arm/boot: split load_dtb() from arm_load_kernel()
load_dtb() depends on arm_load_kernel() to figure out place
in RAM where it should be loaded, but it's not required for
arm_load_kernel() to work. Sometimes it's neccesary for
devices added with -device/device_add to be enumerated in
DTB as well, which's lead to [1] and surrounding commits to
add 2 more machine_done notifiers with non obvious ordering
to make dynamic sysbus devices initialization happen in
the right order.
However instead of moving whole arm_load_kernel() in to
machine_done, it's sufficient to move only load_dtb() into
virt_machine_done() notifier and remove ArmLoadKernelNotifier/
/PlatformBusFDTNotifierParams notifiers, which saves us ~90LOC
and simplifies code flow quite a bit.
Later would allow to consolidate DTB generation within one
function for 'mach-virt' board and make it reentrant so it
could generate updated DTB in device hotplug secenarios.
While at it rename load_dtb() to arm_load_dtb() since it's
public now.
Add additional field skip_dtb_autoload to struct arm_boot_info
to allow manual DTB load later in mach-virt and to avoid touching
all other boards to explicitly call arm_load_dtb().
1) (ac9d32e
hw/arm/boot: arm_load_kernel implemented as a machine init done notifier)
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Message-id: 1525691524-32265-4-git-send-email-imammedo@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
parent
a3fc839635
commit
3b77f6c353
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@ -36,8 +36,8 @@
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#define ARM64_TEXT_OFFSET_OFFSET 8
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#define ARM64_MAGIC_OFFSET 56
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static AddressSpace *arm_boot_address_space(ARMCPU *cpu,
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const struct arm_boot_info *info)
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AddressSpace *arm_boot_address_space(ARMCPU *cpu,
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const struct arm_boot_info *info)
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{
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/* Return the address space to use for bootloader reads and writes.
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* We prefer the secure address space if the CPU has it and we're
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@ -486,29 +486,8 @@ static void fdt_add_psci_node(void *fdt)
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qemu_fdt_setprop_cell(fdt, "/psci", "migrate", migrate_fn);
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}
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/**
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* load_dtb() - load a device tree binary image into memory
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* @addr: the address to load the image at
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* @binfo: struct describing the boot environment
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* @addr_limit: upper limit of the available memory area at @addr
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* @as: address space to load image to
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*
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* Load a device tree supplied by the machine or by the user with the
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* '-dtb' command line option, and put it at offset @addr in target
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* memory.
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*
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* If @addr_limit contains a meaningful value (i.e., it is strictly greater
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* than @addr), the device tree is only loaded if its size does not exceed
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* the limit.
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*
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* Returns: the size of the device tree image on success,
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* 0 if the image size exceeds the limit,
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* -1 on errors.
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*
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* Note: Must not be called unless have_dtb(binfo) is true.
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*/
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static int load_dtb(hwaddr addr, const struct arm_boot_info *binfo,
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hwaddr addr_limit, AddressSpace *as)
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int arm_load_dtb(hwaddr addr, const struct arm_boot_info *binfo,
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hwaddr addr_limit, AddressSpace *as)
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{
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void *fdt = NULL;
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int size, rc;
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@ -935,7 +914,7 @@ static uint64_t load_aarch64_image(const char *filename, hwaddr mem_base,
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return size;
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}
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static void arm_load_kernel_notify(Notifier *notifier, void *data)
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void arm_load_kernel(ARMCPU *cpu, struct arm_boot_info *info)
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{
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CPUState *cs;
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int kernel_size;
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@ -945,11 +924,6 @@ static void arm_load_kernel_notify(Notifier *notifier, void *data)
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int elf_machine;
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hwaddr entry;
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static const ARMInsnFixup *primary_loader;
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ArmLoadKernelNotifier *n = DO_UPCAST(ArmLoadKernelNotifier,
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notifier, notifier);
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ARMCPU *cpu = n->cpu;
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struct arm_boot_info *info =
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container_of(n, struct arm_boot_info, load_kernel_notifier);
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AddressSpace *as = arm_boot_address_space(cpu, info);
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/* The board code is not supposed to set secure_board_setup unless
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@ -959,6 +933,7 @@ static void arm_load_kernel_notify(Notifier *notifier, void *data)
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assert(!(info->secure_board_setup && kvm_enabled()));
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info->dtb_filename = qemu_opt_get(qemu_get_machine_opts(), "dtb");
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info->dtb_limit = 0;
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/* Load the kernel. */
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if (!info->kernel_filename || info->firmware_loaded) {
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@ -968,9 +943,7 @@ static void arm_load_kernel_notify(Notifier *notifier, void *data)
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* the kernel is supposed to be loaded by the bootloader), copy the
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* DTB to the base of RAM for the bootloader to pick up.
