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gpu: nvgpu: Do not generate any ctag info unless enabled

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Do not put any ctag data in the PTEs unless compression is
actually enabled for the mapping.

Bug 1732449
JIRA DNVGPU-12

Change-Id: I2abfbf9d1282af24541f8199bd9fbf2133c12899
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1133790
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
This commit is contained in:
Alex Waterman
2016-04-27 10:42:15 -07:00
committed by Terje Bergstrom
parent 7790904416
commit a4ca63f433
1 changed files with 1 additions and 2 deletions
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3
drivers/gpu/nvgpu/gk20a/mm_gk20a.c
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@@ -2435,10 +2435,9 @@ static int update_gmmu_pte_locked(struct vm_gk20a *vm,
gmmu_pte_kind_f(kind_v) | gmmu_pte_kind_f(kind_v) |
gmmu_pte_comptagline_f((u32)(*ctag >> ctag_shift)); gmmu_pte_comptagline_f((u32)(*ctag >> ctag_shift));
if (vm->mm->use_full_comp_tag_line && *iova & 0x10000) { if (*ctag && vm->mm->use_full_comp_tag_line && *iova & 0x10000)
pte_w[1] |= gmmu_pte_comptagline_f( pte_w[1] |= gmmu_pte_comptagline_f(
1 << (gmmu_pte_comptagline_s() - 1)); 1 << (gmmu_pte_comptagline_s() - 1));
}
if (rw_flag == gk20a_mem_flag_read_only) { if (rw_flag == gk20a_mem_flag_read_only) {
pte_w[0] |= gmmu_pte_read_only_true_f(); pte_w[0] |= gmmu_pte_read_only_true_f();