Merge tag 'hppa-fixes-8.2-pull-request' of https://github.com/hdeller/qemu-hppa into staging

target/hppa qemu v8.2 regression fixes

There were some regressions introduced with Qemu v8.2 on the hppa/hppa64
target, e.g.:

- 32-bit HP-UX crashes on B160L (32-bit) machine
- NetBSD boot failure due to power button in page zero
- NetBSD FPU detection failure
- OpenBSD 7.4 boot failure

This patch series fixes those known regressions and additionally:

- allows usage of the max. 3840MB of memory (instead of 3GB),
- adds support for the qemu --nodefaults option (to debug other devices)

This patch set will not fix those known (non-regression) bugs:
- HP-UX and NetBSD still fail to boot on the new 64-bit C3700 machine
- Linux kernel will still fail to boot on C3700 as long as kernel modules are used.

Changes v2->v3:
- Added comment about Figures H-10 and H-11 in the parisc2.0 spec
  in patch which calculate PDC address translation if PSW.W=0
- Introduce and use hppa_set_ior_and_isr()
- Use drive_get_max_bus(IF_SCSI), nd_table[] and serial_hd() to check
  if default devices should be created
- Added Tested-by and Reviewed-by tags

Changes v1->v2:
- fix OpenBSD boot with SeaBIOS v15 instead of v14
- commit message enhancements suggested by BALATON Zoltan
- use uint64_t for ram_max in patch #1

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# gpg: Signature made Sat 13 Jan 2024 05:57:17 GMT
# gpg:                using EDDSA key BCE9123E1AD29F07C049BBDEF712B510A23A0F5F
# gpg: Good signature from "Helge Deller <deller@gmx.de>" [unknown]
# gpg:                 aka "Helge Deller <deller@kernel.org>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 4544 8228 2CD9 10DB EF3D  25F8 3E5F 3D04 A7A2 4603
#      Subkey fingerprint: BCE9 123E 1AD2 9F07 C049  BBDE F712 B510 A23A 0F5F

* tag 'hppa-fixes-8.2-pull-request' of https://github.com/hdeller/qemu-hppa:
  target/hppa: Update SeaBIOS-hppa to version 15
  target/hppa: Fix IOR and ISR on error in probe
  target/hppa: Fix IOR and ISR on unaligned access trap
  target/hppa: Export function hppa_set_ior_and_isr()
  target/hppa: Avoid accessing %gr0 when raising exception
  hw/hppa: Move software power button address back into PDC
  target/hppa: Fix PDC address translation on PA2.0 with PSW.W=0
  hw/pci-host/astro: Add missing astro & elroy registers for NetBSD
  hw/hppa/machine: Disable default devices with --nodefaults option
  hw/hppa/machine: Allow up to 3840 MB total memory

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 17 insertions, 11 deletions

diff --git a/hw/hppa/machine.c b/hw/hppa/machine.c
index c8da7c18d5..9e611620cc 100644
--- a/hw/hppa/machine.c
+++ b/hw/hppa/machine.c
@@ -36,8 +36,8 @@
 
 #define MIN_SEABIOS_HPPA_VERSION 12 /* require at least this fw version */
 
-/* Power button address at &PAGE0->pad[4] */
-#define HPA_POWER_BUTTON (0x40 + 4 * sizeof(uint32_t))
+#define HPA_POWER_BUTTON        (FIRMWARE_END - 0x10)
+static hwaddr soft_power_reg;
 
 #define enable_lasi_lan()       0
 
@@ -45,7 +45,6 @@ static DeviceState *lasi_dev;
 
 static void hppa_powerdown_req(Notifier *n, void *opaque)
 {
-    hwaddr soft_power_reg = HPA_POWER_BUTTON;
     uint32_t val;
 
     val = ldl_be_phys(&address_space_memory, soft_power_reg);
@@ -221,7 +220,7 @@ static FWCfgState *create_fw_cfg(MachineState *ms, PCIBus *pci_bus,
     fw_cfg_add_file(fw_cfg, "/etc/hppa/machine",
                     g_memdup(mc->name, len), len);
 
