[Qemu-devel] [PATCH 04/11] spapr: improve ibm, architecture-vec-5 property handling

[Michael Roth]

ibm,architecture-vec-5 is supposed to encode all option vector 5 bits
negotiated between platform/guest. Currently we hardcode this property
in the boot-time device tree to advertise a single negotiated
capability, "Form 1" NUMA Affinity, regardless of whether or not CAS
has been invoked or that capability has actually been negotiated.

Improve this by generating ibm,architecture-vec-5 based on the full
set of option vector 5 capabilities negotiated via CAS.

Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
---
 hw/ppc/spapr.c              | 22 +++++++++++++++++-----
 include/hw/ppc/spapr_ovec.h |  1 +
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 460c7a8..3b2a459 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -285,7 +285,6 @@ static void *spapr_create_fdt_skel(hwaddr initrd_base,
     GString *qemu_hypertas = g_string_sized_new(256);
     uint32_t refpoints[] = {cpu_to_be32(0x4), cpu_to_be32(0x4)};
     uint32_t interrupt_server_ranges_prop[] = {0, cpu_to_be32(max_cpus)};
-    unsigned char vec5[] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x80};
     char *buf;
 
     add_str(hypertas, "hcall-pft");
@@ -351,9 +350,6 @@ static void *spapr_create_fdt_skel(hwaddr initrd_base,
     /* /chosen */
     _FDT((fdt_begin_node(fdt, "chosen")));
 
-    /* Set Form1_affinity */
-    _FDT((fdt_property(fdt, "ibm,architecture-vec-5", vec5, sizeof(vec5))));
-
     _FDT((fdt_property_string(fdt, "bootargs", kernel_cmdline)));
     _FDT((fdt_property(fdt, "linux,initrd-start",
                        &start_prop, sizeof(start_prop))));
@@ -858,14 +854,28 @@ static int spapr_populate_cas_updates(sPAPRMachineState 
*spapr, void *fdt,
                                       sPAPROptionVector *ov5_updates)
 {
     sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
-    int ret = 0;
+    int ret = 0, offset;
 
     /* Generate ibm,dynamic-reconfiguration-memory node if required */
     if (spapr_ovec_test(ov5_updates, OV5_DRCONF_MEMORY)) {
         g_assert(smc->dr_lmb_enabled);
         ret = spapr_populate_drconf_memory(spapr, fdt);
+        if (ret) {
+            goto out;
+        }
     }
 
+    offset = fdt_path_offset(fdt, "/chosen");
+    if (offset < 0) {
+        offset = fdt_add_subnode(fdt, 0, "chosen");
+        if (offset < 0) {
+            return offset;
+        }
+    }
+    ret = spapr_ovec_populate_dt(fdt, offset, spapr->ov5_cas,
+                                 "ibm,architecture-vec-5");
+
+out:
     return ret;
 }
 
@@ -1804,6 +1814,8 @@ static void ppc_spapr_init(MachineState *machine)
         spapr_validate_node_memory(machine, &error_fatal);
     }
 
+    spapr_ovec_set(spapr->ov5, OV5_FORM1_AFFINITY);
+
     /* init CPUs */
     if (machine->cpu_model == NULL) {
         machine->cpu_model = kvm_enabled() ? "host" : smc->tcg_default_cpu;
diff --git a/include/hw/ppc/spapr_ovec.h b/include/hw/ppc/spapr_ovec.h
index 09afd59..47fa04c 100644
--- a/include/hw/ppc/spapr_ovec.h
+++ b/include/hw/ppc/spapr_ovec.h
@@ -44,6 +44,7 @@ typedef struct sPAPROptionVector sPAPROptionVector;
 
 /* option vector 5 */
 #define OV5_DRCONF_MEMORY       OV_BIT(2, 2)
+#define OV5_FORM1_AFFINITY      OV_BIT(5, 0)
 
 /* interfaces */
 sPAPROptionVector *spapr_ovec_new(void);
-- 
1.9.1