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*/
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if (load_dtb(info->loader_start, info, 0, as) < 0) {
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exit(1);
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}
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info->dtb_start = info->loader_start;
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}
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if (info->kernel_filename) {
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@ -1050,15 +1023,14 @@ static void arm_load_kernel_notify(Notifier *notifier, void *data)
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*/
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if (elf_low_addr > info->loader_start
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|| elf_high_addr < info->loader_start) {
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/* Pass elf_low_addr as address limit to load_dtb if it may be
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/* Set elf_low_addr as address limit for arm_load_dtb if it may be
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* pointing into RAM, otherwise pass '0' (no limit)
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*/
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if (elf_low_addr < info->loader_start) {
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elf_low_addr = 0;
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}
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if (load_dtb(info->loader_start, info, elf_low_addr, as) < 0) {
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exit(1);
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}
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info->dtb_start = info->loader_start;
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info->dtb_limit = elf_low_addr;
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}
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}
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entry = elf_entry;
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@ -1116,7 +1088,6 @@ static void arm_load_kernel_notify(Notifier *notifier, void *data)
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*/
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if (have_dtb(info)) {
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hwaddr align;
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hwaddr dtb_start;
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if (elf_machine == EM_AARCH64) {
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/*
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@ -1136,11 +1107,9 @@ static void arm_load_kernel_notify(Notifier *notifier, void *data)
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}
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/* Place the DTB after the initrd in memory with alignment. */
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dtb_start = QEMU_ALIGN_UP(info->initrd_start + initrd_size, align);
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if (load_dtb(dtb_start, info, 0, as) < 0) {
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exit(1);
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}
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fixupcontext[FIXUP_ARGPTR] = dtb_start;
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info->dtb_start = QEMU_ALIGN_UP(info->initrd_start + initrd_size,
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align);
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fixupcontext[FIXUP_ARGPTR] = info->dtb_start;
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} else {
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fixupcontext[FIXUP_ARGPTR] = info->loader_start + KERNEL_ARGS_ADDR;
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if (info->ram_size >= (1ULL << 32)) {
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@ -1173,15 +1142,6 @@ static void arm_load_kernel_notify(Notifier *notifier, void *data)
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for (cs = first_cpu; cs; cs = CPU_NEXT(cs)) {
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ARM_CPU(cs)->env.boot_info = info;
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}
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}
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void arm_load_kernel(ARMCPU *cpu, struct arm_boot_info *info)
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{
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CPUState *cs;
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info->load_kernel_notifier.cpu = cpu;
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info->load_kernel_notifier.notifier.notify = arm_load_kernel_notify;
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qemu_add_machine_init_done_notifier(&info->load_kernel_notifier.notifier);
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/* CPU objects (unlike devices) are not automatically reset on system
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* reset, so we must always register a handler to do so. If we're
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for (cs = first_cpu; cs; cs = CPU_NEXT(cs)) {
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qemu_register_reset(do_cpu_reset, ARM_CPU(cs));
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}
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if (!info->skip_dtb_autoload && have_dtb(info)) {
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if (arm_load_dtb(info->dtb_start, info, info->dtb_limit, as) < 0) {
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exit(1);
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}
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}
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}
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static const TypeInfo arm_linux_boot_if_info = {
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@ -49,15 +49,6 @@ typedef struct PlatformBusFDTData {
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PlatformBusDevice *pbus;
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} PlatformBusFDTData;
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/*
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* struct used when calling the machine init done notifier
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* that constructs the fdt nodes of platform bus devices
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*/
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typedef struct PlatformBusFDTNotifierParams {
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Notifier notifier;
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ARMPlatformBusFDTParams *fdt_params;
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} PlatformBusFDTNotifierParams;
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/* struct that associates a device type name and a node creation function */
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typedef struct NodeCreationPair {
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const char *typename;
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exit(1);
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}
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/**
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* add_all_platform_bus_fdt_nodes - create all the platform bus nodes
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*
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* builds the parent platform bus node and all the nodes of dynamic
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* sysbus devices attached to it.
