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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2023-03-12 14:25:59 +0300 |
|---|---|---|
| committer | Dave Hansen <dave.hansen@linux.intel.com> | 2023-03-16 13:08:39 -0700 |
| commit | 82721d8b25d76c5a6f4c6cf4ce4e5b33788820a1 (patch) | |
| tree | 7fab3555d1c44937cc700d3087f942f31c0b23e0 /mm/madvise.c | |
| parent | 6449dcb0cac738219d13c618af7fd8664735f99d (diff) | |
| download | lwn-82721d8b25d76c5a6f4c6cf4ce4e5b33788820a1.tar.gz lwn-82721d8b25d76c5a6f4c6cf4ce4e5b33788820a1.zip | |
x86/mm: Handle LAM on context switch
Linear Address Masking mode for userspace pointers encoded in CR3 bits.
The mode is selected per-process and stored in mm_context_t.
switch_mm_irqs_off() now respects selected LAM mode and constructs CR3
accordingly.
The active LAM mode gets recorded in the tlb_state.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Alexander Potapenko <glider@google.com>
Link: https://lore.kernel.org/all/20230312112612.31869-5-kirill.shutemov%40linux.intel.com
Diffstat (limited to 'mm/madvise.c')
0 files changed, 0 insertions, 0 deletions