[PATCH] x86, setup: Additional __flush_tlb for Quak X1000
From: Ong Boon Leong
Date: Fri Sep 26 2014 - 00:31:26 EST
With respect to submission sent below:
"x86: Quark: Comment setup_arch for TLB/PGE bugfix"
__flush_tlb_all() does not take __flush_tlb() because cpu_has_pge
flag that is setup in head_32.S by CPUID and not changed much later.
So, the comment added are incorrect. Explaination below:
For change on:
"x86/intel/quark: Switch off CR4.PGE so TLB flush uses CR3 instead"
The X86_FEATURE_PGE cap is cleared in early_cpu_init() -->
early_identify_cpu() --> early_init_intel(). And, early_cpu_init()
is performed after the __flush_tlb_all() step.
Anyway, thanks to Bryan for submitting patch for Quark SoC.
FYI, the suggestion to add __flush_tlb() has been discussed with some
of the kernel developers CC'ed below inclusing HPA himself.
Thank you very much,
Ong Boon Leong
Ong Boon Leong (1):
x86, setup: add __flush_tlb() for Intel Quark X1000
arch/x86/kernel/setup.c | 7 +++++++
1 file changed, 7 insertions(+)
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