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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-21 10:41:48 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-21 10:41:48 -0800 |
| commit | 319f1e04c7e7016233f998a1a48cd3d17da2108f (patch) | |
| tree | 90119215525c4bcb0d1756c1468eeaebcdb9efba /arch/x86/kernel/cpu/mcheck | |
| parent | 66f816241895dc8a1614c1114c0a97b167e4ce64 (diff) | |
| parent | f23d74f6c66c3697e032550eeef3f640391a3a7d (diff) | |
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 kexec fix from Thomas Gleixner:
"A single fix for the WBINVD issue introduced by the SME support which
causes kexec fails on non AMD/SME capable CPUs. Issue WBINVD only when
the CPU has SME and avoid doing so in a loop"
[ Side note: this patch fixes the problem, but it isn't entirely clear
why it is required. The wbinvd should just work regardless, but there
seems to be some system - as opposed to CPU - issue, since the wbinvd
causes more problems later in the shutdown sequence, but wbinvd
instructions while the system is still active are not problematic.
Possibly some SMI or pending machine check issue on the affected system ]
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Rework wbinvd, hlt operation in stop_this_cpu()
Diffstat (limited to 'arch/x86/kernel/cpu/mcheck')
0 files changed, 0 insertions, 0 deletions