#include <linux/console.h>
#include <linux/cache.h>
#include <linux/bootmem.h>
-#include <linux/seq_file.h>
#include <linux/screen_info.h>
#include <linux/init.h>
#include <linux/kexec.h>
#include <linux/crash_dump.h>
#include <linux/root_dev.h>
-#include <linux/clk-provider.h>
#include <linux/cpu.h>
#include <linux/interrupt.h>
#include <linux/smp.h>
#include <linux/of_fdt.h>
#include <linux/of_platform.h>
#include <linux/efi.h>
-#include <linux/personality.h>
+#include <linux/psci.h>
#include <asm/acpi.h>
#include <asm/fixmap.h>
#include <asm/elf.h>
#include <asm/cpufeature.h>
#include <asm/cpu_ops.h>
+#include <asm/kasan.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/smp_plat.h>
#include <asm/tlbflush.h>
#include <asm/traps.h>
#include <asm/memblock.h>
-#include <asm/psci.h>
#include <asm/efi.h>
-#include <asm/virt.h>
-
-unsigned long elf_hwcap __read_mostly;
-EXPORT_SYMBOL_GPL(elf_hwcap);
-
-#ifdef CONFIG_COMPAT
-#define COMPAT_ELF_HWCAP_DEFAULT \
- (COMPAT_HWCAP_HALF|COMPAT_HWCAP_THUMB|\
- COMPAT_HWCAP_FAST_MULT|COMPAT_HWCAP_EDSP|\
- COMPAT_HWCAP_TLS|COMPAT_HWCAP_VFP|\
- COMPAT_HWCAP_VFPv3|COMPAT_HWCAP_VFPv4|\
- COMPAT_HWCAP_NEON|COMPAT_HWCAP_IDIV|\
- COMPAT_HWCAP_LPAE)
-unsigned int compat_elf_hwcap __read_mostly = COMPAT_ELF_HWCAP_DEFAULT;
-unsigned int compat_elf_hwcap2 __read_mostly;
-#endif
-
-DECLARE_BITMAP(cpu_hwcaps, ARM64_NCAPS);
+#include <asm/xen/hypervisor.h>
phys_addr_t __fdt_pointer __initdata;
#define kernel_code mem_res[0]
#define kernel_data mem_res[1]
-void __init early_print(const char *str, ...)
-{
- char buf[256];
- va_list ap;
-
- va_start(ap, str);
- vsnprintf(buf, sizeof(buf), str, ap);
- va_end(ap);
-
- printk("%s", buf);
-}
-
/*
* The recorded values of x0 .. x3 upon kernel entry.
*/
}
struct mpidr_hash mpidr_hash;
-#ifdef CONFIG_SMP
/**
* smp_build_mpidr_hash - Pre-compute shifts required at each affinity
* level in order to build a linear index from an
pr_warn("Large number of MPIDR hash buckets detected\n");
__flush_dcache_area(&mpidr_hash, sizeof(struct mpidr_hash));
}
-#endif
-
-static void __init hyp_mode_check(void)
-{
- if (is_hyp_mode_available())
- pr_info("CPU: All CPU(s) started at EL2\n");
- else if (is_hyp_mode_mismatched())
- WARN_TAINT(1, TAINT_CPU_OUT_OF_SPEC,
- "CPU: CPUs started in inconsistent modes");
- else
- pr_info("CPU: All CPU(s) started at EL1\n");
-}
-
-void __init do_post_cpus_up_work(void)
-{
- hyp_mode_check();
- apply_alternatives_all();
-}
-
-#ifdef CONFIG_UP_LATE_INIT
-void __init up_late_init(void)
-{
- do_post_cpus_up_work();
-}
-#endif /* CONFIG_UP_LATE_INIT */
-
-static void __init setup_processor(void)
-{
- u64 features, block;
- u32 cwg;
- int cls;
-
- printk("CPU: AArch64 Processor [%08x] revision %d\n",
- read_cpuid_id(), read_cpuid_id() & 15);
-
- sprintf(init_utsname()->machine, ELF_PLATFORM);
- elf_hwcap = 0;
-
- cpuinfo_store_boot_cpu();
-
- /*
- * Check for sane CTR_EL0.CWG value.
- */
- cwg = cache_type_cwg();
- cls = cache_line_size();
- if (!cwg)
- pr_warn("No Cache Writeback Granule information, assuming cache line size %d\n",
- cls);
- if (L1_CACHE_BYTES < cls)
- pr_warn("L1_CACHE_BYTES smaller than the Cache Writeback Granule (%d < %d)\n",
- L1_CACHE_BYTES, cls);
-
- /*
- * ID_AA64ISAR0_EL1 contains 4-bit wide signed feature blocks.
- * The blocks we test below represent incremental functionality
- * for non-negative values. Negative values are reserved.
