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-rw-r--r--hw/spapr.c135
1 files changed, 91 insertions, 44 deletions
diff --git a/hw/spapr.c b/hw/spapr.c
index 0e1f80dfdc..b011371813 100644
--- a/hw/spapr.c
+++ b/hw/spapr.c
@@ -50,19 +50,29 @@
#include <libfdt.h>
-#define KERNEL_LOAD_ADDR 0x00000000
-#define INITRD_LOAD_ADDR 0x02800000
+/* SLOF memory layout:
+ *
+ * SLOF raw image loaded at 0, copies its romfs right below the flat
+ * device-tree, then position SLOF itself 31M below that
+ *
+ * So we set FW_OVERHEAD to 40MB which should account for all of that
+ * and more
+ *
+ * We load our kernel at 4M, leaving space for SLOF initial image
+ */
#define FDT_MAX_SIZE 0x10000
#define RTAS_MAX_SIZE 0x10000
#define FW_MAX_SIZE 0x400000
#define FW_FILE_NAME "slof.bin"
+#define FW_OVERHEAD 0x2800000
+#define KERNEL_LOAD_ADDR FW_MAX_SIZE
-#define MIN_RMA_SLOF 128UL
+#define MIN_RMA_SLOF 128UL
#define TIMEBASE_FREQ 512000000ULL
#define MAX_CPUS 256
-#define XICS_IRQS 1024
+#define XICS_IRQS 1024
#define SPAPR_PCI_BUID 0x800000020000001ULL
#define SPAPR_PCI_MEM_WIN_ADDR (0x10000000000ULL + 0xA0000000)
@@ -139,6 +149,7 @@ static void *spapr_create_fdt_skel(const char *cpu_model,
target_phys_addr_t rma_size,
target_phys_addr_t initrd_base,
target_phys_addr_t initrd_size,
+ target_phys_addr_t kernel_size,
const char *boot_device,
const char *kernel_cmdline,
long hash_shift)
@@ -176,6 +187,12 @@ static void *spapr_create_fdt_skel(const char *cpu_model,
fdt = g_malloc0(FDT_MAX_SIZE);
_FDT((fdt_create(fdt, FDT_MAX_SIZE)));
+ if (kernel_size) {
+ _FDT((fdt_add_reservemap_entry(fdt, KERNEL_LOAD_ADDR, kernel_size)));
+ }
+ if (initrd_size) {
+ _FDT((fdt_add_reservemap_entry(fdt, initrd_base, initrd_size)));
+ }
_FDT((fdt_finish_reservemap(fdt)));
/* Root node */
@@ -197,15 +214,13 @@ static void *spapr_create_fdt_skel(const char *cpu_model,
&start_prop, sizeof(start_prop))));
_FDT((fdt_property(fdt, "linux,initrd-end",
&end_prop, sizeof(end_prop))));
- _FDT((fdt_property_string(fdt, "qemu,boot-device", boot_device)));
+ if (kernel_size) {
+ uint64_t kprop[2] = { cpu_to_be64(KERNEL_LOAD_ADDR),
+ cpu_to_be64(kernel_size) };
- /*
- * Because we don't always invoke any firmware, we can't rely on
- * that to do BAR allocation. Long term, we should probably do
- * that ourselves, but for now, this setting (plus advertising the
- * current BARs as 0) causes sufficiently recent kernels to to the
- * BAR assignment themselves */
- _FDT((fdt_property_cell(fdt, "linux,pci-probe-only", 0)));
+ _FDT((fdt_property(fdt, "qemu,boot-kernel", &kprop, sizeof(kprop))));
+ }
+ _FDT((fdt_property_string(fdt, "qemu,boot-device", boot_device)));
_FDT((fdt_end_node(fdt)));
@@ -445,6 +460,12 @@ static void spapr_finalize_fdt(sPAPREnvironment *spapr,
_FDT((fdt_pack(fdt)));
+ if (fdt_totalsize(fdt) > FDT_MAX_SIZE) {
+ hw_error("FDT too big ! 0x%x bytes (max is 0x%x)\n",
+ fdt_totalsize(fdt), FDT_MAX_SIZE);
+ exit(1);
+ }
+
cpu_physical_memory_write(fdt_addr, fdt, fdt_totalsize(fdt));
g_free(fdt);
@@ -494,8 +515,9 @@ static void ppc_spapr_init(ram_addr_t ram_size,
MemoryRegion *sysmem = get_system_memory();
MemoryRegion *ram = g_new(MemoryRegion, 1);
target_phys_addr_t rma_alloc_size, rma_size;
- uint32_t initrd_base;
- long kernel_size, initrd_size, fw_size;
+ uint32_t initrd_base = 0;
+ long kernel_size = 0, initrd_size = 0;
+ long load_limit, rtas_limit, fw_size;
long pteg_shift = 17;
char *filename;
@@ -517,11 +539,13 @@ static void ppc_spapr_init(ram_addr_t ram_size,
rma_size = ram_size;
}
- /* We place the device tree just below either the top of the RMA,
+ /* We place the device tree and RTAS just below either the top of the RMA,
* or just below 2GB, whichever is lowere, so that it can be
* processed with 32-bit real mode code if necessary */
- spapr->fdt_addr = MIN(rma_size, 0x80000000) - FDT_MAX_SIZE;
- spapr->rtas_addr = spapr->fdt_addr - RTAS_MAX_SIZE;
+ rtas_limit = MIN(rma_size, 0x80000000);
+ spapr->rtas_addr = rtas_limit - RTAS_MAX_SIZE;
+ spapr->fdt_addr = spapr->rtas_addr - FDT_MAX_SIZE;
