Michael Holzheu
be8a8d069e
vmcore: introduce ELF header in new memory feature ...
For s390 we want to use /proc/vmcore for our SCSI stand-alone dump
(zfcpdump). We have support where the first HSA_SIZE bytes are saved into
a hypervisor owned memory area (HSA) before the kdump kernel is booted.
When the kdump kernel starts, it is restricted to use only HSA_SIZE bytes.
The advantages of this mechanism are:
* No crashkernel memory has to be defined in the old kernel.
* Early boot problems (before kexec_load has been done) can be dumped
* Non-Linux systems can be dumped.
We modify the s390 copy_oldmem_page() function to read from the HSA memory
if memory below HSA_SIZE bytes is requested.
Since we cannot use the kexec tool to load the kernel in this scenario,
we have to build the ELF header in the 2nd (kdump/new) kernel.
So with the following patch set we would like to introduce the new
function that the ELF header for /proc/vmcore can be created in the 2nd
kernel memory.
The following steps are done during zfcpdump execution:
1. Production system crashes
2. User boots a SCSI disk that has been prepared with the zfcpdump tool
3. Hypervisor saves CPU state of boot CPU and HSA_SIZE bytes of memory into HSA
4. Boot loader loads kernel into low memory area
5. Kernel boots and uses only HSA_SIZE bytes of memory
6. Kernel saves registers of non-boot CPUs
7. Kernel does memory detection for dump memory map
8. Kernel creates ELF header for /proc/vmcore
9. /proc/vmcore uses this header for initialization
10. The zfcpdump user space reads /proc/vmcore to write dump to SCSI disk
- copy_oldmem_page() copies from HSA for memory below HSA_SIZE
- copy_oldmem_page() copies from real memory for memory above HSA_SIZE
Currently for s390 we create the ELF core header in the 2nd kernel with a
small trick. We relocate the addresses in the ELF header in a way that
for the /proc/vmcore code it seems to be in the 1st kernel (old) memory
and the read_from_oldmem() returns the correct data. This allows the
/proc/vmcore code to use the ELF header in the 2nd kernel.
This patch:
Exchange the old mechanism with the new and much cleaner function call
override feature that now offcially allows to create the ELF core header
in the 2nd kernel.
To use the new feature the following function have to be defined
by the architecture backend code to read from new memory:
* elfcorehdr_alloc: Allocate ELF header
* elfcorehdr_free: Free the memory of the ELF header
* elfcorehdr_read: Read from ELF header
* elfcorehdr_read_notes: Read from ELF notes
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Cc: Jan Willeke <willeke@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:59:10 -07:00
dmaengine: PL08x: Add support for PL080S variant
2013-09-02 11:49:56 +05:30
bcma: add bcma_core_pci_power_save()
2013-08-26 14:09:03 -04:00
can: mcp251x: Eliminate irq_flags from driver platform_data
2013-08-21 09:28:29 +02:00
libceph: fix invalid unsigned->signed conversion for timespec encoding
2013-07-09 12:18:06 -07:00
lib: add support for LZ4-compressed kernel
2013-07-09 10:33:30 -07:00
dma: mmp_pdma: add filter function
2013-08-14 13:55:15 +05:30
extcon: Add an API to get extcon device from dt node
2013-08-05 08:52:45 +09:00
fsl /bestcomm
dma: mxs-dma: remove code left from generic DMA binding conversion
2013-08-19 14:20:21 +05:30
ARM: SoC cleanups for 3.12
2013-09-06 13:21:16 -07:00
iio: trigger: implement devm_iio_trigger_alloc/devm_iio_triger_free
2013-08-17 19:34:52 +01:00
For the 3.11 merge we only have one new MFD driver for the Kontron PLD.
2013-07-10 11:10:27 -07:00
ARM: SoC late changes for v3.12
2013-09-09 16:35:29 -07:00
MMC highlights for 3.12:
2013-09-10 13:33:09 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-09-05 14:54:29 -07:00
net/mlx5_core: Support MANAGE_PAGES and QUERY_PAGES firmware command changes
2013-08-15 15:42:57 -07:00
mmc: sdhci: get voltage from sdhc host
2013-08-26 11:32:07 -04:00
mtd: add a new ecc_step_size field to mtd_info{}
2013-08-30 21:37:01 +01:00
netfilter: export xt_HMARK.h to userland
2013-08-14 10:48:05 +02:00
pinctrl: Pass all configs to driver on pin_config_set()
2013-08-28 13:34:41 +02:00
Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
2013-09-10 13:37:36 -07:00
power: Add twl4030_madc battery driver.
