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2015-01-23KVM: remove unneeded return value of vcpu_postcreateDominik Dingel1-7/+3
The return value of kvm_arch_vcpu_postcreate is not checked in its caller. This is okay, because only x86 provides vcpu_postcreate right now and it could only fail if vcpu_load failed. But that is not possible during KVM_CREATE_VCPU (kvm_arch_vcpu_load is void, too), so just get rid of the unchecked return value. Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-01-08kvm: x86: Remove kvm_make_request from lapic.cNicholas Krause3-6/+11
Adds a function kvm_vcpu_set_pending_timer instead of calling kvm_make_request in lapic.c. Signed-off-by: Nicholas Krause <xerofoify@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: Access to LDT/GDT that wraparound is incorrectNadav Amit1-13/+34
When access to descriptor in LDT/GDT wraparound outside long-mode, the address of the descriptor should be truncated to 32-bit. Citing Intel SDM 2.1.1.1 "Global and Local Descriptor Tables in IA-32e Mode": "GDTR and LDTR registers are expanded to 64-bits wide in both IA-32e sub-modes (64-bit mode and compatibility mode)." So in other cases, we need to truncate. Creating new function to return a pointer to descriptor table to avoid too much code duplication. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> [Wrap 64-bit check with #ifdef CONFIG_X86_64, to avoid a "right shift count >= width of type" warning and consequent undefined behavior. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: Do not set access bit on accessed segmentsNadav Amit1-4/+7
When segment is loaded, the segment access bit is set unconditionally. In fact, it should be set conditionally, based on whether the segment had the accessed bit set before. In addition, it can improve performance. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: POP [ESP] is not emulated correctlyNadav Amit1-1/+6
According to Intel SDM: "If the ESP register is used as a base register for addressing a destination operand in memory, the POP instruction computes the effective address of the operand after it increments the ESP register." The current emulation does not behave so. The fix required to waste another of the precious instruction flags and to check the flag in decode_modrm. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: em_call_far should return failure resultNadav Amit1-1/+1
Currently, if em_call_far fails it returns success instead of the resulting error-code. Fix it. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: JMP/CALL using call- or task-gate causes exceptionNadav Amit1-20/+34
The KVM emulator does not emulate JMP and CALL that target a call gate or a task gate. This patch does not try to implement these scenario as they are presumably rare; yet it returns X86EMUL_UNHANDLEABLE error in such cases instead of generating an exception. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: fnstcw and fnstsw may cause spurious exceptionNadav Amit1-6/+3
Since the operand size of fnstcw and fnstsw is updated during the execution, the emulation may cause spurious exceptions as it reads the memory beforehand. Marking these instructions as Mov (since the previous value is ignored) and DstMem16 to simplify the setting of operand size. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: pop sreg accesses only 2 bytesNadav Amit1-1/+3
Although pop sreg updates RSP according to the operand size, only 2 bytes are read. The current behavior may result in incorrect #GP or #PF exceptions. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: mmu: replace assertions with MMU_WARN_ON, a conditional WARN_ONPaolo Bonzini1-28/+14
This makes the direction of the conditions consistent with code that is already using WARN_ON. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: mmu: remove ASSERT(vcpu)Paolo Bonzini1-13/+0
Because ASSERT is just a printk, these would oops right away. The assertion thus hardly adds anything. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: mmu: remove argument to kvm_init_shadow_mmu and ↵Paolo Bonzini4-22/+26
kvm_init_shadow_ept_mmu The initialization function in mmu.c can always use walk_mmu, which is known to be vcpu->arch.mmu. Only init_kvm_nested_mmu is used to initialize vcpu->arch.nested_mmu. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: mmu: do not use return to tail-call functions that return voidPaolo Bonzini1-3/+3
This is, pedantically, not valid C. It also looks weird. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: add tracepoint to wait_lapic_expireMarcelo Tosatti2-0/+21
Add tracepoint to wait_lapic_expire. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> [Remind reader if early or late. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: add option to advance tscdeadline hrtimer expirationMarcelo Tosatti4-1/+66
