From: takahiro.akashi@linaro.org (AKASHI Takahiro)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v24 5/9] arm64: kdump: add kdump support
Date: Mon, 22 Aug 2016 10:29:20 +0900 [thread overview]
Message-ID: <20160822012919.GI20080@linaro.org> (raw)
In-Reply-To: <20160819112217.GB22221@localhost.localdomain>
On Fri, Aug 19, 2016 at 04:52:17PM +0530, Pratyush Anand wrote:
> On 19/08/2016:10:26:52 AM, AKASHI Takahiro wrote:
> > >From 740563e4a437f0d6ecf6e421c91433f9b8f19041 Mon Sep 17 00:00:00 2001
> > From: AKASHI Takahiro <takahiro.akashi@linaro.org>
> > Date: Fri, 19 Aug 2016 09:57:52 +0900
> > Subject: [PATCH] arm64: mark reserved memblock regions explicitly
> >
> > ---
> > arch/arm64/kernel/setup.c | 9 +++++++--
> > 1 file changed, 7 insertions(+), 2 deletions(-)
> >
> > diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
> > index 38eda13..38589b5 100644
> > --- a/arch/arm64/kernel/setup.c
> > +++ b/arch/arm64/kernel/setup.c
> > @@ -205,10 +205,15 @@ static void __init request_standard_resources(void)
> >
> > for_each_memblock(memory, region) {
> > res = alloc_bootmem_low(sizeof(*res));
> > - res->name = "System RAM";
> > + if (memblock_is_nomap(region)) {
> > + res->name = "reserved";
> > + res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
> > + } else {
> > + res->name = "System RAM";
> > + res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
> > + }
> > res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region));
> > res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1;
> > - res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
> >
> > request_resource(&iomem_resource, res);
>
>
> It will help kexec-tools to prevent copying of any unnecessary data. I
> think, then you also need to change phys_offset calculation in kexec-tools. That
> should be start of either of first "reserved" or "System RAM" block.
Good point, but I'm not sure this is always true.
Is there any system whose ACPI memory is *not* part of DRAM
(so not part of linear mapping)?
Thanks,
-Takahiro AKASHI
> ~Pratyush
next prev parent reply other threads:[~2016-08-22 1:29 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-09 1:52 [PATCH v24 0/9] arm64: add kdump support AKASHI Takahiro
2016-08-09 1:52 ` [PATCH v24 1/9] arm64: kdump: reserve memory for crash dump kernel AKASHI Takahiro
2016-08-09 1:55 ` [PATCH v24 2/9] memblock: add memblock_cap_memory_range() AKASHI Takahiro
2016-08-10 16:26 ` James Morse
2016-08-09 1:56 ` [PATCH v24 3/9] arm64: limit memory regions based on DT property, usable-memory-range AKASHI Takahiro
2016-08-09 1:56 ` [PATCH v24 4/9] arm64: kdump: implement machine_crash_shutdown() AKASHI Takahiro
2016-08-09 1:56 ` [PATCH v24 5/9] arm64: kdump: add kdump support AKASHI Takahiro
2016-08-10 16:38 ` James Morse
2016-08-10 18:18 ` Pratyush Anand
2016-08-11 10:03 ` Pratyush Anand
2016-08-16 10:13 ` James Morse
2016-08-17 15:33 ` [PATCH] fixup! " James Morse
2016-08-18 7:32 ` AKASHI Takahiro
2016-08-19 8:00 ` Pratyush Anand
2016-08-19 13:34 ` James Morse
2016-08-19 15:19 ` Pratyush Anand
2016-08-18 7:15 ` [PATCH v24 5/9] " AKASHI Takahiro
2016-08-18 7:19 ` Dave Young
2016-08-19 1:26 ` AKASHI Takahiro
2016-08-19 11:22 ` Pratyush Anand
2016-08-22 1:29 ` AKASHI Takahiro [this message]
2016-08-22 7:07 ` Pratyush Anand
2016-08-22 13:47 ` James Morse
2016-08-23 0:38 ` AKASHI Takahiro
2016-08-23 11:23 ` Pratyush Anand
2016-08-24 8:04 ` Dave Young
2016-08-24 10:25 ` James Morse
2016-08-25 1:04 ` Dave Young
2016-08-19 13:28 ` James Morse
2016-08-22 1:23 ` AKASHI Takahiro
2016-08-24 14:44 ` Ard Biesheuvel
2016-08-26 6:22 ` AKASHI Takahiro
2016-08-09 1:56 ` [PATCH v24 6/9] arm64: kdump: add VMCOREINFO's for user-space coredump tools AKASHI Takahiro
2016-08-09 1:56 ` [PATCH v24 7/9] arm64: kdump: enable kdump in the arm64 defconfig AKASHI Takahiro
2016-08-09 1:56 ` [PATCH v24 8/9] arm64: kdump: update a kernel doc AKASHI Takahiro
2016-08-09 1:57 ` [PATCH v24 9/9] Documentation: dt: chosen properties for arm64 kdump AKASHI Takahiro
2016-08-19 13:26 ` Rob Herring
2016-08-22 4:28 ` AKASHI Takahiro
2016-08-30 16:34 ` Rob Herring
2016-08-30 23:45 ` AKASHI Takahiro
2016-08-31 5:02 ` AKASHI Takahiro
2016-09-02 10:11 ` AKASHI Takahiro
2016-09-27 23:39 ` Mark Rutland
2016-08-09 2:04 ` [PATCH v24 0/9] arm64: add kdump support AKASHI Takahiro
2016-08-31 3:41 ` Manish Jaggi
2016-08-31 5:31 ` AKASHI Takahiro
2016-09-02 12:53 ` Manish Jaggi
2016-09-05 8:15 ` AKASHI Takahiro
2016-09-05 12:42 ` Manish Jaggi
2016-09-06 15:33 ` Marc Zyngier
2016-09-06 16:15 ` Manish Jaggi
2016-09-06 16:42 ` Marc Zyngier
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