From b2473a359763e27567993e7d8f37de82f57a0829 Mon Sep 17 00:00:00 2001 From: Usama Arif Date: Wed, 23 Oct 2024 18:14:26 +0100 Subject: of/fdt: add dt_phys arg to early_init_dt_scan and early_init_dt_verify __pa() is only intended to be used for linear map addresses and using it for initial_boot_params which is in fixmap for arm64 will give an incorrect value. Hence save the physical address when it is known at boot time when calling early_init_dt_scan for arm64 and use it at kexec time instead of converting the virtual address using __pa(). Note that arm64 doesn't need the FDT region reserved in the DT as the kernel explicitly reserves the passed in FDT. Therefore, only a debug warning is fixed with this change. Reported-by: Breno Leitao Suggested-by: Mark Rutland Signed-off-by: Usama Arif Fixes: ac10be5cdbfa ("arm64: Use common of_kexec_alloc_and_setup_fdt()") Link: https://lore.kernel.org/r/20241023171426.452688-1-usamaarif642@gmail.com Signed-off-by: Rob Herring (Arm) --- drivers/of/fdt.c | 14 ++++++++------ drivers/of/kexec.c | 2 +- 2 files changed, 9 insertions(+), 7 deletions(-) (limited to 'drivers/of') diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index d0dbc8183ac4..d3ecf2bdd202 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -457,6 +457,7 @@ int __initdata dt_root_addr_cells; int __initdata dt_root_size_cells; void *initial_boot_params __ro_after_init; +phys_addr_t initial_boot_params_pa __ro_after_init; #ifdef CONFIG_OF_EARLY_FLATTREE @@ -1134,17 +1135,18 @@ static void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) return ptr; } -bool __init early_init_dt_verify(void *params) +bool __init early_init_dt_verify(void *dt_virt, phys_addr_t dt_phys) { - if (!params) + if (!dt_virt) return false; /* check device tree validity */ - if (fdt_check_header(params)) + if (fdt_check_header(dt_virt)) return false; /* Setup flat device-tree pointer */ - initial_boot_params = params; + initial_boot_params = dt_virt; + initial_boot_params_pa = dt_phys; of_fdt_crc32 = crc32_be(~0, initial_boot_params, fdt_totalsize(initial_boot_params)); @@ -1171,11 +1173,11 @@ void __init early_init_dt_scan_nodes(void) early_init_dt_check_for_usable_mem_range(); } -bool __init early_init_dt_scan(void *params) +bool __init early_init_dt_scan(void *dt_virt, phys_addr_t dt_phys) { bool status; - status = early_init_dt_verify(params); + status = early_init_dt_verify(dt_virt, dt_phys); if (!status) return false; diff --git a/drivers/of/kexec.c b/drivers/of/kexec.c index 9ccde2fd77cb..5b924597a4de 100644 --- a/drivers/of/kexec.c +++ b/drivers/of/kexec.c @@ -301,7 +301,7 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image, } /* Remove memory reservation for the current device tree. */ - ret = fdt_find_and_del_mem_rsv(fdt, __pa(initial_boot_params), + ret = fdt_find_and_del_mem_rsv(fdt, initial_boot_params_pa, fdt_totalsize(initial_boot_params)); if (ret == -EINVAL) { pr_err("Error removing memory reservation.\n"); -- cgit v1.2.3