For the hrtimer which emulates the tscdeadline timer in the guest, add an option to advance expiration, and busy spin on VM-entry waiting for the actual expiration time to elapse. This allows achieving low latencies in cyclictest (or any scenario which requires strict timing regarding timer expiration). Reduces average cyclictest latency from 12us to 8us on Core i5 desktop. Note: this option requires tuning to find the appropriate value for a particular hardware/guest combination. One method is to measure the average delay between apic_timer_fn and VM-entry. Another method is to start with 1000ns, and increase the value in say 500ns increments until avg cyclictest numbers stop decreasing. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: add method to test PIR bitmap vectorMarcelo Tosatti2-0/+15
kvm_x86_ops->test_posted_interrupt() returns true/false depending whether 'vector' is set. Next patch makes use of this interface. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08kvm: x86: vmx: NULL out hwapic_isr_update() in case of !enable_apicvTiejun Chen2-6/+6
In most cases calling hwapic_isr_update(), we always check if kvm_apic_vid_enabled() == 1, but actually, kvm_apic_vid_enabled() -> kvm_x86_ops->vm_has_apicv() -> vmx_vm_has_apicv() or '0' in svm case -> return enable_apicv && irqchip_in_kernel(kvm) So its a little cost to recall vmx_vm_has_apicv() inside hwapic_isr_update(), here just NULL out hwapic_isr_update() in case of !enable_apicv inside hardware_setup() then make all related stuffs follow this. Note we don't check this under that condition of irqchip_in_kernel() since we should make sure definitely any caller don't work without in-kernel irqchip. Signed-off-by: Tiejun Chen <tiejun.chen@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: x86: Remove FIXMEs in emulate.c for the function,task_switch_32Nicholas Krause1-4/+0
Remove FIXME comments about needing fault addresses to be returned. These are propaagated from walk_addr_generic to gva_to_gpa and from there to ops->read_std and ops->write_std. Signed-off-by: Nicholas Krause <xerofoify@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: nVMX: consult PFEC_MASK and PFEC_MATCH when generating #PF VM-exitEugene Korenevsky1-2/+13
When generating #PF VM-exit, check equality: (PFEC & PFEC_MASK) == PFEC_MATCH If there is equality, the 14 bit of exception bitmap is used to take decision about generating #PF VM-exit. If there is inequality, inverted 14 bit is used. Signed-off-by: Eugene Korenevsky <ekorenevsky@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: nVMX: Improve nested msr switch checkingEugene Korenevsky2-14/+117
This patch improve checks required by Intel Software Developer Manual. - SMM MSRs are not allowed. - microcode MSRs are not allowed. - check x2apic MSRs only when LAPIC is in x2apic mode. - MSR switch areas must be aligned to 16 bytes. - address of first and last byte in MSR switch areas should not set any bits beyond the processor's physical-address width. Also it adds warning messages on failures during MSR switch. These messages are useful for people who debug their VMMs in nVMX. Signed-off-by: Eugene Korenevsky <ekorenevsky@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-08KVM: nVMX: Add nested msr load/restore algorithmWincy Van3-11/+96
Several hypervisors need MSR auto load/restore feature. We read MSRs from VM-entry MSR load area which specified by L1, and load them via kvm_set_msr in the nested entry. When nested exit occurs, we get MSRs via kvm_get_msr, writing them to L1`s MSR store area. After this, we read MSRs from VM-exit MSR load area, and load them via kvm_set_msr. Signed-off-by: Wincy Van <fanwenyi0529@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-04x86, um: actually mark system call tables readonlyDaniel Borkmann2-2/+2
Commit a074335a370e ("x86, um: Mark system call tables readonly") was supposed to mark the sys_call_table in UML as RO by adding the const, but it doesn't have the desired effect as it's nevertheless being placed into the data section since __cacheline_aligned enforces sys_call_table being placed into .data..cacheline_aligned instead. We need to use the ____cacheline_aligned version instead to fix this issue. Before: $ nm -v arch/x86/um/sys_call_table_64.o | grep -1 "sys_call_table" U sys_writev 0000000000000000 D sys_call_table 0000000000000000 D syscall_table_size After: $ nm -v arch/x86/um/sys_call_table_64.o | grep -1 "sys_call_table" U sys_writev 0000000000000000 R sys_call_table 0000000000000000 D syscall_table_size Fixes: a074335a370e ("x86, um: Mark system call tables readonly") Cc: H. Peter Anvin <hpa@zytor.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2014-12-27kvm: x86: drop severity of "generation wraparound" messagePaolo Bonzini1-1/+1
