From a6030d7e0b35a23c82e4a765b53dc3847bcdb4d1 Mon Sep 17 00:00:00 2001 From: Reza Arbab Date: Thu, 16 Jul 2020 17:56:55 -0500 Subject: spapr: Add a new level of NUMA for GPUs NUMA nodes corresponding to GPU memory currently have the same affinity/distance as normal memory nodes. Add a third NUMA associativity reference point enabling us to give GPU nodes more distance. This is guest visible information, which shouldn't change under a running guest across migration between different qemu versions, so make the change effective only in new (pseries > 5.0) machine types. Before, `numactl -H` output in a guest with 4 GPUs (nodes 2-5): node distances: node 0 1 2 3 4 5 0: 10 40 40 40 40 40 1: 40 10 40 40 40 40 2: 40 40 10 40 40 40 3: 40 40 40 10 40 40 4: 40 40 40 40 10 40 5: 40 40 40 40 40 10 After: node distances: node 0 1 2 3 4 5 0: 10 40 80 80 80 80 1: 40 10 80 80 80 80 2: 80 80 10 80 80 80 3: 80 80 80 10 80 80 4: 80 80 80 80 10 80 5: 80 80 80 80 80 10 These are the same distances as on the host, mirroring the change made to host firmware in skiboot commit f845a648b8cb ("numa/associativity: Add a new level of NUMA for GPU's"). Signed-off-by: Reza Arbab Message-Id: <20200716225655.24289-1-arbab@linux.ibm.com> Signed-off-by: David Gibson --- include/hw/pci-host/spapr.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/hw/pci-host') diff --git a/include/hw/pci-host/spapr.h b/include/hw/pci-host/spapr.h index 8877ff5..600eb55 100644 --- a/include/hw/pci-host/spapr.h +++ b/include/hw/pci-host/spapr.h @@ -94,6 +94,7 @@ struct SpaprPhbState { hwaddr nv2_gpa_win_addr; hwaddr nv2_atsd_win_addr; SpaprPhbPciNvGpuConfig *nvgpus; + bool pre_5_1_assoc; }; #define SPAPR_PCI_MEM_WIN_BUS_OFFSET 0x80000000ULL -- cgit v1.1