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2014-03-28Introduce setup_dtb_prop to make code clearWang Nan
This patch introduces setup_dtb_prop(), which is used for dtb operations. The code is extracted from zImage_arm_load, and this patch makes memory grown computation more accurate. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Dave Young <dyoung@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-03-28Introduce helpers for computing dtb sizeWang Nan
This patch introduce fdt_node_len and fdt_prop_len to help for computing memory requirement when operating dtb. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Dave Young <dyoung@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-03-28x86, kaslr: add alternative way to locate kernel text mapping areaWANG Chao
When kASLR is enabled (CONFIG_RANDOMIZED_BASE=y), kernel text mapping base is randomized. The max base offset of such randomization is configured at compile time through CONFIG_RANDOMIZE_MAX_BASE_OFFSET (by default 1G). Currently kexec-tools is using hard code macro X86_64__START_KERNEL_map (0xffffffff80000000) and X86_64_KERNEL_TEXT_SIZE (512M) to determine kernel text mapping from kcore's PT_LOAD. With kASLR, the mapping is changed as the following: ffffffff80000000 - (ffffffff80000000+CONFIG_RANDOMIZE_BASE_MAX_OFFSET) As Vivek suggested, we can get _stext kernel symbol address from /proc/kallsyms, and search for kcore's PT_LOAD which contains _stext, and we can say that this area represents the kernel mapping area. Let's first use this way to find out kernel text mapping. If failed for whatever reason, fall back to use the old way. Suggested-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: WANG Chao <chaowang@redhat.com> Acked-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-03-28i386: fix erroneous memory descriptor messageTony Jones
On non-EFI systems, efi_info section of boot_params is zero filled resulting in an erroneous message from kexec regarding "efi memory descriptor" version. Caused by commit: e1ffc9e9a0769e1f54185003102e9bec428b84e8 "Passing efi related data via setup_data" 0000700 0000 0000 0000 0000 0000 0000 0000 0000 0000720 0000 0000 0000 0000 0000 0000 0000 0000 0000740 efi memory descriptor version 0 is not supported! Signed-off-by: Tony Jones <tonyj@suse.de> Acked-by: Dave Young <dyoung@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-03-25kexec-tools: handle 64bit efi memmap address correctlyDave Young
In case using crashkernel=xM,high crashkernel memory will be allocated from top to down Thus the usable memory for kdump kernel could be bigger than 4G. The efi memmap value is two 32 bit values efi_memmap and efi_memmap_hi, previously I only passed the efi_memmap so for the high memory address there will be below kernel panic: [ 0.000000] efi: EFI v2.31 by American Megatrends [ 0.000000] efi: ACPI 2.0=0xdb752000 SMBIOS=0xdbab4b98 ACPI=0xdb752000 MPS=0xf4bd0 [ 0.000000] efi: mem00: type=4294967295, attr=0xffffffffffffffff, range=[0xffffffffffffffff-0xffffffffffffefff) (72057594037927935) [ 0.000000] efi: mem01: type=4294967295, attr=0xffffffffffffffff, range=[0xffffffffffffffff-0xffffffffffffefff) (72057594037927935) [ 0.000000] efi: mem02: type=4294967295, attr=0xffffffffffffffff, range=[0xffffffffffffffff-0xffffffffffffefff) (72057594037927935) [ 0.000000] efi: mem03: type=4294967295, attr=0xffffffffffffffff, range=[0xffffffffffffffff-0xffffffffffffefff) (72057594037927935) [ 0.000000] efi: mem04: type=4294967295, attr=0xffffffffffffffff, range=[0xffffffffffffffff-0xffffffffffffefff) (72057594037927935) [ 0.000000] SMBIOS 2.7 present. [snip] [ 0.082451] BUG: unable to handle kernel paging request at ffffa3d0f0000000 [ 0.089467] IP: [<ffffffff810513d1>] native_set_pte+0x1/0x10 [ 0.095157] PGD 0 [ 0.097197] Oops: 0002 [#1] SMP [ 0.100466] Modules linked in: [ 0.103554] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.14.0-rc7 #157 [ 0.110001] Hardware name: Hewlett-Packard HP Z420 Workstation/1589, BIOS J61 v03.15 05/09/2013 [ 0.118697] task: ffffffff818e1460 ti: ffffffff818ce000 task.ti: ffffffff818ce000 [ 0.126181] RIP: 0010:[<ffffffff810513d1>] [<ffffffff810513d1>] native_set_pte+0x1/0x10 [ 0.134296] RSP: 0000:ffffffff818cfc80 EFLAGS: 00010287 [ 0.139609] RAX: 0000000000000000 RBX: ffffa3d0f0000000 RCX: 00003ffffffff000 [ 0.146744] RDX: ffff880000000000 RSI: 0000000000000000 RDI: ffffa3d0f0000000 [ 0.153879] RBP: ffffffff818cfcb8 R08: ffffea0010745d20 R09: 0000000000000000 [ 0.161013] R10: ffff88041f731fc0 R11: 000000000000001e R12: 0000000000200000 [ 0.168148] R13: 0000000000000000 R14: 0000000000400000 R15: ffff880000000008 [ 0.175288] FS: 0000000000000000(0000) GS:ffff88041f200000(0000) knlGS:0000000000000000 [ 0.183377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.189125] CR2: ffffa3d0f0000000 CR3: 000000041e8da000 CR4: 00000000000406b0 [ 0.196264] Stack: [ 0.198283] ffffffff818cfcb8 ffffffff810561d7 ffff880000000008 0000000000400000 [ 0.205746] ffff880000001000 00000000000001ff ffff88041e8de000 ffffffff818cfd00 [ 0.213210] ffffffff8105644e 0000000000200000 0000000040000000 00000000ffffffff [ 0.220676] Call Trace: [ 0.223130] [<ffffffff810561d7>] ? unmap_pte_range+0x77/0x110 [ 0.228966] [<ffffffff8105644e>] unmap_pmd_range+0xde/0x210 [ 0.234630] [<ffffffff81056c6b>] __cpa_process_fault+0x48b/0x5e0 [ 0.240730] [<ffffffff81057276>] __change_page_attr_set_clr+0x4b6/0xb10 [ 0.247437] [<ffffffff810557c7>] ? __ioremap_caller+0x277/0x360 [ 0.253454] [<ffffffff810589f1>] kernel_map_pages_in_pgd+0x71/0xa0 [ 0.259736] [<ffffffff81a53361>] __map_region+0x45/0x63 [ 0.265051] [<ffffffff81a535cc>] efi_map_region_fixed+0xd/0xf [ 0.270886] [<ffffffff81a52f19>] efi_enter_virtual_mode+0x5a/0x3d9 [ 0.277162] [<ffffffff81a77516>] ? acpi_enable_subsystem+0x37/0x90 [ 0.283440] [<ffffffff81a36eb9>] start_kernel+0x386/0x41c [ 0.288931] [<ffffffff81a3693c>] ? repair_env_string+0x5c/0x5c [ 0.294852] [<ffffffff81a36120>] ? early_idt_handlers+0x120/0x120 [ 0.301035] [<ffffffff81a365ee>] x86_64_start_reservations+0x2a/0x2c [ 0.307479] [<ffffffff81a3672e>] x86_64_start_kernel+0x13e/0x14d [ 0.313572] Code: 66 2e 0f 1f 84 00 00 00 00 00 48 8b 46 18 55 48 89 e5 48 89 47 04 5d c3 66 90 55 48 89 e5 0f 01 f8 5d c3 0f 1f 8 [ 0.333545] RIP [<ffffffff810513d1>] native_set_pte+0x1/0x10 [ 0.339312] RSP <ffffffff818cfc80> [ 0.342807] CR2: ffffa3d0f0000000 [ 0.346141] ---[ end trace 86088f739725b8c6 ]--- [ 0.350760] Kernel panic - not syncing: Fatal exception Fix this by passing both efi_memmap and efi_memmap_hi to 2nd kernel. Reported-by: Linn Crosetto <linn@hp.com> Signed-off-by: Dave Young <dyoung@redhat.com> Tested-by: Linn Crosetto <linn@hp.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-03-20kexec: align initrd when no --image-size passedWang Nan
Before this patch, when no --image-size passed, initrd_base is caculated using base + len * 4, which is unaligned, and unable to pass check in add_segment_phys_virt(): if (base & (pagesize -1)) { die("Base address: 0x%lx is not page aligned\n", base); } This patch also uses getpagesize() instead of hard encoded 4096. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Dave Young <dyoung@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-03-20cleanup: add dbgprint_mem_range functionWANG Chao
dbgprint_mem_range is used for printing the given memory range under debugging mode. Signed-off-by: WANG Chao <chaowang@redhat.com> Tested-by: Linn Crosetto <linn@hp.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-03-12vmcore-dmesg stack smashing happend in extreme caseArthur Zou
Description in dump_dmesg_structured() the out_buf size is 4096, and if the length is less than 4080( 4096-16 ) it won't really write out. Normally, after writing one or four chars to the out_buf, it will check the length of out_buf. But in extreme cases, 19 chars was written to the out_buf before checking the length. This may cause the stack corruption. If the length was 4079 (won't realy write out), and then write 19 chars to it. the out_buf will overflow. Solution Change 16 to 64 thus can make sure that always have 64bytes before moving to next records. why using 64 is that a long long int can take 20 bytes. so the length of timestamp can be 44 ('[','.',']',' ') in extreme case. Signed-off-by: Arthur Zou <zzou@redhat.com> Acked-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-03-06kexec-tools 2.0.6Simon Horman
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-03-06Fix an off-by-one in locate_hole()Matthew Fleming
