From 23fa18eaa71266feff7ba8d83022d9e1cc83c65a Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:42:03 +0000
Subject: [PATCH] disable pwm7
---
kernel/arch/arm64/kernel/setup.c | 120 +++++++++++++++++++++++++++++++++++------------------------
1 files changed, 71 insertions(+), 49 deletions(-)
diff --git a/kernel/arch/arm64/kernel/setup.c b/kernel/arch/arm64/kernel/setup.c
index f654b44..a6ec917 100644
--- a/kernel/arch/arm64/kernel/setup.c
+++ b/kernel/arch/arm64/kernel/setup.c
@@ -1,20 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Based on arch/arm/kernel/setup.c
*
* Copyright (C) 1995-2001 Russell King
* Copyright (C) 2012 ARM Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/acpi.h>
@@ -26,7 +15,6 @@
#include <linux/initrd.h>
#include <linux/console.h>
#include <linux/cache.h>
-#include <linux/bootmem.h>
#include <linux/screen_info.h>
#include <linux/init.h>
#include <linux/kexec.h>
@@ -59,7 +47,6 @@
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
#include <asm/traps.h>
-#include <asm/memblock.h>
#include <asm/efi.h>
#include <asm/xen/hypervisor.h>
#include <asm/mmu_context.h>
@@ -68,14 +55,6 @@
static struct resource *standard_resources;
phys_addr_t __fdt_pointer __initdata;
-
-/* Vendor stub */
-unsigned int boot_reason;
-EXPORT_SYMBOL_GPL(boot_reason);
-
-/* Vendor stub */
-unsigned int cold_boot;
-EXPORT_SYMBOL_GPL(cold_boot);
/*
* Standard memory resources
@@ -106,7 +85,7 @@
void __init smp_setup_processor_id(void)
{
u64 mpidr = read_cpuid_mpidr() & MPIDR_HWID_BITMASK;
- cpu_logical_map(0) = mpidr;
+ set_cpu_logical_map(0, mpidr);
/*
* clear __my_cpu_offset on boot CPU to avoid hang caused by
@@ -189,6 +168,21 @@
pr_warn("Large number of MPIDR hash buckets detected\n");
}
+static void *early_fdt_ptr __initdata;
+
+void __init *get_early_fdt_ptr(void)
+{
+ return early_fdt_ptr;
+}
+
+asmlinkage void __init early_fdt_map(u64 dt_phys)
+{
+ int fdt_size;
+
+ early_fixmap_init();
+ early_fdt_ptr = fixmap_remap_fdt(dt_phys, &fdt_size, PAGE_KERNEL);
+}
+
static void __init setup_machine_fdt(phys_addr_t dt_phys)
{
int size;
@@ -225,6 +219,7 @@
struct memblock_region *region;
struct resource *res;
unsigned long i = 0;
+ size_t res_size;
kernel_code.start = __pa_symbol(_text);
kernel_code.end = __pa_symbol(__init_begin - 1);
@@ -232,10 +227,12 @@
kernel_data.end = __pa_symbol(_end - 1);
num_standard_resources = memblock.memory.cnt;
- standard_resources = alloc_bootmem_low(num_standard_resources *
- sizeof(*standard_resources));
+ res_size = num_standard_resources * sizeof(*standard_resources);
+ standard_resources = memblock_alloc(res_size, SMP_CACHE_BYTES);
+ if (!standard_resources)
+ panic("%s: Failed to allocate %zu bytes\n", __func__, res_size);
- for_each_memblock(memory, region) {
+ for_each_mem_region(region) {
res = &standard_resources[i++];
if (memblock_is_nomap(region)) {
res->name = "reserved";
@@ -275,7 +272,7 @@
if (!memblock_is_region_reserved(mem->start, mem_size))
continue;
- for_each_reserved_mem_region(j, &r_start, &r_end) {
+ for_each_reserved_mem_range(j, &r_start, &r_end) {
resource_size_t start, end;
start = max(PFN_PHYS(PFN_DOWN(r_start)), mem->start);
@@ -294,7 +291,12 @@
u64 __cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = INVALID_HWID };
-void __init setup_arch(char **cmdline_p)
+u64 cpu_logical_map(unsigned int cpu)
+{
+ return __cpu_logical_map[cpu];
+}
+
+void __init __no_sanitize_address setup_arch(char **cmdline_p)
{
init_mm.start_code = (unsigned long) _text;
init_mm.end_code = (unsigned long) _etext;
@@ -302,6 +304,13 @@
init_mm.brk = (unsigned long) _end;
*cmdline_p = boot_command_line;
+
+ /*
+ * If know now we are going to need KPTI then use non-global
+ * mappings from the start, avoiding the cost of rewriting
+ * everything later.
