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MIPS: cpu: Add new cpu option for Hardware Table Walker.

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Moreover, report hardware page table walker support as 'htw' in the ASE
list of /proc/cpuinfo, if the core implements this feature.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7334/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Markos Chandras 2014-07-14 12:43:28 +01:00 committed by Ralf Baechle
parent 03a58777de
commit e647e6b5b3
3 changed files with 5 additions and 0 deletions
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3
arch/mips/include/asm/cpu-features.h
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@ -29,6 +29,9 @@
#ifndef cpu_has_eva
#define cpu_has_eva (cpu_data[0].options & MIPS_CPU_EVA)
#endif
#ifndef cpu_has_htw
#define cpu_has_htw (cpu_data[0].options & MIPS_CPU_HTW)
#endif
/*
* For the moment we don't consider R6000 and R8000 so we can assume that

1
arch/mips/include/asm/cpu.h
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@ -365,6 +365,7 @@ enum cpu_type_enum {
#define MIPS_CPU_TLBINV 0x02000000ull /* CPU supports TLBINV/F */
#define MIPS_CPU_SEGMENTS 0x04000000ull /* CPU supports Segmentation Control registers */
#define MIPS_CPU_EVA 0x80000000ull /* CPU supports Enhanced Virtual Addressing */
#define MIPS_CPU_HTW 0x100000000ull /* CPU support Hardware Page Table Walker */
/*
* CPU ASE encodings

1
arch/mips/kernel/proc.c
View File

@ -113,6 +113,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
if (cpu_has_vz) seq_printf(m, "%s", " vz");
if (cpu_has_msa) seq_printf(m, "%s", " msa");
if (cpu_has_eva) seq_printf(m, "%s", " eva");
if (cpu_has_htw) seq_printf(m, "%s", " htw");
seq_printf(m, "\n");
if (cpu_has_mmips) {