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2012-09-05KVM: x86: more constificationMathias Krause
Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-09-05KVM: x86: constify read_write_emulator_opsMathias Krause
We never change those, make them r/o. Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-09-05KVM: x86 emulator: constify emulate_opsMathias Krause
We never change emulate_ops[] at runtime so it should be r/o. Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-09-05KVM: x86 emulator: mark opcode tables constMathias Krause
The opcode tables never change at runtime, therefor mark them const. Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-09-05KVM: x86 emulator: use aligned variants of SSE register opsMathias Krause
As the the compiler ensures that the memory operand is always aligned to a 16 byte memory location, use the aligned variant of MOVDQ for read_sse_reg() and write_sse_reg(). Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-09-05KVM: x86: minor size optimizationMathias Krause
Some fields can be constified and/or made static to reduce code and data size. Numbers for a 32 bit build: text data bss dec hex filename before: 3351 80 0 3431 d67 cpuid.o after: 3391 0 0 3391 d3f cpuid.o Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-09-04KVM: cleanup pic resetGleb Natapov
kvm_pic_reset() is not used anywhere. Move reset logic from pic_ioport_write() there. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-08-30KVM: x86: remove unused variable from kvm_task_switch()Marcelo Tosatti
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: VMX: Ignore segment G and D bits when considering whether we can virtualizeAvi Kivity
We will enter the guest with G and D cleared; as real hardware ignores D in real mode, and G is taken care of by the limit test, we allow more code to run in vm86 mode. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: VMX: Save all segment data in real modeAvi Kivity
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: VMX: Preserve segment limit and access rights in real modeAvi Kivity
While this is undocumented, real processors do not reload the segment limit and access rights when loading a segment register in real mode. Real programs rely on it so we need to comply with this behaviour. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: VMX: Return real real-mode segment data even if ↵Avi Kivity
emulate_invalid_guest_state=1 emulate_invalid_guest_state=1 doesn't mean we don't munge the segments in the vmcs; we do. So we need to return the real ones (maintained by vmx_set_segment). Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: x86 emulator: Fix #GP error code during linearizationAvi Kivity
We want the segment selector, nor segment number. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: x86 emulator: Check segment limits in real mode tooAvi Kivity
Segment limits are verified in real mode, not just protected mode. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: x86 emulator: Leave segment limit and attributs alone in real modeAvi Kivity
When loading a segment in real mode, only the base and selector must be modified. The limit needs to be left alone, otherwise big real mode users will hit a #GP due to limit checking (currently this is suppressed because we don't check limits in real mode). Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: VMX: Allow vm86 virtualization of big real modeAvi Kivity
Usually, big real mode uses large (4GB) segments. Currently we don't virtualize this; if any segment has a limit other than 0xffff, we emulate. But if we set the vmx-visible limit to 0xffff, we can use vm86 to virtualize real mode; if an access overruns the segment limit, the guest will #GP, which we will trap and forward to the emulator. This results in significantly faster execution, and less risk of hitting an unemulated instruction. If the limit is less than 0xffff, we retain the existing behaviour. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: VMX: Allow real mode emulation using vm86 with dpl=0Avi Kivity
Real mode is always entered from protected mode with dpl=0. Since the dpl doesn't affect execution, and we already override it to 3 in the vmcs (as vmx requires), we can allow execution in that state. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: VMX: Retain limit and attributes when entering protected modeAvi Kivity
Real processors don't change segment limits and attributes while in real mode. Mimic that behaviour. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: VMX: Use kvm_segment to save protected-mode segments when entering realmodeAvi Kivity