Since most virtual machines raise this message once, it is a bit annoying. Make it KERN_DEBUG severity. Cc: stable@vger.kernel.org Fixes: 7a2e8aaf0f6873b47bc2347f216ea5b0e4c258ab Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-27kvm: x86: vmx: reorder some msr writingTiejun Chen1-44/+44
The commit 34a1cd60d17f, "x86: vmx: move some vmx setting from vmx_init() to hardware_setup()", tried to refactor some codes specific to vmx hardware setting into hardware_setup(), but some msr writing should depend on our previous setting condition like enable_apicv, enable_ept and so on. Reported-by: Jamie Heilman <jamie@audible.transient.net> Tested-by: Jamie Heilman <jamie@audible.transient.net> Signed-off-by: Tiejun Chen <tiejun.chen@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-20Merge tag 'for-linus' of ↵Linus Torvalds2-5/+5
git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux Pull ACCESS_ONCE cleanup preparation from Christian Borntraeger: "kernel: Provide READ_ONCE and ASSIGN_ONCE As discussed on LKML http://marc.info/?i=54611D86.4040306%40de.ibm.com ACCESS_ONCE might fail with specific compilers for non-scalar accesses. Here is a set of patches to tackle that problem. The first patch introduce READ_ONCE and ASSIGN_ONCE. If the data structure is larger than the machine word size memcpy is used and a warning is emitted. The next patches fix up several in-tree users of ACCESS_ONCE on non-scalar types. This does not yet contain a patch that forces ACCESS_ONCE to work only on scalar types. This is targetted for the next merge window as Linux next already contains new offenders regarding ACCESS_ONCE vs. non-scalar types" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux: s390/kvm: REPLACE barrier fixup with READ_ONCE arm/spinlock: Replace ACCESS_ONCE with READ_ONCE arm64/spinlock: Replace ACCESS_ONCE READ_ONCE mips/gup: Replace ACCESS_ONCE with READ_ONCE x86/gup: Replace ACCESS_ONCE with READ_ONCE x86/spinlock: Replace ACCESS_ONCE with READ_ONCE mm: replace ACCESS_ONCE with READ_ONCE or barriers kernel: Provide READ_ONCE and ASSIGN_ONCE
2014-12-19Merge branch 'x86-apic-for-linus' of ↵Linus Torvalds25-1254/+1573
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 apic updates from Thomas Gleixner: "After stopping the full x86/apic branch, I took some time to go through the first block of patches again, which are mostly cleanups and preparatory work for the irqdomain conversion and ioapic hotplug support. Unfortunaly one of the real problematic commits was right at the beginning, so I rebased this portion of the pending patches without the offenders. It would be great to get this into 3.19. That makes reworking the problematic parts simpler. The usual tip testing did not unearth any issues and it is fully bisectible now. I'm pretty confident that this wont affect the calmness of the xmas season. Changes: - Split the convoluted io_apic.c code into domain specific parts (vector, ioapic, msi, htirq) - Introduce proper helper functions to retrieve irq specific data instead of open coded dereferencing of pointers - Preparatory work for ioapic hotplug and irqdomain conversion - Removal of the non functional pci-ioapic driver - Removal of unused irq entry stubs - Make native_smp_prepare_cpus() preemtible to avoid GFP_ATOMIC allocations for everything which is called from there. - Small cleanups and fixes" * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits) iommu/amd: Use helpers to access irq_cfg data structure associated with IRQ iommu/vt-d: Use helpers to access irq_cfg data structure associated with IRQ x86: irq_remapping: Use helpers to access irq_cfg data structure associated with IRQ x86, irq: Use helpers to access irq_cfg data structure associated with IRQ x86, irq: Make MSI and HT_IRQ indepenent of X86_IO_APIC x86, irq: Move IRQ initialization routines from io_apic.c into vector.c x86, irq: Move IOAPIC related declarations from hw_irq.h into io_apic.h x86, irq: Move HT IRQ related code from io_apic.c into htirq.c x86, irq: Move PCI MSI related code from io_apic.c into msi.c x86, irq: Replace printk(KERN_LVL) with pr_lvl() utilities x86, irq: Make UP version of irq_complete_move() an inline stub x86, irq: Move local APIC related code from io_apic.c into vector.c x86, irq: Introduce helpers to access struct irq_cfg x86, irq: Protect __clear_irq_vector() with vector_lock x86, irq: Rename local APIC related functions in io_apic.c as apic_xxx() x86, irq: Refine hw_irq.h to prepare for irqdomain support x86, irq: Convert irq_2_pin list to generic list x86, irq: Kill useless parameter 'irq_attr' of IO_APIC_get_PCI_irq_vector() x86, irq, acpi: Get rid of special handling of GSI for ACPI SCI x86, irq: Introduce helper to check whether an IOAPIC has been registered ...