- */
- features = read_cpuid(ID_AA64ISAR0_EL1);
- block = (features >> 4) & 0xf;
- if (!(block & 0x8)) {
- switch (block) {
- default:
- case 2:
- elf_hwcap |= HWCAP_PMULL;
- case 1:
- elf_hwcap |= HWCAP_AES;
- case 0:
- break;
- }
- }
-
- block = (features >> 8) & 0xf;
- if (block && !(block & 0x8))
- elf_hwcap |= HWCAP_SHA1;
-
- block = (features >> 12) & 0xf;
- if (block && !(block & 0x8))
- elf_hwcap |= HWCAP_SHA2;
-
- block = (features >> 16) & 0xf;
- if (block && !(block & 0x8))
- elf_hwcap |= HWCAP_CRC32;
-
-#ifdef CONFIG_COMPAT
- /*
- * ID_ISAR5_EL1 carries similar information as above, but pertaining to
- * the Aarch32 32-bit execution state.
- */
- features = read_cpuid(ID_ISAR5_EL1);
- block = (features >> 4) & 0xf;
- if (!(block & 0x8)) {
- switch (block) {
- default:
- case 2:
- compat_elf_hwcap2 |= COMPAT_HWCAP2_PMULL;
- case 1:
- compat_elf_hwcap2 |= COMPAT_HWCAP2_AES;
- case 0:
- break;
- }
- }
-
- block = (features >> 8) & 0xf;
- if (block && !(block & 0x8))
- compat_elf_hwcap2 |= COMPAT_HWCAP2_SHA1;
-
- block = (features >> 12) & 0xf;
- if (block && !(block & 0x8))
- compat_elf_hwcap2 |= COMPAT_HWCAP2_SHA2;
-
- block = (features >> 16) & 0xf;
- if (block && !(block & 0x8))
- compat_elf_hwcap2 |= COMPAT_HWCAP2_CRC32;
-#endif
-}
static void __init setup_machine_fdt(phys_addr_t dt_phys)
{
- if (!dt_phys || !early_init_dt_scan(phys_to_virt(dt_phys))) {
- early_print("\n"
- "Error: invalid device tree blob at physical address 0x%p (virtual address 0x%p)\n"
- "The dtb must be 8-byte aligned and passed in the first 512MB of memory\n"
- "\nPlease check your bootloader.\n",
- dt_phys, phys_to_virt(dt_phys));
+ void *dt_virt = fixmap_remap_fdt(dt_phys);
+
+ if (!dt_virt || !early_init_dt_scan(dt_virt)) {
+ pr_crit("\n"
+ "Error: invalid device tree blob at physical address %pa (virtual address 0x%p)\n"
+ "The dtb must be 8-byte aligned and must not exceed 2 MB in size\n"
+ "\nPlease check your bootloader.",
+ &dt_phys, dt_virt);
while (true)
cpu_relax();
}
}
+#ifdef CONFIG_BLK_DEV_INITRD
+/*
+ * Relocate initrd if it is not completely within the linear mapping.
+ * This would be the case if mem= cuts out all or part of it.
+ */
+static void __init relocate_initrd(void)
+{
+ phys_addr_t orig_start = __virt_to_phys(initrd_start);
+ phys_addr_t orig_end = __virt_to_phys(initrd_end);
+ phys_addr_t ram_end = memblock_end_of_DRAM();
+ phys_addr_t new_start;
+ unsigned long size, to_free = 0;
+ void *dest;
+
+ if (orig_end <= ram_end)
+ return;
+
+ /*
+ * Any of the original initrd which overlaps the linear map should
+ * be freed after relocating.
+ */
+ if (orig_start < ram_end)
+ to_free = ram_end - orig_start;
+
+ size = orig_end - orig_start;
+ if (!size)
+ return;
+
+ /* initrd needs to be relocated completely inside linear mapping */
+ new_start = memblock_find_in_range(0, PFN_PHYS(max_pfn),
+ size, PAGE_SIZE);
+ if (!new_start)
+ panic("Cannot relocate initrd of size %ld\n", size);
+ memblock_reserve(new_start, size);
+
+ initrd_start = __phys_to_virt(new_start);
+ initrd_end = initrd_start + size;
+
+ pr_info("Moving initrd from [%llx-%llx] to [%llx-%llx]\n",
+ orig_start, orig_start + size - 1,
+ new_start, new_start + size - 1);
+
+ dest = (void *)initrd_start;
+
+ if (to_free) {
+ memcpy(dest, (void *)__phys_to_virt(orig_start), to_free);
+ dest += to_free;
+ }
+
+ copy_from_early_mem(dest, orig_start + to_free, size - to_free);
+
+ if (to_free) {
+ pr_info("Freeing original RAMDISK from [%llx-%llx]\n",
+ orig_start, orig_start + to_free - 1);
+ memblock_free(orig_start, to_free);
+ }
+}
+#else
+static inline void __init relocate_initrd(void)
+{
+}
+#endif
+
u64 __cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = INVALID_HWID };
void __init setup_arch(char **cmdline_p)
{
- setup_processor();
-
