commit 4edf00a46bee692f62578b5280c5774f9b65a08f
author Paul Burton <paul.burton@imgtec.com> Fri May 06 14:36:23 2016 +0100
committer Ralf Baechle <ralf@linux-mips.org> Fri May 13 14:02:20 2016 +0200
tree 3536ce8de630a22e4ff20be455e95ab202bfc436
parent f1b711c638c7df56112eff8e9661c91202782516

MIPS: Retrieve ASID masks using function accepting struct cpuinfo_mips

In preparation for supporting variable ASID masks, retrieve ASID masks
using functions in asm/cpu-info.h which accept struct cpuinfo_mips. This
will allow those functions to determine the ASID mask based upon the CPU
in a later patch. This also allows for the r3k & r8k cases to be handled
in Kconfig, which is arguably cleaner than the previous #ifdefs.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13210/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/lib/dump_tlb.c

diff --git a/arch/mips/lib/dump_tlb.c b/arch/mips/lib/dump_tlb.c
index 92a3731..3283aa7 100644
--- a/arch/mips/lib/dump_tlb.c
+++ b/arch/mips/lib/dump_tlb.c
@@ -73,6 +73,8 @@
 	unsigned long s_entryhi, entryhi, asid;
 	unsigned long long entrylo0, entrylo1, pa;
 	unsigned int s_index, s_pagemask, pagemask, c0, c1, i;
+	unsigned long asidmask = cpu_asid_mask(&current_cpu_data);
+	int asidwidth = DIV_ROUND_UP(ilog2(asidmask) + 1, 4);
 #ifdef CONFIG_32BIT
 	bool xpa = cpu_has_xpa && (read_c0_pagegrain() & PG_ELPA);
 	int pwidth = xpa ? 11 : 8;
@@ -86,7 +88,7 @@
 	s_pagemask = read_c0_pagemask();
 	s_entryhi = read_c0_entryhi();
 	s_index = read_c0_index();
-	asid = s_entryhi & 0xff;
+	asid = s_entryhi & asidmask;
 
 	for (i = first; i <= last; i++) {
 		write_c0_index(i);
@@ -115,7 +117,7 @@
 		 * due to duplicate TLB entry.
 		 */
 		if (!((entrylo0 | entrylo1) & ENTRYLO_G) &&
-		    (entryhi & 0xff) != asid)
+		    (entryhi & asidmask) != asid)
 			continue;
 
 		/*
@@ -126,9 +128,9 @@
 		c0 = (entrylo0 & ENTRYLO_C) >> ENTRYLO_C_SHIFT;
 		c1 = (entrylo1 & ENTRYLO_C) >> ENTRYLO_C_SHIFT;
 
-		printk("va=%0*lx asid=%02lx\n",
+		printk("va=%0*lx asid=%0*lx\n",
 		       vwidth, (entryhi & ~0x1fffUL),
-		       entryhi & 0xff);
+		       asidwidth, entryhi & asidmask);
 		/* RI/XI are in awkward places, so mask them off separately */
 		pa = entrylo0 & ~(MIPS_ENTRYLO_RI | MIPS_ENTRYLO_XI);
 		if (xpa)

arch/mips/lib/r3k_dump_tlb.c

diff --git a/arch/mips/lib/r3k_dump_tlb.c b/arch/mips/lib/r3k_dump_tlb.c
index cfcbb52..744f4a7 100644
--- a/arch/mips/lib/r3k_dump_tlb.c
+++ b/arch/mips/lib/r3k_dump_tlb.c
@@ -29,9 +29,10 @@
 {
 	int	i;
 	unsigned int asid;
-	unsigned long entryhi, entrylo0;
+	unsigned long entryhi, entrylo0, asid_mask;
 
-	asid = read_c0_entryhi() & ASID_MASK;
+	asid_mask = cpu_asid_mask(&current_cpu_data);
+	asid = read_c0_entryhi() & asid_mask;
 
 	for (i = first; i <= last; i++) {
 		write_c0_index(i<<8);
@@ -46,7 +47,7 @@
 		/* Unused entries have a virtual address of KSEG0.  */
 		if ((entryhi & PAGE_MASK) != KSEG0 &&
 		    (entrylo0 & R3K_ENTRYLO_G ||
-		     (entryhi & ASID_MASK) == asid)) {
+		     (entryhi & asid_mask) == asid)) {
 			/*
 			 * Only print entries in use
 			 */
@@ -55,7 +56,7 @@
 			printk("va=%08lx asid=%08lx"
 			       "  [pa=%06lx n=%d d=%d v=%d g=%d]",
 			       entryhi & PAGE_MASK,
-			       entryhi & ASID_MASK,
+			       entryhi & asid_mask,
 			       entrylo0 & PAGE_MASK,
 			       (entrylo0 & R3K_ENTRYLO_N) ? 1 : 0,
 			       (entrylo0 & R3K_ENTRYLO_D) ? 1 : 0,