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Peter Anvin" , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jonathan Corbet , Shuah Khan , Shuah Khan , Vishal Annapurve , Andrew Morton , Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Baoquan He , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Youngjun Park , Qi Zheng , Shakeel Butt , Kiryl Shutsemau , Jason Gunthorpe , Vlastimil Babka Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-coco@lists.linux.dev, Ackerley Tng X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1777418714; l=2851; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=7gz8kf/n4ixOaF8MVfsAM6UcG2xye98XFNb81uX9/Q0=; b=K0nhoHtw+bHDcFt0NTXB9H8IY5KufQrx9yXWXRDB44IJvZWG6vgqoP88UFkyWNZSvMMA4sjKx IeEHazMTIeLBYKybYfkuwhPvhexJMT5hxbaymArE73yb7zsZfD59Xn1 X-Developer-Key: i=ackerleytng@google.com; a=ed25519; pk=sAZDYXdm6Iz8FHitpHeFlCMXwabodTm7p8/3/8xUxuU= X-Endpoint-Received: by B4 Relay for ackerleytng@google.com/20260225 with auth_id=649 X-Original-From: Ackerley Tng Reply-To: ackerleytng@google.com X-Rspam-User: X-Rspamd-Queue-Id: 8F1B610000F X-Rspamd-Server: rspam06 X-Stat-Signature: resapg8dkc9bzo9inx4a8ybexzrap3ha X-HE-Tag: 1777418740-751120 X-HE-Meta: U2FsdGVkX19MIEHom+PELM0Uep4M9tqn4DWRFlHRB55MLmo7NukZQSREzxzjWQZS3Uy5Bf0HKmUWGEph6AhESShNZQ0CepvMkoQvGg+Pab9mN4Zs5isXFbvLTZ5+w0LeVHx64+mIQl9sR38o+7XX7lFdXaraenSzHkqV9K3x/pBtHr064ypqBTsnMVtRkpcI8jjUsZD8wjM22RhaM+k/Qu+GcJnVh2CH6lbWoiNvzB/hY5UAsWHovs8huUV+ab0GXvQj4oQUgrfQjUYXLzFkkxietvQETeBNwmNToIUEMlW/aI/Sc2xDdBU88AVgVhT2tcyK07W5xhjefmD9fWvrn4SA+W8PJwMWQfiDDBJPLzytXPBTxXjIrcoih895YuhJzmxxvvhf1CPl/svm6nC5sCTRSZcyqRWUsW+OH3sS1FoyJobBJ0Tnhe97AoFH8z3ruGKLhr0VllDjmiJz0UD21dfQAWUYegRmUz9ePGdbA/XOYi+Lwcf/qSPCnwvRbka284vU+IWgYvbfuA9VDTjBmbUUNRWpctdyGgQleTSYMHqWUehB92SOOxXUeHypyq7TE2UXJh7QN0UcpZRd6cRXorDs6xOYq5ddkptao1gIFmP60BrcfjnrY5/0NlfzrDB/E6m7SsHpz5W6vMB5jjgQp+pd87saKTlqbE6AbrGRF83WuAGWUDVKWk6Pc6MivEWtRHZ1pU7imKU9zNqTCJDG6xmjNqnk3CsgvaPc4Ow8BZ1lkATfwnH6wqNwaLjP/5jSDOz0skIxCYBwzE1JmjiORyYZL9ODOkCA14B8NATFjXQzr6a+1RAoONVc0xjDUWI0Snm2+npV31z0bRq9dn4fm6MNabR91Gez3iPPSjvTDJh0IeSi0wcZxO3uda17MVLMuwC8mIgoFUxDLQKXUjSxzavNTNnl8CXo3AV5LhAx5KXyj8xCE3KOTmzRP5M+N5Xhn1alNKdOKivLrIeWBLT e7lFVehj hgOODi9sPmiq9786yAV6/nWRVWdxMRMrUNl+0oR+52fTN7bhjjwmgmQSu3MCPgDBt0lRZTwFSeqGsBDrrOrDYUysEnAMJlwtmH+yU0GsxQPRvuAWSzbdEYhssSorm0oas9iGMahT2hVPOS4BvfPZnqCKFEuVexUWhPoP7NX5tmPjSePvut1/4+f7vNRHPrUty8Ncj7OcZZcAw+L1PvWypr7Pl1yqIPHf58Eyr9NnnmqSyehO7w4l6yY8Reu86FWlzhcQ+Gi2qvGc/pOC8KFnVNA5tFbah2WOqQl0IEN8ciHLrdaVIP9rr+qltdShJ/dJIr/ftZM53EShCO9Kip7QFn7V9ghYN9N7xka+fc3CbJctOMkrx3JJtNKny/iwEYAzH5pRf0PBEJqQjzW95WcxlPSt/q9Hin9SqpYzU Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Ackerley Tng Expand run_guest_do_rmw() to support checking that data at given pgoff is not equal to expected_val. This will be used in a later patch that tests that memory contents are scrambled. Signed-off-by: Ackerley Tng --- .../selftests/kvm/x86/guest_memfd_conversions_test.