2013-08-30 17:34:52 -07:00
md update for v3.12
2013-09-10 13:03:41 -07:00
Merge remote-tracking branch 'regulator/topic/ramp' into regulator-next
2013-09-01 13:50:20 +01:00
MMC highlights for 3.12:
2013-09-10 13:33:09 -07:00
Merge branch 'nfsd-next' of git://linux-nfs.org/~bfields/linux
2013-09-10 20:04:59 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-09-05 14:54:29 -07:00
include: Convert ethernet mac address declarations to use ETH_ALEN
2013-08-02 12:33:54 -07:00
ACPI / sleep: Introduce acpi_os_prepare_extended_sleep() for extended sleep path
2013-07-31 14:20:39 +02:00
libata: Add support for SEND/RECEIVE FPDMA QUEUED
2013-08-25 09:39:12 -04:00
ARM: atmel-ssc: change phybase type to dma_addr_t
2013-07-15 11:07:56 +01:00
serial: at91: distinguish usart and uart
2013-07-29 13:04:12 -07:00
mm/page-writeback.c: add strictlimit feature
2013-09-11 15:58:04 -07:00
exec: kill "int depth" in search_binary_handler()
2013-09-11 15:59:04 -07:00
direct-io: Implement generic deferred AIO completions
2013-09-04 09:23:46 -04:00
userns: Kill nsown_capable it makes the wrong thing easy
2013-08-30 23:44:11 -07:00
cgroup: implement CFTYPE_NO_PREFIX
2013-08-26 18:40:56 -04:00
cgroup: remove bcache_subsys_id which got added stealthily
2013-07-09 16:30:35 -07:00
clk: add support for clock reparent on set_rate
2013-08-19 12:27:17 -07:00
clk: wrap I/O access for improved portability
2013-08-27 17:50:38 -07:00
block: support embedded device command line partition
2013-09-11 15:56:57 -07:00
include/linux/coda.h: remove useless '#else'
2013-07-30 11:11:44 +02:00
syscalls.h: add forward declarations for inplace syscall wrappers
2013-09-11 15:58:25 -07:00
vtime: Optimize full dynticks accounting off case with static keys
2013-08-14 17:14:54 +02:00
context_tracking: Split low level state headers
2013-08-14 17:14:51 +02:00
Merge branch 'pm-cpufreq'
2013-08-27 01:44:40 +02:00
cpufreq: Drop the owner field from struct cpufreq_driver
2013-08-10 03:24:47 +02:00
cpuidle: Add missing forward declarations of structures
2013-07-15 02:09:47 +02:00
vmcore: introduce ELF header in new memory feature
2013-09-11 15:59:10 -07:00
Reinstate "crypto: crct10dif - Wrap crc_t10dif function all to use crypto transform framework"
2013-09-07 12:56:26 +10:00
vfs: reorganize dput() memory accesses
2013-09-08 13:26:18 -07:00
debugfs: provide debugfs_create_x64() when disabled
2013-08-27 22:09:12 -07:00
debugobjects: Make debug_object_activate() return status
2013-08-18 17:39:55 -07:00
dm: add statistics support
2013-09-05 20:46:06 -04:00
Merge branch 'for-v3.12' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping
2013-09-09 10:26:33 -07:00
include: Convert ethernet mac address declarations to use ETH_ALEN
2013-08-02 12:33:54 -07:00
drivers: dma-contiguous: clean source code and prepare for device tree
2013-08-27 09:18:29 +02:00
drivers:net: Convert dma_alloc_coherent(...__GFP_ZERO) to dma_zalloc_coherent
2013-08-29 21:55:23 -04:00
Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
2013-09-10 13:37:36 -07:00
EDAC: Fix lockdep splat
2013-07-23 16:01:28 -07:00
PTR_RET is now PTR_ERR_OR_ZERO
2013-07-15 11:25:00 +09:30
net: etherdevice: add address inherit helper
2013-09-03 20:57:49 -04:00
Kill indirect include of file.h from eventfd.h, use fdget() in cgroup.c
2013-09-07 19:54:57 -04:00
f2fs: support the inline xattrs
2013-08-26 20:15:23 +09:00
firewire: fix libdc1394/FlyCap2 iso event regression
2013-07-27 20:24:36 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2013-09-07 14:35:32 -07:00
fs_enet: cleanup clock API use
2013-08-22 22:13:54 -07:00
FS-Cache: Add interface to check consistency of a cached object
2013-09-06 09:17:30 +01:00
fscache: Netfs function for cleanup post readpages
2013-09-06 09:17:30 +01:00