2014-12-19Merge branch 'x86-mpx-for-linus' of ↵Linus Torvalds2-5/+27
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 MPX fixes from Thomas Gleixner: "Three updates for the new MPX infrastructure: - Use the proper error check in the trap handler - Add a proper config option for it - Bring documentation up to date" * 'x86-mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, mpx: Give MPX a real config option prompt x86, mpx: Update documentation x86_64/traps: Fix always true condition
2014-12-19Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds2-6/+7
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fix from Ingo Molnar: "This contains a single TLS ABI validation fix from Andy Lutomirski" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/tls: Don't validate lm in set_thread_area() after all
2014-12-19Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds1-3/+19
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes and cleanups from Ingo Molnar: "A kernel fix plus mostly tooling fixes, but also some tooling restructuring and cleanups" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (39 commits) perf: Fix building warning on ARM 32 perf symbols: Fix use after free in filename__read_build_id perf evlist: Use roundup_pow_of_two tools: Adopt roundup_pow_of_two perf tools: Make the mmap length autotuning more robust tools: Adopt rounddown_pow_of_two and deps tools: Adopt fls_long and deps tools: Move bitops.h from tools/perf/util to tools/ tools: Introduce asm-generic/bitops.h tools lib: Move asm-generic/bitops/find.h code to tools/include and tools/lib tools: Whitespace prep patches for moving bitops.h tools: Move code originally from asm-generic/atomic.h into tools/include/asm-generic/ tools: Move code originally from linux/log2.h to tools/include/linux/ tools: Move __ffs implementation to tools/include/asm-generic/bitops/__ffs.h perf evlist: Do not use hard coded value for a mmap_pages default perf trace: Let the perf_evlist__mmap autosize the number of pages to use perf evlist: Improve the strerror_mmap method perf evlist: Clarify sterror_mmap variable names perf evlist: Fixup brown paper bag on "hint" for --mmap-pages cmdline arg perf trace: Provide a better explanation when mmap fails ...
2014-12-18Merge tag 'pm+acpi-3.19-rc1-2' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more ACPI and power management updates from Rafael Wysocki: "These are regression fixes (leds-gpio, ACPI backlight driver, operating performance points library, ACPI device enumeration messages, cpupower tool), other bug fixes (ACPI EC driver, ACPI device PM), some cleanups in the operating performance points (OPP) framework, continuation of CONFIG_PM_RUNTIME elimination, a couple of minor intel_pstate driver changes, a new MAINTAINERS entry for it and an ACPI fan driver change needed for better support of thermal management in user space. Specifics: - Fix a regression in leds-gpio introduced by a recent commit that inadvertently changed the name of one of the properties used by the driver (Fabio Estevam). - Fix a regression in the ACPI backlight driver introduced by a recent fix that missed one special case that had to be taken into account (Aaron Lu). - Drop the level of some new kernel messages from the ACPI core introduced by a recent commit to KERN_DEBUG which they should have used from the start and drop some other unuseful KERN_ERR messages printed by ACPI (Rafael J Wysocki). - Revert an incorrect commit modifying the cpupower tool (Prarit Bhargava). - Fix two regressions introduced by recent commits in the OPP library and clean up some existing minor issues in that code (Viresh Kumar). - Continue to replace CONFIG_PM_RUNTIME with CONFIG_PM throughout the tree (or drop it where that can be done) in order to make it possible to eliminate CONFIG_PM_RUNTIME (Rafael J Wysocki, Ulf Hansson, Ludovic Desroches). There will be one more "CONFIG_PM_RUNTIME removal" batch after this one, because some new uses of it have been introduced during the current merge window, but that should be sufficient to finally get rid