-    val = cpu_to_le64(HPA_POWER_BUTTON);
+    val = cpu_to_le64(soft_power_reg);
     fw_cfg_add_file(fw_cfg, "/etc/hppa/power-button-addr",
                     g_memdup(&val, sizeof(val)), sizeof(val));
 
@@ -276,6 +275,7 @@ static TranslateFn *machine_HP_common_init_cpus(MachineState *machine)
     unsigned int smp_cpus = machine->smp.cpus;
     TranslateFn *translate;
     MemoryRegion *cpu_region;
+    uint64_t ram_max;
 
     /* Create CPUs.  */
     for (unsigned int i = 0; i < smp_cpus; i++) {
@@ -288,10 +288,14 @@ static TranslateFn *machine_HP_common_init_cpus(MachineState *machine)
      */
     if (hppa_is_pa20(&cpu[0]->env)) {
         translate = translate_pa20;
+        ram_max = 0xf0000000;      /* 3.75 GB (limited by 32-bit firmware) */
     } else {
         translate = translate_pa10;
+        ram_max = 0xf0000000;      /* 3.75 GB (32-bit CPU) */
     }
 
+    soft_power_reg = translate(NULL, HPA_POWER_BUTTON);
+
     for (unsigned int i = 0; i < smp_cpus; i++) {
         g_autofree char *name = g_strdup_printf("cpu%u-io-eir", i);
 
@@ -311,9 +315,9 @@ static TranslateFn *machine_HP_common_init_cpus(MachineState *machine)
                                 cpu_region);
 
     /* Main memory region. */
-    if (machine->ram_size > 3 * GiB) {
-        error_report("RAM size is currently restricted to 3GB");
-        exit(EXIT_FAILURE);
+    if (machine->ram_size > ram_max) {
+        info_report("Max RAM size limited to %" PRIu64 " MB", ram_max / MiB);
+        machine->ram_size = ram_max;
     }
     memory_region_add_subregion_overlap(addr_space, 0, machine->ram, -1);
 
@@ -343,8 +347,10 @@ static void machine_HP_common_init_tail(MachineState *machine, PCIBus *pci_bus,
     SysBusDevice *s;
 
     /* SCSI disk setup. */
-    dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a"));
-    lsi53c8xx_handle_legacy_cmdline(dev);
+    if (drive_get_max_bus(IF_SCSI) >= 0) {
+        dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a"));
+        lsi53c8xx_handle_legacy_cmdline(dev);
+    }
 
     /* Graphics setup. */
     if (machine->enable_graphics && vga_interface_type != VGA_NONE) {
@@ -357,7 +363,7 @@ static void machine_HP_common_init_tail(MachineState *machine, PCIBus *pci_bus,
     }
 
     /* Network setup. */
-    if (enable_lasi_lan()) {
+    if (nd_table[0].used && enable_lasi_lan()) {
         lasi_82596_init(addr_space, translate(NULL, LASI_LAN_HPA),
                         qdev_get_gpio_in(lasi_dev, LASI_IRQ_LAN_HPA));
     }
@@ -382,7 +388,7 @@ static void machine_HP_common_init_tail(MachineState *machine, PCIBus *pci_bus,
     pci_set_word(&pci_dev->config[PCI_SUBSYSTEM_ID], 0x1227); /* Powerbar */
 
     /* create a second serial PCI card when running Astro */
-    if (!lasi_dev) {
+    if (serial_hd(1) && !lasi_dev) {
         pci_dev = pci_new(-1, "pci-serial-4x");
         qdev_prop_set_chr(DEVICE(pci_dev), "chardev1", serial_hd(1));
         qdev_prop_set_chr(DEVICE(pci_dev), "chardev2", serial_hd(2));