[PATCH v5 9/9] pnv/phb5: Mask off LSI Source-ID based on number of interrupts

[Saif Abrar <saif.abrar@linux.ibm.com>]

From: Saif Abrar <saif.abrar@linux.vnet.ibm.com>

Add a method to reset the value of LSI Source-ID.
Mask off LSI source-id based on number of interrupts in the big/small PHB.

Signed-off-by: Saif Abrar <saif.abrar@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Jishnu Warrier <Jishnu.Warrier@ibm.com>
---
v3: Updates for coding guidelines.
v2: Introduced method pnv_phb4_xsrc_reset().


 hw/pci-host/pnv_phb4.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/hw/pci-host/pnv_phb4.c b/hw/pci-host/pnv_phb4.c
index 91b2064113..08c96aef7d 100644
--- a/hw/pci-host/pnv_phb4.c
+++ b/hw/pci-host/pnv_phb4.c
@@ -491,6 +491,7 @@ static void pnv_phb4_update_xsrc(PnvPHB4 *phb)
 
     lsi_base = GETFIELD(PHB_LSI_SRC_ID, phb->regs[PHB_LSI_SOURCE_ID >> 3]);
     lsi_base <<= 3;
+    lsi_base &= (xsrc->nr_irqs - 1);
 
     /* TODO: handle reset values of PHB_LSI_SRC_ID */
     if (!lsi_base) {
@@ -1943,6 +1944,12 @@ static void pnv_phb4_ro_mask_init(PnvPHB4Class *phb4c)
     /* TODO: Add more RO-masks as regs are implemented in the model */
 }
 
+static void pnv_phb4_xsrc_reset(PnvPHB4 *phb)
+{
+    phb->regs[PHB_LSI_SOURCE_ID >> 3] = PPC_BITMASK(4, 12);
+    pnv_phb4_update_xsrc(phb);
+}
+
 static void pnv_phb4_err_reg_reset(PnvPHB4 *phb)
 {
     STICKY_RST(PHB_ERR_STATUS,       0, PPC_BITMASK(0, 33));
@@ -1999,10 +2006,11 @@ static void pnv_phb4_reset(Object *obj, ResetType type)
     PnvPHB4 *phb = PNV_PHB4(obj);
 
     pnv_phb4_pbl_core_reset(phb);
+
+    pnv_phb4_xsrc_reset(phb);
     pnv_phb4_err_reg_reset(phb);
     pnv_phb4_pcie_stack_reg_reset(phb);
     pnv_phb4_regb_err_reg_reset(phb);
-    phb->regs[PHB_PCIE_CRESET >> 3] = 0xE000000000000000;
 }
 
 static void pnv_phb4_instance_init(Object *obj)
@@ -2076,8 +2084,6 @@ static void pnv_phb4_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    pnv_phb4_update_xsrc(phb);
-
     phb->qirqs = qemu_allocate_irqs(xive_source_set_irq, xsrc, xsrc->nr_irqs);
 
     pnv_phb4_xscom_realize(phb);
-- 
2.52.0