File 0069-spapr-Add-ibm-chip-id-property-in-d.patch of Package qemu.611

Overview Repositories Revisions Requests Users Attributes Meta

File 0069-spapr-Add-ibm-chip-id-property-in-d.patch of Package qemu.611

From fbb37c15df99e69b8259120701c72de27e4b719a Mon Sep 17 00:00:00 2001
From: Alexey Kardashevskiy <aik@ozlabs.ru>
Date: Thu, 15 May 2014 21:23:14 +1000
Subject: [PATCH] spapr: Add ibm, chip-id property in device tree

This adds a "ibm,chip-id" property for CPU nodes which should be the same
for all cores in the same CPU socket. The recent guest kernels use this
information to associate threads with sockets.

Refer to the kernel commit 256f2d4b463d3030ebc8d2b54f427543814a2bdc
for more details.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
(cherry picked from commit 10582ff832798813ba3a17f13f3ab46250388b47)
---
 hw/ppc/spapr.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 5e7dc98..bddb254 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -313,6 +313,9 @@ static void *spapr_create_fdt_skel(hwaddr initrd_base,
     uint32_t interrupt_server_ranges_prop[] = {0, cpu_to_be32(smp_cpus)};
     int i, smt = kvmppc_smt_threads();
     unsigned char vec5[] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x80};
+    QemuOpts *opts = qemu_opts_find(qemu_find_opts("smp-opts"), NULL);
+    unsigned sockets = opts ? qemu_opt_get_number(opts, "sockets", 0) : 0;
+    uint32_t cpus_per_socket = sockets ? (smp_cpus / sockets) : 1;
 
     fdt = g_malloc0(FDT_MAX_SIZE);
     _FDT((fdt_create(fdt, FDT_MAX_SIZE)));
@@ -470,6 +473,9 @@ static void *spapr_create_fdt_skel(hwaddr initrd_base,
                                page_sizes_prop, page_sizes_prop_size)));
         }
 
+        _FDT((fdt_property_cell(fdt, "ibm,chip-id",
+                                cs->cpu_index / cpus_per_socket)));
+
         _FDT((fdt_end_node(fdt)));
     }

Places

File 0069-spapr-Add-ibm-chip-id-property-in-d.patch of Package qemu.611

Places