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2009-11-10x86: Handle HW IOMMU initialization failure gracefullyFUJITA Tomonori
If HW IOMMU initialization fails (Intel VT-d often does this, typically due to BIOS bugs), we fall back to nommu. It doesn't work for the majority since nowadays we have more than 4GB memory so we must use swiotlb instead of nommu. The problem is that it's too late to initialize swiotlb when HW IOMMU initialization fails. We need to allocate swiotlb memory earlier from bootmem allocator. Chris explained the issue in detail: http://marc.info/?l=linux-kernel&m=125657444317079&w=2 The current x86 IOMMU initialization sequence is too complicated and handling the above issue makes it more hacky. This patch changes x86 IOMMU initialization sequence to handle the above issue cleanly. The new x86 IOMMU initialization sequence are: 1. we initialize the swiotlb (and setting swiotlb to 1) in the case of (max_pfn > MAX_DMA32_PFN && !no_iommu). dma_ops is set to swiotlb_dma_ops or nommu_dma_ops. if swiotlb usage is forced by the boot option, we finish here. 2. we call the detection functions of all the IOMMUs 3. the detection function sets x86_init.iommu.iommu_init to the IOMMU initialization function (so we can avoid calling the initialization functions of all the IOMMUs needlessly). 4. if the IOMMU initialization function doesn't need to swiotlb then sets swiotlb to zero (e.g. the initialization is sucessful). 5. if we find that swiotlb is set to zero, we free swiotlb resource. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: chrisw@sous-sol.org Cc: dwmw2@infradead.org Cc: joerg.roedel@amd.com Cc: muli@il.ibm.com LKML-Reference: <1257849980-22640-10-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-10swiotlb: Defer swiotlb init printing, export swiotlb_print_info()FUJITA Tomonori
This enables us to avoid printing swiotlb memory info when we initialize swiotlb. After swiotlb initialization, we could find that we don't need swiotlb. This patch removes the code to print swiotlb memory info in swiotlb_init() and exports the function to do that. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: chrisw@sous-sol.org Cc: dwmw2@infradead.org Cc: joerg.roedel@amd.com Cc: muli@il.ibm.com Cc: tony.luck@intel.com Cc: benh@kernel.crashing.org LKML-Reference: <1257849980-22640-9-git-send-email-fujita.tomonori@lab.ntt.co.jp> [ -v2: merge up conflict ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-10x86: intel-iommu: Convert detect_intel_iommu to use iommu_init hookFUJITA Tomonori
This changes detect_intel_iommu() to set intel_iommu_init() to iommu_init hook if detect_intel_iommu() finds the IOMMU. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: chrisw@sous-sol.org Cc: dwmw2@infradead.org Cc: joerg.roedel@amd.com Cc: muli@il.ibm.com LKML-Reference: <1257849980-22640-6-git-send-email-fujita.tomonori@lab.ntt.co.jp> [ -v2: build fix for the !CONFIG_DMAR case ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-10x86: amd_iommu: Convert amd_iommu_detect() to use iommu_init hookFUJITA Tomonori
This changes amd_iommu_detect() to set amd_iommu_init to iommu_init hook if amd_iommu_detect() finds the AMD IOMMU. We can kill the code to check if we found the IOMMU in amd_iommu_init() since amd_iommu_detect() sets amd_iommu_init() only when it found the IOMMU. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: chrisw@sous-sol.org Cc: dwmw2@infradead.org Cc: joerg.roedel@amd.com Cc: muli@il.ibm.com LKML-Reference: <1257849980-22640-5-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-10x86: GART: Convert gart_iommu_hole_init() to use iommu_init hookFUJITA Tomonori
This changes gart_iommu_hole_init() to set gart_iommu_init() to iommu_init hook if gart_iommu_hole_init() finds the GART IOMMU. We can kill the code to check if we found the IOMMU in gart_iommu_init() since gart_iommu_hole_init() sets gart_iommu_init() only when it found the IOMMU. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: chrisw@sous-sol.org Cc: dwmw2@infradead.org Cc: joerg.roedel@amd.com Cc: muli@il.ibm.com LKML-Reference: <1257849980-22640-4-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-10x86: Calgary: Convert detect_calgary() to use iommu_init hookFUJITA Tomonori
This changes detect_calgary() to set init_calgary() to iommu_init hook if detect_calgary() finds the Calgary IOMMU. We can kill the code to check if we found the IOMMU in init_calgary() since detect_calgary() sets init_calgary() only when it found the IOMMU. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Muli Ben-Yehuda <muli@il.ibm.com> Cc: chrisw@sous-sol.org Cc: dwmw2@infradead.org Cc: joerg.roedel@amd.com LKML-Reference: <1257849980-22640-3-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-10x86: Add iommu_init to x86_init_opsFUJITA Tomonori
