return alloc_vcpu(dom0, 0, 0);
}
-static int set_memory_reg_11(struct domain *d, struct kernel_info *kinfo,
- const struct dt_property *pp,
- const struct dt_device_node *np, __be32 *new_cell)
+static void allocate_memory_11(struct domain *d, struct kernel_info *kinfo)
{
- int reg_size = dt_cells_to_size(dt_n_addr_cells(np) + dt_n_size_cells(np));
paddr_t start;
paddr_t size;
struct page_info *pg = NULL;
if ( res )
panic("Unable to add pages in DOM0: %d\n", res);
- dt_set_range(&new_cell, np, start, size);
-
kinfo->mem.bank[0].start = start;
kinfo->mem.bank[0].size = size;
kinfo->mem.nr_banks = 1;
- return reg_size;
+ kinfo->unassigned_mem -= size;
}
-static int set_memory_reg(struct domain *d, struct kernel_info *kinfo,
- const struct dt_property *pp,
- const struct dt_device_node *np, __be32 *new_cell)
+static void allocate_memory(struct domain *d, struct kernel_info *kinfo)
{
- int reg_size = dt_cells_to_size(dt_n_addr_cells(np) + dt_n_size_cells(np));
- int l = 0;
+
+ struct dt_device_node *memory = NULL;
+ const void *reg;
+ u32 reg_len, reg_size;
unsigned int bank = 0;
- u64 start;
- u64 size;
- int ret;
if ( platform_has_quirk(PLATFORM_QUIRK_DOM0_MAPPING_11) )
- return set_memory_reg_11(d, kinfo, pp, np, new_cell);
+ return allocate_memory_11(d, kinfo);
- while ( kinfo->unassigned_mem > 0 && l + reg_size <= pp->length
- && kinfo->mem.nr_banks < NR_MEM_BANKS )
+ while ( (memory = dt_find_node_by_type(memory, "memory")) )
{
- ret = dt_device_get_address(np, bank, &start, &size);
- if ( ret )
- panic("Unable to retrieve the bank %u for %s\n",
- bank, dt_node_full_name(np));
-
- if ( size > kinfo->unassigned_mem )
- size = kinfo->unassigned_mem;
- dt_set_range(&new_cell, np, start, size);
-
- printk("Populate P2M %#"PRIx64"->%#"PRIx64"\n", start, start + size);
- if ( p2m_populate_ram(d, start, start + size) < 0 )
- panic("Failed to populate P2M\n");
- kinfo->mem.bank[kinfo->mem.nr_banks].start = start;
- kinfo->mem.bank[kinfo->mem.nr_banks].size = size;
- kinfo->mem.nr_banks++;
- kinfo->unassigned_mem -= size;
-
- l += reg_size;
- }
+ int l;
+
+ DPRINT("memory node\n");
+
+ reg_size = dt_cells_to_size(dt_n_addr_cells(memory) + dt_n_size_cells(memory));
+
+ reg = dt_get_property(memory, "reg", ®_len);
+ if ( reg == NULL )
+ panic("Memory node has no reg property!\n");
+
+ for ( l = 0;
+ kinfo->unassigned_mem > 0 && l + reg_size <= reg_len
+ && kinfo->mem.nr_banks < NR_MEM_BANKS;
+ l += reg_size )
+ {
+ paddr_t start, size;
- return l;
+ if ( dt_device_get_address(memory, bank, &start, &size) )
+ panic("Unable to retrieve the bank %u for %s\n",
+ bank, dt_node_full_name(memory));
+
+ if ( size > kinfo->unassigned_mem )
+ size = kinfo->unassigned_mem;
+
+ printk("Populate P2M %#"PRIx64"->%#"PRIx64"\n",
+ start, start + size);
+ if ( p2m_populate_ram(d, start, start + size) < 0 )
+ panic("Failed to populate P2M\n");
+ kinfo->mem.bank[kinfo->mem.nr_banks].start = start;
+ kinfo->mem.bank[kinfo->mem.nr_banks].size = size;
+ kinfo->mem.nr_banks++;
+
+ kinfo->unassigned_mem -= size;
+ }
+ }
}
static int write_properties(struct domain *d, struct kernel_info *kinfo,
continue;
}
}
- /*
- * In a memory node: adjust reg property.
