void *_dtb_early_va __initdata;
uintptr_t _dtb_early_pa __initdata;
-static phys_addr_t dma32_phys_limit __initdata;
+phys_addr_t dma32_phys_limit __initdata;
static void __init zone_sizes_init(void)
{
}
#endif /* CONFIG_MMU */
-/* Reserve 128M low memory by default for swiotlb buffer */
-#define DEFAULT_CRASH_KERNEL_LOW_SIZE (128UL << 20)
-
-static int __init reserve_crashkernel_low(unsigned long long low_size)
-{
- unsigned long long low_base;
-
- low_base = memblock_phys_alloc_range(low_size, PMD_SIZE, 0, dma32_phys_limit);
- if (!low_base) {
- pr_err("cannot allocate crashkernel low memory (size:0x%llx).\n", low_size);
- return -ENOMEM;
- }
-
- pr_info("crashkernel low memory reserved: 0x%016llx - 0x%016llx (%lld MB)\n",
- low_base, low_base + low_size, low_size >> 20);
-
- crashk_low_res.start = low_base;
- crashk_low_res.end = low_base + low_size - 1;
-
- return 0;
-}
-
/*
* reserve_crashkernel() - reserves memory for crash kernel
*
* line parameter. The memory reserved is used by dump capture kernel when
* primary kernel is crashing.
*/
-static void __init reserve_crashkernel(void)
+static void __init arch_reserve_crashkernel(void)
{
- unsigned long long crash_base = 0;
- unsigned long long crash_size = 0;
- unsigned long long crash_low_size = 0;
- unsigned long search_start = memblock_start_of_DRAM();
- unsigned long search_end = (unsigned long)dma32_phys_limit;
+ unsigned long long low_size = 0;
+ unsigned long long crash_base, crash_size;
char *cmdline = boot_command_line;
- bool fixed_base = false;
bool high = false;
-
- int ret = 0;
+ int ret;
if (!IS_ENABLED(CONFIG_KEXEC_CORE))
return;
- /*
- * Don't reserve a region for a crash kernel on a crash kernel
- * since it doesn't make much sense and we have limited memory
- * resources.
- */
- if (is_kdump_kernel()) {
- pr_info("crashkernel: ignoring reservation request\n");
- return;
- }
ret = parse_crashkernel(cmdline, memblock_phys_mem_size(),
- &crash_size, &crash_base);
- if (ret == -ENOENT) {
- /* Fallback to crashkernel=X,[high,low] */
- ret = parse_crashkernel_high(cmdline, 0, &crash_size, &crash_base);
- if (ret || !crash_size)
- return;
-
- /*
- * crashkernel=Y,low is valid only when crashkernel=X,high
- * is passed.
- */
- ret = parse_crashkernel_low(cmdline, 0, &crash_low_size, &crash_base);
- if (ret == -ENOENT)
- crash_low_size = DEFAULT_CRASH_KERNEL_LOW_SIZE;
- else if (ret)
- return;
-
- search_start = (unsigned long)dma32_phys_limit;
- search_end = memblock_end_of_DRAM();
- high = true;
- } else if (ret || !crash_size) {
- /* Invalid argument value specified */
+ &crash_size, &crash_base,
+ &low_size, &high);
+ if (ret)
return;
- }
-
- crash_size = PAGE_ALIGN(crash_size);
-
- if (crash_base) {
- fixed_base = true;
- search_start = crash_base;
- search_end = crash_base + crash_size;
- }
-
- /*
- * Current riscv boot protocol requires 2MB alignment for
- * RV64 and 4MB alignment for RV32 (hugepage size)
- *
- * Try to alloc from 32bit addressible physical memory so that
- * swiotlb can work on the crash kernel.
- */
- crash_base = memblock_phys_alloc_range(crash_size, PMD_SIZE,
- search_start, search_end);
- if (crash_base == 0) {
- /*
- * For crashkernel=size[KMG]@offset[KMG], print out failure
- * message if can't reserve the specified region.
- */
- if (fixed_base) {
- pr_warn("crashkernel: allocating failed with given size@offset\n");
- return;
- }
-
- if (high) {
- /*
- * For crashkernel=size[KMG],high, if the first attempt was
- * for high memory, fall back to low memory.
- */
- search_start = memblock_start_of_DRAM();
- search_end = (unsigned long)dma32_phys_limit;
- } else {
- /*
- * For crashkernel=size[KMG], if the first attempt was for
- * low memory, fall back to high memory, the minimum required
- * low memory will be reserved later.
- */
- search_start = (unsigned long)dma32_phys_limit;
- search_end = memblock_end_of_DRAM();
- crash_low_size = DEFAULT_CRASH_KERNEL_LOW_SIZE;
- }
-
- crash_base = memblock_phys_alloc_range(crash_size, PMD_SIZE,
- search_start, search_end);
- if (crash_base == 0) {
- pr_warn("crashkernel: couldn't allocate %lldKB\n",
- crash_size >> 10);
- return;
- }
- }
-
- if ((crash_base >= dma32_phys_limit) && crash_low_size &&
- reserve_crashkernel_low(crash_low_size)) {
- memblock_phys_free(crash_base, crash_size);
- return;
- }
-
- pr_info("crashkernel: reserved 0x%016llx - 0x%016llx (%lld MB)\n",
- crash_base, crash_base + crash_size, crash_size >> 20);
- crashk_res.start = crash_base;
- crashk_res.end = crash_base + crash_size - 1;
+ reserve_crashkernel_generic(cmdline, crash_size, crash_base,
+ low_size, high);
}
void __init paging_init(void)
arch_numa_init();
sparse_init();
zone_sizes_init();
- reserve_crashkernel();
+ arch_reserve_crashkernel();
memblock_dump_all();
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff