[PULL 11/19] ppc/pnv: Introduce a LPC FW memory region attribute to map the PNOR

[David Gibson]

From: Cédric Le Goater <clg@kaod.org>

This to map the PNOR from the machine init handler directly and finish
the cleanup of the LPC model.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20210126171059.307867-8-clg@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/ppc/pnv.c         | 11 +++++++++++
 hw/ppc/pnv_lpc.c     |  7 -------
 include/hw/ppc/pnv.h |  1 +
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index e500c2e243..50810df838 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -871,6 +871,14 @@ static void pnv_init(MachineState *machine)
         pnv_ipmi_bt_init(pnv->isa_bus, pnv->bmc, 10);
     }
 
+    /*
+     * The PNOR is mapped on the LPC FW address space by the BMC.
+     * Since we can not reach the remote BMC machine with LPC memops,
+     * map it always for now.
+     */
+    memory_region_add_subregion(pnv->chips[0]->fw_mr, PNOR_SPI_OFFSET,
+                                &pnv->pnor->mmio);
+
     /*
      * OpenPOWER systems use a IPMI SEL Event message to notify the
      * host to powerdown
@@ -1150,6 +1158,7 @@ static void pnv_chip_power8_realize(DeviceState *dev, 
Error **errp)
     qdev_realize(DEVICE(&chip8->lpc), NULL, &error_fatal);
     pnv_xscom_add_subregion(chip, PNV_XSCOM_LPC_BASE, &chip8->lpc.xscom_regs);
 
+    chip->fw_mr = &chip8->lpc.isa_fw;
     chip->dt_isa_nodename = g_strdup_printf("/xscom@%" PRIx64 "/isa@%x",
                                             (uint64_t) PNV_XSCOM_BASE(chip),
                                             PNV_XSCOM_LPC_BASE);
@@ -1479,6 +1488,7 @@ static void pnv_chip_power9_realize(DeviceState *dev, 
Error **errp)
     memory_region_add_subregion(get_system_memory(), PNV9_LPCM_BASE(chip),
                                 &chip9->lpc.xscom_regs);
 
+    chip->fw_mr = &chip9->lpc.isa_fw;
     chip->dt_isa_nodename = g_strdup_printf("/lpcm-opb@%" PRIx64 "/lpc@0",
                                             (uint64_t) PNV9_LPCM_BASE(chip));
 
@@ -1592,6 +1602,7 @@ static void pnv_chip_power10_realize(DeviceState *dev, 
Error **errp)
     memory_region_add_subregion(get_system_memory(), PNV10_LPCM_BASE(chip),
                                 &chip10->lpc.xscom_regs);
 
+    chip->fw_mr = &chip10->lpc.isa_fw;
     chip->dt_isa_nodename = g_strdup_printf("/lpcm-opb@%" PRIx64 "/lpc@0",
                                             (uint64_t) PNV10_LPCM_BASE(chip));
 }
diff --git a/hw/ppc/pnv_lpc.c b/hw/ppc/pnv_lpc.c
index 11739e397b..bcbca3db97 100644
--- a/hw/ppc/pnv_lpc.c
+++ b/hw/ppc/pnv_lpc.c
@@ -824,7 +824,6 @@ ISABus *pnv_lpc_isa_create(PnvLpcController *lpc, bool 
use_cpld, Error **errp)
     ISABus *isa_bus;
     qemu_irq *irqs;
     qemu_irq_handler handler;
-    PnvMachineState *pnv = PNV_MACHINE(qdev_get_machine());
 
     /* let isa_bus_new() create its own bridge on SysBus otherwise
      * devices specified on the command line won't find the bus and
@@ -850,11 +849,5 @@ ISABus *pnv_lpc_isa_create(PnvLpcController *lpc, bool 
use_cpld, Error **errp)
 
     isa_bus_irqs(isa_bus, irqs);
 
-    /*
-     * TODO: Map PNOR on the LPC FW address space on demand ?
-     */
-    memory_region_add_subregion(&lpc->isa_fw, PNOR_SPI_OFFSET,
-                                &pnv->pnor->mmio);
-
     return isa_bus;
 }
diff --git a/include/hw/ppc/pnv.h b/include/hw/ppc/pnv.h
index ee7eda3e01..d69cee17b2 100644
--- a/include/hw/ppc/pnv.h
+++ b/include/hw/ppc/pnv.h
@@ -58,6 +58,7 @@ struct PnvChip {
     MemoryRegion xscom;
     AddressSpace xscom_as;
 
+    MemoryRegion *fw_mr;
     gchar        *dt_isa_nodename;
 };
 
-- 
2.29.2