From: Sascha Hauer <s.hauer@pengutronix.de>
To: Oleksij Rempel <linux@rempel-privat.de>
Cc: barebox@lists.infradead.org, Peter Mamonov <pmamonov@gmail.com>
Subject: Re: [PATCH v1 05/10] MIPS: add kexec ELF loading support
Date: Thu, 17 May 2018 11:56:03 +0200 [thread overview]
Message-ID: <20180517095603.rmr3gdh2kgjkqkgz@pengutronix.de> (raw)
In-Reply-To: <20180516164233.27581-6-linux@rempel-privat.de>
On Wed, May 16, 2018 at 06:42:28PM +0200, Oleksij Rempel wrote:
> From: Antony Pavlov <antonynpavlov@gmail.com>
>
> Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
> Signed-off-by: Peter Mamonov <pmamonov@gmail.com>
> ---
> arch/mips/include/asm/elf.h | 8 +-
> arch/mips/lib/Makefile | 4 +
> arch/mips/lib/kexec-mach-generic.c | 21 +++
> arch/mips/lib/kexec-mips.c | 307 +++++++++++++++++++++++++++++++++++++
> arch/mips/lib/machine_kexec.h | 21 +++
> arch/mips/lib/relocate_kernel.S | 108 +++++++++++++
> 6 files changed, 468 insertions(+), 1 deletion(-)
> create mode 100644 arch/mips/lib/kexec-mach-generic.c
> create mode 100644 arch/mips/lib/kexec-mips.c
> create mode 100644 arch/mips/lib/machine_kexec.h
> create mode 100644 arch/mips/lib/relocate_kernel.S
>
> +int kexec_load(struct image_data *data, void *entry,
> + unsigned long nr_segments,
> + struct kexec_segment *segments)
> +{
> + int i;
> + struct resource *elf;
> + resource_size_t start;
> + LIST_HEAD(elf_segments);
> +
> + for (i = 0; i < nr_segments; i++) {
> + resource_size_t mem = (resource_size_t)segments[i].mem;
> +
> + elf = create_resource("elf segment",
> + mem, mem + segments[i].memsz - 1);
> +
> + list_add_used_region(&elf->sibling, &elf_segments);
> + }
> +
> + if (check_room_for_elf(&elf_segments)) {
> + pr_err("ELF can't be loaded!\n");
> + return -ENOSPC;
> + }
> +
> + start = dcheck_res(&elf_segments);
> +
> + /* relocate_new_kernel() copy by register (4 or 8 bytes)
> + so start address must be aligned to 4/8 */
> + start = (start + 15) & 0xfffffff0;
> +
> + for (i = 0; i < nr_segments; i++) {
> + segments[i].mem = (void *)(phys_to_virt((unsigned long)segments[i].mem));
> + memcpy(phys_to_virt(start), segments[i].buf, segments[i].bufsz);
> + request_sdram_region("kexec relocatable segment",
> + (unsigned long)phys_to_virt(start),
> + (unsigned long)segments[i].bufsz);
The return value of request_sdram_region should be checked and of course
the resource should be used after having checked the return value, not
before. Same for the other calls to request_sdram_region.
Sascha
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next prev parent reply other threads:[~2018-05-17 9:56 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-16 16:42 [PATCH v1 00/10] provide ELF/KEXEC support for MIPS ath79 and malta Oleksij Rempel
2018-05-16 16:42 ` [PATCH v1 01/10] resource: add create_resource() helper function Oleksij Rempel
2018-05-16 16:42 ` [PATCH v1 02/10] port resource_overlaps() from kernel Oleksij Rempel
2018-05-16 16:42 ` [PATCH v1 03/10] filetype: add ELF type Oleksij Rempel
2018-05-16 16:42 ` [PATCH v1 04/10] bootm: add kexec ELF support Oleksij Rempel
2018-05-16 21:34 ` Peter Mamonov
2018-05-17 4:52 ` Oleksij Rempel
2018-05-17 7:01 ` Sascha Hauer
2018-05-17 9:51 ` Peter Mamonov
2018-05-16 16:42 ` [PATCH v1 05/10] MIPS: add kexec ELF loading support Oleksij Rempel
2018-05-17 9:56 ` Sascha Hauer [this message]
2018-05-17 10:07 ` Oleksij Rempel
2018-05-18 5:46 ` Sascha Hauer
2018-05-16 16:42 ` [PATCH v1 06/10] MIPS: ath79: enable kexec Oleksij Rempel
2018-05-16 16:42 ` [PATCH v1 07/10] MIPS: malta: " Oleksij Rempel
2018-05-16 16:42 ` [PATCH v1 08/10] MIPS: configs: add KEXEC=y to atheros devices Oleksij Rempel
2018-05-16 16:42 ` [PATCH v1 09/10] MIPS: configs: dptechnics-dpt-module: enable watchdog poller Oleksij Rempel
2018-05-16 16:42 ` [PATCH v1 10/10] MIPS: malta: update malta qemu defconfig Oleksij Rempel
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