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Date: Wed, 24 Sep 2014 18:07:32 +0100 From: Bryan O'Donoghue <pure.logic@...us-software.ie> To: hpa@...or.com, mingo@...hat.com, tglx@...utronix.de, x86@...nel.org Cc: linux-kernel@...r.kernel.org, pure.logic@...us-software.ie Subject: [PATCH] x86: Quark: Flush TLB via CR3 not CR4.PGE in setup_arch() Quark X1000 requires CR3 to be rewritten to flush TLB entries irrespective of the PGE bits in CR4 or PTE.PGE This patch flushes the TLB in the required way for Quark in setup_arch() See Quark Core_DevMan_001.pdf section 6.4.11 Signed-off-by: Bryan O'Donoghue <pure.logic@...us-software.ie> --- arch/x86/kernel/setup.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 41ead8d..1d2396a 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -879,7 +879,10 @@ void __init setup_arch(char **cmdline_p) KERNEL_PGD_PTRS); load_cr3(swapper_pg_dir); - __flush_tlb_all(); + if (boot_cpu_data.x86 == 5 && boot_cpu_data.x86_model == 9) + __flush_tlb(); + else + __flush_tlb_all(); #else printk(KERN_INFO "Command line: %s\n", boot_command_line); #endif -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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