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*/
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static void add_all_platform_bus_fdt_nodes(ARMPlatformBusFDTParams *fdt_params)
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void platform_bus_add_all_fdt_nodes(void *fdt, const char *intc, hwaddr addr,
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hwaddr bus_size, int irq_start)
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{
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const char platcomp[] = "qemu,platform\0simple-bus";
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PlatformBusDevice *pbus;
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DeviceState *dev;
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gchar *node;
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uint64_t addr, size;
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int irq_start, dtb_size;
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struct arm_boot_info *info = fdt_params->binfo;
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const ARMPlatformBusSystemParams *params = fdt_params->system_params;
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const char *intc = fdt_params->intc;
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void *fdt = info->get_dtb(info, &dtb_size);
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/*
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* If the user provided a dtb, we assume the dynamic sysbus nodes
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* already are integrated there. This corresponds to a use case where
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* the dynamic sysbus nodes are complex and their generation is not yet
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* supported. In that case the user can take charge of the guest dt
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* while qemu takes charge of the qom stuff.
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*/
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if (info->dtb_filename) {
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return;
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}
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assert(fdt);
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node = g_strdup_printf("/platform@%"PRIx64, params->platform_bus_base);
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addr = params->platform_bus_base;
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size = params->platform_bus_size;
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irq_start = params->platform_bus_first_irq;
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node = g_strdup_printf("/platform@%"PRIx64, addr);
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/* Create a /platform node that we can put all devices into */
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qemu_fdt_add_subnode(fdt, node);
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*/
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qemu_fdt_setprop_cells(fdt, node, "#size-cells", 1);
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qemu_fdt_setprop_cells(fdt, node, "#address-cells", 1);
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qemu_fdt_setprop_cells(fdt, node, "ranges", 0, addr >> 32, addr, size);
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qemu_fdt_setprop_cells(fdt, node, "ranges", 0, addr >> 32, addr, bus_size);
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qemu_fdt_setprop_phandle(fdt, node, "interrupt-parent", intc);
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@ -518,22 +484,3 @@ static void add_all_platform_bus_fdt_nodes(ARMPlatformBusFDTParams *fdt_params)
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g_free(node);
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}
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static void platform_bus_fdt_notify(Notifier *notifier, void *data)
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{
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PlatformBusFDTNotifierParams *p = DO_UPCAST(PlatformBusFDTNotifierParams,
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notifier, notifier);
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add_all_platform_bus_fdt_nodes(p->fdt_params);
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g_free(p->fdt_params);
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g_free(p);
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}
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void arm_register_platform_bus_fdt_creator(ARMPlatformBusFDTParams *fdt_params)
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{
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PlatformBusFDTNotifierParams *p = g_new(PlatformBusFDTNotifierParams, 1);
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p->fdt_params = fdt_params;
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p->notifier.notify = platform_bus_fdt_notify;
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qemu_add_machine_init_done_notifier(&p->notifier);
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}
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@ -94,8 +94,6 @@
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#define PLATFORM_BUS_NUM_IRQS 64
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static ARMPlatformBusSystemParams platform_bus_params;
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/* RAM limit in GB. Since VIRT_MEM starts at the 1GB mark, this means
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* RAM can go up to the 256GB mark, leaving 256GB of the physical
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* address space unallocated and free for future use between 256G and 512G.
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DeviceState *dev;
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SysBusDevice *s;
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int i;
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ARMPlatformBusFDTParams *fdt_params = g_new(ARMPlatformBusFDTParams, 1);
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MemoryRegion *sysmem = get_system_memory();
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platform_bus_params.platform_bus_base = vms->memmap[VIRT_PLATFORM_BUS].base;
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platform_bus_params.platform_bus_size = vms->memmap[VIRT_PLATFORM_BUS].size;
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platform_bus_params.platform_bus_first_irq = vms->irqmap[VIRT_PLATFORM_BUS];
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platform_bus_params.platform_bus_num_irqs = PLATFORM_BUS_NUM_IRQS;
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fdt_params->system_params = &platform_bus_params;
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fdt_params->binfo = &vms->bootinfo;
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fdt_params->intc = "/intc";
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/*
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* register a machine init done notifier that creates the device tree
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* nodes of the platform bus and its children dynamic sysbus devices
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*/
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arm_register_platform_bus_fdt_creator(fdt_params);
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dev = qdev_create(NULL, TYPE_PLATFORM_BUS_DEVICE);
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dev->id = TYPE_PLATFORM_BUS_DEVICE;
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qdev_prop_set_uint32(dev, "num_irqs",
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platform_bus_params.platform_bus_num_irqs);
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qdev_prop_set_uint32(dev, "mmio_size",
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platform_bus_params.platform_bus_size);
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qdev_prop_set_uint32(dev, "num_irqs", PLATFORM_BUS_NUM_IRQS);
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qdev_prop_set_uint32(dev, "mmio_size", vms->memmap[VIRT_PLATFORM_BUS].size);
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qdev_init_nofail(dev);
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vms->platform_bus_dev = dev;
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s = SYS_BUS_DEVICE(dev);
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for (i = 0; i < platform_bus_params.platform_bus_num_irqs; i++) {
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int irqn = platform_bus_params.platform_bus_first_irq + i;
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s = SYS_BUS_DEVICE(dev);
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for (i = 0; i < PLATFORM_BUS_NUM_IRQS; i++) {
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int irqn = vms->irqmap[VIRT_PLATFORM_BUS] + i;
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sysbus_connect_irq(s, i, pic[irqn]);
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}
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memory_region_add_subregion(sysmem,
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platform_bus_params.platform_bus_base,
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vms->memmap[VIRT_PLATFORM_BUS].base,
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sysbus_mmio_get_region(s, 0));
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}
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@ -1230,6 +1211,26 @@ void virt_machine_done(Notifier *notifier, void *data)
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{
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VirtMachineState *vms = container_of(notifier, VirtMachineState,
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machine_done);
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ARMCPU *cpu = ARM_CPU(first_cpu);
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struct arm_boot_info *info = &vms->bootinfo;
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AddressSpace *as = arm_boot_address_space(cpu, info);
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/*
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* If the user provided a dtb, we assume the dynamic sysbus nodes
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* already are integrated there. This corresponds to a use case where
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* the dynamic sysbus nodes are complex and their generation is not yet
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* supported. In that case the user can take charge of the guest dt
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* while qemu takes charge of the qom stuff.
