- 16 5月, 2008 1 次提交
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由 Huang, Xiaolan 提交于
The patch aims to fix a performance issue for the syscall personality(PER_LINUX32). On IA-64 box, the syscall personality (PER_LINUX32) has poor performance because it failed to find the Linux/x86 execution domain. Then it tried to load the kernel module however it failed always and it used the default execution domain PER_LINUX instead. Requesting kernel modules is very expensive. It caused the performance issue. (see the function lookup_exec_domain in kernel/exec_domain.c). To resolve the issue, execution domain Linux/x86 is always registered in initialization time for IA-64 architecture. Signed-off-by: NXiaolan Huang <xiaolan.huang@intel.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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- 15 5月, 2008 8 次提交
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由 Prarit Bhargava 提交于
acpi_unregister_gsi() should "undo" what acpi_register_gsi() does. On systems that have legacy interrupts, acpi_unregister_gsi erroneously calls iosapci_unregister_intr() which is wrong to do and causes a loud warning. acpi_unregister_gsi() should just return in these cases. Signed-off-by: NPrarit Bhargava <prarit@redhat.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Simon Holm Thøgersen 提交于
There is only palinfo_handle_smp as (indirect) user of palinfo_smp_call (by way of smp_call_function_single) and surely palinfo_handle_smp never pass NULL as parameter for info. Signed-off-by: NSimon Holm Thøgersen <odie@cs.aau.dk> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Hidetoshi Seto 提交于
Fix a typo, and coding style cleanups for pfm_handle_work(). Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Hidetoshi Seto 提交于
This patch does: - make comment at next to resched check more robust - move "re-check" comments to next to where change predicate regs Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Hidetoshi Seto 提交于
[Bug-fix for "[BUG?][2.6.25-mm1] sleeping during IRQ disabled"] This patch does: - enable interrupts before calling schedule() as same as others, ex. x86 - enable interrupts during ia64_do_signal() and ia64_sync_krbs() - do_notify_resume_user() is still called with interrupts disabled, since we can take short path of fsys_mode if-statement quickly. - pfm_handle_work() is also called with interrupts disabled, since it can deal interrupt mask within itself. - fix/add some comments/notes Reported-by: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Alex Chiang 提交于
The sequence executed in check_sal_cache_flush: - pend a timer interrupt - call SAL_CACHE_FLUSH - see if interrupt is still pending can hang HP machines with buggy SAL_CACHE_FLUSH implementations. Provide a kernel command-line argument to allow users skip this check if desired. Using this parameter will force ia64_sal_cache_flush to call ia64_pal_cache_flush() instead of SAL_CACHE_FLUSH. Signed-off-by: NAlex Chiang <achiang@hp.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Bernhard Walle 提交于
Some IA64 machines map all cell-local memory above 4 GB (32 bit limit). However, in most cases, the kernel needs some memory below that limit that is DMA-capable. So in this machine configuration, the crashkernel will be reserved above 4 GB. For machines that use SWIOTLB implementation because they lack an I/O MMU the low memory is required by the SWIOTLB implementation. In that case, it doesn't make sense to reserve the crashkernel at all because it's unusable for kdump. A special case is the "hpzx1" machine vector. In theory, it has a I/O MMU, so it can be booted above 4 GB. However, in the kdump case that is not possible because of changeset 51b58e3e: On HP zx1 machines, the 'machvec=dig' parameter is needed for the kdump kernel to avoid problems with the HP sba iommu. The problem is that during the boot of the kdump kernel, the iommu is re-initialized, so in-flight DMA from improperly shutdown drivers causes an IOTLB miss which leads to an MCA. With kdump, the idea is to get into the kdump kernel with as little code as we can, so shutting down drivers properly is not an option. The workaround is to add 'machvec=dig' to the kdump kernel boot parameters. This makes the kdump kernel avoid using the sba iommu altogether, leaving the IOTLB intact. Any ongoing DMA falls harmlessly outside the kdump kernel. After the kdump kernel reboots, all devices will have been shutdown properly and DMA stopped. This patch pushes that functionality into the sba iommu initialization code, so that users won't have to find the obscure documentation telling them about 'machvec=dig'. This means that also for hpzx1 it's not possible to boot when all memory is above the 4 GB limit. So the only machine vectors that can handle this case are "sn2" and "uv". Signed-off-by: NBernhard Walle <bwalle@suse.de> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Jack Steiner 提交于
This patch adds the basic IA64 machvec infrastructure to support the SGI "UV" platform. Signed-off-by: NJack Steiner <steiner@sgi.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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- 02 5月, 2008 4 次提交
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由 Al Viro 提交于
Races galore... General rule: as soon as it's in descriptor table, it's over; another thread might have started IO on it/dup2() it elsewhere/dup2() something *over* it/etc. fd_install() is the very last step one should take - it's a point of no return. Besides, the damn thing leaked on failure exits... Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Roland McGrath 提交于
