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Date: Fri, 22 Mar 2019 16:23:28 +0100 From: Borislav Petkov <bp@...en8.de> To: Junichi Nomura <j-nomura@...jp.nec.com> Cc: "fanc.fnst@...fujitsu.com" <fanc.fnst@...fujitsu.com>, "bp@...e.de" <bp@...e.de>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "x86@...nel.org" <x86@...nel.org> Subject: Re: [PATCH] x86/boot: Use EFI setup data if provided On Fri, Mar 22, 2019 at 11:03:43AM +0000, Junichi Nomura wrote: > Commit 3a63f70bf4c3a ("x86/boot: Early parse RSDP and save it in > boot_params") broke kexec boot on EFI systems. efi_get_rsdp_addr() > in the early parsing code tries to search RSDP from EFI table but > whose address is virtual. > > Since kexec(1) provides physical address of config_table via boot_params, > efi_get_rsdp_addr() should look for setup_data in the same way as > efi_systab_init() in arch/x86/platform/efi/efi.c does. If the kexec kernel should continue to use efi_systab_init() then you should make efi_get_rsdp_addr() exit early in the kexec-ed kernel. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.
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