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From: Dave Young <dyoung@redhat.com>
To: Boris Petkov <bp@alien8.de>
Cc: Junichi Nomura <j-nomura@ce.jp.nec.com>,
	"fanc.fnst@cn.fujitsu.com" <fanc.fnst@cn.fujitsu.com>,
	"bp@suse.de" <bp@suse.de>, "bhe@redhat.com" <bhe@redhat.com>,
	"kasong@redhat.com" <kasong@redhat.com>,
	"x86@kernel.org" <x86@kernel.org>,
	"kexec@lists.infradead.org" <kexec@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2] x86/boot: Use EFI setup data if provided
Date: Mon, 25 Mar 2019 18:15:09 +0800
Message-ID: <20190325101509.GA13160@dhcp-128-65.nay.redhat.com> (raw)
In-Reply-To: <51D9A7D1-49BF-4679-B102-0FC5AC300C9F@alien8.de>

On 03/25/19 at 09:54am, Boris Petkov wrote:
> On March 25, 2019 9:27:21 AM GMT+01:00, Junichi Nomura <j-nomura@ce.jp.nec.com> wrote:
> >On 3/25/19 3:59 PM, Dave Young wrote:
> >> On 03/25/19 at 06:47am, Junichi Nomura wrote:
> >>> On 3/25/19 3:19 PM, Dave Young wrote:
> >>>> On 03/25/19 at 02:01pm, Dave Young wrote:
> >>>> I think normally people do not see this bug, because kernel will
> >set the
> >>>> rsdp in boot_params->acpi_rsdp_addr.  Maybe you are testing with
> >>>
> >>> I think it's only done for file-based kexec interface.
> >> 
> >> Saw Kairui's another reply, yes, kexec-tools need a patch to fill the
> >> value as well then.
> >> 
> >> I would vote for a repost of your old patch with some #ifdef
> >
> >Thanks for comments, Dave, Kairui and Baoquan.
> >
> >The problem for me is it's a regression in v5.1-rc1, that breaks
> >existing setup. If early parsing of RSDP is required only for newly
> >supported configuration, I'm fine such configuration requires
> >new tools or new options.
> >
> >This is the 1st version plus #ifdef around the EFI code.
> 
> I'm going to repeat that again until you get it:
> 
> 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.

In that way, early parsing will fail in kexeced kernel, am I missing
something?  The early code become complicated but since we have already
the early acpi parsing why not to make it consistent in kexeced kernel?