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*/
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if (info->dtb_filename == NULL) {
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platform_bus_add_all_fdt_nodes(vms->fdt, "/intc",
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vms->memmap[VIRT_PLATFORM_BUS].base,
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vms->memmap[VIRT_PLATFORM_BUS].size,
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vms->irqmap[VIRT_PLATFORM_BUS]);
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}
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if (arm_load_dtb(info->dtb_start, info, info->dtb_limit, as) < 0) {
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exit(1);
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}
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virt_acpi_setup(vms);
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virt_build_smbios(vms);
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@ -1457,8 +1458,7 @@ static void machvirt_init(MachineState *machine)
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vms->fw_cfg = create_fw_cfg(vms, &address_space_memory);
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rom_set_fw(vms->fw_cfg);
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vms->machine_done.notify = virt_machine_done;
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qemu_add_machine_init_done_notifier(&vms->machine_done);
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create_platform_bus(vms, pic);
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vms->bootinfo.ram_size = machine->ram_size;
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vms->bootinfo.kernel_filename = machine->kernel_filename;
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@ -1468,16 +1468,12 @@ static void machvirt_init(MachineState *machine)
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vms->bootinfo.board_id = -1;
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vms->bootinfo.loader_start = vms->memmap[VIRT_MEM].base;
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vms->bootinfo.get_dtb = machvirt_dtb;
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vms->bootinfo.skip_dtb_autoload = true;
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vms->bootinfo.firmware_loaded = firmware_loaded;
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arm_load_kernel(ARM_CPU(first_cpu), &vms->bootinfo);
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/*
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* arm_load_kernel machine init done notifier registration must
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* happen before the platform_bus_create call. In this latter,
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* another notifier is registered which adds platform bus nodes.
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* Notifiers are executed in registration reverse order.
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*/
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create_platform_bus(vms, pic);
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vms->machine_done.notify = virt_machine_done;
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qemu_add_machine_init_done_notifier(&vms->machine_done);
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}
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static bool virt_get_secure(Object *obj, Error **errp)
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|
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|
@ -39,15 +39,6 @@ DeviceState *armv7m_init(MemoryRegion *system_memory, int mem_size, int num_irq,
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*/
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void armv7m_load_kernel(ARMCPU *cpu, const char *kernel_filename, int mem_size);
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/*
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* struct used as a parameter of the arm_load_kernel machine init
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* done notifier
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*/
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typedef struct {
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Notifier notifier; /* actual notifier */
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ARMCPU *cpu; /* handle to the first cpu object */
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} ArmLoadKernelNotifier;
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/* arm_boot.c */
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struct arm_boot_info {
|
||||
uint64_t ram_size;
|
||||
|
@ -56,6 +47,13 @@ struct arm_boot_info {
|
|||
const char *initrd_filename;
|
||||
const char *dtb_filename;
|
||||
hwaddr loader_start;
|
||||
hwaddr dtb_start;
|
||||
hwaddr dtb_limit;
|
||||
/* If set to True, arm_load_kernel() will not load DTB.
|
||||
* It allows board to load DTB manually later.