We call the detections functions of all the IOMMUs then all their initialization functions. The latter is pointless since we don't detect multiple different IOMMUs. What we need to do is calling the initialization function of the detected IOMMU. This adds iommu_init hook to x86_init_ops so if an IOMMU detection function can set its initialization function to the hook. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: chrisw@sous-sol.org Cc: dwmw2@infradead.org Cc: joerg.roedel@amd.com Cc: muli@il.ibm.com LKML-Reference: <1257849980-22640-2-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-10x86: GART: pci-gart_64.c: Use correct length in strncmpJoe Perches
Signed-off-by: Joe Perches <joe@perches.com> Cc: <stable@kernel.org> # .3x.x LKML-Reference: <1257818330.12852.72.camel@Joe-Laptop.home> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-08x86: Fix iommu=nodac parameter handlingTejun Heo
iommu=nodac should forbid dac instead of enabling it. Fix it. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Matteo Frigo <athena@fftw.org> Cc: <stable@kernel.org> # .32.x and older LKML-Reference: <4AE5B52A.4050408@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-08x86: Use x86_platform for iommu_shutdownFUJITA Tomonori
This patch cleans up pci_iommu_shutdown() a bit to use x86_platform (similar to how IA64 initializes an IOMMU driver). This adds iommu_shutdown() to x86_platform to avoid calling every IOMMUs' shutdown functions in pci_iommu_shutdown() in order. The IOMMU shutdown functions are platform specific (we don't have multiple different IOMMU hardware) so the current way is pointless. An IOMMU driver sets x86_platform.iommu_shutdown to the shutdown function if necessary. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: joerg.roedel@amd.com LKML-Reference: <20091027163358F.fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-05Merge branch 'kvm-updates/2.6.32' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
* 'kvm-updates/2.6.32' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: get_tss_base_addr() should return a gpa_t KVM: x86: Catch potential overrun in MCE setup
2009-11-05x86: Make sure get_user_desc() doesn't sign extend.Chris Lalancette
The current implementation of get_user_desc() sign extends the return value because of integer promotion rules. For the most part, this doesn't matter, because the top bit of base2 is usually 0. If, however, that bit is 1, then the entire value will be 0xffff... which is probably not what the caller intended. This patch casts the entire thing to unsigned before returning, which generates almost the same assembly as the current code but replaces the final "cltq" (sign extend) with a "mov %eax %eax" (zero-extend). This fixes booting certain guests under KVM. Signed-off-by: Chris Lalancette <clalance@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-11-05Merge branch 'bugfix' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen * 'bugfix' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen: xen: mask extended topology info in cpuid xen/hvc: make sure console output is always emitted, with explicit polling
2009-11-05Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Fix kthread_bind() by moving the body of kthread_bind() to sched.c sched: Disable SD_PREFER_LOCAL at node level sched: Fix boot crash by zalloc()ing most of the cpu masks sched: Strengthen buddies and mitigate buddy induced latencies
2009-11-05Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, fs: Fix x86 procfs stack information for threads on 64-bit x86: Add reboot quirk for 3 series Mac mini x86: Fix printk message typo in mtrr cleanup code dma-debug: Fix compile warning with PAE enabled x86/amd-iommu: Un__init function required on shutdown x86/amd-iommu: Workaround for erratum 63
2009-11-04KVM: get_tss_base_addr() should return a gpa_tGleb Natapov
If TSS we are switching to resides in high memory task switch will fail since address will be truncated. Windows2k3 does this sometimes when running with more then 4G Cc: stable@kernel.org Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-11-04KVM: x86: Catch potential overrun in MCE setupJan Kiszka
We only allocate memory for 32 MCE banks (KVM_MAX_MCE_BANKS) but we allow user space to fill up to 255 on setup (mcg_cap & 0xff), corrupting kernel memory. Catch these overflows. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-11-04x86, fs: Fix x86 procfs stack information for threads on 64-bitStefani Seibold
