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| author | Andy Lutomirski <[email protected]> | 2017-12-12 15:56:36 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2017-12-15 15:58:53 +0000 |
| commit | c739f930be1dd5fd949030e3475a884fe06dae9b (patch) | |
| tree | 64721708d3ac7a0b35b4c0256b6f451fd461d733 /tools/perf/scripts/python/futex-contention.py | |
| parent | objtool: Resync objtool's instruction decoder source code copy with the kerne... (diff) | |
| download | kernel-c739f930be1dd5fd949030e3475a884fe06dae9b.tar.gz kernel-c739f930be1dd5fd949030e3475a884fe06dae9b.zip | |
x86/espfix/64: Fix espfix double-fault handling on 5-level systems
Using PGDIR_SHIFT to identify espfix64 addresses on 5-level systems
was wrong, and it resulted in panics due to unhandled double faults.
Use P4D_SHIFT instead, which is correct on 4-level and 5-level
machines.
This fixes a panic when running x86 selftests on 5-level machines.
Signed-off-by: Andy Lutomirski <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: David Laight <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Fixes: 1d33b219563f ("x86/espfix: Add support for 5-level paging")
Link: http://lkml.kernel.org/r/24c898b4f44fdf8c22d93703850fb384ef87cfdc.1513035461.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/futex-contention.py')
0 files changed, 0 insertions, 0 deletions