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2017-03-02crashdump/ppc64: Add get_crash_kernel_load_range() functionDaniel Kiper
Implement get_crash_kernel_load_range() in support of print crash kernel region size option. Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Eric DeVolder <eric.devolder@oracle.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2017-03-02crashdump/ppc: Add get_crash_kernel_load_range() functionDaniel Kiper
Implement get_crash_kernel_load_range() in support of print crash kernel region size option. Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Eric DeVolder <eric.devolder@oracle.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2017-03-02crashdump/mips: Add get_crash_kernel_load_range() functionDaniel Kiper
Implement get_crash_kernel_load_range() in support of print crash kernel region size option. Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Eric DeVolder <eric.devolder@oracle.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2017-03-02crashdump/m68k: Add get_crash_kernel_load_range() functionDaniel Kiper
Provide stub get_crash_kernel_load_range() in support of print crash kernel region size option. Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Eric DeVolder <eric.devolder@oracle.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2017-03-02crashdump/ia64: Add get_crash_kernel_load_range() functionDaniel Kiper
Implement get_crash_kernel_load_range() in support of print crash kernel region size option. Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Eric DeVolder <eric.devolder@oracle.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2017-03-02crashdump/cris: Add get_crash_kernel_load_range() functionDaniel Kiper
Provide stub get_crash_kernel_load_range() in support of print crash kernel region size option. Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Eric DeVolder <eric.devolder@oracle.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2017-03-02crashdump/arm64: Add get_crash_kernel_load_range() functionEric DeVolder
Provide stub get_crash_kernel_load_range() in support of print crash kernel region size option. Signed-off-by: Eric DeVolder <eric.devolder@oracle.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2017-03-02crashdump/arm: Add get_crash_kernel_load_range() functionDaniel Kiper
Implement get_crash_kernel_load_range() in support of print crash kernel region size option. Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Eric DeVolder <eric.devolder@oracle.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2017-03-02kexec: Add option to get crash kernel region sizeDaniel Kiper
Crash kernel region size is available via sysfs on Linux running on bare metal. However, this does not work when Linux runs as Xen dom0. In this case Xen crash kernel region size should be established using __HYPERVISOR_kexec_op hypercall (Linux kernel kexec functionality does not make a lot of sense in Xen dom0). Sadly hypercalls are not easily accessible using shell scripts or something like that. Potentially we can check "xl dmesg" output for crashkernel option but this is not nice. So, let's add this functionality, for Linux running on bare metal and as Xen dom0, to kexec-tools. This way kdump scripts may establish crash kernel region size in one way regardless of platform. All burden of platform detection lies on kexec-tools. Figure (and unit) displayed by this new kexec-tools functionality is the same as one taken from /sys/kernel/kexec_crash_size. Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Eric DeVolder <eric.devolder@oracle.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2017-01-31kexec: Remove redundant space from help messageDaniel Kiper
Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Eric DeVolder <eric.devolder@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2017-01-26kexec: implemented XEN KEXEC STATUS to determine if an image is loadedEric DeVolder
Instead of the scripts having to poke at various fields we can provide that functionality via the -S parameter. kexec_loaded/kexec_crash_loaded exposes Linux kernel kexec/crash state. It does not say anything about Xen kexec/crash state. So, we need a special approach to get the latter. Though for compatibility we provide similar functionality in kexec-tools for the former. This change enables the --status or -S option to work either with or without Xen. Returns 0 if the payload is loaded. Can be used in combination with -l or -p to get the state of the proper kexec image. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Eric DeVolder <eric.devolder@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2017-01-24alpha: add missing __NR_kexec_load definitionSimon Horman
Signed-off-by: Simon Horman <horms@verge.net.au>
2017-01-24kexec: Increase the upper limit for RAM segmentsSameer Goel
