From: Chao Fan <fanc.fnst@cn.fujitsu.com>
To: Borislav Petkov <bp@alien8.de>
Cc: Guenter Roeck <linux@roeck-us.net>, <tglx@linutronix.de>,
<linux-kernel@vger.kernel.org>, <kirill.shutemov@linux.intel.com>,
<mingo@redhat.com>, <thomas.lendacky@amd.com>,
<yamada.masahiro@socionext.com>, <caoj.fnst@cn.fujitsu.com>,
<jgross@suse.com>, <mingo@kernel.org>, <keescook@chromium.org>,
<x86@kernel.org>, <hpa@zytor.com>,
<linux-tip-commits@vger.kernel.org>
Subject: Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
Date: Mon, 11 Feb 2019 09:07:57 +0800 [thread overview]
Message-ID: <20190211010756.GA1544@localhost.localdomain> (raw)
In-Reply-To: <20190208191024.GL674@zn.tnic>
On Fri, Feb 08, 2019 at 08:10:24PM +0100, Borislav Petkov wrote:
>On Fri, Feb 08, 2019 at 11:02:48AM -0800, Guenter Roeck wrote:
>> Hi,
>>
>> On Fri, Feb 01, 2019 at 03:01:11AM -0800, tip-bot for Chao Fan wrote:
>> > Commit-ID: 3a63f70bf4c3a17f5d9c9bf3bc3288a23bdfefce
>> > Gitweb: https://git.kernel.org/tip/3a63f70bf4c3a17f5d9c9bf3bc3288a23bdfefce
>> > Author: Chao Fan <fanc.fnst@cn.fujitsu.com>
>> > AuthorDate: Wed, 23 Jan 2019 19:08:48 +0800
>> > Committer: Borislav Petkov <bp@suse.de>
>> > CommitDate: Fri, 1 Feb 2019 11:52:55 +0100
>> >
>> > x86/boot: Early parse RSDP and save it in boot_params
>> >
>> > The RSDP is needed by KASLR so parse it early and save it in
>> > boot_params.acpi_rsdp_addr, before KASLR setup runs.
>> >
>> > RSDP is needed by other kernel facilities so have the parsing code
>> > built-in instead of a long "depends on" line in Kconfig.
>> >
>> > [ bp:
>> > - Trim commit message and comments
>> > - Add CONFIG_ACPI dependency in the Makefile
>> > - Move ->acpi_rsdp_addr assignment with the rest of boot_params massaging in extract_kernel().
>> > ]
>> >
>>
>> This patch causes x86_64 boots with efi32 bios to crash early and hard
>> (before any console output is seen).
>>
>> Sample qemu command line:
>>
>> qemu-system-x86_64 -kernel arch/x86/boot/bzImage -M q35 -cpu SandyBridge \
>> -no-reboot -snapshot -smp 4 \
>> -bios OVMF-pure-efi-32.fd \
>> -m 1G \
>> -usb -device usb-storage,drive=d0 \
>> -drive file=rootfs.squashfs,if=none,id=d0,format=raw \
>> --append 'earlycon=uart8250,io,0x3f8,9600n8 root=/dev/sda rootwait panic=-1 console=ttyS0' \
>> -nographic
>>
>> This is with qemu 3.1, though details other than "-bios OVMF-pure-efi-32.fd"
>> don't really matter.
>>
>> Files used above are available from https://github.com/groeck/linux-build-test/.
>>
>> The patch can not be reverted alone, but
>>
>> Revert "x86/boot/KASLR: Limit KASLR to extract the kernel in immovable memory only"
>> Revert "x86/boot: Parse SRAT table and count immovable memory regions"
>> Revert "x86/boot: Early parse RSDP and save it in boot_params"
>>
>> fixes the problem.
>
>Does it per chance at least continue booting if you return 0 and early
>from efi_get_rsdp_addr() ?
>
>Chao, pls take a look.
Sorry for delay, last several days were holiday, so I was away from
keyboard. I will take a look.
Thanks,
Chao Fan
>
>Thx.
>
>--
>Regards/Gruss,
> Boris.
>
>Good mailing practices for 400: avoid top-posting and trim the reply.
