps & HWCAP_PACA = 0" in this case.

Probably your way is consistent as other tests in arm64 also just
skips due to HWCAP mismatch.





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