Merge tag 'pull-loongarch-20241016' of https://gitlab.com/gaosong/qemu into staging

pull-loongarch-20241016

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* tag 'pull-loongarch-20241016' of https://gitlab.com/gaosong/qemu:
  hw/loongarch/fw_cfg: Build in common_ss[]
  hw/loongarch/virt: Remove unnecessary 'cpu.h' inclusion
  target/loongarch: Avoid bits shift exceeding width of bool type
  hw/loongarch/virt: Add FDT table support with acpi ged pm register
  acpi: ged: Add macro for acpi sleep control register

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

hw/acpi/generic_event_device.c

@@ -201,9 +201,9 @@ static void ged_regs_write(void *opaque, hwaddr addr, uint64_t data,
 
     switch (addr) {
     case ACPI_GED_REG_SLEEP_CTL:
-        slp_typ = (data >> 2) & 0x07;
-        slp_en  = (data >> 5) & 0x01;
-        if (slp_en && slp_typ == 5) {
+        slp_typ = (data >> ACPI_GED_SLP_TYP_POS) & ACPI_GED_SLP_TYP_MASK;
+        slp_en  = !!(data & ACPI_GED_SLP_EN);
+        if (slp_en && slp_typ == ACPI_GED_SLP_TYP_S5) {
             qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
         }
         return;

hw/loongarch/meson.build

@@ -1,8 +1,8 @@
 loongarch_ss = ss.source_set()
 loongarch_ss.add(files(
-    'fw_cfg.c',
     'boot.c',
 ))
+common_ss.add(when: 'CONFIG_LOONGARCH_VIRT', if_true: files('fw_cfg.c'))
 loongarch_ss.add(when: 'CONFIG_LOONGARCH_VIRT', if_true: files('virt.c'))
 loongarch_ss.add(when: 'CONFIG_ACPI', if_true: files('acpi-build.c'))
 

hw/loongarch/virt.c

@@ -280,6 +280,44 @@ static void fdt_add_rtc_node(LoongArchVirtMachineState *lvms,
     g_free(nodename);
 }
 
+static void fdt_add_ged_reset(LoongArchVirtMachineState *lvms)
+{
+    char *name;
+    uint32_t ged_handle;
+    MachineState *ms = MACHINE(lvms);
+    hwaddr base = VIRT_GED_REG_ADDR;
+    hwaddr size = ACPI_GED_REG_COUNT;
+
+    ged_handle = qemu_fdt_alloc_phandle(ms->fdt);
+    name = g_strdup_printf("/ged@%" PRIx64, base);
+    qemu_fdt_add_subnode(ms->fdt, name);
+    qemu_fdt_setprop_string(ms->fdt, name, "compatible", "syscon");
+    qemu_fdt_setprop_cells(ms->fdt, name, "reg", 0x0, base, 0x0, size);
+    /* 8 bit registers */
+    qemu_fdt_setprop_cell(ms->fdt, name, "reg-shift", 0);
+    qemu_fdt_setprop_cell(ms->fdt, name, "reg-io-width", 1);
+    qemu_fdt_setprop_cell(ms->fdt, name, "phandle", ged_handle);
+    ged_handle = qemu_fdt_get_phandle(ms->fdt, name);
+    g_free(name);
+
+    name = g_strdup_printf("/reboot");
+    qemu_fdt_add_subnode(ms->fdt, name);
+    qemu_fdt_setprop_string(ms->fdt, name, "compatible", "syscon-reboot");
+    qemu_fdt_setprop_cell(ms->fdt, name, "regmap", ged_handle);
+    qemu_fdt_setprop_cell(ms->fdt, name, "offset", ACPI_GED_REG_RESET);
+    qemu_fdt_setprop_cell(ms->fdt, name, "value", ACPI_GED_RESET_VALUE);
+    g_free(name);
+
+    name = g_strdup_printf("/poweroff");
+    qemu_fdt_add_subnode(ms->fdt, name);
+    qemu_fdt_setprop_string(ms->fdt, name, "compatible", "syscon-poweroff");
+    qemu_fdt_setprop_cell(ms->fdt, name, "regmap", ged_handle);
+    qemu_fdt_setprop_cell(ms->fdt, name, "offset", ACPI_GED_REG_SLEEP_CTL);
+    qemu_fdt_setprop_cell(ms->fdt, name, "value", ACPI_GED_SLP_EN |
+                          (ACPI_GED_SLP_TYP_S5 << ACPI_GED_SLP_TYP_POS));
+    g_free(name);
+}
+
 static void fdt_add_uart_node(LoongArchVirtMachineState *lvms,
                               uint32_t *pch_pic_phandle, hwaddr base,
                               int irq, bool chosen)
@@ -737,6 +775,7 @@ static void virt_devices_init(DeviceState *pch_pic,
                          qdev_get_gpio_in(pch_pic,
                          VIRT_RTC_IRQ - VIRT_GSI_BASE));
     fdt_add_rtc_node(lvms, pch_pic_phandle);
+    fdt_add_ged_reset(lvms);
 
     /* acpi ged */
     lvms->acpi_ged = create_acpi_ged(pch_pic, lvms);

include/hw/acpi/generic_event_device.h

@@ -81,8 +81,11 @@ OBJECT_DECLARE_SIMPLE_TYPE(AcpiGedState, ACPI_GED)
 /* ACPI_GED_REG_RESET value for reset*/
 #define ACPI_GED_RESET_VALUE       0x42
 
-/* ACPI_GED_REG_SLEEP_CTL.SLP_TYP value for S5 (aka poweroff) */
-#define ACPI_GED_SLP_TYP_S5        0x05
+/* [ACPI 5.0 Chapter 4.8.3.7] Sleep Control and Status Register */
+#define ACPI_GED_SLP_TYP_POS       0x2   /* SLP_TYPx Bit Offset */
+#define ACPI_GED_SLP_TYP_MASK      0x07  /* SLP_TYPx 3-bit mask */
+#define ACPI_GED_SLP_TYP_S5        0x05  /* System _S5 State (Soft Off) */
+#define ACPI_GED_SLP_EN            0x20  /* SLP_EN write-only bit */
 
 #define GED_DEVICE      "GED"
 #define AML_GED_EVT_REG "EREG"

include/hw/loongarch/virt.h

@@ -8,7 +8,6 @@
 #ifndef HW_LOONGARCH_H
 #define HW_LOONGARCH_H
 
-#include "target/loongarch/cpu.h"
 #include "hw/boards.h"
 #include "qemu/queue.h"
 #include "hw/block/flash.h"

target/loongarch/arch_dump.c

@@ -97,11 +97,7 @@ static int loongarch_write_elf64_fprpreg(WriteCoreDumpFunction f,
 
     loongarch_note_init(&note, s, "CORE", 5, NT_PRFPREG, sizeof(note.fpu));
     note.fpu.fcsr = cpu_to_dump64(s, env->fcsr0);
-
-    for (i = 0; i < 8; i++) {
-        note.fpu.fcc |= env->cf[i] << (8 * i);
-    }
-    note.fpu.fcc = cpu_to_dump64(s, note.fpu.fcc);
+    note.fpu.fcc = cpu_to_dump64(s, read_fcc(env));
 
     for (i = 0; i < 32; ++i) {
         note.fpu.fpr[i] = cpu_to_dump64(s, env->fpr[i].vreg.UD[0]);