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A fix & simplification for SGI IP27 exception handlers, and a small

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MAINTAINERS update for Broadcom MIPS systems.
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Merge tag 'mips_fixes_5.4_4' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS fixes from Paul Burton:
 "A fix and simplification for SGI IP27 exception handlers, and a small
  MAINTAINERS update for Broadcom MIPS systems"

* tag 'mips_fixes_5.4_4' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MAINTAINERS: Remove Kevin as maintainer of BMIPS generic platforms
  MIPS: SGI-IP27: fix exception handler replication
This commit is contained in:
Linus Torvalds 2019-11-15 09:10:13 -08:00
commit 34b38f5abd
4 changed files with 6 additions and 27 deletions
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1
MAINTAINERS
View File

@ -3261,7 +3261,6 @@ S: Maintained
F: drivers/cpufreq/bmips-cpufreq.c
BROADCOM BMIPS MIPS ARCHITECTURE
M: Kevin Cernekee <cernekee@gmail.com>
M: Florian Fainelli <f.fainelli@gmail.com>
L: bcm-kernel-feedback-list@broadcom.com
L: linux-mips@vger.kernel.org

7
arch/mips/sgi-ip27/Kconfig
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@ -38,10 +38,3 @@ config REPLICATE_KTEXT
Say Y here to enable replicating the kernel text across multiple
nodes in a NUMA cluster. This trades memory for speed.
config REPLICATE_EXHANDLERS
bool "Exception handler replication support"
depends on SGI_IP27
help
Say Y here to enable replicating the kernel exception handlers
across multiple nodes in a NUMA cluster. This trades memory for
speed.

21
arch/mips/sgi-ip27/ip27-init.c
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@ -69,23 +69,14 @@ static void per_hub_init(cnodeid_t cnode)
hub_rtc_init(cnode);
#ifdef CONFIG_REPLICATE_EXHANDLERS
/*
* If this is not a headless node initialization,
* copy over the caliased exception handlers.
*/
if (get_compact_nodeid() == cnode) {
extern char except_vec2_generic, except_vec3_generic;
extern void build_tlb_refill_handler(void);
memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80);
memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80);
build_tlb_refill_handler();
memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80);
memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100);
if (nasid) {
/* copy exception handlers from first node to current node */
memcpy((void *)NODE_OFFSET_TO_K0(nasid, 0),
(void *)CKSEG0, 0x200);
__flush_cache_all();
/* switch to node local exception handlers */
REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
}
#endif
}
void per_cpu_init(void)

4
arch/mips/sgi-ip27/ip27-memory.c
View File

@ -332,11 +332,7 @@ static void __init mlreset(void)
* thinks it is a node 0 address.
*/
REMOTE_HUB_S(nasid, PI_REGION_PRESENT, (region_mask | 1));
#ifdef CONFIG_REPLICATE_EXHANDLERS
REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_8K);
#else
REMOTE_HUB_S(nasid, PI_CALIAS_SIZE, PI_CALIAS_SIZE_0);
#endif
#ifdef LATER
/*