spapr: Allow changing offset for -kernel image
This allows moving the kernel in the guest memory. The option is useful for step debugging (as Linux is linked at 0x0); it also allows loading grub which is normally linked to run at 0x20000. This uses the existing kernel address by default. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-Id: <20200203032943.121178-6-aik@ozlabs.ru> Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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@ -1064,7 +1064,7 @@ static void spapr_dt_chosen(SpaprMachineState *spapr, void *fdt)
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}
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}
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if (spapr->kernel_size) {
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if (spapr->kernel_size) {
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uint64_t kprop[2] = { cpu_to_be64(KERNEL_LOAD_ADDR),
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uint64_t kprop[2] = { cpu_to_be64(spapr->kernel_addr),
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cpu_to_be64(spapr->kernel_size) };
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cpu_to_be64(spapr->kernel_size) };
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_FDT(fdt_setprop(fdt, chosen, "qemu,boot-kernel",
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_FDT(fdt_setprop(fdt, chosen, "qemu,boot-kernel",
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@ -1252,7 +1252,8 @@ void *spapr_build_fdt(SpaprMachineState *spapr, bool reset, size_t space)
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/* Build memory reserve map */
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/* Build memory reserve map */
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if (reset) {
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if (reset) {
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if (spapr->kernel_size) {
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if (spapr->kernel_size) {
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_FDT((fdt_add_mem_rsv(fdt, KERNEL_LOAD_ADDR, spapr->kernel_size)));
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_FDT((fdt_add_mem_rsv(fdt, spapr->kernel_addr,
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spapr->kernel_size)));
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}
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}
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if (spapr->initrd_size) {
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if (spapr->initrd_size) {
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_FDT((fdt_add_mem_rsv(fdt, spapr->initrd_base,
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_FDT((fdt_add_mem_rsv(fdt, spapr->initrd_base,
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@ -1285,7 +1286,9 @@ void *spapr_build_fdt(SpaprMachineState *spapr, bool reset, size_t space)
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static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
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static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
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{
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{
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return (addr & 0x0fffffff) + KERNEL_LOAD_ADDR;
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SpaprMachineState *spapr = opaque;
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return (addr & 0x0fffffff) + spapr->kernel_addr;
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}
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}
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static void emulate_spapr_hypercall(PPCVirtualHypervisor *vhyp,
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static void emulate_spapr_hypercall(PPCVirtualHypervisor *vhyp,
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@ -2967,14 +2970,15 @@ static void spapr_machine_init(MachineState *machine)
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uint64_t lowaddr = 0;
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uint64_t lowaddr = 0;
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spapr->kernel_size = load_elf(kernel_filename, NULL,
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spapr->kernel_size = load_elf(kernel_filename, NULL,
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translate_kernel_address, NULL,
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translate_kernel_address, spapr,
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NULL, &lowaddr, NULL, NULL, 1,
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NULL, &lowaddr, NULL, NULL, 1,
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PPC_ELF_MACHINE, 0, 0);
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PPC_ELF_MACHINE, 0, 0);
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if (spapr->kernel_size == ELF_LOAD_WRONG_ENDIAN) {
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if (spapr->kernel_size == ELF_LOAD_WRONG_ENDIAN) {
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spapr->kernel_size = load_elf(kernel_filename, NULL,
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spapr->kernel_size = load_elf(kernel_filename, NULL,
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translate_kernel_address, NULL, NULL,
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translate_kernel_address, spapr, NULL,
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&lowaddr, NULL, NULL, 0,
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&lowaddr, NULL, NULL, 0,
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PPC_ELF_MACHINE, 0, 0);
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PPC_ELF_MACHINE,
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0, 0);
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spapr->kernel_le = spapr->kernel_size > 0;
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spapr->kernel_le = spapr->kernel_size > 0;
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}
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}
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if (spapr->kernel_size < 0) {
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if (spapr->kernel_size < 0) {
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@ -2988,7 +2992,7 @@ static void spapr_machine_init(MachineState *machine)
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/* Try to locate the initrd in the gap between the kernel
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/* Try to locate the initrd in the gap between the kernel
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* and the firmware. Add a bit of space just in case
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* and the firmware. Add a bit of space just in case
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*/
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*/
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spapr->initrd_base = (KERNEL_LOAD_ADDR + spapr->kernel_size
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spapr->initrd_base = (spapr->kernel_addr + spapr->kernel_size
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+ 0x1ffff) & ~0xffff;
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+ 0x1ffff) & ~0xffff;
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spapr->initrd_size = load_image_targphys(initrd_filename,
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spapr->initrd_size = load_image_targphys(initrd_filename,
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spapr->initrd_base,
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spapr->initrd_base,
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@ -3234,6 +3238,18 @@ static void spapr_set_vsmt(Object *obj, Visitor *v, const char *name,
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visit_type_uint32(v, name, (uint32_t *)opaque, errp);
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visit_type_uint32(v, name, (uint32_t *)opaque, errp);
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}
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}
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static void spapr_get_kernel_addr(Object *obj, Visitor *v, const char *name,
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void *opaque, Error **errp)
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{
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visit_type_uint64(v, name, (uint64_t *)opaque, errp);
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}
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static void spapr_set_kernel_addr(Object *obj, Visitor *v, const char *name,
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void *opaque, Error **errp)
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{
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visit_type_uint64(v, name, (uint64_t *)opaque, errp);
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}
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static char *spapr_get_ic_mode(Object *obj, Error **errp)
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static char *spapr_get_ic_mode(Object *obj, Error **errp)
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{
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{
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SpaprMachineState *spapr = SPAPR_MACHINE(obj);
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SpaprMachineState *spapr = SPAPR_MACHINE(obj);
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@ -3339,6 +3355,14 @@ static void spapr_instance_init(Object *obj)
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object_property_add_bool(obj, "vfio-no-msix-emulation",
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object_property_add_bool(obj, "vfio-no-msix-emulation",
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spapr_get_msix_emulation, NULL, NULL);
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spapr_get_msix_emulation, NULL, NULL);
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object_property_add(obj, "kernel-addr", "uint64", spapr_get_kernel_addr,
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spapr_set_kernel_addr, NULL, &spapr->kernel_addr,
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&error_abort);
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object_property_set_description(obj, "kernel-addr",
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stringify(KERNEL_LOAD_ADDR)
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" for -kernel is the default",
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NULL);
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spapr->kernel_addr = KERNEL_LOAD_ADDR;
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/* The machine class defines the default interrupt controller mode */
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/* The machine class defines the default interrupt controller mode */
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spapr->irq = smc->irq;
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spapr->irq = smc->irq;
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object_property_add_str(obj, "ic-mode", spapr_get_ic_mode,
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object_property_add_str(obj, "ic-mode", spapr_get_ic_mode,
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@ -162,6 +162,7 @@ struct SpaprMachineState {
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void *fdt_blob;
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void *fdt_blob;
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long kernel_size;
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long kernel_size;
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bool kernel_le;
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bool kernel_le;
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uint64_t kernel_addr;
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uint32_t initrd_base;
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uint32_t initrd_base;
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long initrd_size;
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long initrd_size;
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uint64_t rtc_offset; /* Now used only during incoming migration */
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uint64_t rtc_offset; /* Now used only during incoming migration */
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