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Commit e647e6b5 authored by Markos Chandras's avatar Markos Chandras Committed by Ralf Baechle
Browse files

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



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: default avatarMarkos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7334/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 03a58777

arch/mips/include/asm/cpu-features.h

+3 −0
Original line number Diff line number Diff line
@@ -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

arch/mips/include/asm/cpu.h

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/mips/kernel/proc.c

+1 −0
Original line number Diff line number Diff line
@@ -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) {