Replace TIF_RESTORE_SIGMASK with TS_RESTORE_SIGMASK and define our own set_restore_sigmask() function. This saves the costly SMP-safe set_bit operation, which we do not need for the sigmask flag since TIF_SIGPENDING always has to be set too. Signed-off-by: NRoland McGrath <roland@redhat.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Hidetoshi Seto 提交于
Fix indenting of switch statement to follow CodingStyle, and pull out handling of call_data into an inlined function. I confirmed that applying this fix doesn't affect assembled code. Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Al Viro 提交于
Races galore... General rule: as soon as it's in descriptor table, it's over; another thread might have started IO on it/dup2() it elsewhere/dup2() something *over* it/etc. fd_install() is the very last step one should take - it's a point of no return. Besides, the damn thing leaked on failure exits... Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 01 5月, 2008 5 次提交
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由 Roman Zippel 提交于
Rename div64_64 to div64_u64 to make it consistent with the other divide functions, so it clearly includes the type of the divide. Move its definition to math64.h as currently no architecture overrides the generic implementation. They can still override it of course, but the duplicated declarations are avoided. Signed-off-by: NRoman Zippel <zippel@linux-m68k.org> Cc: Avi Kivity <avi@qumranet.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Howells <dhowells@redhat.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Patrick McHardy <kaber@trash.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Hidetoshi Seto 提交于
This patch silences: WARNING: vmlinux.o(.text+0x44672): Section mismatch in reference from the function arch_register_cpu() to the function .cpuinit.text:register_cpu() Changes are based on codes in arch/x86/kernel/topology.c Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Hidetoshi Seto 提交于
This patch removes following warning: WARNING: vmlinux.o(.exit.text+0xb1): Section mismatch in reference from the function palinfo_exit() to the variable .cpuinit.data:palinfo_cpu_notifier Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Hidetoshi Seto 提交于
This patch shuts up the following: WARNING: vmlinux.o(.text+0x7102): Section mismatch in reference from the function fixup_irqs() to the function .devinit.text:ia64_disable_timer() Removing ia64_disable_timer() is safe because there are no functions calling it other than the fixup_irqs(), Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Hidetoshi Seto 提交于
This patch kills: WARNING: vmlinux.o(.text+0x1702): Section mismatch in reference from the function acpi_register_ioapic() to the function .devinit.text:iosapic_init() Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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- 30 4月, 2008 6 次提交
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由 Alan Cox 提交于
- Operations are now a shared const function block as with most other Linux objects - Introduce wrappers for some optional functions to get consistent behaviour - Wrap put_char which used to be patched by the tty layer - Document which functions are needed/optional - Make put_char report success/fail - Cache the driver->ops pointer in the tty as tty->ops - Remove various surplus lock calls we no longer need - Remove proc_write method as noted by Alexey Dobriyan - Introduce some missing sanity checks where certain driver/ldisc combinations would oops as they didn't check needed methods were present [akpm@linux-foundation.org: fix fs/compat_ioctl.c build] [akpm@linux-foundation.org: fix isicom] [akpm@linux-foundation.org: fix arch/ia64/hp/sim/simserial.c build] [akpm@linux-foundation.org: fix kgdb] Signed-off-by: NAlan Cox <alan@redhat.com> Acked-by: NGreg Kroah-Hartman <gregkh@suse.de> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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TIF_RESTORE_SIGMASK no longer needs to be in the _TIF_WORK_* masks. Those low bits are scarce. Renumber TIF_RESTORE_SIGMASK to free one up. Signed-off-by: NRoland McGrath <roland@redhat.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Alex Chiang 提交于
Legacy HP ia64 platforms currently cannot provide /proc/cpuinfo/physical_id due to legacy SAL/PAL implementations. However, that physical topology information can be obtained via ACPI. Provide an interface that gives ACPI one last chance to provide physical_id for these legacy platforms. This logic only comes into play iff: - ACPI actually provides slot information for the CPU - we lack a valid socket_id Otherwise, we don't do anything. Since x86 uses the ACPI processor driver as well, we provide a nop stub function for arch_fix_phys_package_id() in asm-x86/topology.h Signed-off-by: NAlex Chiang <achiang@hp.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Alex Chiang 提交于
Commit 113134fc changed the flow of control when calling PAL_LOGICAL_TO_PHYSICAL and SAL_PHYSICAL_ID_INFO. With the change, if a platform did not implement the latter, a useless printk would appear in the boot log: ia64_sal_pltid failed with -1 So let's check the return code and only printk on a true error, and do not print anything in the unimplemented case. While we're in there, clean up some stylistic issues too. Signed-off-by: NAlex Chiang <achiang@hp.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Dean Nelson 提交于
Enable the uncached allocator to allocate multiple pages of contiguous uncached memory. Signed-off-by: NDean Nelson <dcn@sgi.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Hidetoshi Seto 提交于
If "max_purges" from PAL is 0, it actually means 1. However it was not handled later when a hot-added cpu pass the max_purges from PAL. This makes systems easy to go BUG_ON(). Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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- 29 4月, 2008 6 次提交
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由 Christoph Lameter 提交于
