From: panand@redhat.com (Pratyush Anand)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 10/12] kexec: arrange for paddr_vmcoreinfo_note() to return phys_addr_t
Date: Tue, 3 May 2016 11:23:29 +0530 [thread overview]
Message-ID: <20160503055329.GA13045@dhcppc6.redhat.com> (raw)
In-Reply-To: <20160503042441.GA2518@x1.redhat.com>
Hi Baoquan,
On 03/05/2016:12:24:41 PM, Baoquan He wrote:
> Hi Pratyush,
>
> Could you please help tell why arm PAE kernel can be put above 4G?
PAE system can have physical addresses above 4G. So, if a CPU is supporting the
LPAE page table format then we should be able to access physical addresses
beyond 4G.
> Since the change is related to common code, I am curious about how
> it's so different with other ARCHs.
paddr_vmcoreinfo_note() returns a physical address, so returning phys_addr_t
seems most appropriate. So, kernel variable may land into above 4G locations,
even with the platform in other architecture (with PAE support), if start of RAM
is located very high,
So, in my opinion it would be safer to have these changes for other ARCHs as
well.
~Pratyush
next prev parent reply other threads:[~2016-05-03 5:53 UTC|newest]
Thread overview: 121+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-28 9:26 [PATCH 00/12] Fixing TI Keystone2 kexec Russell King - ARM Linux
2016-04-28 9:27 ` [PATCH 01/12] ARM: kexec: fix crashkernel= handling Russell King
2016-04-29 14:17 ` Pratyush Anand
2016-04-28 9:27 ` [PATCH 02/12] ARM: provide improved virt_to_idmap() functionality Russell King
2016-04-28 9:27 ` [PATCH 03/12] ARM: kexec: remove 512MB restriction on kexec crashdump Russell King
2016-04-29 14:19 ` Pratyush Anand
2016-04-29 18:10 ` Russell King - ARM Linux
2016-04-30 3:36 ` Pratyush Anand
2016-04-30 8:25 ` Russell King - ARM Linux
2016-04-28 9:28 ` [PATCH 04/12] ARM: provide arm_has_idmap_alias() helper Russell King
2016-04-29 14:21 ` Pratyush Anand
2016-04-28 9:28 ` [PATCH 05/12] ARM: kdump: advertise boot aliased crash kernel resource Russell King
2016-04-28 9:28 ` [PATCH 06/12] ARM: kexec: advertise location of bootable RAM Russell King
2016-04-29 14:56 ` Pratyush Anand
2016-04-29 18:00 ` Russell King - ARM Linux
2016-04-30 3:27 ` Pratyush Anand
2016-04-30 8:20 ` Russell King - ARM Linux
2016-05-02 7:34 ` Pratyush Anand
2016-05-02 10:10 ` Russell King - ARM Linux
2016-05-02 10:48 ` Pratyush Anand
2016-05-03 10:21 ` [PATCH kexec-tools 01/32] kdump: mmap() and munmap() only work on page-aligned quantites Russell King
2016-05-25 6:16 ` Pratyush Anand
2016-05-26 8:35 ` Russell King - ARM Linux
2016-05-03 10:21 ` [PATCH kexec-tools 02/32] kdump: fix multiple program header entries Russell King
2016-05-25 6:16 ` Pratyush Anand
2016-05-03 10:21 ` [PATCH kexec-tools 03/32] kdump: actually write out the memory Russell King
2016-05-25 6:16 ` Pratyush Anand
2016-05-03 10:21 ` [PATCH kexec-tools 04/32] kdump: fix kdump mapping Russell King
2016-05-25 6:17 ` Pratyush Anand
2016-05-26 14:33 ` Russell King - ARM Linux
2016-05-03 10:21 ` [PATCH kexec-tools 05/32] arm: fix kdump to work on LPAE systems Russell King
2016-05-28 11:28 ` Baoquan He
2016-05-03 10:21 ` [PATCH kexec-tools 06/32] kdump: print mmap() offset in hex Russell King
2016-05-25 6:21 ` Pratyush Anand
2016-05-03 10:21 ` [PATCH kexec-tools 07/32] kexec: fix warnings caused by selecting 64-bit file IO on 32-bit platforms Russell King
2016-05-28 11:33 ` Baoquan He
2016-05-28 13:53 ` Russell King - ARM Linux
2016-05-29 13:29 ` Baoquan He
2016-05-03 10:21 ` [PATCH kexec-tools 08/32] kexec: add max_size to memory_ranges Russell King
2016-05-27 11:43 ` Pratyush Anand
2016-05-03 10:21 ` [PATCH kexec-tools 09/32] kexec: phys_to_virt() must take unsigned long long Russell King
2016-05-25 6:31 ` Pratyush Anand
2016-05-03 10:21 ` [PATCH kexec-tools 10/32] kexec: add generic helper to add to memory_regions Russell King
2016-05-25 8:00 ` Pratyush Anand
2016-05-03 10:22 ` [PATCH kexec-tools 11/32] kexec: add mem_regions sorting implementation Russell King
2016-05-25 8:00 ` Pratyush Anand
2016-05-03 10:22 ` [PATCH kexec-tools 12/32] kexec: add helper to exlude a region from a set of memory ranges Russell King
2016-05-25 8:00 ` Pratyush Anand
2016-05-26 8:56 ` Russell King - ARM Linux
2016-05-27 15:07 ` Pratyush Anand
2016-05-27 15:12 ` Russell King - ARM Linux
2016-05-03 10:22 ` [PATCH kexec-tools 13/32] arm: fix pointer signedness warning in kexec-uImage-arm.c Russell King
2016-05-25 8:00 ` Pratyush Anand
2016-05-03 10:22 ` [PATCH kexec-tools 14/32] arm: fix off-by-one on memory end Russell King
2016-05-25 8:01 ` Pratyush Anand
2016-05-03 10:22 ` [PATCH kexec-tools 15/32] arm: fix get_kernel_stext_sym() to close its file Russell King
2016-05-25 8:01 ` Pratyush Anand
2016-05-03 10:22 ` [PATCH kexec-tools 16/32] arm: fix ELF32/ELF64 check Russell King
2016-05-03 10:22 ` [PATCH kexec-tools 17/32] arm: return proper error for missing crash kernel Russell King
2016-05-27 11:27 ` Pratyush Anand
2016-05-03 10:22 ` [PATCH kexec-tools 18/32] arm: report if crash kernel is out of bounds Russell King
2016-05-27 11:27 ` Pratyush Anand
2016-05-27 13:36 ` Russell King - ARM Linux
2016-05-03 10:22 ` [PATCH kexec-tools 19/32] arm: add memory ranges debug Russell King
2016-05-27 11:28 ` Pratyush Anand
2016-05-03 10:22 ` [PATCH kexec-tools 20/32] arm: add maximum number of memory ranges Russell King
2016-05-27 11:29 ` Pratyush Anand
2016-05-03 10:22 ` [PATCH kexec-tools 21/32] arm: parse crash_reserved_mem early Russell King
2016-05-27 11:30 ` Pratyush Anand
2016-05-03 10:22 ` [PATCH kexec-tools 22/32] arm: use generic mem_region sorting implementation Russell King
2016-05-27 11:30 ` Pratyush Anand
2016-05-03 10:23 ` [PATCH kexec-tools 23/32] arm: move crash system RAM parsing earlier Russell King
2016-05-27 11:33 ` Pratyush Anand
2016-05-03 10:23 ` [PATCH kexec-tools 24/32] arm: add support for platforms with boot memory aliases Russell King
2016-05-27 11:34 ` Pratyush Anand
2016-05-03 10:23 ` [PATCH kexec-tools 25/32] arm: crashdump needs boot alias of crash kernel region Russell King
2016-05-27 11:34 ` Pratyush Anand
2016-05-03 10:23 ` [PATCH kexec-tools 26/32] arm: rename crash_reserved_mem to crash_kernel_mem Russell King
2016-05-27 11:36 ` Pratyush Anand
2016-05-03 10:23 ` [PATCH kexec-tools 27/32] arm: add support for multiple reserved regions Russell King
2016-05-27 11:37 ` Pratyush Anand
2016-05-03 10:23 ` [PATCH kexec-tools 28/32] arm: add support for boot-time crash kernel resource Russell King
2016-05-27 11:37 ` Pratyush Anand
2016-05-03 10:23 ` [PATCH kexec-tools 29/32] arm: add debug of reserved and coredump memory ranges Russell King
2016-05-27 11:35 ` Pratyush Anand
2016-05-03 10:23 ` [PATCH kexec-tools 30/32] arm: fix type of phys_offset Russell King
2016-05-27 11:38 ` Pratyush Anand
2016-05-03 10:23 ` [PATCH kexec-tools 31/32] arm: clean up phys/page offset debug Russell King
2016-05-27 11:38 ` Pratyush Anand
2016-05-03 10:23 ` [PATCH kexec-tools 32/32] arm: report which ELF core format we will use Russell King
2016-05-27 11:38 ` Pratyush Anand
2016-05-03 10:29 ` [PATCH 06/12] ARM: kexec: advertise location of bootable RAM Russell King - ARM Linux
2016-04-28 9:28 ` [PATCH 07/12] ARM: keystone: dts: add psci command definition Russell King
2016-04-28 9:28 ` [PATCH 08/12] kexec: don't invoke OOM-killer for control page allocation Russell King
2016-04-29 14:57 ` Pratyush Anand
2016-04-28 9:28 ` [PATCH 09/12] kexec: ensure user memory sizes do not wrap Russell King
2016-04-29 14:57 ` Pratyush Anand
2016-04-28 9:28 ` [PATCH 10/12] kexec: arrange for paddr_vmcoreinfo_note() to return phys_addr_t Russell King
2016-04-29 15:06 ` Pratyush Anand
2016-04-29 15:16 ` Mark Rutland
2016-04-29 15:47 ` Pratyush Anand
2016-05-03 4:24 ` Baoquan He
2016-05-03 5:53 ` Pratyush Anand [this message]
2016-05-03 9:01 ` Baoquan He
2016-05-03 10:12 ` Russell King - ARM Linux
2016-05-03 12:56 ` Baoquan He
2016-04-29 18:06 ` Russell King - ARM Linux
2016-04-30 3:30 ` Pratyush Anand
2016-04-28 9:28 ` [PATCH 11/12] kexec: allow architectures to override boot mapping Russell King
2016-04-29 15:14 ` Pratyush Anand
2016-04-29 18:08 ` Russell King - ARM Linux
2016-05-11 18:56 ` Russell King - ARM Linux
2016-05-12 6:26 ` Baoquan He
2016-05-12 8:22 ` Russell King - ARM Linux
2016-04-28 9:28 ` [PATCH 12/12] ARM: kexec: fix kexec for Keystone 2 Russell King
2016-04-28 23:04 ` [PATCH 00/12] Fixing TI Keystone2 kexec Simon Horman
2016-05-11 8:29 ` Dave Young
2016-05-11 8:52 ` Russell King - ARM Linux
2016-05-11 9:13 ` Dave Young
2016-05-11 9:32 ` Russell King - ARM Linux
2016-05-11 10:31 ` Dave Young
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