From: Baoquan He <bhe@redhat.com>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Ingo Molnar <mingo@kernel.org>, Mike Galbraith <efault@gmx.de>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Dave Young <dyoung@redhat.com>,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org, Andy Lutomirski <luto@amacapital.net>,
linux-mm@kvack.org, Vivek Goyal <vgoyal@redhat.com>,
Cyrill Gorcunov <gorcunov@openvz.org>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@suse.de>,
Linus Torvalds <torvalds@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: Re: [PATCH 4.14 023/159] mm/sparsemem: Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y
Date: Fri, 26 Jan 2018 10:48:41 +0800 [thread overview]
Message-ID: <20180126024841.GA1759@localhost.localdomain> (raw)
In-Reply-To: <20180125155043.nj5b26yxutds7f37@node.shutemov.name>
On 01/25/18 at 06:50pm, Kirill A. Shutemov wrote:
> On Wed, Jan 17, 2018 at 01:24:54PM +0800, Baoquan He wrote:
> > Hi Kirill,
> >
> > I setup qemu 2.9.0 to test 5-level on kexec/kdump support. While both
> > kexec and kdump reset to BIOS immediately after triggering. I saw your
> > patch adding 5-level paging support for kexec. Wonder if your test
> > succeeded to jump into kexec/kdump kernel, and what else I need to
> > make it. By the way, I just tested the latest upstream kernel.
> >
> > commit 7f6890418 x86/kexec: Add 5-level paging support
> >
> > [ ~]$ qemu-system-x86_64 --version
> > QEMU emulator version 2.9.0(qemu-2.9.0-1.fc26.1)
> > Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
>
> Sorry for delay.
>
> I didn't tested it in 5-level paging mode :-/
>
> The patch below helps in my case. Could you test it?
Thanks, Kirill.
Seems it doesn't work. I have some confusion about the process, will
send you a private mail.
Thanks
Baoquan
>
> diff --git a/arch/x86/kernel/relocate_kernel_64.S b/arch/x86/kernel/relocate_kernel_64.S
> index 307d3bac5f04..65a98cf2307d 100644
> --- a/arch/x86/kernel/relocate_kernel_64.S
> +++ b/arch/x86/kernel/relocate_kernel_64.S
> @@ -126,8 +126,12 @@ identity_mapped:
> /*
> * Set cr4 to a known state:
> * - physical address extension enabled
> + * - 5-level paging, if enabled
> */
> movl $X86_CR4_PAE, %eax
> +#ifdef CONFIG_X86_5LEVEL
> + orl $X86_CR4_LA57, %eax
> +#endif
> movq %rax, %cr4
>
> jmp 1f
> --
> Kirill A. Shutemov
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2018-01-26 2:48 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20171222084623.668990192@linuxfoundation.org>
2017-12-22 8:45 ` [PATCH 4.14 023/159] mm/sparsemem: Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y Greg Kroah-Hartman
2017-12-22 14:18 ` Dan Rue
2017-12-22 14:52 ` Naresh Kamboju
2017-12-22 15:12 ` Greg Kroah-Hartman
2017-12-22 15:03 ` Greg Kroah-Hartman
2018-01-07 5:14 ` Mike Galbraith
2018-01-07 9:11 ` Greg Kroah-Hartman
2018-01-07 9:21 ` Mike Galbraith
2018-01-07 10:18 ` Michal Hocko
2018-01-07 10:42 ` Greg Kroah-Hartman
2018-01-07 12:44 ` Mike Galbraith
2018-01-07 13:23 ` Michal Hocko
2018-01-08 7:53 ` Greg Kroah-Hartman
2018-01-08 8:15 ` Mike Galbraith
2018-01-08 8:33 ` Greg Kroah-Hartman
2018-01-08 9:45 ` Mike Galbraith
2018-01-08 8:47 ` Michal Hocko
2018-01-08 9:10 ` Greg Kroah-Hartman
2018-01-08 9:27 ` Greg Kroah-Hartman
2018-01-08 16:04 ` Ingo Molnar
2018-01-08 17:46 ` Kirill A. Shutemov
2018-01-09 0:13 ` Kirill A. Shutemov
2018-01-09 1:09 ` Dave Young
2018-01-09 5:41 ` Baoquan He
2018-01-09 7:24 ` Dave Young
2018-01-09 9:05 ` Kirill A. Shutemov
2018-01-10 3:08 ` Dave Young
2018-01-10 11:16 ` Kirill A. Shutemov
2018-01-11 1:06 ` Baoquan He
2018-01-12 0:55 ` Dave Young
2018-01-15 5:57 ` Omar Sandoval
2018-01-16 8:36 ` Atsushi Kumagai
2018-01-09 3:44 ` Mike Galbraith
2018-02-07 9:25 ` Dou Liyang
2018-02-07 10:41 ` Kirill A. Shutemov
2018-02-07 10:45 ` Mike Galbraith
2018-02-07 12:00 ` Dou Liyang
2018-02-07 12:08 ` Baoquan He
2018-02-07 12:17 ` Dou Liyang
2018-02-07 12:27 ` Baoquan He
2018-02-07 12:34 ` Dou Liyang
2018-02-07 12:45 ` Baoquan He
2018-02-08 1:14 ` Dou Liyang
2018-02-08 1:23 ` Baoquan He
2018-02-08 1:44 ` Dou Liyang
2018-02-07 11:28 ` Baoquan He
2018-01-17 5:24 ` Baoquan He
2018-01-25 15:50 ` Kirill A. Shutemov
2018-01-26 2:48 ` Baoquan He [this message]
2017-12-22 8:45 ` [PATCH 4.14 024/159] x86/kasan: Use the same shadow offset for 4- and 5-level paging Greg Kroah-Hartman
2017-12-22 8:45 ` [PATCH 4.14 025/159] x86/xen: Provide pre-built page tables only for CONFIG_XEN_PV=y and CONFIG_XEN_PVH=y Greg Kroah-Hartman
2017-12-22 8:45 ` [PATCH 4.14 026/159] x86/xen: Drop 5-level paging support code from the XEN_PV code Greg Kroah-Hartman
2017-12-22 8:45 ` [PATCH 4.14 033/159] x86/boot: Relocate definition of the initial state of CR0 Greg Kroah-Hartman
2017-12-22 8:46 ` [PATCH 4.14 097/159] x86/paravirt: Dont patch flush_tlb_single Greg Kroah-Hartman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180126024841.GA1759@localhost.localdomain \
--to=bhe@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=bp@suse.de \
--cc=dyoung@redhat.com \
--cc=efault@gmx.de \
--cc=gorcunov@openvz.org \
--cc=gregkh@linuxfoundation.org \
--cc=kexec@lists.infradead.org \
--cc=kirill.shutemov@linux.intel.com \
--cc=kirill@shutemov.name \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=luto@amacapital.net \
--cc=mingo@kernel.org \
--cc=peterz@infradead.org \
--cc=stable@vger.kernel.org \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
--cc=vgoyal@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).