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KVM: selftests: Move memslot_perf_test off the 256M ELF load address

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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 <anushree.mathur@linux.ibm.com>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Reviewed-by: Gautam Menghani <gautam@linux.ibm.com>
Tested-by: Gautam Menghani <gautam@linux.ibm.com>
Acked-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/11b5712b213b7359bbf3bad32601e4373dac43bc.1791280439.git.ritesh.list@gmail.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Ritesh Harjani (IBM) 2026-10-06 15:58:36 +05:30 committed by Sean Christopherson
parent ab1d400067
commit f51639c0ee
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/kvm/memslot_perf_test.c
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@ -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)