This patch fixes two issues in the procfs stack information on x86-64 linux. The 32 bit loader compat_do_execve did not store stack start. (this was figured out by Alexey Dobriyan). The stack information on a x64_64 kernel always shows 0 kbyte stack usage, because of a missing implementation of the KSTK_ESP macro which always returned -1. The new implementation now returns the right value. Signed-off-by: Stefani Seibold <stefani@seibold.net> Cc: Americo Wang <xiyou.wangcong@gmail.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <1257240160.4889.24.camel@wall-e> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-03xen: mask extended topology info in cpuidJeremy Fitzhardinge
A Xen guest never needs to know about extended topology, and knowing would just confuse it. This patch just zeros ebx in leaf 0xb which indicates no topology info, preventing a crash under Xen on cpus which support this leaf. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Stable Kernel <stable@kernel.org>
2009-11-03Merge branch 'iommu/fixes' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into x86/urgent
2009-11-03Merge branches 'amd-iommu/fixes' and 'dma-debug/fixes' into iommu/fixesJoerg Roedel
2009-11-03sched: Disable SD_PREFER_LOCAL at node levelMike Galbraith
Yanmin Zhang reported that SD_PREFER_LOCAL induces an order of magnitude increase in select_task_rq_fair() overhead while running heavy wakeup benchmarks (tbench and vmark). Since SD_BALANCE_WAKE is off at node level, turn SD_PREFER_LOCAL off as well pending further investigation. Reported-by: Zhang, Yanmin <yanmin_zhang@linux.intel.com> Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-02Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Make EFI RTC function depend on 32bit again x86-64: Fix register leak in 32-bit syscall audting x86: crash_dump: Fix non-pae kdump kernel memory accesses x86: Side-step lguest problem by only building cmpxchg8b_emu for pre-Pentium x86: Remove STACKPROTECTOR_ALL
2009-11-02x86: Add reboot quirk for 3 series Mac miniGottfried Haider
Reboot does not work out of the box on my "Early 2009" Mac mini (3,1). Detect this machine via DMI as we do for recent MacBooks. Signed-off-by: Gottfried Haider <gottfried.haider@gmail.com> Cc: Ozan Çağlayan <ozan@pardus.org.tr> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-11-02x86: Fix printk message typo in mtrr cleanup codeDave Jones
Trivial typo. Signed-off-by: Dave Jones <davej@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-29Merge branch 'bugfix' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen * 'bugfix' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen: xen: set up mmu_ops before trying to set any ptes
2009-10-29Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Do less agressive buddy clearing sched: Disable SD_PREFER_LOCAL for MC/CPU domains
2009-10-29Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, UV: Set DELIVERY_MODE=4 for vector=NMI_VECTOR in uv_hub_send_ipi() x86, UV: Fix and clean up bau code to use uv_gpa_to_pnode() x86: Don't print number of MCE banks for every CPU x86, UV: Fix information in __uv_hub_info structure x86: Document linker script ASSERT() quirk
2009-10-28x86/amd-iommu: Un__init function required on shutdownJoerg Roedel
The function iommu_feature_disable is required on system shutdown to disable the IOMMU but it is marked as __init. This may result in a panic if the memory is reused. This patch fixes this bug. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-10-27xen: set up mmu_ops before trying to set any ptesJeremy Fitzhardinge
xen_setup_stackprotector() ends up trying to set page protections, so we need to have vm_mmu_ops set up before trying to do so. Failing to do so causes an early boot crash. [ Impact: Fix early crash under Xen. ] Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2009-10-27x86: Make EFI RTC function depend on 32bit againFeng Tang
The EFI RTC functions are only available on 32 bit. commit 7bd867df (x86: Move get/set_wallclock to x86_platform_ops) removed the 32bit dependency which leads to boot crashes on 64bit EFI systems. Add the dependency back. Solves: http://bugzilla.kernel.org/show_bug.cgi?id=14466 Tested-by: Matthew Garrett <mjg59@srcf.ucam.org> Signed-off-by: Feng Tang <feng.tang@intel.com> LKML-Reference: <20091020125402.028d66d5@feng-desktop> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2009-10-26x86-64: Fix register leak in 32-bit syscall audtingJan Beulich