- setup_machine_fdt(__fdt_pointer);
+ pr_info("Boot CPU: AArch64 Processor [%08x]\n", read_cpuid_id());
+ sprintf(init_utsname()->machine, ELF_PLATFORM);
init_mm.start_code = (unsigned long) _text;
init_mm.end_code = (unsigned long) _etext;
init_mm.end_data = (unsigned long) _edata;
early_fixmap_init();
early_ioremap_init();
+ setup_machine_fdt(__fdt_pointer);
+
parse_early_param();
/*
acpi_boot_table_init();
paging_init();
+ relocate_initrd();
+
+ kasan_init();
+
request_standard_resources();
early_ioremap_reset();
if (acpi_disabled) {
unflatten_device_tree();
psci_dt_init();
- cpu_read_bootcpu_ops();
-#ifdef CONFIG_SMP
- of_smp_init_cpus();
-#endif
} else {
psci_acpi_init();
- acpi_init_cpus();
}
+ xen_early_init();
-#ifdef CONFIG_SMP
+ cpu_read_bootcpu_ops();
+ smp_init_cpus();
smp_build_mpidr_hash();
-#endif
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
static int __init arm64_device_init(void)
{
- of_iommu_init();
- of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+ if (of_have_populated_dt()) {
+ of_iommu_init();
+ of_platform_populate(NULL, of_default_bus_match_table,
+ NULL, NULL);
+ } else if (acpi_disabled) {
+ pr_crit("Device tree not populated\n");
+ }
return 0;
}
arch_initcall_sync(arm64_device_init);
return 0;
}
subsys_initcall(topology_init);
-
-static const char *hwcap_str[] = {
- "fp",
- "asimd",
- "evtstrm",
- "aes",
- "pmull",
- "sha1",
- "sha2",
- "crc32",
- NULL
-};
-
-#ifdef CONFIG_COMPAT
-static const char *compat_hwcap_str[] = {
- "swp",
- "half",
- "thumb",
- "26bit",
- "fastmult",
- "fpa",
- "vfp",
- "edsp",
- "java",
- "iwmmxt",
- "crunch",
- "thumbee",
- "neon",
- "vfpv3",
- "vfpv3d16",
- "tls",
- "vfpv4",
- "idiva",
- "idivt",
- "vfpd32",
- "lpae",
- "evtstrm"
-};
-
-static const char *compat_hwcap2_str[] = {
- "aes",
- "pmull",
- "sha1",
- "sha2",
- "crc32",
- NULL
-};
-#endif /* CONFIG_COMPAT */
-
-static int c_show(struct seq_file *m, void *v)
-{
- int i, j;
-
- for_each_online_cpu(i) {
- struct cpuinfo_arm64 *cpuinfo = &per_cpu(cpu_data, i);
- u32 midr = cpuinfo->reg_midr;
-
- /*
- * glibc reads /proc/cpuinfo to determine the number of
- * online processors, looking for lines beginning with
- * "processor". Give glibc what it expects.
- */
-#ifdef CONFIG_SMP
- seq_printf(m, "processor\t: %d\n", i);
-#endif
-
- /*
- * Dump out the common processor features in a single line.
- * Userspace should read the hwcaps with getauxval(AT_HWCAP)
- * rather than attempting to parse this, but there's a body of
- * software which does already (at least for 32-bit).
- */
- seq_puts(m, "Features\t:");
- if (personality(current->personality) == PER_LINUX32) {
-#ifdef CONFIG_COMPAT
- for (j = 0; compat_hwcap_str[j]; j++)
- if (compat_elf_hwcap & (1 << j))
- seq_printf(m, " %s", compat_hwcap_str[j]);
-
- for (j = 0; compat_hwcap2_str[j]; j++)
- if (compat_elf_hwcap2 & (1 << j))
- seq_printf(m, " %s", compat_hwcap2_str[j]);
-#endif /* CONFIG_COMPAT */
- } else {
- for (j = 0; hwcap_str[j]; j++)
- if (elf_hwcap & (1 << j))
- seq_printf(m, " %s", hwcap_str[j]);
- }
- seq_puts(m, "\n");
-
- seq_printf(m, "CPU implementer\t: 0x%02x\n",
- MIDR_IMPLEMENTOR(midr));
- seq_printf(m, "CPU architecture: 8\n");
- seq_printf(m, "CPU variant\t: 0x%x\n", MIDR_VARIANT(midr));
- seq_printf(m, "CPU part\t: 0x%03x\n", MIDR_PARTNUM(midr));
- seq_printf(m, "CPU revision\t: %d\n\n", MIDR_REVISION(midr));
- }
-
- return 0;
-}
-
-static void *c_start(struct seq_file *m, loff_t *pos)
-{
- return *pos < 1 ? (void *)1 : NULL;
-}
-
-static void *c_next(struct seq_file *m, void *v, loff_t *pos)
-{
- ++*pos;
- return NULL;
-}
-
-static void c_stop(struct seq_file *m, void *v)
-{
-}
-
-const struct seq_operations cpuinfo_op = {
- .start = c_start,
- .next = c_next,
- .stop = c_stop,
- .show = c_show
-};
Code Review / kvmfornfv.git / blobdiff