Merge tag 'pull-loongarch-20250109' of https://gitlab.com/bibo-mao/qemu into staging

loongarch queue

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# gpg: Good signature from "bibo mao <[email protected]>" [unknown]
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# Primary key fingerprint: 7044 3A00 19C0 E97A 31C7  13C4 8E86 8FB7 A176 9D4C
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* tag 'pull-loongarch-20250109' of https://gitlab.com/bibo-mao/qemu:
  hw/intc/loongarch_extioi: Add irq routing support from physical id
  hw/intc/loongarch_extioi: Remove num-cpu property
  hw/intc/loongarch_extioi: Get cpu number from possible_cpu_arch_ids
  target/loongarch: Only support 64bit pte width
  hw/loongarch/boot: Support Linux raw boot image
  hw/core/loader: Use ssize_t for efi zboot unpacker

Signed-off-by: Stefan Hajnoczi <[email protected]>

Author: stefanhaRH

hw/arm/boot.c

@@ -857,7 +857,7 @@ static uint64_t load_aarch64_image(const char *filename, hwaddr mem_base,
     hwaddr kernel_load_offset = KERNEL64_LOAD_ADDR;
     uint64_t kernel_size = 0;
     uint8_t *buffer;
-    int size;
+    ssize_t size;
 
     /* On aarch64, it's the bootloader's job to uncompress the kernel. */
     size = load_image_gzipped_buffer(filename, LOAD_IMAGE_MAX_GUNZIP_BYTES,

hw/core/loader.c

@@ -886,11 +886,11 @@ struct linux_efi_zboot_header {
  *
  * If the image is not a Linux EFI zboot image, do nothing and return success.
  */
-ssize_t unpack_efi_zboot_image(uint8_t **buffer, int *size)
+ssize_t unpack_efi_zboot_image(uint8_t **buffer, ssize_t *size)
 {
     const struct linux_efi_zboot_header *header;
     uint8_t *data = NULL;
-    int ploff, plsize;
+    ssize_t ploff, plsize;
     ssize_t bytes;
 
     /* ignore if this is too small to be a EFI zboot image */

hw/intc/loongarch_extioi.c

@@ -15,6 +15,23 @@
 #include "hw/intc/loongarch_extioi.h"
 #include "trace.h"
 
+static int extioi_get_index_from_archid(LoongArchExtIOICommonState *s,
+                                        uint64_t arch_id)
+{
+    int i;
+
+    for (i = 0; i < s->num_cpu; i++) {
+        if (s->cpu[i].arch_id == arch_id) {
+            break;
+        }
+    }
+
+    if ((i < s->num_cpu) && s->cpu[i].cpu) {
+        return i;
+    }
+
+    return -1;
+}
 
 static void extioi_update_irq(LoongArchExtIOICommonState *s, int irq, int level)
 {
@@ -125,7 +142,7 @@ static inline void extioi_enable_irq(LoongArchExtIOICommonState *s, int index,\
 static inline void extioi_update_sw_coremap(LoongArchExtIOICommonState *s,
                                             int irq, uint64_t val, bool notify)
 {
-    int i, cpu;
+    int i, cpu, cpuid;
 
     /*
      * loongarch only support little endian,
@@ -134,12 +151,17 @@ static inline void extioi_update_sw_coremap(LoongArchExtIOICommonState *s,
     val = cpu_to_le64(val);
 
     for (i = 0; i < 4; i++) {
-        cpu = val & 0xff;
+        cpuid = val & 0xff;
         val = val >> 8;
 
         if (!(s->status & BIT(EXTIOI_ENABLE_CPU_ENCODE))) {
-            cpu = ctz32(cpu);
-            cpu = (cpu >= 4) ? 0 : cpu;
+            cpuid = ctz32(cpuid);
+            cpuid = (cpuid >= 4) ? 0 : cpuid;
+        }
+
+        cpu = extioi_get_index_from_archid(s, cpuid);
+        if (cpu < 0) {
+            continue;
         }
 
         if (s->sw_coremap[irq + i] == cpu) {
@@ -347,12 +369,6 @@ static void loongarch_extioi_realize(DeviceState *dev, Error **errp)
         s->status |= BIT(EXTIOI_ENABLE);
     }
 
