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PowerNV: set LPCR[LPES] correctly

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Make sure to set LPCR[LPES] so that external interrupts set SRR0 and SRR1
instead of HSRR0 and HSRR1. Without this, external interrupt handlers would
get the wrong MSR value when executing, causing eventual madness.

Created by:            Nathan Whitehorn <nwhitehorn@freebsd.org>
Submitted by:          Wojciech Macek <wma@freebsd.org>
Sponsored by:          FreeBSD Foundation
This commit is contained in:
Wojciech Macek 2018-01-11 09:39:38 +00:00
parent 01d7bda7b7
commit c024897601
2 changed files with 6 additions and 0 deletions
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3
sys/powerpc/include/spr.h
View File

@ -199,6 +199,9 @@
#define FSL_E300C3 0x8085 #define FSL_E300C3 0x8085
#define FSL_E300C4 0x8086 #define FSL_E300C4 0x8086
#define SPR_LPCR 0x13e /* Logical Partitioning Control */
#define LPCR_LPES 0x008 /* Bit 60 */
#define SPR_EPCR 0x133 #define SPR_EPCR 0x133
#define EPCR_EXTGS 0x80000000 #define EPCR_EXTGS 0x80000000
#define EPCR_DTLBGS 0x40000000 #define EPCR_DTLBGS 0x40000000

3
sys/powerpc/powernv/platform_powernv.c
View File

@ -118,6 +118,9 @@ powernv_attach(platform_t plat)
cpu_idle_hook = powernv_cpu_idle; cpu_idle_hook = powernv_cpu_idle;
/* Direct interrupts to SRR instead of HSRR */
mtspr(SPR_LPCR, mfspr(SPR_LPCR) | LPCR_LPES);
return (0); return (0);
} }