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| author | Vlastimil Babka <vbabka@suse.cz> | 2018-06-21 12:36:29 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-06-21 16:22:25 +0200 |
| commit | 1a7ed1ba4bba6c075d5ad61bb75e3fbc870840d6 (patch) | |
| tree | ea0426d172bbec7734fa8b818f13912fa4fa5144 /scripts/stackusage | |
| parent | x86/apic: Ignore secondary threads if nosmt=force (diff) | |
| download | linux-1a7ed1ba4bba6c075d5ad61bb75e3fbc870840d6.tar.gz linux-1a7ed1ba4bba6c075d5ad61bb75e3fbc870840d6.zip | |
x86/speculation/l1tf: Extend 64bit swap file size limit
The previous patch has limited swap file size so that large offsets cannot
clear bits above MAX_PA/2 in the pte and interfere with L1TF mitigation.
It assumed that offsets are encoded starting with bit 12, same as pfn. But
on x86_64, offsets are encoded starting with bit 9.
Thus the limit can be raised by 3 bits. That means 16TB with 42bit MAX_PA
and 256TB with 46bit MAX_PA.
Fixes: 377eeaa8e11f ("x86/speculation/l1tf: Limit swap file size to MAX_PA/2")
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'scripts/stackusage')
0 files changed, 0 insertions, 0 deletions