Merge branch 'rcu/next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
2013-09-03 07:41:11 +02:00
lib/genalloc.c: fix overflow of ending address of memory chunk
2013-09-11 15:57:35 -07:00
hardirq: Split preempt count mask definitions
2013-08-14 17:14:52 +02:00
video/hdmi: Rename HDMI_IDENTIFIER to HDMI_IEEE_OUI
2013-08-30 08:42:01 +10:00
HID: hid-sensor-hub: fix style of comments
2013-08-26 13:46:11 +02:00
HID: hid-sensor-hub: fix style of comments
2013-08-26 13:46:11 +02:00
Merge branches 'for-3.12/devm', 'for-3.12/i2c-hid', 'for-3.12/i2c-hid-dt', 'for-3.12/logitech', 'for-3.12/multitouch-win8', 'for-3.12/trasnport-driver-cleanup', 'for-3.12/uhid', 'for-3.12/upstream' and 'for-3.12/wiimote' into for-linus
2013-09-06 11:58:37 +02:00
HID: hidraw: Add spinlock in struct hidraw to protect list
2013-08-26 21:40:24 +02:00
mm: migrate: check movability of hugepage in unmap_and_move_huge_page()
2013-09-11 15:57:49 -07:00
Drivers: hv: remove HV_DRV_VERSION
2013-08-02 11:34:30 +08:00
i2c: move ACPI helpers into the core
2013-08-23 10:22:29 +02:00
Input: add driver for slidebar on Lenovo IdeaPad laptops
2013-08-26 09:30:03 -07:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
2013-08-29 14:08:24 -04:00
team: add support for sending multicast rejoins
2013-07-23 16:52:47 -07:00
vlan: mask vlan prio bits
2013-07-18 13:05:23 -07:00
net: convert resend IGMP to notifier event
2013-07-23 16:52:47 -07:00
ipv4: expose IPV4_DEVCONF
2013-08-22 20:30:15 -07:00
ipv6: drop fragmented ndisc packets by default (RFC 6980)
2013-08-29 15:32:08 -04:00
jbd: use a single printk for jbd_debug()
2013-08-09 10:49:00 +02:00
jiffies: Avoid undefined behavior from signed overflow
2013-08-20 11:46:54 -07:00
jump_label: Split jumplabel ratelimit
2013-08-09 07:53:54 -07:00
jump_label: Split jumplabel ratelimit
2013-08-09 07:53:54 -07:00
tty: Remove dead code
2013-07-26 16:19:48 -07:00
tracing: Fix trace_dump_stack() proto when CONFIG_TRACING is not set
2013-08-02 22:38:10 -04:00
kobject: delayed kobject release: help find buggy drivers
2013-07-25 15:39:04 -07:00
sysfs: Restrict mounting sysfs
2013-08-28 21:35:14 -07:00
kprobes: allow to specify custom allocator for insn caches
2013-09-11 15:58:52 -07:00
ktime: fix some scripts/kernel-doc warnings
2013-07-25 12:35:39 +02:00
KVM: s390: Make KVM_HVA_ERR_BAD usable on s390
2013-07-29 09:03:53 +02:00
libata: Add support for queued DSM TRIM
2013-08-25 09:39:12 -04:00
linked-list: Remove __list_for_each
2013-07-16 22:00:14 -07:00
tty: Use lockless flip buffer free list
2013-07-23 16:47:08 -07:00
lockdep: Introduce lock_acquire_exclusive()/shared() helper macros
2013-07-12 13:51:18 +02:00
lockref: add ability to mark lockrefs "dead"
2013-09-07 15:49:18 -07:00
lib: add lz4 compressor module
2013-07-09 10:33:30 -07:00
math64: New separate div64_u64_rem helper
2013-08-23 09:02:14 -04:00
bus: mvebu-mbus: Remove the no longer used name-based API
2013-08-06 14:10:45 +00:00
memblock, numa: binary search node id
2013-09-11 15:57:51 -07:00
cgroup: pass around cgroup_subsys_state instead of cgroup in file methods
2013-08-08 20:11:24 -04:00
drivers: base: use standard device online/offline for state change
2013-08-21 11:52:20 -07:00
mm: migrate: remove VM_HUGETLB from vma flag check in vma_migratable()
2013-09-11 15:57:48 -07:00
phy: micrel: Add definitions for common Micrel PHY registers
2013-08-22 23:20:54 +08:00
mm: soft-offline: use migrate_pages() instead of migrate_huge_page()
2013-09-11 15:57:47 -07:00
mm/hwpoison: don't need to hold compound lock for hugetlbfs page
2013-09-11 15:58:08 -07:00
mm: vmscan: fix do_try_to_free_pages() livelock
2013-09-11 15:58:01 -07:00
x86 get_unmapped_area: Access mmap_legacy_base through mm_struct member