>
>
next prev parent reply other threads:[~2019-02-11 1:08 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-23 11:08 [PATCH v16 0/7] Parse ACPI table and limit KASLR to choosing immovable memory Chao Fan
2019-01-23 11:08 ` [PATCH v16 1/7] x86/boot: Copy kstrtoull() to boot/string.c instead of simple_strtoull() Chao Fan
2019-02-01 10:58 ` [tip:x86/boot] x86/boot: Copy kstrtoull() to boot/string.c tip-bot for Chao Fan
2019-01-23 11:08 ` [PATCH v16 2/7] x86/boot: Introduce get_acpi_rsdp() to parse RSDP in cmdline from KEXEC Chao Fan
2019-02-01 10:59 ` [tip:x86/boot] x86/boot: Add "acpi_rsdp=" early parsing tip-bot for Chao Fan
2019-01-23 11:08 ` [PATCH v16 3/7] x86/boot: Introduce efi_get_rsdp_addr() to find RSDP from EFI table Chao Fan
2019-02-01 10:59 ` [tip:x86/boot] x86/boot: Search for RSDP in the EFI tables tip-bot for Chao Fan
2019-01-23 11:08 ` [PATCH v16 4/7] x86/boot: Introduce bios_get_rsdp_addr() to search RSDP in memory Chao Fan
2019-02-01 11:00 ` [tip:x86/boot] x86/boot: Search for " tip-bot for Chao Fan
2019-01-23 11:08 ` [PATCH v16 5/7] x86/boot: Early parse RSDP and fill in boot_params Chao Fan
2019-01-23 11:17 ` Chao Fan
2019-02-01 11:01 ` [tip:x86/boot] x86/boot: Early parse RSDP and save it " tip-bot for Chao Fan
2019-02-08 19:02 ` Guenter Roeck
2019-02-08 19:10 ` Borislav Petkov
2019-02-08 20:44 ` Guenter Roeck
2019-02-08 21:53 ` Borislav Petkov
2019-02-11 0:22 ` Borislav Petkov
2019-02-11 1:33 ` Chao Fan
2019-02-11 9:46 ` Ard Biesheuvel
2019-02-11 9:55 ` Chao Fan
2019-02-11 9:57 ` Ard Biesheuvel
2019-02-11 10:10 ` Chao Fan
2019-02-11 10:17 ` Ard Biesheuvel
2019-02-11 10:24 ` Borislav Petkov
2019-02-11 10:33 ` Ard Biesheuvel
2019-02-11 10:42 ` Borislav Petkov
2019-02-11 10:46 ` Ard Biesheuvel
2019-02-11 11:04 ` Borislav Petkov
2019-02-11 11:55 ` Ard Biesheuvel
2019-02-11 12:16 ` Borislav Petkov
2019-02-11 11:20 ` Borislav Petkov
2019-02-11 13:21 ` Chao Fan
2019-02-13 1:54 ` Chao Fan
2019-02-13 7:36 ` Boris Petkov
2019-02-13 7:58 ` Chao Fan
2019-02-13 8:01 ` Ard Biesheuvel
2019-02-13 8:12 ` Chao Fan
2019-02-13 8:50 ` Borislav Petkov
2019-02-13 8:57 ` Chao Fan
2019-02-11 1:07 ` Chao Fan [this message]
2019-02-11 9:30 ` Chao Fan
2019-02-11 10:08 ` Borislav Petkov
2019-02-11 13:03 ` Chao Fan
2019-02-11 14:08 ` Guenter Roeck
2019-02-13 9:06 ` [tip:x86/boot] x86/boot: Correct RSDP parsing with 32-bit EFI tip-bot for Borislav Petkov
2019-02-13 11:27 ` tip-bot for Borislav Petkov
2019-01-23 11:08 ` [PATCH v16 6/7] x86/boot: Parse SRAT address from RSDP and store immovable memory Chao Fan
2019-02-01 11:01 ` [tip:x86/boot] x86/boot: Parse SRAT table and count immovable memory regions tip-bot for Chao Fan
2019-01-23 11:08 ` [PATCH v16 7/7] x86/boot/KASLR: Limit KASLR to extracting kernel in immovable memory Chao Fan
2019-02-01 11:02 ` [tip:x86/boot] x86/boot/KASLR: Limit KASLR to extract the kernel in immovable memory only tip-bot for Chao Fan
2019-01-28 17:51 ` [PATCH v16 0/7] Parse ACPI table and limit KASLR to choosing immovable memory Borislav Petkov
2019-01-30 5:58 ` Chao Fan
2019-01-30 11:22 ` [PATCH] x86/boot: Build the command line parsing code unconditionally (was: Re: [PATCH v16 0/7] Parse ACPI table and limit KASLR to choosing immovable memory) Borislav Petkov
2019-02-01 10:57 ` [tip:x86/boot] x86/boot: Build the command line parsing code unconditionally tip-bot for Borislav Petkov
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