Thanks
Dave

  parent reply index

Thread overview: 90+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-22 11:03 [PATCH] " Junichi Nomura
2019-03-22 15:23 ` Borislav Petkov
2019-03-25  0:27   ` Junichi Nomura
2019-03-25  6:01     ` Dave Young
2019-03-25  6:19       ` Dave Young
2019-03-25  6:45         ` Kairui Song
2019-03-25  6:47         ` Junichi Nomura
2019-03-25  6:59           ` Dave Young
2019-03-25  8:27             ` [PATCH v2] " Junichi Nomura
2019-03-25  8:54               ` Boris Petkov
2019-03-25  9:25                 ` [PATCH v2] x86/boot: Don't try to search RSDP from EFI when kexec-booted Junichi Nomura
2019-03-25 10:15                 ` Dave Young [this message]
2019-03-25 10:36                   ` [PATCH v2] x86/boot: Use EFI setup data if provided Junichi Nomura
2019-03-25 11:16                     ` Dave Young
2019-03-25 12:01                     ` Borislav Petkov
2019-03-25 12:23                       ` Dave Young
2019-03-25 12:32                         ` Borislav Petkov
2019-03-25 23:10                           ` Junichi Nomura
2019-03-26 12:46                             ` Dave Young
2019-03-26 13:57                             ` Borislav Petkov
2019-03-27  1:48                               ` bhe
2019-03-27 12:14                                 ` Borislav Petkov
2019-03-28  4:17                                 ` Junichi Nomura
2019-03-28  6:26                                   ` Chao Fan
2019-03-28  6:43                                   ` bhe
2019-03-28  7:43                                     ` Junichi Nomura
2019-03-28 15:52                                       ` Borislav Petkov
2019-03-29  3:05                                         ` Junichi Nomura
2019-03-29  8:39                                           ` Borislav Petkov
2019-03-29  9:05                                             ` Chao Fan
2019-03-29  9:16                                               ` Borislav Petkov
2019-03-29  9:37                                                 ` Junichi Nomura
2019-03-29  9:44                                                   ` Chao Fan
2019-03-29  9:56                                                     ` Junichi Nomura
2019-03-29  7:20                                         ` [PATCH] x86/boot: Use efi_setup_data for searching RSDP on kexec-ed kernel Junichi Nomura
2019-03-29  7:49                                           ` bhe
2019-03-29  8:29                                           ` Chao Fan
2019-03-29  8:39                                             ` Junichi Nomura
2019-03-29  9:18                                               ` Chao Fan
2019-03-29  9:16                                             ` bhe
2019-03-29  9:20                                               ` Chao Fan
2019-04-01  0:08                                         ` [PATCH v2] " Junichi Nomura
2019-04-02  9:41                                           ` Chao Fan
2019-04-02  9:53                                             ` Junichi Nomura
2019-04-02 11:06                                               ` Chao Fan
2019-04-02 10:22                                                 ` Junichi Nomura
2019-04-02 12:03                                           ` Dave Young
2019-04-03  5:35                                             ` Chao Fan
2019-04-03  5:53                                               ` Dave Young
2019-04-03  6:39                                                 ` Dave Young
2019-04-03  7:30                                                   ` Chao Fan
2019-04-03  7:50                                                     ` bhe
2019-04-03  8:23                                                       ` Dave Young
2019-04-03  8:26                                                         ` Dave Young
2019-04-03 16:14                                                           ` Borislav Petkov
2019-04-04  1:02                                                             ` Chao Fan
2019-04-03  9:28                                                       ` Chao Fan
2019-04-03  7:21                                                 ` Chao Fan
2019-04-03  8:09                                                   ` Dave Young
2019-04-03  8:23                                                     ` Chao Fan
2019-04-03  9:02                                                       ` Chao Fan
2019-04-03  9:39                                                         ` Chao Fan
2019-04-04  1:23                                                         ` Junichi Nomura
2019-04-04  2:52                                                           ` Dave Young
2019-04-04  3:00                                                             ` bhe
2019-04-04  3:10                                                               ` bhe
2019-04-04  3:22                                                                 ` Dave Young
2019-04-04  6:41                                                                   ` Dave Young
2019-04-04  7:20                                                                     ` Chao Fan
2019-04-04  7:41                                                                       ` Dave Young
2019-04-04  7:48                                                                         ` Chao Fan
2019-04-04 12:22                                                                         ` Borislav Petkov
2019-04-04 14:08                                                                           ` Dave Young
2019-04-03  8:18                                                   ` Dave Young
2019-04-02 10:25                                         ` [PATCH v3] " Junichi Nomura
2019-04-04  7:32                                           ` Dave Young
2019-04-04 12:24                                             ` Borislav Petkov
2019-04-04 14:12                                               ` Dave Young
2019-04-04 14:41                                                 ` Borislav Petkov
2019-04-05  1:36                                                   ` Dave Young
2019-04-05  4:19                                             ` Junichi Nomura
2019-03-28 23:11                                       ` [PATCH v2] x86/boot: Use EFI setup data if provided bhe
2019-03-29  3:34                                         ` Junichi Nomura
2019-03-29  3:52                                           ` bhe
2019-03-29  5:16                                             ` Junichi Nomura
2019-03-25  7:27   ` [PATCH] " Baoquan He
2019-03-25  7:53     ` Borislav Petkov
2019-03-25  8:21       ` Baoquan He
2019-03-25  8:43         ` Thomas Gleixner
2019-03-25  9:03           ` Baoquan He

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