Signed-off-by: NChristoph Lameter <clameter@sgi.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Denis V. Lunev 提交于
Use proc_create()/proc_create_data() to make sure that ->proc_fops and ->data be setup before gluing PDE to main tree. Signed-off-by: NDenis V. Lunev <den@openvz.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Arthur Kepner 提交于
Change all ia64 machvecs to use the new dma_*map*_attrs() interfaces. Implement the old dma_*map_*() interfaces in terms of the corresponding new interfaces. For ia64/sn, make use of one dma attribute, DMA_ATTR_WRITE_BARRIER. Introduce swiotlb_*map*_attrs() functions. Signed-off-by: NArthur Kepner <akepner@sgi.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Jes Sorensen <jes@sgi.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Roland Dreier <rdreier@cisco.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: David Miller <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Grant Grundler <grundler@parisc-linux.org> Cc: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Arthur Kepner 提交于
Introduce new interfaces, dma_*map*_attrs(), for passing architecture-specific attributes when memory is mapped and unmapped for DMA. Give the interfaces default implementations which ignore attributes. Also introduce the dma_{set|get}_attr() interfaces for setting and retrieving individual attributes. Define one attribute, DMA_ATTR_WRITE_BARRIER, in anticipation of its use by ia64/sn. Select whether architectures implement arch-specific versions of the dma_*map*_attrs() interfaces via HAVE_DMA_ATTRS in Kconfig. [markn@au1.ibm.com: dma_{set,get}_attr() have to be static inline] Signed-off-by: NArthur Kepner <akepner@sgi.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Jes Sorensen <jes@sgi.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Roland Dreier <rdreier@cisco.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: David Miller <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Grant Grundler <grundler@parisc-linux.org> Cc: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: NMark Nelson <markn@au1.ibm.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 FUJITA Tomonori 提交于
iommu_is_span_boundary in lib/iommu-helper.c was exported for PARISC IOMMUs (commit 3715863a). SWIOTLB can use it instead of the homegrown function. Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Al Viro 提交于
* EXTRA_CFLAGS do not apply for *.S * don't bother with symlinks to ../lib/mem*.S, just add ../lib/mem*.o to object list Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 28 4月, 2008 1 次提交
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由 Jeremy Fitzhardinge 提交于
All architectures use an effectively identical definition of online_page(), so just make it common code. x86-64, ia64, powerpc and sh are actually identical; x86-32 is slightly different. x86-32's differences arise because it puts its hotplug pages in the highmem zone. We can handle this in the generic code by inspecting the page to see if its in highmem, and update the totalhigh_pages count appropriately. This leaves init_32.c:free_new_highpage with a single caller, so I folded it into add_one_highpage_init. I also removed an incorrect comment referring to the NUMA case; any NUMA details have already been dealt with by the time online_page() is called. [akpm@linux-foundation.org: fix indenting] Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: NDave Hansen <dave@linux.vnet.ibm.com> Reviewed-by: NKAMEZAWA Hiroyuki <kamez.hiroyu@jp.fujitsu.com> Tested-by: NKAMEZAWA Hiroyuki <kamez.hiroyu@jp.fujitsu.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Christoph Lameter <clameter@sgi.com> Acked-by: NIngo Molnar <mingo@elte.hu> Acked-by: NYasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 27 4月, 2008 9 次提交
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由 Marcelo Tosatti 提交于
So userspace can save/restore the mpstate during migration. [avi: export the #define constants describing the value] [christian: add s390 stubs] [avi: ditto for ia64] Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NCarsten Otte <cotte@de.ibm.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
We wish to export it to userspace, so move it into the kvm namespace. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Marcelo Tosatti 提交于
Timers that fire between guest hlt and vcpu_block's add_wait_queue() are ignored, possibly resulting in hangs. Also make sure that atomic_inc and waitqueue_active tests happen in the specified order, otherwise the following race is open: CPU0 CPU1 if (waitqueue_active(wq)) add_wait_queue() if (!atomic_read(pit_timer->pending)) schedule() atomic_inc(pit_timer->pending) Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Xiantao Zhang 提交于
Update the related Makefile and KConfig for kvm build Signed-off-by: NXiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Xiantao Zhang 提交于
Some sal/pal calls would be traped to kvm for virtulization from guest firmware. Signed-off-by: NXiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Xiantao Zhang 提交于
process.c mainly handle interruption injection, and some faults handling. Signed-off-by: NAnthony Xu <anthony.xu@intel.com> Signed-off-by: NXiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Xiantao Zhang 提交于
asm-offsets.c will generate offset values used for assembly code for some fileds of special structures. Signed-off-by: NAnthony Xu <anthony.xu@intel.com> Signed-off-by: NXiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Xiantao Zhang 提交于
optvfault.S Add optimization for some performance-critical virtualization faults. Signed-off-by: NAnthony Xu <anthony.xu@intel.com> Signed-off-by: NXiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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