Restoring %ebp after the call to audit_syscall_exit() is not only unnecessary (because the register didn't get clobbered), but in the sysenter case wasn't even doing the right thing: It loaded %ebp from a location below the top of stack (RBP < ARGOFFSET), i.e. arbitrary kernel data got passed back to user mode in the register. Signed-off-by: Jan Beulich <jbeulich@novell.com> Acked-by: Roland McGrath <roland@redhat.com> Cc: <stable@kernel.org> LKML-Reference: <4AE5CC4D020000780001BD13@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-26x86: crash_dump: Fix non-pae kdump kernel memory accessesJiri Slaby
Non-PAE 32-bit dump kernels may wrap an address around 4G and poke unwanted space. ptes there are 32-bit long, and since pfn << PAGE_SIZE may exceed this limit, high pfn bits are cropped and wrong address mapped by kmap_atomic_pfn in copy_oldmem_page. Don't allow this behavior in non-PAE kdump kernels by checking pfns passed into copy_oldmem_page. In the case of failure, userspace process gets EFAULT. [v2] - fix comments - move ifdefs inside the function Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Simon Horman <horms@verge.net.au> Cc: Paul Mundt <lethal@linux-sh.org> LKML-Reference: <1256551903-30567-1-git-send-email-jirislaby@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-26x86: Side-step lguest problem by only building cmpxchg8b_emu for pre-PentiumRusty Russell
Commit 79e1dd05d1a22 "x86: Provide an alternative() based cmpxchg64()" broke lguest, even on systems which have cmpxchg8b support. The emulation code gets used until alternatives get run, but it contains native instructions, not their paravirt alternatives. The simplest fix is to turn this code off except for 386 and 486 builds. Reported-by: Johannes Stezenbach <js@sig21.net> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: H. Peter Anvin <hpa@zytor.com> Cc: lguest@ozlabs.org Cc: Arjan van de Ven <arjan@infradead.org> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <200910261426.05769.rusty@rustcorp.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-23x86: Remove STACKPROTECTOR_ALLArjan van de Ven
STACKPROTECTOR_ALL has a really high overhead (runtime and stack footprint) and is not really worth it protection wise (the normal STACKPROTECTOR is in effect for all functions with buffers already), so lets just remove the option entirely. Reported-by: Dave Jones <davej@redhat.com> Reported-by: Chuck Ebbert <cebbert@redhat.com> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Eric Sandeen <sandeen@redhat.com> LKML-Reference: <20091023073101.3dce4ebb@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-22Merge branch 'kvm-updates/2.6.32' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
* 'kvm-updates/2.6.32' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: Prevent kvm_init from corrupting debugfs structures KVM: MMU: fix pointer cast KVM: use proper hrtimer function to retrieve expiration time
2009-10-22Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: aesni-intel - Fix irq_fpu_usable usage crypto: padlock-sha - Fix stack alignment
2009-10-21x86, UV: Set DELIVERY_MODE=4 for vector=NMI_VECTOR in uv_hub_send_ipi()Robin Holt
When sending a NMI_VECTOR IPI using the UV_HUB_IPI_INT register, we need to ensure the delivery mode field of that register has NMI delivery selected. This makes those IPIs true NMIs, instead of flat IPIs. It matters to reboot sequences and KGDB, both of which use NMI IPIs. Signed-off-by: Robin Holt <holt@sgi.com> Acked-by: Jack Steiner <steiner@sgi.com> Cc: Martin Hicks <mort@sgi.com> Cc: <stable@kernel.org> LKML-Reference: <20091020193620.877322000@alcatraz.americas.sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-20crypto: aesni-intel - Fix irq_fpu_usable usageHuang Ying
When renaming kernel_fpu_using to irq_fpu_usable, the semantics of the function is changed too, from mesuring whether kernel is using FPU, that is, the FPU is NOT available, to measuring whether FPU is usable, that is, the FPU is available. But the usage of irq_fpu_usable in aesni-intel_glue.c is not changed accordingly. This patch fixes this. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-10-16KVM: MMU: fix pointer castFrederik Deweerdt
On a 32 bits compile, commit 3da0dd433dc399a8c0124d0614d82a09b6a49bce introduced the following warnings: arch/x86/kvm/mmu.c: In function ‘kvm_set_pte_rmapp’: arch/x86/kvm/mmu.c:770: warning: cast to pointer from integer of different size arch/x86/kvm/mmu.c: In function ‘kvm_set_spte_hva’: arch/x86/kvm/mmu.c:849: warning: cast from pointer to integer of different size The following patch uses 'unsigned long' instead of u64 to match the pointer size on both arches. Signed-off-by: Frederik Deweerdt <frederik.deweerdt@xprog.eu> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-10-16KVM: use proper hrtimer function to retrieve expiration timeMarcelo Tosatti
