linux-kernel - [PATCH] selftests: kvm: fix overlapping addresses in memslot_perf

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Date:   Fri, 28 May 2021 15:11:34 -0400
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     "Maciej S . Szmigiero" <maciej.szmigiero@...cle.com>
Subject: [PATCH] selftests: kvm: fix overlapping addresses in memslot_perf_test

The memory that is allocated in vm_create is already mapped close to
GPA 0, because test_execute passes the requested memory to
prepare_vm.  This causes overlapping memory regions and the
test crashes.  For simplicity just move MEM_GPA higher.

Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 tools/testing/selftests/kvm/memslot_perf_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/memslot_perf_test.c b/tools/testing/selftests/kvm/memslot_perf_test.c
index 11239652d805..6d28e920b1e3 100644
--- a/tools/testing/selftests/kvm/memslot_perf_test.c
+++ b/tools/testing/selftests/kvm/memslot_perf_test.c
@@ -29,7 +29,7 @@

 #define MEM_SIZE		((512U << 20) + 4096)
 #define MEM_SIZE_PAGES		(MEM_SIZE / 4096)
-#define MEM_GPA		0x10000000UL
+#define MEM_GPA			(MEM_SIZE + 0x10000000UL)
 #define MEM_AUX_GPA		MEM_GPA
 #define MEM_SYNC_GPA		MEM_AUX_GPA
 #define MEM_TEST_GPA		(MEM_AUX_GPA + 4096)
-- 
2.27.0