From: "bhe@redhat.com" <bhe@redhat.com>
To: Dave Young <dyoung@redhat.com>
Cc: Junichi Nomura <j-nomura@ce.jp.nec.com>,
Chao Fan <fanc.fnst@cn.fujitsu.com>,
Borislav Petkov <bp@alien8.de>,
"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 for searching RSDP on kexec-ed kernel
Date: Thu, 4 Apr 2019 11:10:30 +0800 [thread overview]
Message-ID: <20190404031030.GU7627@MiWiFi-R3L-srv> (raw)
In-Reply-To: <20190404030037.GT7627@MiWiFi-R3L-srv>
On 04/04/19 at 11:00am, Baoquan He wrote:
> On 04/04/19 at 10:52am, Dave Young wrote:
> > On 04/04/19 at 01:23am, Junichi Nomura wrote:
> > > Hi Dave and Chao,
> > >
> > > On 4/3/19 6:02 PM, Chao Fan wrote:
> > > > On Wed, Apr 03, 2019 at 04:23:06PM +0800, Chao Fan wrote:
> > > >> On Wed, Apr 03, 2019 at 04:09:16PM +0800, Dave Young wrote:
> > > >>> Fix 3. need more debugging, have you or Junichi run tests on more real
> > > >>> hardware, maybe it is easier to reproduce on real hardware, I'm glad to
> > > >>> help to try test patch or provide any help.
> > > >>
> > > >> I am still testing in real hardware.
> > > >
> > > > Hi Dave,
> > > >
> > > > I find a Fujitsu Desktop PC to test it.
> > > > Without this PATCH, it failed to kexec and kdump.
> > > > With this PATCH, it succeed to kexec.
> > > > But failed to kdump. From the log, I think it didn't jump to the second
> > > > kernel, just reboot after panic. I have not figured out what's the
> > > > problem, but it seems not caused by this PATCH.
> > > > So I still think this PATCH works for the Fujitsu Desktop PC.
> > > >
> > > > As for your issue, I think there may be some problems related to specified
> > > > hardware. Are you using a Lenovo laptop?
> > > >
> > > > And I am not sure how Nomura tested it.
> > >
> > > I've tested 3 different models of EFI-booted baremetal servers with both
> > > normal kexec and panic kexec. So far as I've tried Linus's v5.1-rc3,
> > > the problem always reproduced without the patch and disappears with the patch.
> >
> > Hmm, both of my two laptops (Thinkpad T480s and T420) failed to boot with kexec.
> >
> > I will see if I can find something, but it may need more time because
> > early console does not work especially after kexec.
>
> Dave, can you try below patch to print debugging message and hang kernel
> to check the outputting? The hang is necessary, otherwise later printk
> printking will overwrite it.
>
> diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
> index c0d6c560df69..68119547c4aa 100644
> --- a/arch/x86/boot/compressed/misc.c
> +++ b/arch/x86/boot/compressed/misc.c
> @@ -351,9 +351,6 @@ asmlinkage __visible void *extract_kernel(void *rmode, memptr heap,
> /* Clear flags intended for solely in-kernel use. */
> boot_params->hdr.loadflags &= ~KASLR_FLAG;
>
> - /* Save RSDP address for later use. */
> - boot_params->acpi_rsdp_addr = get_rsdp_addr();
> -
> sanitize_boot_params(boot_params);
>
> if (boot_params->screen_info.orig_video_mode == 7) {
> @@ -370,6 +367,10 @@ asmlinkage __visible void *extract_kernel(void *rmode, memptr heap,
> console_init();
> debug_putstr("early console in extract_kernel\n");
>
+ /* Save RSDP address for later use. */
+ boot_params->acpi_rsdp_addr = get_rsdp_addr();
+
+ error("Hang kernel for kexec debugging");
Sorry, here I means calling error() to hang kernel after calling
get_rsdp_addr().
> free_mem_ptr = heap; /* Heap */
> free_mem_end_ptr = heap + BOOT_HEAP_SIZE;
>
next prev parent reply other threads:[~2019-04-04 3:10 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-22 11:03 [PATCH] x86/boot: Use EFI setup data if provided 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 ` [PATCH v2] x86/boot: Use EFI setup data if provided Dave Young
2019-03-25 10:36 ` 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 [this message]
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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