On 08/31/23 at 11:43am, Leizhen (ThunderTown) wrote:
......
> > -static void __init reserve_crashkernel(void)
> > +static void __init arch_reserve_crashkernel(void)
> > {
> > - unsigned long long crash_size, crash_base, total_mem;
> > + unsigned long long crash_base, crash_size, low_size = 0;
> > + char *cmdline = boot_command_line;
> > bool high = false;
> > int ret;
> >
> > if (!IS_ENABLED(CONFIG_KEXEC_CORE))
> > return;
> >
> > - total_mem = memblock_phys_mem_size();
> > -
> > - /* crashkernel=XM */
> > - ret = parse_crashkernel(boot_command_line, total_mem,
> > - &crash_size, &crash_base, NULL, NULL);
> > - if (ret != 0 || crash_size <= 0) {
> > - /* crashkernel=X,high */
> > - ret = parse_crashkernel_high(boot_command_line, total_mem,
> > - &crash_size, &crash_base);
> > - if (ret != 0 || crash_size <= 0)
> > - return;
> > - high = true;
> > - }
> > + ret = parse_crashkernel(cmdline, memblock_phys_mem_size(),
> > + &crash_size, &crash_base,
> > + &low_size, &high);
> > + if (ret)
> > + return;
> >
> > if (xen_pv_domain()) {
> > pr_info("Ignoring crashkernel for a Xen PV domain\n");
> > return;
> > }
> >
> > - /* 0 means: find the address automatically */
> > - if (!crash_base) {
> > - /*
> > - * Set CRASH_ADDR_LOW_MAX upper bound for crash memory,
> > - * crashkernel=x,high reserves memory over 4G, also allocates
> > - * 256M extra low memory for DMA buffers and swiotlb.
> > - * But the extra memory is not required for all machines.
> > - * So try low memory first and fall back to high memory
> > - * unless "crashkernel=size[KMG],high" is specified.
> > - */
> > - if (!high)
> > - crash_base = memblock_phys_alloc_range(crash_size,
> > - CRASH_ALIGN, CRASH_ALIGN,
> > - CRASH_ADDR_LOW_MAX);
> > - if (!crash_base)
> > - crash_base = memblock_phys_alloc_range(crash_size,
> > - CRASH_ALIGN, CRASH_ALIGN,
> > - CRASH_ADDR_HIGH_MAX);
> > - if (!crash_base) {
> > - pr_info("crashkernel reservation failed - No suitable
> > area found.\n");
> > - return;
> > - }
> > - } else {
> > - unsigned long long start;
> > -
> > - start = memblock_phys_alloc_range(crash_size, SZ_1M, crash_base,
> > - crash_base + crash_size);
> > - if (start != crash_base) {
> > - pr_info("crashkernel reservation failed - memory is in
> > use.\n");
> > - return;
> > - }
> > - }
> > -
> > - if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) {
> > - memblock_phys_free(crash_base, crash_size);
> > - return;
> > - }
> > -
> > - pr_info("Reserving %ldMB of memory at %ldMB for crashkernel (System
> > RAM: %ldMB)\n",
> > - (unsigned long)(crash_size >> 20),
> > - (unsigned long)(crash_base >> 20),
> > - (unsigned long)(total_mem >> 20));
> > + reserve_crashkernel_generic(cmdline, crash_size, crash_base,
> > + low_size, high);
> >
> > - crashk_res.start = crash_base;
> > - crashk_res.end = crash_base + crash_size - 1;
> > - insert_resource(&iomem_resource, &crashk_res);
> > + return;
>
> This can be omitted.
Will update, thx.
>
> > }
......
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