Date: Thu, 11 Jan 2018 09:39:38 +0000 (UTC) From: Wojciech Macek <wma@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r327814 - in head/sys/powerpc: include powernv Message-ID: <201801110939.w0B9dcMW032280@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: wma Date: Thu Jan 11 09:39:38 2018 New Revision: 327814 URL: https://svnweb.freebsd.org/changeset/base/327814 Log: PowerNV: set LPCR[LPES] correctly 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 Modified: head/sys/powerpc/include/spr.h head/sys/powerpc/powernv/platform_powernv.c Modified: head/sys/powerpc/include/spr.h ============================================================================== --- head/sys/powerpc/include/spr.h Thu Jan 11 09:34:33 2018 (r327813) +++ head/sys/powerpc/include/spr.h Thu Jan 11 09:39:38 2018 (r327814) @@ -199,6 +199,9 @@ #define FSL_E300C3 0x8085 #define FSL_E300C4 0x8086 +#define SPR_LPCR 0x13e /* Logical Partitioning Control */ +#define LPCR_LPES 0x008 /* Bit 60 */ + #define SPR_EPCR 0x133 #define EPCR_EXTGS 0x80000000 #define EPCR_DTLBGS 0x40000000 Modified: head/sys/powerpc/powernv/platform_powernv.c ============================================================================== --- head/sys/powerpc/powernv/platform_powernv.c Thu Jan 11 09:34:33 2018 (r327813) +++ head/sys/powerpc/powernv/platform_powernv.c Thu Jan 11 09:39:38 2018 (r327814) @@ -118,6 +118,9 @@ powernv_attach(platform_t plat) cpu_idle_hook = powernv_cpu_idle; + /* Direct interrupts to SRR instead of HSRR */ + mtspr(SPR_LPCR, mfspr(SPR_LPCR) | LPCR_LPES); + return (0); }
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201801110939.w0B9dcMW032280>