Fix an off-by-one in locate_hole() that can cause it to return a range that was previously allocated. In upgrading to kexec-tools 2.0.5 I first got the error "Overlapping memory segments at 0xbeff000" Adding some debugging I found locate_hole was returning incorrect values. The below is from the debug I added: XXXMDF: look for hole size 100000, cur range [52b3000, bffffff] size 6d4cfff XXXMDF: look for hole memsz=100000, found beff000 Hmm, if we wanted 0x100000 bytes ending at 0xbffffff, that should be 0xbf00000, not 0xbef000. Continuing to the second invocation: XXXMDF: look for hole size 1000, cur range [52b3000, befefff] size 6c4bfff XXXMDF: look for hole size 1000, cur range [bfff000, bffffff] size fff XXXMDF: look for hole memsz=1000, found bffe000 Now we die with overlapping ranges, since the 0x100000 bytes at 0xbeff000 overlaps 0x1000 bytes at 0xbffe000. Signed-off-by: Matthew Fleming <mdf356@gmail.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-02-06kernel image probe function return value checking fixDave Young
Currently kexec will use the kernel image type when probe function return value >=0. It looks odd, but previously it works. Since commit bf06cf2095 it does not work anymore. During my testing for arm zImage, in 2nd kernel the atags pointer and the machine_id are not valid, I did a lot of debugging in kernel, finally I found this is caused by a kexec tools bug instead. Because uImage will be probed before zImage, also the uImage probe return 1 instead of -1 since bf06cf2095, thus kexec will mistakenly think it is uImage. Fix this issue by regarding it's valid only when probe return 0. Signed-off-by: Dave Young <dyoung@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-02-06zImage_ppc64_probe: return 0 instead of 1 in case of successDave Young
All other _probe functions return 0 for probing the kernel image successfully, so there's no reason to return 1 here. Fix it to return 0 instead. Signed-off-by: Dave Young <dyoung@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-02-06i386: fix redefinition error for e820entryTony Jones
At least on our systems, xenctrl.h defines (unguarded) struct e820entry Move the (guarded) definition in include/x86/x86-linux.h to below. Signed-off-by: Tony Jones <tonyj@suse.de> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-02-06i386: fix build failure (bzImage_support_efi_boot)Tony Jones
Commit 9c200a85de2245a850546fded96a1977b84ad24d referenced 'bzImage_support_efi_boot' without matching 32-bit definition. Signed-off-by: Tony Jones <tonyj@suse.de> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-02-06kexec-tools 2.0.5.gitSimon Horman
Add .git to version so it doesn't look like a release. This is just so when people build code from git it can be identified as such from the version string. Signed-off-by: Simon Horman <horms@verge.net.au>
2014-02-05kexec-tools 2.0.5Simon Horman
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-02-05Add ppc64_asm.h to distributionSimon Horman
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-02-04Avoid buffer overflow on strncat usageDirk Mueller
strncat() does not want the total size but the maximum length (without trailing NUL) that can still be added. Switch over to snprintf which is both more readable and avoids this issue. Signed-off-by: Dirk Mueller <dmueller@suse.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-02-04kexec/ppc64 Enable early kernel's OPAL callsLaurent Dufour
When the kernel is built with CONFIG_PPC_EARLY_DEBUG_OPAL set, it is expecting to get r8 and r9 filled respectively with OPAL base address and OPAL entry address (arc/power/head_64.S). On the new powernv platform, having these 2 registers set allows the kernel to perform OPAL calls before it parse the device tree. Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Tested-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-02-04kexec/ppc64 ELF ABIv2 ABI supportLaurent Dufour
When building in PPC64 little endian mode, the compiler is now using the new ABI v2. Among other changes, this new ABI removes the function descriptors and changes the way the TOC address is computed when entering a C function. The purgatory assembly part where the dot symbols are removed, and ELF relocation code are impacted in this patch. Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-01-31ppc64/kexec/purgatory Fix RTAS calls in Little Endian mode.Laurent Dufour
