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| author | Nicholas Piggin <[email protected]> | 2021-07-16 02:43:09 +0000 |
|---|---|---|
| committer | Michael Ellerman <[email protected]> | 2021-07-17 04:33:17 +0000 |
| commit | bd31ecf44b8e18ccb1e5f6b50f85de6922a60de3 (patch) | |
| tree | de056f1c39deb16d8a237c2e51d0bf2697cf02a5 /drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c | |
| parent | KVM: PPC: Book3S HV P9: Fix guest TM support (diff) | |
| download | kernel-bd31ecf44b8e18ccb1e5f6b50f85de6922a60de3.tar.gz kernel-bd31ecf44b8e18ccb1e5f6b50f85de6922a60de3.zip | |
KVM: PPC: Book3S: Fix CONFIG_TRANSACTIONAL_MEM=n crash
When running CPU_FTR_P9_TM_HV_ASSIST, HFSCR[TM] is set for the guest
even if the host has CONFIG_TRANSACTIONAL_MEM=n, which causes it to be
unprepared to handle guest exits while transactional.
Normal guests don't have a problem because the HTM capability will not
be advertised, but a rogue or buggy one could crash the host.
Fixes: 4bb3c7a0208f ("KVM: PPC: Book3S HV: Work around transactional memory bugs in POWER9")
Reported-by: Alexey Kardashevskiy <[email protected]>
Signed-off-by: Nicholas Piggin <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c')
0 files changed, 0 insertions, 0 deletions