of it. - Make the ACPI EC driver more robust against race conditions related to GPE handler installation failures (Lv Zheng). - Prevent the ACPI device PM core code from attempting to disable GPEs that it has not enabled which confuses ACPICA and makes it report errors unnecessarily (Rafael J Wysocki). - Add a "force" command line switch to the intel_pstate driver to make it possible to override the blacklisting of some systems in that driver if needed (Ethan Zhao). - Improve intel_pstate code documentation and add a MAINTAINERS entry for it (Kristen Carlson Accardi). - Make the ACPI fan driver create cooling device interfaces witn names that reflect the IDs of the ACPI device objects they are associated with, except for "generic" ACPI fans (PNP ID "PNP0C0B"). That's necessary for user space thermal management tools to be able to connect the fans with the parts of the system they are supposed to be cooling properly. From Srinivas Pandruvada" * tag 'pm+acpi-3.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits) MAINTAINERS: add entry for intel_pstate ACPI / video: update the skip case for acpi_video_device_in_dod() power / PM: Eliminate CONFIG_PM_RUNTIME NFC / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM SCSI / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM ACPI / EC: Fix unexpected ec_remove_handlers() invocations Revert "tools: cpupower: fix return checks for sysfs_get_idlestate_count()" tracing / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM x86 / PM: Replace CONFIG_PM_RUNTIME in io_apic.c PM: Remove the SET_PM_RUNTIME_PM_OPS() macro mmc: atmel-mci: use SET_RUNTIME_PM_OPS() macro PM / Kconfig: Replace PM_RUNTIME with PM in dependencies ARM / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM sound / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM phy / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM video / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM tty / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM ACPI / PM: Do not disable wakeup GPEs that have not been enabled ACPI / utils: Drop error messages from acpi_evaluate_reference() ...
2014-12-18Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds24-641/+3600
Pull KVM update from Paolo Bonzini: "3.19 changes for KVM: - spring cleaning: removed support for IA64, and for hardware- assisted virtualization on the PPC970 - ARM, PPC, s390 all had only small fixes For x86: - small performance improvements (though only on weird guests) - usual round of hardware-compliancy fixes from Nadav - APICv fixes - XSAVES support for hosts and guests. XSAVES hosts were broken because the (non-KVM) XSAVES patches inadvertently changed the KVM userspace ABI whenever XSAVES was enabled; hence, this part is going to stable. Guest support is just a matter of exposing the feature and CPUID leaves support" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (179 commits) KVM: move APIC types to arch/x86/ KVM: PPC: Book3S: Enable in-kernel XICS emulation by default KVM: PPC: Book3S HV: Improve H_CONFER implementation KVM: PPC: Book3S HV: Fix endianness of instruction obtained from HEIR register KVM: PPC: Book3S HV: Remove code for PPC970 processors KVM: PPC: Book3S HV: Tracepoints for KVM HV guest interactions KVM: PPC: Book3S HV: Simplify locking around stolen time calculations arch: powerpc: kvm: book3s_paired_singles.c: Remove unused function arch: powerpc: kvm: book3s_pr.c: Remove unused function arch: powerpc: kvm: book3s.c: Remove some unused functions arch: powerpc: kvm: book3s_32_mmu.c: Remove unused function KVM: PPC: Book3S HV: Check wait conditions before sleeping in kvmppc_vcore_blocked KVM: PPC: Book3S HV: ptes are big endian KVM: PPC: Book3S HV: Fix inaccuracies in ICP emulation for H_IPI KVM: PPC: Book3S HV: Fix KSM memory corruption KVM: PPC: Book3S HV: Fix an issue where guest is paused on receiving HMI KVM: PPC: Book3S HV: Fix computation of tlbie operand KVM: PPC: Book3S HV: Add missing HPTE unlock KVM: PPC: BookE: Improve irq inject tracepoint arm/arm64: KVM: Require in-kernel vgic for the arch timers ...
