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| author | Peter Zijlstra <[email protected]> | 2020-10-27 09:15:05 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2020-10-27 22:15:23 +0000 |
| commit | 2a9baf5ad4884108b3c6d56a50e8105ccf8a4ee7 (patch) | |
| tree | bc9ec3a80992bfac570f35708959deb34210848b /drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | |
| parent | Merge tag 'x86-urgent-2020-10-27' of git://git.kernel.org/pub/scm/linux/kerne... (diff) | |
| download | kernel-2a9baf5ad4884108b3c6d56a50e8105ccf8a4ee7.tar.gz kernel-2a9baf5ad4884108b3c6d56a50e8105ccf8a4ee7.zip | |
x86/debug: Fix BTF handling
The SDM states that #DB clears DEBUGCTLMSR_BTF, this means that when the
bit is set for userspace (TIF_BLOCKSTEP) and a kernel #DB happens first,
the BTF bit meant for userspace execution is lost.
Have the kernel #DB handler restore the BTF bit when it was requested
for userspace.
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Tested-by: Kyle Huey <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c')
0 files changed, 0 insertions, 0 deletions