+ load_limit = spapr->fdt_addr - FW_OVERHEAD;
/* init CPUs */
if (cpu_model == NULL) {
@@ -577,13 +601,19 @@ static void ppc_spapr_init(ram_addr_t ram_size,
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "spapr-rtas.bin");
spapr->rtas_size = load_image_targphys(filename, spapr->rtas_addr,
- ram_size - spapr->rtas_addr);
+ rtas_limit - spapr->rtas_addr);
if (spapr->rtas_size < 0) {
hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
exit(1);
}
+ if (spapr->rtas_size > RTAS_MAX_SIZE) {
+ hw_error("RTAS too big ! 0x%lx bytes (max is 0x%x)\n",
+ spapr->rtas_size, RTAS_MAX_SIZE);
+ exit(1);
+ }
g_free(filename);
+
/* Set up Interrupt Controller */
spapr->icp = xics_system_init(XICS_IRQS);
spapr->next_irq = 16;
@@ -622,6 +652,20 @@ static void ppc_spapr_init(ram_addr_t ram_size,
spapr_vscsi_create(spapr->vio_bus, 0x2000 + i);
}
+ if (rma_size < (MIN_RMA_SLOF << 20)) {
+ fprintf(stderr, "qemu: pSeries SLOF firmware requires >= "
+ "%ldM guest RMA (Real Mode Area memory)\n", MIN_RMA_SLOF);
+ exit(1);
+ }
+
+ fprintf(stderr, "sPAPR memory map:\n");
+ fprintf(stderr, "RTAS : 0x%08lx..%08lx\n",
+ (unsigned long)spapr->rtas_addr,
+ (unsigned long)(spapr->rtas_addr + spapr->rtas_size - 1));
+ fprintf(stderr, "FDT : 0x%08lx..%08lx\n",
+ (unsigned long)spapr->fdt_addr,
+ (unsigned long)(spapr->fdt_addr + FDT_MAX_SIZE - 1));
+
if (kernel_filename) {
uint64_t lowaddr = 0;
@@ -630,57 +674,60 @@ static void ppc_spapr_init(ram_addr_t ram_size,
if (kernel_size < 0) {
kernel_size = load_image_targphys(kernel_filename,
KERNEL_LOAD_ADDR,
- ram_size - KERNEL_LOAD_ADDR);
+ load_limit - KERNEL_LOAD_ADDR);
}
if (kernel_size < 0) {
fprintf(stderr, "qemu: could not load kernel '%s'\n",
kernel_filename);
exit(1);
}
+ fprintf(stderr, "Kernel : 0x%08x..%08lx\n",
+ KERNEL_LOAD_ADDR, KERNEL_LOAD_ADDR + kernel_size - 1);
/* load initrd */
if (initrd_filename) {
- initrd_base = INITRD_LOAD_ADDR;
+ /* Try to locate the initrd in the gap between the kernel
+ * and the firmware. Add a bit of space just in case
+ */
+ initrd_base = (KERNEL_LOAD_ADDR + kernel_size + 0x1ffff) & ~0xffff;
initrd_size = load_image_targphys(initrd_filename, initrd_base,
- ram_size - initrd_base);
+ load_limit - initrd_base);
if (initrd_size < 0) {
fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
initrd_filename);
exit(1);
}
+ fprintf(stderr, "Ramdisk : 0x%08lx..%08lx\n",
+ (long)initrd_base, (long)(initrd_base + initrd_size - 1));
} else {
initrd_base = 0;
initrd_size = 0;
}
+ }
- spapr->entry_point = KERNEL_LOAD_ADDR;
- } else {
- if (rma_size < (MIN_RMA_SLOF << 20)) {
- fprintf(stderr, "qemu: pSeries SLOF firmware requires >= "
- "%ldM guest RMA (Real Mode Area memory)\n", MIN_RMA_SLOF);
- exit(1);
- }
- filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, FW_FILE_NAME);
- fw_size = load_image_targphys(filename, 0, FW_MAX_SIZE);
- if (fw_size < 0) {
- hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
- exit(1);
- }
- g_free(filename);
- spapr->entry_point = 0x100;
- initrd_base = 0;
- initrd_size = 0;
-
- /* SLOF will startup the secondary CPUs using RTAS,
- rather than expecting a kexec() style entry */
- for (env = first_cpu; env != NULL; env = env->next_cpu) {
- env->halted = 1;
- }
+ filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, FW_FILE_NAME);
+ fw_size = load_image_targphys(filename, 0, FW_MAX_SIZE);
+ if (fw_size < 0) {
+ hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
+ exit(1);
+ }
+ g_free(filename);
+ fprintf(stderr, "Firmware load : 0x%08x..%08lx\n",
+ 0, fw_size);
+ fprintf(stderr, "Firmware runtime : 0x%08lx..%08lx\n",
+ load_limit, (unsigned long)spapr->fdt_addr);
+
+ spapr->entry_point = 0x100;
+
+ /* SLOF will startup the secondary CPUs using RTAS */
+ for (env = first_cpu; env != NULL; env = env->next_cpu) {
+ env->halted = 1;
}
/* Prepare the device tree */
spapr->fdt_skel = spapr_create_fdt_skel(cpu_model, rma_size,
initrd_base, initrd_size,
+ kernel_size,
boot_device, kernel_cmdline,
pteg_shift + 7);
assert(spapr->fdt_skel != NULL);
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-14 11:53:54 +0000