[PULL 21/23] ppc/pnv: Remove LSI on the PCIE host bridge

[Daniel Henrique Barboza]

From: Frederic Barrat <fbarrat@linux.ibm.com>

The phb3/phb4/phb5 root ports inherit from the default PCIE root port
implementation, which requests a LSI interrupt (#INTA). On real
hardware (POWER8/POWER9/POWER10), there is no such LSI. This patch
corrects it so that it matches the hardware.

As a consequence, the device tree previously generated was bogus, as
the root bridge LSI was not properly mapped. On some
implementation (powernv9), it was leading to inconsistent interrupt
controller (xive) data. With this patch, it is now clean.

Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220408131303.147840-3-fbarrat@linux.ibm.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
---
 hw/pci-host/pnv_phb3.c | 1 +
 hw/pci-host/pnv_phb4.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/hw/pci-host/pnv_phb3.c b/hw/pci-host/pnv_phb3.c
index 4e68ad4f03..3f03467dde 100644
--- a/hw/pci-host/pnv_phb3.c
+++ b/hw/pci-host/pnv_phb3.c
@@ -1161,6 +1161,7 @@ static void pnv_phb3_root_port_realize(DeviceState *dev, 
Error **errp)
         error_propagate(errp, local_err);
         return;
     }
+    pci_config_set_interrupt_pin(pci->config, 0);
 }
 
 static void pnv_phb3_root_port_class_init(ObjectClass *klass, void *data)
diff --git a/hw/pci-host/pnv_phb4.c b/hw/pci-host/pnv_phb4.c
index 3c4c2dace0..13ba9e45d8 100644
--- a/hw/pci-host/pnv_phb4.c
+++ b/hw/pci-host/pnv_phb4.c
@@ -1771,6 +1771,7 @@ static void pnv_phb4_root_port_reset(DeviceState *dev)
     pci_set_word(conf + PCI_PREF_MEMORY_LIMIT, 0xfff1);
     pci_set_long(conf + PCI_PREF_BASE_UPPER32, 0x1); /* Hack */
     pci_set_long(conf + PCI_PREF_LIMIT_UPPER32, 0xffffffff);
+    pci_config_set_interrupt_pin(conf, 0);
 }
 
 static void pnv_phb4_root_port_realize(DeviceState *dev, Error **errp)
-- 
2.35.1