2014-12-18x86/tls: Don't validate lm in set_thread_area() after allAndy Lutomirski2-6/+7
It turns out that there's a lurking ABI issue. GCC, when compiling this in a 32-bit program: struct user_desc desc = { .entry_number = idx, .base_addr = base, .limit = 0xfffff, .seg_32bit = 1, .contents = 0, /* Data, grow-up */ .read_exec_only = 0, .limit_in_pages = 1, .seg_not_present = 0, .useable = 0, }; will leave .lm uninitialized. This means that anything in the kernel that reads user_desc.lm for 32-bit tasks is unreliable. Revert the .lm check in set_thread_area(). The value never did anything in the first place. Fixes: 0e58af4e1d21 ("x86/tls: Disallow unusual TLS segments") Signed-off-by: Andy Lutomirski <luto@amacapital.net> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org # Only if 0e58af4e1d21 is backported Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/d7875b60e28c512f6a6fc0baf5714d58e7eaadbb.1418856405.git.luto@amacapital.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-12-18x86/gup: Replace ACCESS_ONCE with READ_ONCEChristian Borntraeger1-1/+1
ACCESS_ONCE does not work reliably on non-scalar types. For example gcc 4.6 and 4.7 might remove the volatile tag for such accesses during the SRA (scalar replacement of aggregates) step (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145) Change the gup code to replace ACCESS_ONCE with READ_ONCE. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2014-12-18x86/spinlock: Replace ACCESS_ONCE with READ_ONCEChristian Borntraeger1-4/+4
ACCESS_ONCE does not work reliably on non-scalar types. For example gcc 4.6 and 4.7 might remove the volatile tag for such accesses during the SRA (scalar replacement of aggregates) step (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145) Change the spinlock code to replace ACCESS_ONCE with READ_ONCE. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2014-12-18KVM: move APIC types to arch/x86/Paolo Bonzini2-0/+27
They are not used anymore by IA64, move them away. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-17x86: mm: fix VM_FAULT_RETRY handlingLinus Torvalds1-1/+1
My commit 26178ec11ef3 ("x86: mm: consolidate VM_FAULT_RETRY handling") had a really stupid typo: the FAULT_FLAG_USER bit is in the 'flags' variable, not the 'fault' variable. Duh, The one silver lining in this is that Dave finding this at least confirms that trinity actually triggers this special path easily, in a way normal use does not. Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-12-16Merge tag 'stable/for-linus-3.19-rc0b-tag' of ↵Linus Torvalds7-965/+779
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull additional xen update from David Vrabel: "Xen: additional features for 3.19-rc0 - Linear p2m for x86 PV guests which simplifies the p2m code, improves performance and will allow for > 512 GB PV guests in the future. A last-minute, configuration specific issue was discovered with this change which is why it was not included in my previous pull request. This is now been fixed and tested" * tag 'stable/for-linus-3.19-rc0b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen: switch to post-init routines in xen mmu.c earlier Revert "swiotlb-xen: pass dev_addr to swiotlb_tbl_unmap_single" xen: annotate xen_set_identity_and_remap_chunk() with __init xen: introduce helper functions to do safe read and write accesses xen: Speed up set_phys_to_machine() by using read-only mappings xen: switch to linear virtual mapped sparse p2m list xen: Hide get_phys_to_machine() to be able to tune common path x86: Introduce function to get pmd entry pointer xen: Delay invalidating extra memory xen: Delay m2p_override initialization xen: Delay remapping memory of pv-domain xen: use common page allocation function in p2m.c xen: Make functions static xen: fix some style issues in p2m.c
2014-12-16x86, irq: Use helpers to access irq_cfg data structure associated with IRQJiang Liu5-14/+14
Use helpers to access irq_cfg data structure associated with IRQ, instead of accessing irq_data->chip_data directly. Later we can rewrite those helpers to support hierarchy irqdomain. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Grant Likely <grant.likely@linaro.org> Cc: Prarit Bhargava <prarit@redhat.com> Link: http://lkml.kernel.org/r/1414397531-28254-17-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-12-16x86, irq: Make MSI and HT_IRQ indepenent of X86_IO_APICJiang Liu1-2/+2
Now we have splitted functions to support MSI and HT_IRQ into vector.c, and they have no dependency on IOAPIC any more. So change Kconfig files to make MSI and HT_IRQ independent of X86_IO_APIC. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Link: http://lkml.kernel.org/r/1414397531-28254-16-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-12-16x86, irq: Move IRQ initialization routines from io_apic.c into vector.cJiang Liu3-21/+31
