diff options
| author | Pawan Gupta <pawan.kumar.gupta@linux.intel.com> | 2022-05-20 05:31:12 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-05-21 12:14:58 +0200 |
| commit | 99a83db5a605137424e1efe29dc0573d6a5b6316 (patch) | |
| tree | ca536c29d62a69ea88842ddebbd23438a1b33aeb /drivers/base | |
| parent | x86/bugs: Group MDS, TAA & Processor MMIO Stale Data mitigations (diff) | |
| download | linux-99a83db5a605137424e1efe29dc0573d6a5b6316.tar.xz linux-99a83db5a605137424e1efe29dc0573d6a5b6316.zip | |
x86/speculation/mmio: Enable CPU Fill buffer clearing on idle
When the CPU is affected by Processor MMIO Stale Data vulnerabilities,
Fill Buffer Stale Data Propagator (FBSDP) can propagate stale data out
of Fill buffer to uncore buffer when CPU goes idle. Stale data can then
be exploited with other variants using MMIO operations.
Mitigate it by clearing the Fill buffer before entering idle state.
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Co-developed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'drivers/base')
0 files changed, 0 insertions, 0 deletions