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Thu, 10 Sep 2026 21:49:24 -0700 (PDT) Received: from pve-server.rlab ([49.205.216.49]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-33ba4f1e434sm2883077eec.22.2026.09.10.21.49.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Sep 2026 21:49:24 -0700 (PDT) From: "Ritesh Harjani (IBM)" To: kvm@vger.kernel.org Cc: Sean Christopherson , Paolo Bonzini , Michael Ellerman , Christophe Leroy , Anushree Mathur , Venkat Rao Bagalkote , Harsh Prateek Bora , Claudio Imbrenda , Madhavan Srinivasan , Shrikanth Hegde , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, "Ritesh Harjani (IBM)" Subject: [PATCH v4 3/3] KVM: selftests: Don't limit LE dirty-bitmap bitops to s390x Date: Fri, 11 Sep 2026 10:18:54 +0530 Message-Id: <98cc49bb43ebc45c14cdfd596a4e64b07d2e1f08.1789097569.git.ritesh.list@gmail.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: References: X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit dirty_log_test already has BITOP_LE_SWIZZLE helpers, but they were compiled in only for s390x, so every other big-endian host used native test_bit(). The test fails on big-endian powerpc because it treated dirty host pages as clean (because of the endianness issue) w/o the fix the test fails with: Clear page 1 value (1) >= iteration (1) Fixes: a049a377164c ("KVM: selftests: Enable dirty_log_test on s390x") Signed-off-by: Ritesh Harjani (IBM) --- tools/testing/selftests/kvm/dirty_log_test.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c index af5eb0334a74..8189eaac713c 100644 --- a/tools/testing/selftests/kvm/dirty_log_test.c +++ b/tools/testing/selftests/kvm/dirty_log_test.c @@ -44,8 +44,11 @@ #define TEST_MIN_WRITES_PER_ITERATION 0x100 /* Dirty bitmaps are always little endian, so we need to swap on big endian */ -#if defined(__s390x__) +#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ # define BITOP_LE_SWIZZLE ((BITS_PER_LONG-1) & ~0x7) +#else +# define BITOP_LE_SWIZZLE 0 +#endif # define test_bit_le(nr, addr) \ test_bit((nr) ^ BITOP_LE_SWIZZLE, addr) # define __set_bit_le(nr, addr) \ @@ -56,13 +59,6 @@ __test_and_set_bit((nr) ^ BITOP_LE_SWIZZLE, addr) # define __test_and_clear_bit_le(nr, addr) \ __test_and_clear_bit((nr) ^ BITOP_LE_SWIZZLE, addr) -#else -# define test_bit_le test_bit -# define __set_bit_le __set_bit -# define __clear_bit_le __clear_bit -# define __test_and_set_bit_le __test_and_set_bit -# define __test_and_clear_bit_le __test_and_clear_bit -#endif #define TEST_DIRTY_RING_COUNT 65536 -- 2.39.5