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2008-10-15x86: KVM guest: use paravirt function to calculate cpu khzGlauber Costa
We're currently facing timing problems in guests that do calibration under heavy load, and then the load vanishes. This means we'll have a much lower lpj than we actually should, and delays end up taking less time than they should, which is a nasty bug. Solution is to pass on the lpj value from host to guest, and have it preset. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15x86: paravirt: factor out cpu_khz to common codeGlauber Costa
KVM intends to use paravirt code to calibrate khz. Xen current code will do just fine. So as a first step, factor out code to pvclock.c. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: PIT: fix injection logic and countMarcelo Tosatti
The PIT injection logic is problematic under the following cases: 1) If there is a higher priority vector to be delivered by the time kvm_pit_timer_intr_post is invoked ps->inject_pending won't be set. This opens the possibility for missing many PIT event injections (say if guest executes hlt at this point). 2) ps->inject_pending is racy with more than two vcpus. Since there's no locking around read/dec of pt->pending, two vcpu's can inject two interrupts for a single pt->pending count. Fix 1 by using an irq ack notifier: only reinject when the previous irq has been acked. Fix 2 with appropriate locking around manipulation of pending count and irq_ack by the injection / ack paths. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: irq ack notificationMarcelo Tosatti
Based on a patch from: Ben-Ami Yassour <benami@il.ibm.com> which was based on a patch from: Amit Shah <amit.shah@qumranet.com> Notify IRQ acking on PIC/APIC emulation. The previous patch missed two things: - Edge triggered interrupts on IOAPIC - PIC reset with IRR/ISR set should be equivalent to ack (LAPIC probably needs something similar). Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> CC: Amit Shah <amit.shah@qumranet.com> CC: Ben-Ami Yassour <benami@il.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Add irq ack notifier listAvi Kivity
This can be used by kvm subsystems that are interested in when interrupts are acked, for example time drift compensation. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Ignore DEBUGCTL MSRs with no effectAlexander Graf
Netware writes to DEBUGCTL and reads from the DEBUGCTL and LAST*IP MSRs without further checks and is really confused to receive a #GP during that. To make it happy we should just make them stubs, which is exactly what SVM already does. Writes to DEBUGCTL that are vendor-specific are resembled to behave as if the virtual CPU does not know them. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Avoid vmwrite(HOST_RSP) when possibleAvi Kivity
Usually HOST_RSP retains its value across guest entries. Take advantage of this and avoid a vmwrite() when this is so. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: SVM: Unify register save/restore across 32 and 64 bit hostsAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Unify register save/restore across 32 and 64 bit hostsAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Reinject real mode exceptionJan Kiszka
As we execute real mode guests in VM86 mode, exception have to be reinjected appropriately when the guest triggered them. For this purpose the patch adopts the real-mode injection pattern used in vmx_inject_irq to vmx_queue_exception, additionally taking care that the IP is set correctly for #BP exceptions. Furthermore it extends handle_rmode_exception to reinject all those exceptions that can be raised in real mode. This fixes the execution of himem.exe from FreeDOS and also makes its debug.com work properly. Note that guest debugging in real mode is broken now. This has to be fixed by the scheduled debugging infrastructure rework (will be done once base patches for QEMU have been accepted). Signed-off-by: Jan Kiszka <jan.kiszka@web.de> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Consolidate XX_VECTOR definesJan Kiszka
Signed-off-by: Jan Kiszka <jan.kiszka@web.de> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Consolidate PIC isr clearing into a functionAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Remove redundant check in handle_rmode_exceptionMohammed Gamal
Since checking for vcpu->arch.rmode.active is already done whenever we call handle_rmode_exception(), checking it inside the function is redundant. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Move interrupt post-processing to vmx_complete_interrupts()Avi Kivity
Instead of looking at failed injections in the vm entry path, move processing to the exit path in vmx_complete_interrupts(). This simplifes the logic and removes any state that is hidden in vmx registers. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Add a pending interrupt queueAvi Kivity
