From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.cn.fujitsu.com ([183.91.158.132] helo=heian.cn.fujitsu.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hBGKQ-0007uQ-Jj for kexec@lists.infradead.org; Tue, 02 Apr 2019 10:07:41 +0000 Date: Tue, 2 Apr 2019 19:06:36 +0800 From: Chao Fan Subject: Re: [PATCH v2] x86/boot: Use efi_setup_data for searching RSDP on kexec-ed kernel Message-ID: <20190402110635.GC1555@localhost.localdomain> References: <20190325231000.GA9184@jeru.linux.bs1.fc.nec.co.jp> <20190326135714.GG1867@zn.tnic> <20190327014852.GA3659@MiWiFi-R3L-srv> <73322ba9-e436-68db-7863-afd31607d969@ce.jp.nec.com> <20190328064343.GA1877@MiWiFi-R3L-srv> <20190328074337.GA9470@jeru.linux.bs1.fc.nec.co.jp> <20190328155256.GP22720@zn.tnic> <20190401000837.GA5170@jeru.linux.bs1.fc.nec.co.jp> <20190402094149.GB1555@localhost.localdomain> <20190402095350.GA20733@jeru.linux.bs1.fc.nec.co.jp> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190402095350.GA20733@jeru.linux.bs1.fc.nec.co.jp> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Junichi Nomura Cc: "kasong@redhat.com" , "bhe@redhat.com" , "x86@kernel.org" , "kexec@lists.infradead.org" , "linux-kernel@vger.kernel.org" , Borislav Petkov , Dave Young On Tue, Apr 02, 2019 at 09:53:51AM +0000, Junichi Nomura wrote: >On Tue, Apr 02, 2019 at 05:41:49PM +0800, Chao Fan wrote: >> [ 77.989030] kexec_core: Starting new kernel >> early console in extract_kernel >> input_data: 0x000000017f6033b1 >> input_len: 0x00000000008412d4 >> output: 0x000000017e000000 >> output_len: 0x0000000001e15844 >> kernel_total_size: 0x0000000001e2c000 >> trampoline_32bit: 0x000000000009d000 >> booted via startup_64() >> >> >> Physical KASLR disabled: no suitable memory region! >> ------ >> >> I am not sure whether I have done the right test. >> This guest is booted from EFI. Here we can see the kexeced kernel >> has completed the compressed boot stage. So I think your PATCH works. > >Thanks for testing. If your test bed doesn't boot even with the patch, >you could check what was found as RSDP with a debug patch like below. Oh no, it booted. I just put the compressed stag log. Thanks, Chao Fan > >diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c >--- a/arch/x86/boot/compressed/misc.c >+++ b/arch/x86/boot/compressed/misc.c >@@ -379,6 +379,7 @@ asmlinkage __visible void *extract_kernel(void *rmode, memptr heap, > debug_putaddr(output); > debug_putaddr(output_len); > debug_putaddr(kernel_total_size); >+ debug_putaddr(boot_params->acpi_rsdp_addr); > > #ifdef CONFIG_X86_64 > /* Report address of 32-bit trampoline */ > > _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec