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Sun, 04 Oct 2026 20:47:51 -0700 (PDT) From: "Ritesh Harjani (IBM)" To: kvm@vger.kernel.org, Sean Christopherson Cc: Paolo Bonzini , linuxppc-dev@lists.ozlabs.org, Michael Ellerman , Christophe Leroy , Anushree Mathur , Venkat Rao Bagalkote , Harsh Prateek Bora , Madhavan Srinivasan , Shrikanth Hegde , linux-kernel@vger.kernel.org, "Ritesh Harjani (IBM)" Subject: [PATCH v6 2/5] KVM: selftests: Move memslot_perf_test off the 256M ELF load address Date: Mon, 5 Oct 2026 09:17:25 +0530 Message-Id: <2affbc2727a4fdae1d187dada40a26e0ab581c4a.1791014924.git.ritesh.list@gmail.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit KVM selftests are built with -fno-PIE/-no-pie so the binary uses fixed load addresses. On powerpc64, GNU ld default links at 0x10000000 (256M) which is also the MEM_GPA, so the identity map trips with the error: PTE already present at level: 4 gva: 0x10000000 pte:0xc00000000002018f Put the test slots at 512M instead which is past the ELF. e.g. failure w/o this fix: ./memslot_perf_test -s 514 Random seed: 0x423558ef Testing map performance with 1 runs, 5 seconds each ==== Test Assertion Failure ==== lib/powerpc/processor.c:235: !pte pid=371 tid=371 errno=2 - No such file or directory 1 0x0000000010018293: virt_arch_pg_map at processor.c:235 2 0x0000000010008b3f: virt_pg_map at kvm_util.h:1325 3 (inlined by) virt_map at kvm_util.c:1571 4 0x0000000010001cab: prepare_vm at memslot_perf_test.c:353 5 (inlined by) test_execute at memslot_perf_test.c:816 6 (inlined by) test_loop at memslot_perf_test.c:1062 7 (inlined by) main at memslot_perf_test.c:1136 8 0x000000001001d713: __libc_start_call_main at libc-start.o:? 9 0x000000001001db47: __libc_start_main_impl at ??:? PTE already present at level: 4 gva: 0x10000000 pte:0xc00000000002018f Tested-by: Anushree Mathur Signed-off-by: Ritesh Harjani (IBM) --- tools/testing/selftests/kvm/Makefile.kvm | 1 + tools/testing/selftests/kvm/memslot_perf_test.c | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/Makefile.kvm b/tools/testing/selftests/kvm/Makefile.kvm index 6e672484a22f..a7ecd7a242a9 100644 --- a/tools/testing/selftests/kvm/Makefile.kvm +++ b/tools/testing/selftests/kvm/Makefile.kvm @@ -262,6 +262,7 @@ TEST_GEN_PROGS_powerpc += kvm_binary_stats_test TEST_GEN_PROGS_powerpc += kvm_page_table_test TEST_GEN_PROGS_powerpc += set_memory_region_test TEST_GEN_PROGS_powerpc += memslot_modification_stress_test +TEST_GEN_PROGS_powerpc += memslot_perf_test SPLIT_TESTS += arch_timer SPLIT_TESTS += get-reg-list diff --git a/tools/testing/selftests/kvm/memslot_perf_test.c b/tools/testing/selftests/kvm/memslot_perf_test.c index 844ea9b7bb41..2913a4de4cc9 100644 --- a/tools/testing/selftests/kvm/memslot_perf_test.c +++ b/tools/testing/selftests/kvm/memslot_perf_test.c @@ -30,7 +30,7 @@ #define MEM_EXTRA_SIZE SZ_64K #define MEM_SIZE (SZ_512M + MEM_EXTRA_SIZE) -#define MEM_GPA SZ_256M +#define MEM_GPA SZ_512M #define MEM_AUX_GPA MEM_GPA #define MEM_SYNC_GPA MEM_AUX_GPA #define MEM_TEST_GPA (MEM_AUX_GPA + MEM_EXTRA_SIZE) -- 2.39.5