On a newer UEFI based Qualcomm target the number of system ram regions retrieved from /proc/iomem are ~40. So increasing the current hardcoded values to 64 from 16. Signed-off-by: Sameer Goel <sgoel@codeaurora.org> Signed-off-by: Simon Horman <horms@verge.net.au>
2017-01-24ppc64: Reduce number of ELF LOAD segmentsPetr Tesarik
The number of program header table entries (e_phnum) is an Elf64_Half, which is a 16-bit entity, i.e. the limit is 65534 entries (one entry is reserved for NOTE). This is a hard limit, defined by the ELF standard. It is possible that more LMBs (Logical Memory Blocks) are needed to represent all RAM on some machines, and this field overflows, causing an incomplete /proc/vmcore file. This has actually happened on a machine with 31TB of RAM and an LMB size of 256MB. However, since there is usually no memory hole between adjacent LMBs, the map can be "compressed", combining multiple adjacent into a single LOAD segment. Signed-off-by: Petr Tesarik <ptesarik@suse.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-12-12arm: do not build iomem.o target with no soruceSimon Horman
Header files should be added to the distribution but not used to derive targets for compilation. In this an attempt was made to build iomem.o, but iomem.c does not exist so this fails. Fixes: 1574ff1aae4f ("arm: include phys_to_virt.h and iomem.h in distribution") Signed-off-by: Simon Horman <horms@verge.net.au> Reviewed-by: Pratyush Anand <panand@redhat.com>
2016-12-09ia64: ehdr is not UNUSED in machine_apply_elf_relSimon Horman
The ehdr parameter of machine_apply_elf_rel() is used. This resolves a build regression. Fixes: 4a2ae3a39c64 ("Pass struct mem_sym into machine_apply_elf_rel()") Signed-off-by: Simon Horman <horms@verge.net.au> Reviewed-by: Pratyush Anand <panand@redhat.com>
2016-12-09arm64: Fix initrd requierementsMatthias Brugger
The initrd doesn't need to be aligend to 1 GB, which breaks kexec for system with RAM <= 1 GB. Instead the memory size between the kernel start rounded down to 1 GB and the end of the initrd rounded up to 1 GB can't be bigger then 32 GB. Signed-off-by: Matthias Brugger <mbrugger@suse.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-12-09mips: add option to load initrd from a specified fileMarcin Nowakowski
Use kexec's existing infrastrucutre for supporting initrd loading. The initrd image is loaded into a buffer after the dtb and its details passed through the device tree, so it's supported on newer platforms that make use of the device tree passed from kexec. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Signed-off-by: Simon Horman <horms@verge.net.au>
2016-12-09mips: add dtb loading supportMarcin Nowakowski
Kexec for MIPS currently does not support loading devicetrees, unless they are embedded in the kernel elf file. Add an option to either pass a new dtb file or - if not specified - to be generated from existing device tree on the device. As new generic platforms require a dtb to be passed separately this is required for such platforms and will be ignored by the kernel otherwise. Generic kexec infrastructure for dtb support is used. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Signed-off-by: Simon Horman <horms@verge.net.au>
2016-12-09mips: crashdump: add little-endian supportMarcin Nowakowski
Elf header for crashdump has until now been hardcoded as big-endian. Change that to use the native endianness for the compile target so that the crashdumps are generated properly for each CPU type. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-12-09mips: move arch option parsing from elf loader to common arch codeMarcin Nowakowski
At the moment only commandline handling is implemented and there is nothing elf-specific about it, so all of the commandline parsing logic can be moved to common arch code. getopt() options are moved to KEXEC_ARCH_OPTIONS macro (as many platforms currently do) to avoid unnecessary duplication. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-12-09mips: use arch_options for both 32 and 64 bit variantsMarcin Nowakowski
At the moment arch_options structure is defined for 64-bit only and is used exclusively in ifdef'ed code. Remove the ifdefs around the uses of the structure and define it for all code variants as it will be used for passing more arch options in the followup commits. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-12-09mips: remove incorrect arch_usage stringMarcin Nowakowski
arch_usage shows '--elf32-core-headers' as an option, but this is not implemented. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-12-08kexec-tools/x86: get_kernel_vaddr_and_size off-by-one fixDave Young