Similar to the exception queue, this hold interrupts that have been accepted by the virtual processor core but not yet injected. Not yet used. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Fix pending exception processingAvi Kivity
The vmx code assumes that IDT-Vectoring can only be set when an exception is injected due to the exception in question. That's not true, however: if the exception is injected correctly, and later another exception occurs but its delivery is blocked due to a fault, then we will incorrectly assume the first exception was not delivered. Fix by unconditionally dequeuing the pending exception, and requeuing it (or the second exception) if we see it in the IDT-Vectoring field. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Clear exception queue before emulating an instructionAvi Kivity
If we're emulating an instruction, either it will succeed, in which case any previously queued exception will be spurious, or we will requeue the same exception. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Move nmi injection failure processing to vm exit pathAvi Kivity
Instead of processing nmi injection failure in the vm entry path, move it to the vm exit path (vm_complete_interrupts()). This separates nmi injection from nmi post-processing, and moves the nmi state from the VT state into vcpu state (new variable nmi_injected specifying an injection in progress). Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Move NMI IRET fault processing to new vmx_complete_interrupts()Avi Kivity
Currently most interrupt exit processing is handled on the entry path, which is confusing. Move the NMI IRET fault processing to a new function, vmx_complete_interrupts(), which is called on the vmexit path. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: MMU: Simplify kvm_mmu_zap_page()Avi Kivity
The twisty maze of conditionals can be reduced. [joerg: fix tlb flushing] Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: MMU: Separate the code for unlinking a shadow page from its parentsAvi Kivity
Place into own function, in preparation for further cleanups. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: Introduce kvm_set_irq to inject interrupts in guestsAmit Shah
This function injects an interrupt into the guest given the kvm struct, the (guest) irq number and the interrupt level. Signed-off-by: Amit Shah <amit.shah@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: x86: accessors for guest registersMarcelo Tosatti
As suggested by Avi, introduce accessors to read/write guest registers. This simplifies the ->cache_regs/->decache_regs interface, and improves register caching which is important for VMX, where the cost of vmcs_read/vmcs_write is significant. [avi: fix warnings] Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-15KVM: VMX: Rename misnamed msr bitsSheng Yang
MSR_IA32_FEATURE_LOCKED is just a bit in fact, which shouldn't be prefixed with MSR_. So is MSR_IA32_FEATURE_VMXON_ENABLED. Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-10-14x86: register a platform RTC device if PNP doesn't describe itBjorn Helgaas
Most if not all x86 platforms have an RTC device, but sometimes the RTC is not exposed as a PNP0b00/PNP0b01/PNP0b02 device in PNPBIOS or ACPI: http://bugzilla.kernel.org/show_bug.cgi?id=11580 https://bugzilla.redhat.com/show_bug.cgi?id=451188 It's best if we can discover the RTC via PNP because then we know which flavor of device it is, where it lives, and which IRQ it uses. But if we can't, we should register a platform device using the compiled-in RTC_PORT/RTC_IRQ resource assumptions. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Reported-by: Rik Theys <rik.theys@esat.kuleuven.be> Reported-by: shr_msn@yahoo.com.tw Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-13Merge git://git.infradead.org/users/dwmw2/random-2.6Linus Torvalds
* git://git.infradead.org/users/dwmw2/random-2.6: Fix autoloading of MacBook Pro backlight driver. Automatic MODULE_ALIAS() for DMI match tables. Remove asm/a.out.h files for all architectures without a.out support. Introduce HAVE_AOUT symbol to remove hard-coded arch list for BINFMT_AOUT Remove redundant CONFIG_ARCH_SUPPORTS_AOUT S390: Update comments about why we don't use <asm-generic/statfs.h> SPARC: Use <asm-generic/statfs.h> PowerPC: Use <asm-generic/statfs.h> PARISC: Use <asm-generic/statfs.h> x86_64: Use <asm-generic/statfs.h> IA64: Use <asm-generic/statfs.h> ARM: Use <asm-generic/statfs.h> Make <asm-generic/statfs.h> suitable for 64-bit platforms. Define and use PCI_DEVICE_ID_MARVELL_88ALP01_CCIC for CAFÉ camera driver [MTD] [NAND] Define and use PCI_DEVICE_ID_MARVELL_88ALP01_NAND for CAFÉ Use PCI_DEVICE_ID_88ALP01 for CAFÉ chip, rather than PCI_DEVICE_ID_CAFE. EFS: Don't set f_fsid in statfs().