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c b/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c index 922261ebaff96..57adb6d84a053 100644 --- a/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c +++ b/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c @@ -137,6 +137,7 @@ static void __gmem_conversions_multipage_##test(test_data_t *t, int nr_pages, \ struct guest_check_data { void *mem; char expected_val; + bool assert_not_equal; char write_val; }; static struct guest_check_data guest_data; @@ -146,7 +147,13 @@ static void guest_do_rmw(void) for (;;) { char *mem = READ_ONCE(guest_data.mem); - GUEST_ASSERT_EQ(READ_ONCE(*mem), READ_ONCE(guest_data.expected_val)); + if (READ_ONCE(guest_data.assert_not_equal)) { + GUEST_ASSERT_NE(READ_ONCE(*mem), + READ_ONCE(guest_data.expected_val)); + } else { + GUEST_ASSERT_EQ(READ_ONCE(*mem), + READ_ONCE(guest_data.expected_val)); + } WRITE_ONCE(*mem, READ_ONCE(guest_data.write_val)); GUEST_SYNC(0); @@ -154,13 +161,15 @@ static void guest_do_rmw(void) } static void run_guest_do_rmw(struct kvm_vcpu *vcpu, loff_t pgoff, - char expected_val, char write_val) + char expected_val, char write_val, + bool assert_not_equal) { struct ucall uc; int r; guest_data.mem = (void *)GUEST_MEMFD_SHARING_TEST_GVA + pgoff * page_size; guest_data.expected_val = expected_val; + guest_data.assert_not_equal = assert_not_equal; guest_data.write_val = write_val; sync_global_to_guest(vcpu->vm, guest_data); @@ -191,7 +200,7 @@ static void test_private(test_data_t *t, loff_t pgoff, char starting_val, char write_val) { TEST_EXPECT_SIGBUS(WRITE_ONCE(t->mem[pgoff * page_size], write_val)); - run_guest_do_rmw(t->vcpu, pgoff, starting_val, write_val); + run_guest_do_rmw(t->vcpu, pgoff, starting_val, write_val, false); TEST_EXPECT_SIGBUS(READ_ONCE(t->mem[pgoff * page_size])); } @@ -207,7 +216,7 @@ static void test_shared(test_data_t *t, loff_t pgoff, char starting_val, char host_write_val, char write_val) { host_do_rmw(t->mem, pgoff, starting_val, host_write_val); - run_guest_do_rmw(t->vcpu, pgoff, host_write_val, write_val); + run_guest_do_rmw(t->vcpu, pgoff, host_write_val, write_val, false); TEST_ASSERT_EQ(READ_ONCE(t->mem[pgoff * page_size]), write_val); } -- 2.54.0.545.g6539524ca2-goog