RTAS is expecting parameters in Big Endian order so we have to byte swap them in LE mode. In the purgatory RTAS calls are only made for debug output. Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-01-31kexec/ppc64 fix device tree endianess issues for memory attributesLaurent Dufour
All the attributes exposed in the device tree are in Big Endian format. This patch add the byte swap operation for some entries which were not yet processed, including those fixed by the following kernel's patch : https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-January/114720.html To work on PPC64 Little Endian mode, kexec now requires that the kernel's patch mentioned above is applied on the kexecing kernel. Tested on ppc64 LPAR (kexec/dump) and ppc64le in a Qemu/KVM guest (kexec) Changes from v1 : * add processing of the following entries : - ibm,dynamic-reconfiguration-memory - chosen/linux,kernel-end - chosen/linux,crashkernel-base & size - chosen/linux,memory-limit - chosen/linux,htab-base & size - linux,tce-base & size - memory@/reg Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-01-21Passing efi related data via setup_dataDave Young
For supporting efi runtime, several efi physical addresses fw_vendor, runtime, config tables, smbios and the whole runtime mapping info need to be used in kexec kernel. Thus introduce setup_data struct for passing these data. collect the varialbes from /sys/firmware/efi/systab and /sys/firmware/efi/runtime-map Signed-off-by: Dave Young <dyoung@redhat.com> Tested-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-01-21Add efi_info in x86 setup headerDave Young
For supporting efi runtime on kexec kernel we need to fill the efi_info struct in setup_header. I just get the info in kernel exported boot_params data in debugfs. Signed-off-by: Dave Young <dyoung@redhat.com> Tested-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-01-21Add function get_bootparamDave Young
Not only setup_subarch will get data from debugfs file boot_params/data, later code for adding efi_info will also need do same thing. Thus add a common function here for later use. Signed-off-by: Dave Young <dyoung@redhat.com> Tested-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-01-21build fix: include x86-linux.h in x86-linux-setup.hDave Young
There's build warnings about using struct x86_linux_param_header * in x86-linux-setup.h, it is declared in x86-linux.h Fix it by include x86-linux.h in x86-linux-setup.h Signed-off-by: Dave Young <dyoung@redhat.com> Tested-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-01-16Fix value of mbi->mem_lower for multiboot-x86Peter Chubb
In the multiboot header, there is a field, `mem_lower' that is meant to contain the size of memory starting at zero and ending below 640k. If your kernel is compiled with CONFIG_X86_RESERVE_LOW non zero (the usual case), then a hole is inserted into kernel's physical memory map at zero, so the test to find the size of this region in kexec/arch/i386/kexec-multiboot-x86.c never succeeds, so the value is always zero. On a PC99 architecture, there is always memory at physycal address zero; assume that a region that starts below 64k actually starts at zero, and use it for the mem_lower variable. Signed-off-by: Peter Chubb <peter.chubb@nicta.com.au> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-01-15vmcore-dmesg: print white-space charactersWANG Chao
Some sort of space like "\t" "\n" are used in kernel log. But we treat them as non-printables and output "\x20%x" for each non-printable. So let's fix it. Signed-off-by: WANG Chao <chaowang@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-01-14kexec: arm: Fix endianness in crashdump headerTaras Kondratiuk
Currently little-endian ELFDATA is hard-coded in crashdump header. This lead to a wrong header format if crashdump is generated on BE system. Set native endianness into ELFDATA field. Signed-off-by: Taras Kondratiuk <taras.kondratiuk@linaro.org> Signed-off-by: Simon Horman <horms@verge.net.au>
2014-01-13vmcore-dmesg: struct_val_u64() not casting u64 to u32WANG Chao
It seems gcc doesn't check return type from inline function. struct_val_u64() should return u64 otherwise upper 32bit is lost. Signed-off-by: WANG Chao <chaowang@redhat.com> Acked-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-12-13kexec: Add m68k supportGeert Uytterhoeven
