From 968a0734db05ad907bc8fffabdbe7da5e1e731f6 Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Thu, 27 Mar 2014 10:57:01 +0000 Subject: MIPS: MT: core_nvpes function to retrieve VPE count This function simply returns the number of VPEs present in the current core, or 1 if the core does not implement the MT ASE. In SMP kernels this will typically equal smp_num_siblings, however it will also be usable in UP kernels and helps prepare for the possibility of a heterogenous system where the VPE count is not the same across all cores. Signed-off-by: Paul Burton Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6665/ Signed-off-by: Ralf Baechle --- arch/mips/include/asm/mipsmtregs.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/mips') diff --git a/arch/mips/include/asm/mipsmtregs.h b/arch/mips/include/asm/mipsmtregs.h index 38b7704ee37..6efa79a27b6 100644 --- a/arch/mips/include/asm/mipsmtregs.h +++ b/arch/mips/include/asm/mipsmtregs.h @@ -176,6 +176,17 @@ #ifndef __ASSEMBLY__ +static inline unsigned core_nvpes(void) +{ + unsigned conf0; + + if (!cpu_has_mipsmt) + return 1; + + conf0 = read_c0_mvpconf0(); + return ((conf0 & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1; +} + static inline unsigned int dvpe(void) { int res = 0; -- cgit v1.2.3-18-g5258