I got below error while tesing kexec -p: "Can't find kernel text map area from kcore" The case is the pt_load start addr was same as stext_sym. The checking code should really be saddr <= stext_sym so that the right pt_load area includes stext_sym can be matched. This was not reported by people previously because it will fail over to use hardcode X86_64__START_KERNEL_map to match the pt_load areas again in later code and it sometimes succeeds because of kernel address randomization. With this change according to my test stext_sym checking can garantee falling into right pt_load area if we get correct stext_sym. Signed-off-by: Dave Young <dyoung@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-11-07arm64: Add support of R_AARCH64_PREL32 relocation in purgatoryPratyush Anand
gcc version in fedora koji is 6.2.1-2.fc25. kexec-tools compiled with this gcc produced another relocation error: machine_apply_elf_rel: ERROR Unknown type: 261 This patch fixes the above error. Signed-off-by: Pratyush Anand <panand@redhat.com> Reviewed-by: Geoff Levand <geoff@infradead.org> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-11-07arm64: Add support for additional relocations in the kexec purgatory codeCatalin Marinas
When compiling the kexec-tools with gcc6, the following additional reolcations are generated in the purgatory.ro file: R_AARCH64_ADR_PREL_PG_HI21 R_AARCH64_ADD_ABS_LO12_NC R_AARCH64_LDST64_ABS_LO12_NC This patch modifies the arm64 machine_apply_elf_rel() function to handle these relocations. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Geoff Levand <geoff@infradead.org> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-10-13arm64: Add missing kexec dist filesGeoff Levand
Signed-off-by: Geoff Levand <geoff@infradead.org> Reviewed-by: Matthias Brugger <mbrugger@suse.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-10-13arm64: Cleanup kexec MakefileGeoff Levand
Put files in alphabetical order, reformat whitspace. Signed-off-by: Geoff Levand <geoff@infradead.org> Reviewed-by: Matthias Brugger <mbrugger@suse.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-10-07kexec/fs2dt: Check for NULL pointer in dt_copy_old_root_param()Madhavan Srinivasan
In dt_copy_old_root_param(), FILE * returned from fopen is not checked for NULL pointer before passinig to fclose(). This could trigger a segfault. Patch to fix the same. Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-10-07multiboot: Use the "reserved" type for non-ram zonesSylvain Munaut
Seems that Xen actually checks for some zones to be 'reserved' and complains if they are not. This also matches what the bios uses at boot. Signed-off-by: Sylvain Munaut <s.munaut@whatever-company.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-10-07multiboot: Fix length computation for the memory zonesSylvain Munaut
Signed-off-by: Sylvain Munaut <s.munaut@whatever-company.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-10-07kexec elf: Sanity check on the note header before accessing itSylvain Munaut
The name[hdr.n_namesz -1] check below can segfault if the header is garbage. So we check the computed header side fits within the expected area before going further. Signed-off-by: Sylvain Munaut <s.munaut@whatever-company.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-09-29arm: include phys_to_virt.h and iomem.h in distributionDave Young
These files are required to build kexec-tools on arm. Signed-off-by: Dave Young <dyoung@redhat.com> [simon: added changelog] Signed-off-by: Simon Horman <horms@verge.net.au>
2016-09-29kexec: socket not released when error situation occur.YoungHyun Yoo
Fix resourceleek in ifdown function when error occur. Signed-off-by: YoungHyun Yoo <yooyoo.yoo@samsung.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-09-29kexec: fix mem_regions_sort()Pratyush Anand
ranges->ranges is "struct memory_range *", however each element which need to be sorted is of type "struct memory_range". So, correct "size" argument of qsort() as sizeof(*ranges->ranges). Signed-off-by: Pratyush Anand <panand@redhat.com> Acked-by: Russell King <rmk@armlinux.org.uk> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-09-29kexec/arch/i386: Add support for KASLR memory randomizationThomas Garnier
Multiple changes were made on KASLR (right now in linux-next). One of them is randomizing the virtual address of the physical mapping, vmalloc and vmemmap memory sections. It breaks kdump ability to read physical memory. This change identifies if KASLR memories randomization is used by checking if the page_offset_base variable exists. It search for the correct PAGE_OFFSET value by looking at the loaded memory section and find the lowest aligned on PUD (the randomization level). Related commits on linux-next: - 0483e1fa6e09d4948272680f691dccb1edb9677f: Base for randomization - 021182e52fe01c1f7b126f97fd6ba048dc4234fd: Enable for PAGE_OFFSET Signed-off-by: Thomas Garnier <thgarnie@google.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-09-29arm64: Add support for binary image filesPratyush Anand