- * TODO: handle properly memory node (ie: device_type = "memory")
- */
- else if ( dt_node_name_is_equal(np, "memory") )
- {
- if ( dt_property_name_is_equal(pp, "reg") )
- {
- new_data = xzalloc_bytes(pp->length);
- if ( new_data == NULL )
- return -FDT_ERR_XEN(ENOMEM);
-
- prop_len = set_memory_reg(d, kinfo, pp, np,
- (__be32 *)new_data);
- prop_data = new_data;
- }
- }
res = fdt_property(kinfo->fdt, pp->name, prop_data, prop_len);
return res;
}
+static int make_memory_node(const struct domain *d,
+ void *fdt,
+ const struct kernel_info *kinfo)
+{
+ int res, i;
+ int nr_cells = XEN_FDT_NODE_REG_SIZE*kinfo->mem.nr_banks;
+ __be32 reg[nr_cells];
+ __be32 *cells;
+
+ DPRINT("Create memory node\n");
+
+ /* ePAPR 3.4 */
+ res = fdt_begin_node(fdt, "memory");
+ if ( res )
+ return res;
+
+ res = fdt_property_string(fdt, "device_type", "memory");
+ if ( res )
+ return res;
+
+ cells = ®[0];
+ for ( i = 0 ; i < kinfo->mem.nr_banks; i++ )
+ {
+ u64 start = kinfo->mem.bank[i].start;
+ u64 size = kinfo->mem.bank[i].size;
+
+ DPRINT(" Bank %d: %#"PRIx64"->%#"PRIx64"\n",
+ i, start, start + size);
+
+ set_xen_range(&cells, start, size);
+ }
+
+ res = fdt_property(fdt, "reg", reg, nr_cells);
+ if ( res )
+ return res;
+
+ res = fdt_end_node(fdt);
+
+ return res;
+}
static int make_hypervisor_node(void *fdt, const struct dt_device_node *parent)
{
}
static int make_xen_node(const struct domain *d, void *fdt,
- const struct dt_device_node *parent)
+ const struct dt_device_node *parent,
+ const struct kernel_info *kinfo)
{
int res;
if ( res )
return res;
+ res = make_memory_node(d, fdt, kinfo);
+ if ( res )
+ return res;
+
res = make_gic_node(d, fdt);
if ( res )
return res;
DT_MATCH_COMPATIBLE("xen,multiboot-module"),
DT_MATCH_COMPATIBLE("arm,psci"),
DT_MATCH_PATH("/cpus"),
+ DT_MATCH_TYPE("memory"),
DT_MATCH_GIC,
DT_MATCH_TIMER,
{ /* sentinel */ },
if ( res )
return res;
- res = make_xen_node(d, kinfo->fdt, np);
+ res = make_xen_node(d, kinfo->fdt, np, kinfo);
if ( res )
return res;
}
const void *fdt;
int new_size;
int ret;
- paddr_t end;
- paddr_t initrd_len;
- paddr_t dtb_len;
ASSERT(dt_host && (dt_host->sibling == NULL));
- kinfo->unassigned_mem = dom0_mem;
-
fdt = device_tree_flattened;
new_size = fdt_totalsize(fdt) + DOM0_FDT_EXTRA_SIZE;
if ( ret < 0 )
goto err;
- /* Align DTB and initrd size to 2Mb. Linux only requires 4 byte alignment */
- initrd_len = ROUNDUP(early_info.modules.module[MOD_INITRD].size, MB(2));
- dtb_len = ROUNDUP(fdt_totalsize(kinfo->fdt), MB(2));
- new_size = initrd_len + dtb_len;
-
- /*
- * DTB must be loaded such that it does not conflict with the
- * kernel decompressor. For 32-bit Linux Documentation/arm/Booting
- * recommends just after the 128MB boundary while for 64-bit Linux
- * the recommendation in Documentation/arm64/booting.txt is below
- * 512MB. Place at 128MB, (or, if we have less RAM, as high as
- * possible) in order to satisfy both.