|
||||
* (default: False)
|
||||
*/
|
||||
bool skip_dtb_autoload;
|
||||
/* multicore boards that use the default secondary core boot functions
|
||||
* need to put the address of the secondary boot code, the boot reg,
|
||||
* and the GIC address in the next 3 values, respectively. boards that
|
||||
|
@ -94,8 +92,6 @@ struct arm_boot_info {
|
|||
* the user it should implement this hook.
|
||||
*/
|
||||
void (*modify_dtb)(const struct arm_boot_info *info, void *fdt);
|
||||
/* machine init done notifier executing arm_load_dtb */
|
||||
ArmLoadKernelNotifier load_kernel_notifier;
|
||||
/* Used internally by arm_boot.c */
|
||||
int is_linux;
|
||||
hwaddr initrd_start;
|
||||
|
@ -143,6 +139,33 @@ struct arm_boot_info {
|
|||
*/
|
||||
void arm_load_kernel(ARMCPU *cpu, struct arm_boot_info *info);
|
||||
|
||||
AddressSpace *arm_boot_address_space(ARMCPU *cpu,
|
||||
const struct arm_boot_info *info);
|
||||
|
||||
/**
|
||||
* arm_load_dtb() - load a device tree binary image into memory
|
||||
* @addr: the address to load the image at
|
||||
* @binfo: struct describing the boot environment
|
||||
* @addr_limit: upper limit of the available memory area at @addr
|
||||
* @as: address space to load image to
|
||||
*
|
||||
* Load a device tree supplied by the machine or by the user with the
|
||||
* '-dtb' command line option, and put it at offset @addr in target
|
||||
* memory.
|
||||
*
|
||||
* If @addr_limit contains a meaningful value (i.e., it is strictly greater
|
||||
* than @addr), the device tree is only loaded if its size does not exceed
|
||||
* the limit.
|
||||
*
|
||||
* Returns: the size of the device tree image on success,
|
||||
* 0 if the image size exceeds the limit,
|
||||
* -1 on errors.
|
||||
*
|
||||
* Note: Must not be called unless have_dtb(binfo) is true.
|
||||
*/
|
||||
int arm_load_dtb(hwaddr addr, const struct arm_boot_info *binfo,
|
||||
hwaddr addr_limit, AddressSpace *as);
|
||||
|
||||
/* Write a secure board setup routine with a dummy handler for SMCs */
|
||||
void arm_write_secure_board_setup_dummy_smc(ARMCPU *cpu,
|
||||
const struct arm_boot_info *info,
|
||||
|
|
|
@ -24,37 +24,14 @@
|
|||
#ifndef HW_ARM_SYSBUS_FDT_H
|
||||
#define HW_ARM_SYSBUS_FDT_H
|
||||
|
||||
#include "hw/arm/arm.h"
|
||||
#include "qemu-common.h"
|
||||
#include "hw/sysbus.h"
|
||||
|
||||
/*
|
||||
* struct that contains dimensioning parameters of the platform bus
|
||||
*/
|
||||
typedef struct {
|
||||
hwaddr platform_bus_base; /* start address of the bus */
|
||||
hwaddr platform_bus_size; /* size of the bus */
|
||||
int platform_bus_first_irq; /* first hwirq assigned to the bus */
|
||||
int platform_bus_num_irqs; /* number of hwirq assigned to the bus */
|
||||
} ARMPlatformBusSystemParams;
|
||||
|
||||
/*
|
||||
* struct that contains all relevant info to build the fdt nodes of
|
||||
* platform bus and attached dynamic sysbus devices
|
||||
* in the future might be augmented with additional info
|
||||
* such as PHY, CLK handles ...
|
||||
*/
|
||||
typedef struct {
|
||||
const ARMPlatformBusSystemParams *system_params;
|
||||
struct arm_boot_info *binfo;
|
||||
const char *intc; /* parent interrupt controller name */
|
||||
} ARMPlatformBusFDTParams;
|
||||
#include "exec/hwaddr.h"
|
||||
|
||||
/**
|
||||
* arm_register_platform_bus_fdt_creator - register a machine init done
|
||||
* notifier that creates the device tree nodes of the platform bus and
|
||||
* associated dynamic sysbus devices
|
||||
* platform_bus_add_all_fdt_nodes - create all the platform bus nodes
|
||||
*
|
||||
* builds the parent platform bus node and all the nodes of dynamic
|
||||
* sysbus devices attached to it.
|
||||
*/
|
||||
void arm_register_platform_bus_fdt_creator(ARMPlatformBusFDTParams *fdt_params);
|
||||
|
||||
void platform_bus_add_all_fdt_nodes(void *fdt, const char *intc, hwaddr addr,
|
||||
hwaddr bus_size, int irq_start);
|
||||
#endif
|
||||
|
|
Loading…
Reference in a new issue