diff options
| author | Fenghua Yu <fenghua.yu@intel.com> | 2022-02-07 15:02:51 -0800 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-02-15 11:31:43 +0100 |
| commit | fa6af69f38d3f409bedc55d0112eec36ed526d4b (patch) | |
| tree | 24ecc48dfb6bb2b66a3a8900a981e18a33017169 /tools/perf/scripts/python/sched-migration.py | |
| parent | a3d29e8291b622780eb6e4e3eeaf2b24ec78fd43 (diff) | |
x86/traps: Demand-populate PASID MSR via #GP
All tasks start with PASID state disabled. This means that the first
time they execute an ENQCMD instruction they will take a #GP fault.
Modify the #GP fault handler to check if the "mm" for the task has
already been allocated a PASID. If so, try to fix the #GP fault by
loading the IA32_PASID MSR.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20220207230254.3342514-9-fenghua.yu@intel.com
Diffstat (limited to 'tools/perf/scripts/python/sched-migration.py')
0 files changed, 0 insertions, 0 deletions