2013-08-22 10:19:35 -07:00
mm: vmscan: fix do_try_to_free_pages() livelock
2013-09-11 15:58:01 -07:00
Revert "Input: introduce BTN/ABS bits for drums and guitars"
2013-09-07 09:48:41 -07:00
module: Fix mod->mkobj.kobj potentially freed too early
2013-09-03 16:35:47 +09:30
module: Add flag to allow mod params to have no arguments
2013-08-20 15:37:42 +09:30
vfs: Lock in place mounts from more privileged users
2013-07-24 09:14:46 -07:00
of: pci: add registry of MSI chips
2013-08-12 15:27:01 +00:00
mutex: Move ww_mutex definitions to ww_mutex.h
2013-07-12 12:07:46 +02:00
include: Convert ethernet mac address declarations to use ETH_ALEN
2013-08-02 12:33:54 -07:00
introduce kern_path_mountpoint()
2013-09-08 20:20:23 -04:00
net: add documentation for BQL helpers
2013-09-06 14:43:49 -04:00
netfilter: nf_conntrack: make sequence number adjustments usuable without NAT
2013-08-28 00:26:48 +02:00
NFS: Ensure that rmdir() waits for sillyrenames to complete
2013-09-03 15:26:29 -04:00
NFSv4.1 Use MDS auth flavor for data server connection
2013-09-06 14:49:16 -04:00
nfs4.1: Minimal SP4_MACH_CRED implementation
2013-09-05 10:40:45 -04:00
numa: Mark __node_set() as __always_inline
2013-07-25 21:54:01 +02:00
Rename nsproxy.pid_ns to nsproxy.pid_ns_for_children
2013-08-27 13:52:52 -04:00
NVMe: Use normal shutdown
2013-09-03 16:40:32 -04:00
Device tree core updates for v3.12
2013-09-10 13:53:52 -07:00
of/device: add helper to get cpu device node from logical cpu index
2013-08-21 10:29:51 +01:00
Device tree core updates for v3.12
2013-09-10 13:53:52 -07:00
of: Make of_get_phy_mode() return int i.s.o. const int
2013-08-28 20:50:19 +01:00
of: pci: add registry of MSI chips
2013-08-12 15:27:01 +00:00
drivers: of: add initialization code for dma reserved memory
2013-08-27 10:53:44 +02:00
Staging: olpc_dcon: replace some magic numbers
2013-08-15 17:22:27 -07:00
oprofile: get rid of pointless forward declarations of struct super_block
2013-09-03 22:52:48 -04:00
ACPI / PCI: Make bus registration and unregistration symmetric
2013-07-23 03:58:42 +02:00
ARM: SoC platform changes for 3.12
2013-09-06 13:30:06 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-09-05 14:54:29 -07:00
Merge branch 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-09-04 11:07:04 -07:00
percpu: Make __verify_pcu_ptr handle per cpu pointers to arrays
2013-08-23 16:08:27 -04:00
Merge branch 'x86-spinlocks-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-09-04 11:55:10 -07:00
PM / Sleep: Fix comment typo in pm_wakeup.h
2013-07-15 01:31:37 +02:00
power_supply: Prevent suspend until power supply events are processed
2013-08-27 18:42:48 -07:00
PPS: convert class code to use dev_groups
2013-08-19 21:22:34 -07:00
hardirq: Split preempt count mask definitions
2013-08-14 17:14:52 +02:00
x86, asmlinkage: Make dump_stack visible
2013-08-06 14:21:01 -07:00
pstore: Introduce new argument 'compressed' in the read callback
2013-08-19 10:18:11 -07:00
ARM: pxa: ssp: add pxa_ssp_request_of()
2013-08-14 19:54:30 +01:00
quota: Add a new quotactl command Q_XGETQSTATV
2013-08-20 16:53:58 -05:00
quota: provide interface for readding allocated space into reserved space
2013-08-17 09:32:32 -04:00
rculist: list_first_or_null_rcu() should use list_entry_rcu()
2013-08-18 17:40:16 -07:00
nohz_full: Add full-system-idle state machine
2013-08-31 14:43:50 -07:00
regmap: Updates for v3.12
2013-09-03 10:07:40 -07:00
mutex: Move ww_mutex definitions to ww_mutex.h
2013-07-12 12:07:46 +02:00
lib/scatterlist: introduce sg_pcopy_from_buffer() and sg_pcopy_to_buffer()
2013-07-09 10:33:30 -07:00
include/linux/sched.h: don't use task->pid/tgid in same_thread_group/has_group_leader_pid
2013-09-11 15:56:56 -07:00
xattr: Constify ->name member of "struct xattr".