-    s->cpu = g_new0(ExtIOICore, s->num_cpu);
-    if (s->cpu == NULL) {
-        error_setg(errp, "Memory allocation for ExtIOICore faile");
-        return;
-    }
-
     for (i = 0; i < s->num_cpu; i++) {
         for (pin = 0; pin < LS3A_INTC_IP; pin++) {
             qdev_init_gpio_out(dev, &s->cpu[i].parent_irq[pin], 1);

hw/intc/loongarch_extioi_common.c

@@ -13,11 +13,24 @@
 static void loongarch_extioi_common_realize(DeviceState *dev, Error **errp)
 {
     LoongArchExtIOICommonState *s = (LoongArchExtIOICommonState *)dev;
+    MachineState *machine = MACHINE(qdev_get_machine());
+    MachineClass *mc = MACHINE_GET_CLASS(machine);
+    const CPUArchIdList *id_list;
+    int i;
 
-    if (s->num_cpu == 0) {
-        error_setg(errp, "num-cpu must be at least 1");
+    assert(mc->possible_cpu_arch_ids);
+    id_list = mc->possible_cpu_arch_ids(machine);
+    s->num_cpu = id_list->len;
+    s->cpu = g_new0(ExtIOICore, s->num_cpu);
+    if (s->cpu == NULL) {
+        error_setg(errp, "Memory allocation for ExtIOICore faile");
         return;
     }
+
+    for (i = 0; i < s->num_cpu; i++) {
+        s->cpu[i].arch_id = id_list->cpus[i].arch_id;
+        s->cpu[i].cpu = CPU(id_list->cpus[i].cpu);
+    }
 }
 
 static int loongarch_extioi_common_pre_save(void *opaque)
@@ -82,7 +95,6 @@ static const VMStateDescription vmstate_loongarch_extioi = {
 };
 
 static const Property extioi_properties[] = {
-    DEFINE_PROP_UINT32("num-cpu", LoongArchExtIOICommonState, num_cpu, 1),
     DEFINE_PROP_BIT("has-virtualization-extension", LoongArchExtIOICommonState,
                     features, EXTIOI_HAS_VIRT_EXTENSION, 0),
 };

hw/loongarch/boot.c

@@ -15,6 +15,26 @@
 #include "system/reset.h"
 #include "system/qtest.h"
 
+/*
+ * Linux Image Format
+ * https://docs.kernel.org/arch/loongarch/booting.html
+ */
+#define LINUX_PE_MAGIC  0x818223cd
+#define MZ_MAGIC        0x5a4d /* "MZ" */
+
+struct loongarch_linux_hdr {
+    uint32_t mz_magic;
+    uint32_t res0;
+    uint64_t kernel_entry;
+    uint64_t kernel_size;
+    uint64_t load_offset;
+    uint64_t res1;
+    uint64_t res2;
+    uint64_t res3;
+    uint32_t linux_pe_magic;
+    uint32_t pe_header_offset;
+} QEMU_PACKED;
+
 struct memmap_entry *memmap_table;
 unsigned memmap_entries;
 
@@ -171,6 +191,50 @@ static uint64_t cpu_loongarch_virt_to_phys(void *opaque, uint64_t addr)
     return addr & MAKE_64BIT_MASK(0, TARGET_PHYS_ADDR_SPACE_BITS);
 }
 
+static int64_t load_loongarch_linux_image(const char *filename,
+                                          uint64_t *kernel_entry,
+                                          uint64_t *kernel_low,
+                                          uint64_t *kernel_high)
+{
+    gsize len;
+    ssize_t size;
+    uint8_t *buffer;
+    struct loongarch_linux_hdr *hdr;
+
+    /* Load as raw file otherwise */
+    if (!g_file_get_contents(filename, (char **)&buffer, &len, NULL)) {
+        return -1;
+    }
+    size = len;
+
+    /* Unpack the image if it is a EFI zboot image */
+    if (unpack_efi_zboot_image(&buffer, &size) < 0) {
+        g_free(buffer);
+        return -1;
+    }
+
+    hdr = (struct loongarch_linux_hdr *)buffer;
+
+    if (extract32(le32_to_cpu(hdr->mz_magic), 0, 16) != MZ_MAGIC ||
+        le32_to_cpu(hdr->linux_pe_magic) != LINUX_PE_MAGIC) {
+        g_free(buffer);
+        return -1;
+    }
+
+    /* Early kernel versions may have those fields in virtual address */
+    *kernel_entry = extract64(le64_to_cpu(hdr->kernel_entry),
+                              0, TARGET_PHYS_ADDR_SPACE_BITS);
+    *kernel_low = extract64(le64_to_cpu(hdr->load_offset),
+                            0, TARGET_PHYS_ADDR_SPACE_BITS);
+    *kernel_high = *kernel_low + size;
+
+    rom_add_blob_fixed(filename, buffer, size, *kernel_low);
+
+    g_free(buffer);
+
+    return size;
+}
+
 static int64_t load_kernel_info(struct loongarch_boot_info *info)
 {
     uint64_t kernel_entry, kernel_low, kernel_high;
@@ -181,6 +245,11 @@ static int64_t load_kernel_info(struct loongarch_boot_info *info)
                            &kernel_entry, &kernel_low,
                            &kernel_high, NULL, 0,
                            EM_LOONGARCH, 1, 0);
+    if (kernel_size < 0) {
+        kernel_size = load_loongarch_linux_image(info->kernel_filename,
+                                                 &kernel_entry, &kernel_low,
+                                                 &kernel_high);
+    }
 