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-12-13kexec: Extract slurp_fd()Geert Uytterhoeven
Factor out the common part of slurp_file() and slurp_file_len() into a new helper function slurp_fd(). Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Dave Young <dyoung@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-12-13kexec: Let slurp_file_len() return the number of bytes readGeert Uytterhoeven
Add an optional output parameter to slurp_file_len() so it can return the actual number of bytes read. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Dave Young <dyoung@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-12-06kexec: Fix add_usable_memory to use buf of type uint64_t.Mahesh Salgaonkar
A switchover from /kexec/arch/ppc64/fs2dt.c to common code under /kexec/fs2dt.c broke the kdump on ppc64. The function add_usable_memory() assumes that 'memory@*' node exports two 32bit values and fails to populate mem ranges correctly. On ppc64, 'memory@*' exports two 64bit values as below: # hexdump /proc/device-tree/memory\@0/reg 0000000 0000 0000 0000 0000 0000 0000 0800 0000 0000010 # This patch fixes add_usable_memory() to use buf[2] of type uint64_t. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-12-03kexec/xen: Fix typo in __i386__ preprocessor identifierAndrew Cooper
This typo was introduced in c/s c0b4a3f95dd80256cc6d7084436235e69b4933fb It prevents a 32bit build of kexec from loading a 32bit crash image. Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-12-03kexec-tools/xen: Remove redundant includeDaniel Kiper
Remove redundant include of stdlib.h introduced by commit d01680c28ba7bf1e02f74aa5841247a45738f5d4 (kexec/xen: Correct some compile errors). Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-12-03kexec-tools/xen: Do not call xc_interface_close() if xc_interface_open() failedDaniel Kiper
Do not call xc_interface_close() if xc_interface_open() failed. xc_interface_close() crashes if it gets NULL as an argument. Relevant fix for libxenctrl will be posted too but kexec-tools should also behave properly. Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-11-19kexec/xen: Correct some compile errorsSimon Horman
Correct various problems introduced by 08cf823704b0fa3b ("kexec/xen: directly load images images into Xen"). These all relate to the case here HAVE_LIBXENCTRL is not set. Signed-off-by: Simon Horman <horms@verge.net.au>
2013-11-19kexec/xen: directly load images images into XenDavid Vrabel
Xen 4.4 has an improvided kexec hypercall ABI that allows images to be loaded and executed without any kernel involvement. Use the API provided by libxc to load images when running in a Xen guest. Support for loading images via the kexec_load syscall in non-upstream ("classic") Xen kernels is no longer supported. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-11-19kexec/xen: switch to use xc_kexec_get_range for get_xen_vmcoreinfo.Don Slutz
Signed-off-by: Don Slutz <Don@CloudSwitch.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-11-19kexec/xen: use libxc to get location of crash notesDavid Vrabel
Use xc_kexec_get_range(KEXEC_RANGE_MA_CPU) instead of parsing /proc/iomem (which is only populated by non-upstream ("classic") Xen kernels). Signed-off-by: David Vrabel <david.vrabel@citrix.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-11-19kexec/xen: require libxc from Xen 4.4David Vrabel
libxc from Xen 4.4 added xc_kexec_load() which will be required to load images into Xen in the future. Remove all the #ifdef'ery for older versions of libxc. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-11-19kexec/ppc64: bring up new ppc64le architectureLaurent Dufour
This patch provides support for the new Power PC litte endian (LE) mode. The LE mode only differs in the way the instructions and data are stored in memory thus there is no real need to duplicate the ppc64 code. However some compilation's options, especially for the purgatory, differ between little and big endian mode's support. A new "SUBARCH" build variable is introduced which is currently only used for PPC64 to specify the endianness. Another set of changes in this patch is fixing minor endianess issues in the ppc64 code and fix an alignment issue raised on Power7 little endian mode. Among these fixes, the check on the kernel binary endianess is removed, since we can imagine kexecing a LE kernel from a BE environment, as far as the specified root filesystem and initrd file are containing the right binaries. This patch depends on the patch "kexec/ppc64: use common architecture fs2dt.c file" I sent earlier on the kexec mailing list. Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-11-19kexec/ppc64: use common architecture fs2dt.c fileLaurent Dufour
