From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56512) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f6KhB-0000S6-NK for qemu-devel@nongnu.org; Wed, 11 Apr 2018 14:42:15 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f6Kh7-0005NS-OR for qemu-devel@nongnu.org; Wed, 11 Apr 2018 14:42:13 -0400 From: Serhii Popovych Date: Wed, 11 Apr 2018 14:41:58 -0400 Message-Id: <1523472120-56496-1-git-send-email-spopovyc@redhat.com> Subject: [Qemu-devel] [PATCH for 2.13 v3 0/2] target/ppc: Support adding memory to initially memory-less NUMA nodes List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-ppc@nongnu.org Cc: bharata@linux.vnet.ibm.com, qemu-devel@nongnu.org, david@gibson.dropbear.id.au Now PowerPC Linux kernel supports hot-add to NUMA nodes not populated initially with memory we can enable such support in qemu. This requires two changes: o Add device tree property "ibm,max-associativity-domains" to let guest kernel chance to find max possible NUMA node o Revert commit b556854bd852 ("spapr: Don't allow memory hotplug to memory less nodes") to remove check for hot-add to memory-less node. See description messges for individual changes for more details. v3: - Make layer for max_cpus unspecified instead of setting it to zero. Not adding cpu_to_be32(spapr_vcpu_id(spapr, max_cpus - 1)) because at the moment we only want max number for numa nodes to enable feat. - Rebase to current state of master branch. v2: - Reorder patches in series according to description above. - Add extra coment to revert noticing return to previous behaviour for guests without support for hot-add to empty node. - Drop max_cpus from topology in property due to vcpu id discontiguous allocations. Thanks to David Gibson for extra explanation. - Rebase to current state of master branch. Serhii Popovych (2): spapr: Add ibm,max-associativity-domains property Revert "spapr: Don't allow memory hotplug to memory less nodes" hw/ppc/spapr.c | 32 ++++++++++---------------------- 1 file changed, 10 insertions(+), 22 deletions(-) -- 1.8.3.1