Commit 0986c1a5 authored by Christian König's avatar Christian König Committed by Alex Deucher

drm/radeon: stop poisoning the GART TLB

When we set the valid bit on invalid GART entries they are
loaded into the TLB when an adjacent entry is loaded. This
poisons the TLB with invalid entries which are sometimes
not correctly removed on TLB flush.

For stable inclusion the patch probably needs to be modified a bit.
Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent ea292861
...@@ -634,7 +634,10 @@ int rs600_gart_set_page(struct radeon_device *rdev, int i, uint64_t addr) ...@@ -634,7 +634,10 @@ int rs600_gart_set_page(struct radeon_device *rdev, int i, uint64_t addr)
return -EINVAL; return -EINVAL;
} }
addr = addr & 0xFFFFFFFFFFFFF000ULL; addr = addr & 0xFFFFFFFFFFFFF000ULL;
addr |= R600_PTE_GART; if (addr == rdev->dummy_page.addr)
addr |= R600_PTE_SYSTEM | R600_PTE_SNOOPED;
else
addr |= R600_PTE_GART;
writeq(addr, ptr + (i * 8)); writeq(addr, ptr + (i * 8));
return 0; return 0;
} }
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment