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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-06-20 21:50:07 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-06-20 21:54:00 +0100 |
| commit | a153f95393515c11a76f87145d91e2fa4f1ff568 (patch) | |
| tree | 945f16171db94a9312678c32c11b04ccafc63af3 | |
| parent | 5020029c1907fd2d999d34cfcba3704d8bbcea13 (diff) | |
igt/prime_vgem: Insert a WCB flush between distinct mmappings
Since we use distinct WC addresses for the same page, we need to flush
the WCB after the write in order to see it from the other mmaping.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
| -rw-r--r-- | tests/prime_vgem.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tests/prime_vgem.c b/tests/prime_vgem.c index 6ccadcbd..86e25256 100644 --- a/tests/prime_vgem.c +++ b/tests/prime_vgem.c @@ -119,15 +119,18 @@ static void test_gtt(int vgem, int i915) igt_assert_eq(ptr[1024*i], ~i); munmap(ptr, scratch.size); - ptr = vgem_mmap(vgem, &scratch, PROT_WRITE); gtt = gem_mmap__gtt(i915, handle, scratch.size, PROT_WRITE); +#if defined(__x86_64__) for (i = 0; i < 1024; i++) { gtt[1024*i] = i; + __builtin_ia32_sfence(); igt_assert_eq(ptr[1024*i], i); ptr[1024*i] = ~i; + __builtin_ia32_sfence(); igt_assert_eq(gtt[1024*i], ~i); } +#endif munmap(gtt, scratch.size); munmap(ptr, scratch.size); |