hrtimer->base can be temporarily NULL due to racing hrtimer_start. See switch_hrtimer_base/lock_hrtimer_base. Use hrtimer_get_remaining which is robust against it. CC: stable@kernel.org Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-10-16x86, UV: Fix and clean up bau code to use uv_gpa_to_pnode()Robin Holt
Create an inline function to extract the pnode from a global physical address and then convert the broadcast assist unit to use the newly created uv_gpa_to_pnode function. The open-coded code was wrong as well - it might explain a few of our unexplained bau hangs. Signed-off-by: Robin Holt <holt@sgi.com> Acked-by: Cliff Whickman <cpw@sgi.com> Cc: linux-mm@kvack.org Cc: Jack Steiner <steiner@sgi.com> LKML-Reference: <20091016112920.GZ8903@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-16x86: Don't print number of MCE banks for every CPURoland Dreier
The MCE initialization code explicitly says it doesn't handle asymmetric configurations where different CPUs support different numbers of MCE banks, and it prints a big warning in that case. Therefore, printing the "mce: CPU supports <x> MCE banks" message into the kernel log for every CPU is pure redundancy that clutters the log significantly for systems with lots of CPUs. Signed-off-by: Roland Dreier <rolandd@cisco.com> LKML-Reference: <adaeip473qt.fsf@cisco.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-16x86, UV: Fix information in __uv_hub_info structureRobin Holt
A few parts of the uv_hub_info structure are initialized incorrectly. - n_val is being loaded with m_val. - gpa_mask is initialized with a bytes instead of an unsigned long. - Handle the case where none of the alias registers are used. Lastly I converted the bau over to using the uv_hub_info->m_val which is the correct value. Without this patch, booting a large configuration hits a problem where the upper bits of the gnode affect the pnode and the bau will not operate. Signed-off-by: Robin Holt <holt@sgi.com> Acked-by: Jack Steiner <steiner@sgi.com> Cc: Cliff Whickman <cpw@sgi.com> Cc: stable@kernel.org LKML-Reference: <20091015224946.396355000@alcatraz.americas.sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-16x86: Document linker script ASSERT() quirkIngo Molnar
Older binutils breaks if ASSERT() is used without a sink for the output. For example 2.14.90.0.6 is known to be broken, the link fails with: LD .tmp_vmlinux1 ld:arch/x86/kernel/vmlinux.lds:678: parse error Document this quirk in all three files that use it. See: http://marc.info/?l=linux-kbuild&m=124930110427870&w=2 See[2]: d2ba8b2 ("x86: Fix assert syntax in vmlinux.lds.S") Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Roland McGrath <roland@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Sam Ravnborg <sam@ravnborg.org> LKML-Reference: <4AD6523D.5030909@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-15Revert "x86: linker script syntax nits"Ingo Molnar
This reverts commit e9a63a4e559fbdc522072281d05e6b13c1022f4b. This breaks older binutils, where sink-less asserts are broken. See this commit for further details: d2ba8b2: x86: Fix assert syntax in vmlinux.lds.S Acked-by: "H. Peter Anvin" <hpa@zytor.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <4AD6523D.5030909@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-15Merge branch 'linus' into x86/urgentIngo Molnar
Merge reason: pull in latest, to be able to revert a patch there. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-14Merge branch 'topic/x86-lds-nits' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland * 'topic/x86-lds-nits' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland: x86: linker script syntax nits
2009-10-14Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Fix missing kernel-doc notation Revert "x86, timers: Check for pending timers after (device) interrupts" sched: Update the clock of runqueue select_task_rq() selected
2009-10-14Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86/paravirt: Use normal calling sequences for irq enable/disable x86: fix kernel panic on 32 bits when profiling x86: Fix Suspend to RAM freeze on Acer Aspire 1511Lmi laptop x86, vmi: Mark VMI deprecated and schedule it for removal
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