     if (kernel_size < 0) {
         error_report("could not load kernel '%s': %s",

hw/loongarch/virt.c

@@ -921,7 +921,6 @@ static void virt_irq_init(LoongArchVirtMachineState *lvms)
 
     /* Create EXTIOI device */
     extioi = qdev_new(TYPE_LOONGARCH_EXTIOI);
-    qdev_prop_set_uint32(extioi, "num-cpu", ms->smp.cpus);
     if (virt_is_veiointc_enabled(lvms)) {
         qdev_prop_set_bit(extioi, "has-virtualization-extension", true);
     }

include/hw/intc/loongarch_extioi_common.h

@@ -65,6 +65,8 @@ typedef struct ExtIOICore {
     uint32_t coreisr[EXTIOI_IRQS_GROUP_COUNT];
     DECLARE_BITMAP(sw_isr[LS3A_INTC_IP], EXTIOI_IRQS);
     qemu_irq parent_irq[LS3A_INTC_IP];
+    uint64_t arch_id;
+    CPUState *cpu;
 } ExtIOICore;
 
 struct LoongArchExtIOICommonState {

include/hw/loader.h

@@ -101,7 +101,7 @@ ssize_t load_image_gzipped_buffer(const char *filename, uint64_t max_sz,
  * Returns the size of the decompressed payload if decompression was performed
  * successfully.
  */
-ssize_t unpack_efi_zboot_image(uint8_t **buffer, int *size);
+ssize_t unpack_efi_zboot_image(uint8_t **buffer, ssize_t *size);
 
 #define ELF_LOAD_FAILED       -1
 #define ELF_LOAD_NOT_ELF      -2

target/loongarch/helper.h

@@ -104,6 +104,7 @@ DEF_HELPER_2(csrwr_estat, i64, env, tl)
 DEF_HELPER_2(csrwr_asid, i64, env, tl)
 DEF_HELPER_2(csrwr_tcfg, i64, env, tl)
 DEF_HELPER_2(csrwr_ticlr, i64, env, tl)
+DEF_HELPER_2(csrwr_pwcl, i64, env, tl)
 DEF_HELPER_2(iocsrrd_b, i64, env, tl)
 DEF_HELPER_2(iocsrrd_h, i64, env, tl)
 DEF_HELPER_2(iocsrrd_w, i64, env, tl)

target/loongarch/tcg/csr_helper.c

@@ -6,6 +6,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/log.h"
 #include "qemu/main-loop.h"
 #include "cpu.h"
 #include "internals.h"
@@ -95,3 +96,23 @@ target_ulong helper_csrwr_ticlr(CPULoongArchState *env, target_ulong val)
     }
     return old_v;
 }
+
+target_ulong helper_csrwr_pwcl(CPULoongArchState *env, target_ulong val)
+{
+    int shift;
+    int64_t old_v = env->CSR_PWCL;
+
+    /*
+     * The real hardware only supports 64bit PTE width now, 128bit or others
+     * treated as illegal.
+     */
+    shift = FIELD_EX64(val, CSR_PWCL, PTEWIDTH);
+    if (shift) {
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "Attempted set pte width with %d bit\n", 64 << shift);
+        val = FIELD_DP64(val, CSR_PWCL, PTEWIDTH, 0);
+    }
+
+    env->CSR_PWCL = val;
+    return old_v;
+}