File 0101-spapr_pci-Advertise-MSI-quota.patch of Package qemu-linux-user.2059

From f1a23441e8d26759ef350759aa7c865f3de7bdb5 Mon Sep 17 00:00:00 2001
From: Badari Pulavarty <pbadari@us.ibm.com>
Date: Wed, 11 Jun 2014 18:49:33 +1000
Subject: [PATCH] spapr_pci: Advertise MSI quota

Hotplug of multiple disks fails due to MSI vector quota check.
Number of MSI vectors default to 8 allowing only 4 devices.
This happens on RHEL6.5 guest. RHEL7 and SLES11 guests fallback
to INTX.

One way to workaround the issue is to increase total MSIs,
so that MSI quota check allows us to hotplug multiple disks.

This sets the quota to the maximum number of interupts XICS has
which is 1024 now (XICS_IRQS). This moves XICS_IRQS from spapr.c
to xics.h for wider visibility.

Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
[aik: put XICS_IRQS=1024 instead of 64i, fixed endianness and size]
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>

(cherry picked from commit 9dbae97723e964692364fb43012c6fa5448a661f)
---
 hw/ppc/spapr.c        | 1 -
 hw/ppc/spapr_pci.c    | 1 +
 include/hw/ppc/xics.h | 2 ++
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index b31c657..d59faf4 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -80,7 +80,6 @@
 #define TIMEBASE_FREQ           512000000ULL
 
 #define MAX_CPUS                256
-#define XICS_IRQS               1024
 
 #define PHANDLE_XICP            0x00001111
 
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 8b4f30b..cf9d5fa 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -825,6 +825,7 @@ int spapr_populate_pci_dt(sPAPRPHBState *phb,
     _FDT(fdt_setprop(fdt, bus_off, "ranges", &ranges, sizeof(ranges)));
     _FDT(fdt_setprop(fdt, bus_off, "reg", &bus_reg, sizeof(bus_reg)));
     _FDT(fdt_setprop_cell(fdt, bus_off, "ibm,pci-config-space-type", 0x1));
+    _FDT(fdt_setprop_cell(fdt, bus_off, "ibm,pe-total-#msi", XICS_IRQS));
 
     /* Build the interrupt-map, this must matches what is done
      * in pci_spapr_map_irq
diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h
index 0d7673d..85e4c8a 100644
--- a/include/hw/ppc/xics.h
+++ b/include/hw/ppc/xics.h
@@ -152,6 +152,8 @@ struct ICSIRQState {
     uint8_t status;
 };
 
+#define XICS_IRQS               1024
+
 qemu_irq xics_get_qirq(XICSState *icp, int irq);
 void xics_set_irq_type(XICSState *icp, int irq, bool lsi);