Date: Sat, 19 May 2018 03:45:38 +0000 (UTC) From: Justin Hibbits <jhibbits@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r333825 - head/sys/powerpc/ofw Message-ID: <201805190345.w4J3jcAv011569@repo.freebsd.org>
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Author: jhibbits Date: Sat May 19 03:45:38 2018 New Revision: 333825 URL: https://svnweb.freebsd.org/changeset/base/333825 Log: Add yet another option for gathering available memory On some POWER9 systems, 'reg' denotes the full memory in the system, while 'linux,usable-memory' denotes the usable memory. Some memory is reserved for NVLink usage, so is partitioned off. Submitted by: Breno Leitao Modified: head/sys/powerpc/ofw/ofw_machdep.c Modified: head/sys/powerpc/ofw/ofw_machdep.c ============================================================================== --- head/sys/powerpc/ofw/ofw_machdep.c Sat May 19 03:23:46 2018 (r333824) +++ head/sys/powerpc/ofw/ofw_machdep.c Sat May 19 03:45:38 2018 (r333825) @@ -342,6 +342,16 @@ ofw_mem_regions(struct mem_region *memp, int *memsz, res = parse_ofw_memory(phandle, "reg", &memp[msz]); msz += res/sizeof(struct mem_region); + + /* + * On POWER9 Systems we might have both linux,usable-memory and + * reg properties. 'reg' denotes all available memory, but we + * must use 'linux,usable-memory', a subset, as some memory + * regions are reserved for NVLink. + */ + if (OF_getproplen(phandle, "linux,usable-memory") >= 0) + res = parse_ofw_memory(phandle, "linux,usable-memory", + &availp[asz]); if (OF_getproplen(phandle, "available") >= 0) res = parse_ofw_memory(phandle, "available", &availp[asz]);
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