Move IRQ initialization routines from io_apic.c into vector.c, preparing for enabling hierarchy irqdomain. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Grant Likely <grant.likely@linaro.org> Cc: Prarit Bhargava <prarit@redhat.com> Link: http://lkml.kernel.org/r/1414397531-28254-15-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-12-16x86, irq: Move IOAPIC related declarations from hw_irq.h into io_apic.hJiang Liu7-34/+33
Clean up code by moving IOAPIC related declarations from hw_irq.h into io_apic.h. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: H. Peter Anvin <hpa@linux.intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Matt Fleming <matt.fleming@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Christian Gmeiner <christian.gmeiner@gmail.com> Cc: Aubrey <aubrey.li@linux.intel.com> Cc: Ryan Desfosses <ryan@desfo.org> Cc: Quentin Lambert <lambert.quentin@gmail.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Link: http://lkml.kernel.org/r/1414397531-28254-14-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-12-16x86, irq: Move HT IRQ related code from io_apic.c into htirq.cJiang Liu3-92/+108
Create arch/x86/kernel/apic/htirq.c to host Hypertransport IRQ related code, preparing for enabling hierarchy irqdomain. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Grant Likely <grant.likely@linaro.org> Cc: Prarit Bhargava <prarit@redhat.com> Link: http://lkml.kernel.org/r/1414397531-28254-13-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-12-16x86, irq: Move PCI MSI related code from io_apic.c into msi.cJiang Liu5-276/+290
Create arch/x86/kernel/apic/msi.c to host MSI related code, preparing for enabling hierarchy irqdomain. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Prarit Bhargava <prarit@redhat.com> Link: http://lkml.kernel.org/r/1414397531-28254-12-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-12-16x86, irq: Replace printk(KERN_LVL) with pr_lvl() utilitiesJiang Liu1-35/+34
Replace printk(KENR_LVL) with pr_lvl() to keep checkpatch script silent. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Link: http://lkml.kernel.org/r/1414397531-28254-11-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-12-16x86, irq: Make UP version of irq_complete_move() an inline stubThomas Gleixner2-3/+2
No point for having an empty real function. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-12-16x86, irq: Move local APIC related code from io_apic.c into vector.cJiang Liu6-684/+714
Create arch/x86/kernel/apic/vector.c to host local APIC related code, prepare for making MSI/HT_IRQ independent of IOAPIC. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Grant Likely <grant.likely@linaro.org> Link: http://lkml.kernel.org/r/1414397531-28254-10-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-12-16x86, irq: Introduce helpers to access struct irq_cfgJiang Liu2-1/+8
Change irq_cfg() from static to extern, also introduce helper function irqd_cfg(). Later we can rewrite these two helpers when enabling hierarchy irqdomain. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Grant Likely <grant.likely@linaro.org> Link: http://lkml.kernel.org/r/1414397531-28254-9-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-12-16x86, irq: Protect __clear_irq_vector() with vector_lockJiang Liu1-8/+11
Function __clear_irq_vector() accesses vector related data structure, so protect it with vector_lock. Also rename it as clear_irq_vector(). Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Grant Likely <grant.likely@linaro.org> Cc: Prarit Bhargava <prarit@redhat.com> Link: http://lkml.kernel.org/r/1414397531-28254-8-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-12-16x86, irq: Rename local APIC related functions in io_apic.c as apic_xxx()Jiang Liu3-24/+24
Rename local APIC related functions in io_apic.c as apic_xxx() instead of ioapic_xxx(), later they will be moved into separate file. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Grant Likely <grant.likely@linaro.org> Link: http://lkml.kernel.org/r/1414397531-28254-7-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-12-16x86, irq: Refine hw_irq.h to prepare for irqdomain supportJiang Liu1-43/+51
Refine hw_irq.h to prepare for irqdomain support by: 1) guarding common APIC related interfaces with CONFIG_X86_LOCAL_APIC 2) guarding interrupt remapping related interfaces with CONFIG_IRQ_REMAP 3) guarding IOAPIC related interfaces with CONFIG_X86_IO_APIC No functional changes. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Prarit Bhargava <prarit@redhat.com> Link: http://lkml.kernel.org/r/1414397531-28254-6-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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