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Diffstat (limited to 'arch/arm64/kernel/setup.c')
-rw-r--r--arch/arm64/kernel/setup.c150
1 files changed, 97 insertions, 53 deletions
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index f3067d4d4e35..6bab21f84a9f 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -34,7 +34,6 @@
#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>
@@ -46,6 +45,7 @@
#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>
@@ -61,9 +61,7 @@
#include <asm/tlbflush.h>
#include <asm/traps.h>
#include <asm/memblock.h>
-#include <asm/psci.h>
#include <asm/efi.h>
-#include <asm/virt.h>
#include <asm/xen/hypervisor.h>
unsigned long elf_hwcap __read_mostly;
@@ -131,7 +129,6 @@ bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
}
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
@@ -197,35 +194,11 @@ static void __init smp_build_mpidr_hash(void)
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;
+ u64 features;
+ s64 block;
u32 cwg;
int cls;
@@ -255,8 +228,8 @@ static void __init setup_processor(void)
* for non-negative values. Negative values are reserved.
*/
features = read_cpuid(ID_AA64ISAR0_EL1);
- block = (features >> 4) & 0xf;
- if (!(block & 0x8)) {
+ block = cpuid_feature_extract_field(features, 4);
+ if (block > 0) {
switch (block) {
default:
case 2:
@@ -268,26 +241,36 @@ static void __init setup_processor(void)
}
}
- block = (features >> 8) & 0xf;
- if (block && !(block & 0x8))
+ if (cpuid_feature_extract_field(features, 8) > 0)
elf_hwcap |= HWCAP_SHA1;
- block = (features >> 12) & 0xf;
- if (block && !(block & 0x8))
+ if (cpuid_feature_extract_field(features, 12) > 0)
elf_hwcap |= HWCAP_SHA2;
- block = (features >> 16) & 0xf;
- if (block && !(block & 0x8))
+ if (cpuid_feature_extract_field(features, 16) > 0)
elf_hwcap |= HWCAP_CRC32;
+ block = cpuid_feature_extract_field(features, 20);
+ if (block > 0) {
+ switch (block) {
+ default:
+ case 2:
+ elf_hwcap |= HWCAP_ATOMICS;
+ case 1:
+ /* RESERVED */
+ case 0:
+ break;
+ }
+ }
+
#ifdef CONFIG_COMPAT
/*
* ID_ISAR5_EL1 carries similar information as above, but pertaining to
- * the Aarch32 32-bit execution state.
+ * the AArch32 32-bit execution state.
*/
features = read_cpuid(ID_ISAR5_EL1);
- block = (features >> 4) & 0xf;
- if (!(block & 0x8)) {
+ block = cpuid_feature_extract_field(features, 4);
+ if (block > 0) {
switch (block) {
default:
case 2:
@@ -299,16 +282,13 @@ static void __init setup_processor(void)
}
}
- block = (features >> 8) & 0xf;
- if (block && !(block & 0x8))
+ if (cpuid_feature_extract_field(features, 8) > 0)
compat_elf_hwcap2 |= COMPAT_HWCAP2_SHA1;
- block = (features >> 12) & 0xf;
- if (block && !(block & 0x8))
+ if (cpuid_feature_extract_field(features, 12) > 0)
compat_elf_hwcap2 |= COMPAT_HWCAP2_SHA2;
- block = (features >> 16) & 0xf;
- if (block && !(block & 0x8))
+ if (cpuid_feature_extract_field(features, 16) > 0)
compat_elf_hwcap2 |= COMPAT_HWCAP2_CRC32;
#endif
}
@@ -359,6 +339,67 @@ static void __init request_standard_resources(void)
}
}
+#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;
+
+ /* 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)
@@ -392,6 +433,7 @@ void __init setup_arch(char **cmdline_p)
acpi_boot_table_init();
paging_init();
+ relocate_initrd();
request_standard_resources();
early_ioremap_reset();
@@ -405,10 +447,8 @@ void __init setup_arch(char **cmdline_p)
xen_early_init();
cpu_read_bootcpu_ops();
-#ifdef CONFIG_SMP
smp_init_cpus();
smp_build_mpidr_hash();
-#endif
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
@@ -427,8 +467,13 @@ void __init setup_arch(char **cmdline_p)
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);
@@ -456,6 +501,7 @@ static const char *hwcap_str[] = {
"sha1",
"sha2",
"crc32",
+ "atomics",
NULL
};
@@ -508,9 +554,7 @@ static int c_show(struct seq_file *m, void *v)
* 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.
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-20 01:17:24 +0000