Following the commit 'b3c2962 fs2dt: Add a generic copy of fs2dt' which introduced a generic fs2dt file, this patch is removing the ppc64 architecture's one. Tests have been done successfully on Power 7 plateform. Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-11-14arm: add command line option for the total image sizeDaniel Mack
Currently, kexec on arm assumes that it's safe to place binary images such as atags, dtb or initrd at an estimated offset after the load address. That estimated offset is set to 4 times the size of the compressed image, hence assuming a minimum compression ratio of 1:4. While that assumption matches what the in-kernel compressors are able to achive, it doesn't take into account the .bss section the kernel image carries, and which can grow to arbitrary sizes while not accounting to the compressed image size. After decompression, and before the execution of the compressed kernel, the .bss area is initialized to zeros, trampeling over the binary images in case they happen to live in that piece of memory. Unfortunately, determining the full image size is not easiliy possible at runtime, as it would include doing all possible ways of decompression and then walk the ELF sections by hand. For now, allow users to override the static offset with a new, arm specific command line argument. Users are supposed to set this, and determine a sane value by using 'arm-linux-size vmlinux'. Signed-off-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-10-17kexec/fs2dt: fix endianess conversionLaurent Dufour
While reviewing fs2dt.c in the common kexec directory, in order to use it to support little endian ppc64 architecture, I found some endianess conversion's issues. In dt_reserve, dt_base is a pointer and thus should not be converted. In checkprop, values read from the device tree are big endian encoded and should be converted if CPU is running in little endian mode. In add_dyn_reconf_usable_mem_property__, fix extraneous endianess conversion of rlen which should be natively used to increase the dt pointer. Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-10-16Remove PACKED macro and use __attribute__((packed)) directlyWANG Chao
People are not always aware of PACKED macro and tend to __attribute__((packed)) more directly. So let's remove PACKED to unify things. Signed-off-by: WANG Chao <chaowang@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-10-04kexec: Handle read errors in fs2dt setupGeoff Levand
The putnode() routine in fs2dt.c was not checking for errors returned from calls to read(). Add checks for these errors and abort the setup of printing from purgatory if the checks fail. Signed-off-by: Geoff Levand <geoff@infradead.org> Signed-off-by: Simon Horman <horms@verge.net.au>
2013-10-04kexec: Fix return value build warningsGeoff Levand
Add a local variable 'result' to the putnode() routine of ds2dt and use it to hold return values of calls to read(). Fixes build warnings like these: kexec/fs2dt.c: warning: ignoring return value of ‘read’ Signed-off-by: Geoff Levand <geoff@infradead.org> for Huawei, Linaro Signed-off-by: Simon Horman <horms@verge.net.au>
2013-10-03kexec: Fix off-by-one errors in locate_hole()Geert Uytterhoeven
When calling locate_hole() with "hole_size" equal to the size of an available memory block, it fails to use that memory block. "end" and "hole_max" point to the last byte within the range, hence - "size = end - start" is one less than "hole_size", - "hole_base + hole_size" is one more than "hole_max". Subtract one from "hole_size" when doing the comparison (adding 1 to "size" could overflow in case of one big range covering the whole address space). But explicitly check if "hole_size" is zero first, to handle this case without causing underflows. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Simon Horman <horms@verge.net.au>
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