+ */
+ arm64_use_ng_mappings = kaslr_requires_kpti();
early_fixmap_init();
early_ioremap_init();
@@ -330,6 +339,10 @@
xen_early_init();
efi_init();
+
+ if (!efi_enabled(EFI_BOOT) && ((u64)_text % MIN_KIMG_ALIGN) != 0)
+ pr_warn(FW_BUG "Kernel image misaligned at boot, please fix your bootloader!");
+
arm64_memblock_init();
paging_init();
@@ -355,12 +368,12 @@
else
psci_acpi_init();
- cpu_read_bootcpu_ops();
+ init_bootcpu_ops();
smp_init_cpus();
smp_build_mpidr_hash();
/* Init percpu seeds for random tags after cpus are set up. */
- kasan_init_tags();
+ kasan_init_sw_tags();
#ifdef CONFIG_ARM64_SW_TTBR0_PAN
/*
@@ -368,22 +381,26 @@
* faults in case uaccess_enable() is inadvertently called by the init
* thread.
*/
- init_task.thread_info.ttbr0 = __pa_symbol(empty_zero_page);
+ init_task.thread_info.ttbr0 = phys_to_ttbr(__pa_symbol(reserved_pg_dir));
#endif
-#ifdef CONFIG_VT
-#if defined(CONFIG_VGA_CONSOLE)
- conswitchp = &vga_con;
-#elif defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
-#endif
-#endif
if (boot_args[1] || boot_args[2] || boot_args[3]) {
pr_err("WARNING: x1-x3 nonzero in violation of boot protocol:\n"
"\tx1: %016llx\n\tx2: %016llx\n\tx3: %016llx\n"
"This indicates a broken bootloader or old kernel\n",
boot_args[1], boot_args[2], boot_args[3]);
}
+}
+
+static inline bool cpu_can_disable(unsigned int cpu)
+{
+#ifdef CONFIG_HOTPLUG_CPU
+ const struct cpu_operations *ops = get_cpu_ops(cpu);
+
+ if (ops && ops->cpu_can_disable)
+ return ops->cpu_can_disable(cpu);
+#endif
+ return false;
}
static int __init topology_init(void)
@@ -395,7 +412,7 @@
for_each_possible_cpu(i) {
struct cpu *cpu = &per_cpu(cpu_data.cpu, i);
- cpu->hotpluggable = 1;
+ cpu->hotpluggable = cpu_can_disable(i);
register_cpu(cpu, i);
}
@@ -403,31 +420,36 @@
}
subsys_initcall(topology_init);
-/*
- * Dump out kernel offset information on panic.
- */
-static int dump_kernel_offset(struct notifier_block *self, unsigned long v,
- void *p)
+static void dump_kernel_offset(void)
{
const unsigned long offset = kaslr_offset();
if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && offset > 0) {
pr_emerg("Kernel Offset: 0x%lx from 0x%lx\n",
offset, KIMAGE_VADDR);
+ pr_emerg("PHYS_OFFSET: 0x%llx\n", PHYS_OFFSET);
} else {
pr_emerg("Kernel Offset: disabled\n");
}
+}
+
+static int arm64_panic_block_dump(struct notifier_block *self,
+ unsigned long v, void *p)
+{
+ dump_kernel_offset();
+ dump_cpu_features();
+ dump_mem_limit();
return 0;
}
-static struct notifier_block kernel_offset_notifier = {
- .notifier_call = dump_kernel_offset
+static struct notifier_block arm64_panic_block = {
+ .notifier_call = arm64_panic_block_dump
};
-static int __init register_kernel_offset_dumper(void)
+static int __init register_arm64_panic_block(void)
{
atomic_notifier_chain_register(&panic_notifier_list,
- &kernel_offset_notifier);
+ &arm64_panic_block);
return 0;
}
-__initcall(register_kernel_offset_dumper);
+device_initcall(register_arm64_panic_block);
--
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