- * If the bootloader provides an initrd, it will be loaded just
- * after the DTB.
- */
- end = kinfo->mem.bank[0].start + kinfo->mem.bank[0].size;
- end = MIN(kinfo->mem.bank[0].start + (128<<20) + new_size, end);
-
- kinfo->initrd_paddr = end - initrd_len;
- kinfo->dtb_paddr = kinfo->initrd_paddr - dtb_len;
-
- if ( kinfo->dtb_paddr < kinfo->mem.bank[0].start ||
- kinfo->mem.bank[0].start + new_size > end )
- {
- printk(XENLOG_ERR "Not enough memory in the first bank for "
- "the device tree.");
- ret = -FDT_ERR_XEN(EINVAL);
- goto err;
- }
-
return 0;
err:
d->max_pages = ~0U;
- rc = prepare_dtb(d, &kinfo);
+ kinfo.unassigned_mem = dom0_mem;
+
+ allocate_memory(d, &kinfo);
+
+ rc = kernel_prepare(&kinfo);
if ( rc < 0 )
return rc;
- rc = kernel_prepare(&kinfo);
+#ifdef CONFIG_ARM_64
+ d->arch.type = kinfo.type;
+#endif
+
+ rc = prepare_dtb(d, &kinfo);
if ( rc < 0 )
return rc;
if ( rc < 0 )
return rc;
- if ( kinfo.check_overlap )
- kinfo.check_overlap(&kinfo);
-
/* The following loads use the domain's p2m */
p2m_load_VTTBR(d);
#ifdef CONFIG_ARM_64
WRITE_SYSREG(READ_SYSREG(HCR_EL2) | HCR_RW, HCR_EL2);
#endif
+ /*
+ * kernel_load will determine the placement of the initrd & fdt in
+ * RAM, so call it first.
+ */
kernel_load(&kinfo);
/* initrd_load will fix up the fdt, so call it before dtb_load */
initrd_load(&kinfo);
regs->pc = (register_t)kinfo.entry;
-
if ( is_pv32_domain(d) )
{
regs->cpsr = PSR_GUEST32_INIT;
clear_fixmap(FIXMAP_MISC);
}
-static void kernel_zimage_check_overlap(struct kernel_info *info)
+static void place_modules(struct kernel_info *info,
+ paddr_t kernel_start,
+ paddr_t kernel_end)
{
- paddr_t zimage_start = info->zimage.load_addr;
- paddr_t zimage_end = info->zimage.load_addr + info->zimage.len;
- paddr_t start = info->dtb_paddr;
- paddr_t end;
+ /* Align DTB and initrd size to 2Mb. Linux only requires 4 byte alignment */
+ const paddr_t initrd_len =
+ ROUNDUP(early_info.modules.module[MOD_INITRD].size, MB(2));
+ const paddr_t dtb_len = ROUNDUP(fdt_totalsize(info->fdt), MB(2));
+ const paddr_t total = initrd_len + dtb_len;
- end = info->initrd_paddr + early_info.modules.module[MOD_INITRD].size;
+ /* Convenient */
+ const paddr_t mem_start = info->mem.bank[0].start;
+ const paddr_t mem_size = info->mem.bank[0].size;
+ const paddr_t mem_end = mem_start + mem_size;
+ const paddr_t kernel_size = kernel_end - kernel_start;
+
+ paddr_t addr;
+
+ if ( total + kernel_size > mem_size )
+ panic("Not enough memory in the first bank for the dtb+initrd.");
/*
- * In the dom0 memory, the initrd will be just after the DTB. So we
- * only need to check if the zImage range will overlap the
- * DTB-initrd range.
