From: Dave Young Date: Fri, 20 Dec 2013 10:02:22 +0000 (+0800) Subject: x86: Reserve setup_data ranges late after parsing memmap cmdline X-Git-Tag: Ubuntu-5.4-5.4.0-11.14~15178^2~4 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=77ea8c948953a90401e436e7c05973b2d5529804;p=mirror_ubuntu-focal-kernel.git x86: Reserve setup_data ranges late after parsing memmap cmdline Currently e820_reserve_setup_data() is called before parsing early params, it works in normal case. But for memmap=exactmap, the final memory ranges are created after parsing memmap= cmdline params, so the previous e820_reserve_setup_data() has no effect. For example, setup_data ranges will still be marked as normal system ram, thus when later sysfs driver ioremap them kernel will warn about mapping normal ram. This patch fix it by moving the e820_reserve_setup_data() callback after parsing early params so they can be set as reserved ranges and later ioremap will be fine with it. Signed-off-by: Dave Young Acked-by: Borislav Petkov Tested-by: Toshi Kani Signed-off-by: Matt Fleming --- diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 24536f7a0ae6..be4b456e444b 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -927,8 +927,6 @@ void __init setup_arch(char **cmdline_p) iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1; setup_memory_map(); parse_setup_data(); - /* update the e820_saved too */ - e820_reserve_setup_data(); copy_edd(); @@ -990,6 +988,8 @@ void __init setup_arch(char **cmdline_p) early_dump_pci_devices(); #endif + /* update the e820_saved too */ + e820_reserve_setup_data(); finish_e820_parsing(); if (efi_enabled(EFI_BOOT))