2013-07-25 19:30:03 +10:00
DMA: shdma: remove private and unused defines from a global header
2013-08-27 14:25:27 +05:30
sh_eth: remove 'register_type' field from 'struct sh_eth_plat_data'
2013-08-20 17:10:41 -07:00
DMA: shdma: switch DT mode to use configuration data from a match table
2013-08-27 14:25:09 +05:30
Introduce [compat_]save_altstack_ex() to unbreak x86 SMAP
2013-09-01 14:16:33 -07:00
skb: allow skb_scrub_packet() to be used by tunnels
2013-09-04 00:27:25 -04:00
smp.h: move !SMP version of on_each_cpu() out-of-line
2013-09-11 15:58:25 -07:00
include: Convert ethernet mac address declarations to use ETH_ALEN
2013-08-02 12:33:54 -07:00
net: move iov_pages() to net/core/iovec.c
2013-08-07 16:52:33 -07:00
sched: fix the theoretical signal_wake_up() vs schedule() race
2013-08-13 08:19:26 -07:00
driver:net:stmmac: Disable DMA store and forward mode if platform data force_thresh_dma_mode is set.
2013-08-30 17:26:09 -04:00
swap: clean-up #ifdef in page_mapping()
2013-09-11 15:57:31 -07:00
mm: save soft-dirty bits on swapped pages
2013-08-13 17:57:47 -07:00
syscalls.h: add forward declarations for inplace syscall wrappers
2013-09-11 15:58:25 -07:00
sysfs: sysfs_create_groups returns a value.
2013-08-28 09:51:41 -07:00
tcp: Remove unused tcpct declarations and comments
2013-07-31 12:16:45 -07:00
tegra-cpuidle: provide stub when !CONFIG_CPU_IDLE
2013-08-29 13:54:34 -07:00
Merge branch 'timers/nohz-v3' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into timers/nohz
2013-08-14 17:58:56 +02:00
tty: Fix lock order in tty_do_resize()
2013-07-24 15:12:53 -07:00
tty: Fix unsafe vt paste_selection()
2013-07-23 16:47:10 -07:00
tty: Make ldisc input flow control concurrency-friendly
2013-07-23 16:42:59 -07:00
USB: introduce usb_device_no_sg_constraint() helper
2013-08-12 11:56:16 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2013-09-07 14:35:32 -07:00
vfio: add external user support
2013-08-05 10:52:36 -06:00
gpu/vga_switcheroo: add driver control power feature. (v3)
2013-08-29 13:30:21 +10:00
i915: Update VGA arbiter support for newer devices
2013-09-03 19:17:59 +02:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-07-09 18:24:39 -07:00
mm: vmstats: track TLB flush stats on UP too
2013-09-11 15:57:09 -07:00
Merge branch 'for-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2013-09-03 18:25:03 -07:00
mm: vmscan: fix do_try_to_free_pages() livelock
2013-09-11 15:58:01 -07:00
vtime: Optimize full dynticks accounting off case with static keys
2013-08-14 17:14:54 +02:00
[SCSI] zfcp: fix lock imbalance by reworking request queue locking
2013-08-22 08:53:30 -07:00
workqueue: mark WQ_NON_REENTRANT deprecated
2013-07-30 08:30:16 -04:00
mm/writeback: make writeback_inodes_wb static
2013-09-11 15:58:02 -07:00
mutex: Move ww_mutex definitions to ww_mutex.h
2013-07-12 12:07:46 +02:00
xattr: Constify ->name member of "struct xattr".
2013-07-25 19:30:03 +10:00
zbud: add to mm/
2013-07-10 18:11:34 -07:00