Instead of using struct kvm_save_segment, use struct kvm_segment, which is what the other APIs use. This leads to some simplification. We replace save_rmode_seg() with a call to vmx_save_segment(). Since this depends on rmode.vm86_active, we move the call to before setting the flag. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: VMX: Fix incorrect lookup of segment S flag in fix_pmode_dataseg()Avi Kivity
fix_pmode_dataseg() looks up S in ->base instead of ->ar_bytes. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: VMX: Separate saving pre-realmode state from setting segmentsAvi Kivity
Commit b246dd5df139 ("KVM: VMX: Fix KVM_SET_SREGS with big real mode segments") moved fix_rmode_seg() to vmx_set_segment(), so that it is applied not just on transitions to real mode, but also on KVM_SET_SREGS (migration). However fix_rmode_seg() not only munges the vmcs segments, it also sets up the save area for us to restore when returning to protected mode or to return in vmx_get_segment(). Move saving the segment into a new function, save_rmode_seg(), and call it just during the transition. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: x86 emulator: access GPRs on demandAvi Kivity
Instead of populating the entire register file, read in registers as they are accessed, and write back only the modified ones. This saves a VMREAD and VMWRITE on Intel (for rsp, since it is not usually used during emulation), and a two 128-byte copies for the registers. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27KVM: PPC: book3s: fix build error caused by gfn_to_hva_memslot()Gavin Shan
The build error was caused by that builtin functions are calling the functions implemented in modules. This error was introduced by commit 4d8b81abc4 ("KVM: introduce readonly memslot"). The patch fixes the build error by moving function __gfn_to_hva_memslot() from kvm_main.c to kvm_host.h and making that "inline" so that the builtin function (kvmppc_h_enter) can use that. Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-26Merge remote-tracking branch 'upstream/master' into queueMarcelo Tosatti
Merging critical fixes from upstream required for development. * upstream/master: (809 commits) libata: Add a space to " 2GB ATA Flash Disk" DMA blacklist entry Revert "powerpc: Update g5_defconfig" powerpc/perf: Use pmc_overflow() to detect rolled back events powerpc: Fix VMX in interrupt check in POWER7 copy loops powerpc: POWER7 copy_to_user/copy_from_user patch applied twice powerpc: Fix personality handling in ppc64_personality() powerpc/dma-iommu: Fix IOMMU window check powerpc: Remove unnecessary ifdefs powerpc/kgdb: Restore current_thread_info properly powerpc/kgdb: Bail out of KGDB when we've been triggered powerpc/kgdb: Do not set kgdb_single_step on ppc powerpc/mpic_msgr: Add missing includes powerpc: Fix null pointer deref in perf hardware breakpoints powerpc: Fixup whitespace in xmon powerpc: Fix xmon dl command for new printk implementation xfs: check for possible overflow in xfs_ioc_trim xfs: unlock the AGI buffer when looping in xfs_dialloc xfs: fix uninitialised variable in xfs_rtbuf_get() powerpc/fsl: fix "Failed to mount /dev: No such device" errors powerpc/fsl: update defconfigs ... Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-25Merge tag 'fixes-3.6-rc3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull arm-soc fixes from Arnd Bergmann: "Bug fixes for various ARM platforms. About half of these are for OMAP and submitted before but did not make it into v3.6-rc2." * tag 'fixes-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (39 commits) ARM: ux500: don't select LEDS_GPIO for snowball ARM: imx: build i.MX6 functions only when needed ARM: imx: select CPU_FREQ_TABLE when needed ARM: imx: fix ksz9021rn_phy_fixup ARM: imx: build pm-imx5 code only when PM is enabled ARM: omap: allow building omap44xx without SMP ARM: dts: imx51-babbage: fix esdhc cd/wp properties ARM: imx6: spin the cpu until hardware takes it down ARM: ux500: Ensure probing of Audio devices when Device Tree is enabled ARM: ux500: Fix merge error, no matching driver name for 'snd_soc_u8500' ARM i.MX6q: Add virtual 1/3.5 dividers in the LDB clock path ARM: Kirkwood: fix Makefile.boot ARM: Kirkwood: Fix iconnect leds ARM: Orion: Set eth packet size csum offload limit ARM: mv78xx0: fix win_cfg_base prototype ARM: OMAP: dmtimers: Fix locking issue in omap_dm_timer_request*() ARM: mmp: fix potential NULL dereference ARM: OMAP4: Register the OPP table only for 4430 device cpufreq: OMAP: Handle missing frequency table on SMP systems ARM: OMAP4: sleep: Save the complete used register stack frame ...