+ * DTB must be loaded such that it does not conflict with the
+ * kernel decompressor. For 32-bit Linux Documentation/arm/Booting
+ * recommends just after the 128MB boundary while for 64-bit Linux
+ * the recommendation in Documentation/arm64/booting.txt is below
+ * 512MB.
+ *
+ * If the bootloader provides an initrd, it will be loaded just
+ * after the DTB.
+ *
+ * We try to place dtb+initrd at 128MB, (or, if we have less RAM,
+ * as high as possible). If there is no space then fallback to
+ * just after the kernel, if there is room, otherwise just before.
*/
- if ( (start > zimage_end) || (end < zimage_start) )
+
+ if ( kernel_end < MIN(mem_start + MB(128), mem_end - total) )
+ addr = MIN(mem_start + MB(128), mem_end - total);
+ else if ( mem_end - ROUNDUP(kernel_end, MB(2)) >= total )
+ addr = ROUNDUP(kernel_end, MB(2));
+ else if ( kernel_start - mem_start >= total )
+ addr = kernel_start - total;
+ else
+ {
+ panic("Unable to find suitable location for dtb+initrd.");
return;
+ }
- panic(XENLOG_ERR "The kernel(0x%"PRIpaddr"-0x%"PRIpaddr
- ") is overlapping the DTB-initrd(0x%"PRIpaddr"-0x%"PRIpaddr")\n",
- zimage_start, zimage_end, start, end);
+ info->dtb_paddr = addr;
+ info->initrd_paddr = info->dtb_paddr + dtb_len;
}
static void kernel_zimage_load(struct kernel_info *info)
paddr_t len = info->zimage.len;
unsigned long offs;
+ place_modules(info, load_addr, load_addr + len);
+
printk("Loading zImage from %"PRIpaddr" to %"PRIpaddr"-%"PRIpaddr"\n",
paddr, load_addr, load_addr + len);
for ( offs = 0; offs < len; )
info->entry = info->zimage.load_addr;
info->load = kernel_zimage_load;
- info->check_overlap = kernel_zimage_check_overlap;
info->type = DOMAIN_PV64;
paddr_t load_end;
load_end = info->mem.bank[0].start + info->mem.bank[0].size;
- load_end = MIN(info->mem.bank[0].start + (128<<20), load_end);
-
- /*
- * FDT is loaded above 128M or as high as possible, so the
- * only way we can clash is if we have <=128MB, in which case
- * FDT will be right at the end and so dtb_paddr will be below
- * the proposed kernel load address. Move the kernel down if
- * necessary.
- */
- if ( load_end >= info->dtb_paddr )
- load_end = info->dtb_paddr;
+ load_end = MIN(info->mem.bank[0].start + MB(128), load_end);
info->zimage.load_addr = load_end - end;
/* Align to 2MB */
info->entry = info->zimage.load_addr;
info->load = kernel_zimage_load;
- info->check_overlap = kernel_zimage_check_overlap;
#ifdef CONFIG_ARM_64
info->type = DOMAIN_PV32;
static void kernel_elf_load(struct kernel_info *info)
{
+ place_modules(info,
+ info->elf.parms.virt_kstart,
+ info->elf.parms.virt_kend);
+
printk("Loading ELF image into guest memory\n");
info->elf.elf.dest_base = (void*)(unsigned long)info->elf.parms.virt_kstart;
info->elf.elf.dest_size =
info->elf.parms.virt_kend - info->elf.parms.virt_kstart;
+
elf_load_binary(&info->elf.elf);
printk("Free temporary kernel buffer\n");
*/
info->entry = info->elf.parms.virt_entry;
info->load = kernel_elf_load;
- info->check_overlap = NULL;
if ( elf_check_broken(&info->elf.elf) )
printk("Xen: warning: ELF kernel broken: %s\n",
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