Signed-off-by: Pratyush Anand <panand@redhat.com> [Reworked and cleaned up] Signed-off-by: Geoff Levand <geoff@infradead.org> Tested-By: Pratyush Anand <panand@redhat.com> Tested-By: Matthias Brugger <mbrugger@suse.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-09-29arm64: Add arm64 kexec supportGeoff Levand
Add kexec reboot support for ARM64 platforms. Signed-off-by: Geoff Levand <geoff@infradead.org> Tested-By: Pratyush Anand <panand@redhat.com> Tested-By: Matthias Brugger <mbrugger@suse.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-09-29kexec: Add common device tree routinesGeoff Levand
Common device tree routines that can be shared between all arches that have device tree support. Signed-off-by: Geoff Levand <geoff@infradead.org> Tested-By: Pratyush Anand <panand@redhat.com> Tested-By: Matthias Brugger <mbrugger@suse.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-07-15arm: use zImage size from headerRussell King
We do not support zImage with an appended DTB as we need to supply our own DTB to the kernel, and an appended DTB will override any that we try to supply. To ensure that we do not load an appended DTB, clamp the kernel size to the size specified in the zImage header. Signed-off-by: Russell King <rmk@armlinux.org.uk> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-07-15arm: plug a zImage corner caseRussell King
If a zImage is built with ARM_APPENDED_DTB enabled, the zImage will look at the word following the zImage and check whether it contains the DTB magic number. Generally, kexec will clear the destination pages before copying the zImage, but there is a corner case where the zImage is a multiple of the page size, where the following page will not be touched. Should the first word in this page contain the DTB magic number, the data following will be interpreted as a DTB image. In order to make this bullet-proof, we must always initialise the word following the zImage. Arrange this by specifying the zImage memory size one word bigger than the buffer size. Signed-off-by: Russell King <rmk@armlinux.org.uk> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-06-23arm: fix kernel image sizeRussell King
If we want to assume that the compressed image will expand by a maximum of 4x, we actually need to reserve 5x the space, since we need to keep a copy of the compessed image around while decompressing. Signed-off-by: Russell King <rmk@armlinux.org.uk> Reviewed-by: Pratyush Anand <panand@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-06-23arm: take account of TEXT_OFFSET for subsequent imagesRussell King
The ARM kexec code was not taking account of the 32k text offset when applying the size(s) of the kernel image. We need to take account of this so when we decide to place the initrd at 4x the compressed image length, it is appropriately placed. Signed-off-by: Russell King <rmk@armlinux.org.uk> Reviewed-by: Pratyush Anand <panand@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-06-23Remove "max" parameter commentRussell King
Remove the "max" parameter in the documentation for mem_regions_add() Signed-off-by: Russell King <rmk@armlinux.org.uk> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-06-08arm: report which ELF core format we will useRussell King
Report which ELF core format will be used to create the template ELF core dump in the debug information. Reviewed-by: Pratyush Anand <panand@redhat.com> Signed-off-by: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-06-08arm: clean up phys/page offset debugRussell King
Clean up the physical and page offset debug prints. Reviewed-by: Pratyush Anand <panand@redhat.com> Signed-off-by: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-06-08arm: fix type of phys_offsetRussell King
Some LPAE systems may have phys_offset above the 4GB mark. Hence, we need phys_offset to be a 64-bit integer. Reviewed-by: Pratyush Anand <panand@redhat.com> Signed-off-by: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-06-08arm: add debug of reserved and coredump memory rangesRussell King
Add debug of the reserved and coredump memory ranges for validation. Reviewed-by: Pratyush Anand <panand@redhat.com> Signed-off-by: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-06-08arm: add support for boot-time crash kernel resourceRussell King
Add support for detecting and using the boot-time crash kernel resource, which is needed for systems which have special boot-time memory views, such as Keystone 2. Reviewed-by: Pratyush Anand <panand@redhat.com> Signed-off-by: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Simon Horman <horms@verge.net.au>
2016-06-08arm: add support for multiple reserved regionsRussell King
Add support for reserving multiple memory regions rather than just a single region. Reviewed-by: Pratyush Anand <panand@redhat.com> Signed-off-by: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Simon Horman <horms@verge.net.au>
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