2012-08-25Merge tag 'stable/for-linus-3.6-rc3-tag' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen Pull three xen bug-fixes from Konrad Rzeszutek Wilk: - Revert the kexec fix which caused on non-kexec shutdowns a race. - Reuse existing P2M leafs - instead of requiring to allocate a large area of bootup virtual address estate. - Fix a one-off error when adding PFNs for balloon pages. * tag 'stable/for-linus-3.6-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/setup: Fix one-off error when adding for-balloon PFNs to the P2M. xen/p2m: Reuse existing P2M leafs if they are filled with 1:1 PFNs or INVALID. Revert "xen PVonHVM: move shared_info to MMIO before kexec"
2012-08-25Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc fixes from Benjamin Herrenschmidt: "I meant to sent that earlier but got swamped with other things, so here are some powerpc fixes for 3.6. A few regression fixes and some bug fixes that I deemed should still make it. There's a FSL update from Kumar with a bunch of defconfig updates along with a few embedded fixes. I also reverted my g5_defconfig update that I merged earlier as it was completely busted, not too sure what happened there, I'll do a new one later." * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: Revert "powerpc: Update g5_defconfig" powerpc/perf: Use pmc_overflow() to detect rolled back events powerpc: Fix VMX in interrupt check in POWER7 copy loops powerpc: POWER7 copy_to_user/copy_from_user patch applied twice powerpc: Fix personality handling in ppc64_personality() powerpc/dma-iommu: Fix IOMMU window check powerpc: Remove unnecessary ifdefs powerpc/kgdb: Restore current_thread_info properly powerpc/kgdb: Bail out of KGDB when we've been triggered powerpc/kgdb: Do not set kgdb_single_step on ppc powerpc/mpic_msgr: Add missing includes powerpc: Fix null pointer deref in perf hardware breakpoints powerpc: Fixup whitespace in xmon powerpc: Fix xmon dl command for new printk implementation powerpc/fsl: fix "Failed to mount /dev: No such device" errors powerpc/fsl: update defconfigs booke/wdt: some ioctls do not return values properly powerpc/p4080ds: dts - add usb controller version info and port0 powerpc/85xx: mpc85xx_defconfig - add VIA PATA support for MPC85xxCDS powerpc/fsl-pci: Only scan PCI bus if configured as a host
2012-08-25Merge git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull kvm fixes from Marcelo Tosatti. * git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: x86 emulator: use stack size attribute to mask rsp in stack ops KVM: MMU: Fix mmu_shrink() so that it can free mmu pages as intended ppc: e500_tlb memset clears nothing KVM: PPC: Add cache flush on page map KVM: PPC: Book3S HV: Fix incorrect branch in H_CEDE code KVM: x86: update KVM_SAVE_MSRS_BEGIN to correct value
2012-08-25Merge tag 'for-linus-v3.6-rc4' of git://oss.sgi.com/xfs/xfsLinus Torvalds
Pull xfs bugfixes from Ben Myers: - fix uninitialised variable in xfs_rtbuf_get() - unlock the AGI buffer when looping in xfs_dialloc - check for possible overflow in xfs_ioc_trim * tag 'for-linus-v3.6-rc4' of git://oss.sgi.com/xfs/xfs: xfs: check for possible overflow in xfs_ioc_trim xfs: unlock the AGI buffer when looping in xfs_dialloc xfs: fix uninitialised variable in xfs_rtbuf_get()
2012-08-25Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds
Pull MIPS fixes from Ralf Baechle: "Random fixes across the MIPS tree. The two hotspots are several bugs in the module loader and the ath79 SOC support; also noteworthy is the restructuring of the code to synchronize CPU timers across CPUs on startup; the old code recently ceased to work due to unrelated changes. All except one of these patches have sat for a significant time in linux-next for testing." * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: pci-ar724x: avoid data bus error due to a missing PCIe module MIPS: Malta: Delete duplicate PCI fixup. MIPS: ath79: don't hardcode the unavailability of the DSP ASE MIPS: Synchronize MIPS count one CPU at a time MIPS: BCM63xx: Fix SPI message control register handling for BCM6338/6348. MIPS: Module: Deal with malformed HI16/LO16 relocation sequences. MIPS: Fix race condition in module relocation code. MIPS: Fix memory leak in error path of HI16/LO16 relocation handling. MIPS: MTX-1: Add udelay to mtx1_pci_idsel MIPS: ath79: select HAVE_CLK MIPS: ath79: Use correct IRQ number for the OHCI controller on AR7240 MIPS: ath79: Fix number of GPIO lines for AR724[12] MIPS: Octeon: Fix broken interrupt controller code.
2012-08-25Merge branch 'for-3.6' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
Pull nfsd bugfixes from J. Bruce Fields: "Particular thanks to Michael Tokarev, Malahal Naineni, and Jamie Heilman for their testing and debugging help." * 'for-3.6' of git://linux-nfs.org/~bfields/linux: svcrpc: fix svc_xprt_enqueue/svc_recv busy-looping svcrpc: sends on closed socket should stop immediately svcrpc: fix BUG() in svc_tcp_clear_pages nfsd4: fix security flavor of NFSv4.0 callback
2012-08-25Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull block-related fixes from Jens Axboe: - Improvements to the buffered and direct write IO plugging from Fengguang. - Abstract out the mapping of a bio in a request, and use that to provide a blk_bio_map_sg() helper. Useful for mapping just a bio instead of a full request. - Regression fix from Hugh, fixing up a patch that went into the previous release cycle (and marked stable, too) attempting to prevent a loop in __getblk_slow(). - Updates to discard requests, fixing up the sizing and how we align them. Also a change to disallow merging of discard requests, since that doesn't really work properly yet. - A few drbd fixes. - Documentation updates. * 'for-linus' of git://git.kernel.dk/linux-block: block: replace __getblk_slow misfix by grow_dev_page fix drbd: Write all pages of the bitmap after an online resize drbd: Finish requests that completed while IO was frozen drbd: fix drbd wire compatibility for empty flushes Documentation: update tunable options in block/cfq-iosched.txt Documentation: update tunable options in block/cfq-iosched.txt Documentation: update missing index files in block/00-INDEX block: move down direct IO plugging block: remove plugging at buffered write time block: disable discard request merge temporarily bio: Fix potential memory leak in bio_find_or_create_slab() block: Don't use static to define "void *p" in show_partition_start() block: Add blk_bio_map_sg() helper block: Introduce __blk_segment_map_sg() helper fs/block-dev.c:fix performance regression in O_DIRECT writes to md block devices block: split discard into aligned requests block: reorganize rounding of max_discard_sectors
2012-08-25Merge tag 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev Pull libata fixes from Jeff Garzik: - libata-acpi regression fix - additional or corrected drive quirks for ata_blacklist - Kconfig text tweaking - new PCI IDs - pata_atiixp: quirk for MSI motherboard - export ahci_dev_classify for an ahci_platform driver * tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: libata: Add a space to " 2GB ATA Flash Disk" DMA blacklist entry [libata] new quirk, lift bridge limits for Buffalo DriveStation Quattro [libata] Kconfig: Elaborate that SFF is meant for legacy and PATA stuff [libata] acpi: call ata_acpi_gtm during ata port init time ata_piix: Add Device IDs for Intel Lynx Point-LP PCH ahci: Add Device IDs for Intel Lynx Point-LP PCH pata_atiixp: override cable detection on MSI E350DM-E33 ahci: un-staticize ahci_dev_classify
2012-08-25libata: Add a space to " 2GB ATA Flash Disk" DMA blacklist entryPrarit Bhargava
commit d70e551c8e1ecb6f20422f8db6bfe6a0049edcb8, Add " 2GB ATA Flash Disk"/"ADMA428M" to DMA blacklist, should have added a space before 2GB. Signed-off-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2012-08-24Revert "powerpc: Update g5_defconfig"Benjamin Herrenschmidt
This reverts commit b1acf1bb544cf28c1f4be0a45620fa899c74b7e9. Something went horribly wrong when I did savedefconfig, not sure what, but what's in there is busted so let's revert it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24powerpc/perf: Use pmc_overflow() to detect rolled back eventsSukadev Bhattiprolu
For certain speculative events on Power7, 'perf stat' reports far higher event count than 'perf record' for the same event. As described in following commit, a performance monitor exception is raised even when the the performance events are rolled back. commit 0837e3242c73566fc1c0196b4ec61779c25ffc93 Author: Anton Blanchard <anton@samba.org> Date: Wed Mar 9 14:38:42 2011 +1100 perf_event_interrupt() records an event only when an overflow occurs. But this check for overflow is a simple 'if (val < 0)'. Because the events are rolled back, this check for overflow fails and the event is not recorded. perf_event_interrupt() later uses pmc_overflow() to detect the overflow and resets the counters and the events are lost completely. To properly detect the overflow of rolled back events, use pmc_overflow() even when recording events. To reproduce: $ cat strcpy.c #include <stdio.h> #include <string.h> main() { char buf[256]; alarm(5); while(1) strcpy(buf, "string1"); } $ perf record -e r20014 ./strcpy $ perf report -n > report.1 $ perf stat -e r20014 > report.2 # Compare report.1 and report.2 Reported-by: Maynard Johnson <mpjohn@us.ibm.com> Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24powerpc: Fix VMX in interrupt check in POWER7 copy loopsAnton Blanchard
The enhanced prefetch hint patches corrupt the condition register that was used to check if we are in interrupt. Fix this by using cr1. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24powerpc: POWER7 copy_to_user/copy_from_user patch applied twiceAnton Blanchard
"powerpc: Use enhanced touch instructions in POWER7 copy_to_user/copy_from_user" was applied twice. Remove one. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24powerpc: Fix personality handling in ppc64_personality()Jiri Kosina
Directly comparing current->personality against PER_LINUX32 doesn't work in cases when any of the personality flags stored in the top three bytes are used. Directly forcefully setting personality to PER_LINUX32 or PER_LINUX discards any flags stored in the top three bytes Use personality() macro to compare only PER_MASK bytes and make sure that we are setting only the bits that should be set, instead of overwriting the whole value. Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24powerpc/dma-iommu: Fix IOMMU window checkAaro Koskinen
Checking for device mask to cover the whole IOMMU table is too strict. IOMMU allocators should handle mask constraint properly for each allocation. The patch enables to use old AirPort Extreme cards on PowerMacs with more than 1GB of memory; without the patch the driver init fails with: b43-pci-bridge 0001:01:01.0: Warning: IOMMU window too big for device mask b43-pci-bridge 0001:01:01.0: mask: 0x3fffffff, table end: 0x80000000 b43-phy0 ERROR: The machine/kernel does not support the required 30-bit DMA mask Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24powerpc: Remove unnecessary ifdefsMichael Neuling
Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24powerpc/kgdb: Restore current_thread_info properlyTiejun Chen
For powerpc BooKE and e200, singlestep is handled on the critical/dbg exception stack. This causes current_thread_info() to fail for kgdb internal, so previously We work around this issue by copying the thread_info from the kernel stack before calling kgdb_handle_exception, and copying it back afterwards. But actually we don't do this properly. We should backup current_thread_info then restore that when exit. Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24powerpc/kgdb: Bail out of KGDB when we've been triggeredTiejun Chen
We need to skip a breakpoint exception when it occurs after a breakpoint has already been removed. Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24powerpc/kgdb: Do not set kgdb_single_step on ppcTiejun Chen
The kgdb_single_step flag has the possibility to indefinitely hang the system on an SMP system. The x86 arch have the same problem, and that problem was fixed by commit 8097551d9ab9b9e3630(kgdb,x86: do not set kgdb_single_step on x86). This patch does the same behaviors as x86's patch. Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24powerpc/mpic_msgr: Add missing includesScott Wood
Add several #includes that mpic_msgr relies on being pulled implicitly, which only happens on certain configs. Signed-off-by: Scott Wood <scottwood@freescale.com> Cc: Meador Inge <meador_inge@mentor.com> Cc: Jia Hongtao <B38951@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24powerpc: Fix null pointer deref in perf hardware breakpointsMichael Neuling
Currently if you are doing a global perf recording with hardware breakpoints (ie perf record -e mem:0xdeadbeef -a), you can oops with: Faulting instruction address: 0xc000000000738890 cpu 0xc: Vector: 300 (Data Access) at [c0000003f76af8d0] pc: c000000000738890: .hw_breakpoint_handler+0xa0/0x1e0 lr: c000000000738830: .hw_breakpoint_handler+0x40/0x1e0 sp: c0000003f76afb50 msr: 8000000000001032 dar: 6f0 dsisr: 42000000 current = 0xc0000003f765ac00 paca = 0xc00000000f262a00 softe: 0 irq_happened: 0x01 pid = 6810, comm = loop-read enter ? for help [c0000003f76afbe0] c00000000073cd04 .notifier_call_chain.isra.0+0x84/0xe0 [c0000003f76afc80] c00000000073cdbc .notify_die+0x3c/0x60 [c0000003f76afd20] c0000000000139f0 .do_dabr+0x40/0xf0 [c0000003f76afe30] c000000000005a9c handle_dabr_fault+0x14/0x48 --- Exception: 300 (Data Access) at 0000000010000480 SP (ff8679e0) is in userspace This is because we don't check to see if the break point is associated with task before we deference the task_struct pointer. This changes the update to use current. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24powerpc: Fixup whitespace in xmonMichael Ellerman
There are a few whitespace goolies in xmon.c, some of them appear to be my fault. Fix them all in one go. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24powerpc: Fix xmon dl command for new printk implementationMichael Ellerman
Since the printk internals were reworked the xmon 'dl' command which dumps the content of __log_buf has stopped working. It is now a structured buffer, so just dumping it doesn't really work. Use the helpers added for kgdb to print out the content. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-23Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds
Pull crypto fixes from Herbert Xu: "This push fixes a build error on 32-bit archs in the hifn driver as well as a potential deadlock in the caam driver." * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: caam - fix possible deadlock condition crypto: hifn_795x - fix 64bit division and undefined __divdi3 on 32bit archs
2012-08-23Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs Pull UDF, ext3 & reiserfs fixes from Jan Kara: "A couple of fixes (udf, reiserfs, ext3) that accumulated over my vacation." * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: udf: fix retun value on error path in udf_load_logicalvol jbd: don't write superblock when unmounting an ro filesystem reiserfs: fix deadlocks with quotas quota: Move down dqptr_sem read after initializing default warn[] type at __dquot_alloc_space(). UDF: During mount free lvid_bh before rescanning with different blocksize udf: fix udf_setsize() for file data in ICB
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