2008-10-13Merge branch 'master' of ↵David Woodhouse
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: include/asm-x86/statfs.h
2008-10-13Merge branches 'oprofile-v2' and 'timers/hpet' into x86/core-v4Ingo Molnar
2008-10-13Merge branch 'linus' into oprofile-v2Ingo Molnar
Conflicts: arch/x86/kernel/apic_32.c arch/x86/oprofile/nmi_int.c include/linux/pci_ids.h
2008-10-13x86: change early_ioremap to use slots instead of nestingYinghai Lu
so we could remove the requirement that one needs to call early_iounmap() in exactly reverse order of early_ioremap(). Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: adjust dependencies for CONFIG_X86_CMOVJan Beulich
Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13dumpstack: x86: various small unification steps, fixAlexander van Heukelum
After "dumpstack: x86: various small unification steps", the assembler gives the following compile error. The error is in dumpstack_64.c. {standard input}: Assembler messages: {standard input}:720: Error: Incorrect register `%rbx' used with `l' suffix {standard input}:1340: Error: Incorrect register `%r12' used with `l' suffix Indeed the suffix in get_bp() was wrong. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: remove additional_cpusThomas Gleixner
remove remainder of additional_cpus logic. We now just listen to the disabled_cpus value like we did for years. disabled_cpus is always >= 0 so no need for an extra check. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: remove additional_cpus configurabilityIngo Molnar
additional_cpus=<x> parameter is dangerous and broken: for example if we boot additional_cpus=-2 on a stock dual-core system it will crash the box on bootup. So reduce the maze of code a bit by removingthe user-configurability angle. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: improve UP kernel when CPU-hotplug and SMP is enabledThomas Gleixner
num_possible_cpus() can be > 1 when disabled CPUs have been accounted. Disabled CPUs are not in the cpu_present_map, so we can use num_present_cpus() as a safe indicator to switch to UP alternatives. Reported-by: Chuck Ebbert <cebbert@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13dumpstack: x86: various small unification stepsAlexander van Heukelum
- define STACKSLOTS_PER_LINE and use it - define get_bp macro to hide the %%ebp/%%rbp difference - i386: check task==NULL in dump_trace, like x86_64 - i386: show_trace(NULL, ...) uses current automatically - x86_64: use [#%d] for die_counter, like i386 - whitespace and comments Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13dumpstack: i386: make kstack= an early boot-param and add oops=panicAlexander van Heukelum
- make kstack= and early_param - add oops=panic, setting panic_on_oops Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13dumpstack: x86: use log_lvl and unify trace formattingAlexander van Heukelum
- x86: Write log_lvl strings if available - start raw stack dumps on new line - i386: Remove extra indentation for raw stack dumps Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13dumptrace: x86: consistently include loglevel, print stack switchAlexander van Heukelum
- i386 and x86_64: always printk the 'data' parameter - i386: announce stack switch (irq -> normal) - i386: check if there is a stack switch before announcing it There is a warning that 'context' might come out corrupt in early boot. If this is true it should be fixed, not worked around. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13dumpstack: x86: add "end" parameter to valid_stack_ptr and print_context_stackAlexander van Heukelum
- Add "end" parameter to valid_stack_ptr and print_context_stack - use sizeof(long) as the size of a word on the stack Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13dumpstack: x86: make printk_address equalAlexander van Heukelum
- x86_64: use %p to print an address - make i386-version the same as the above The result should be the same on x86_64; on i386 the output only changes if CONFIG_KALLSYMS is turned off, in which case the address is printed twice. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13dumpstack: x86: move die_nmi to dumpstack_32.cAlexander van Heukelum
For some reason die_nmi is still defined in traps.c for i386, but is found in dumpstack_64.c for x86_64. Move it to dumpstack_32.c Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: x86: finalize unification of traps.cAlexander van Heukelum
traps_32.c and traps_64.c are now equal. Move one to traps.c, delete the other one and change the Makefile Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: x86: make traps_32.c and traps_64.c equalAlexander van Heukelum
Use CONFIG_X86_64/CONFIG_X86_32 to condtionally compile the parts needed for x86_64 or i386 only. Runs a small userspace for a number of minimal configurations and boots the defconfigs. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: x86: various noop-changes preparing for unification of traps_xx.cAlexander van Heukelum
- reordering include files - whitespace changes - comment changes - removed unused bad_intr() - make default_do_nmi static Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: x86_64: use task_pid_nr(tsk) instead of tsk->pid in do_general_protectionAlexander van Heukelum
Use task_pid_nr(tsk) instead of tsk->pid in do_general_protection. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: i386: expand clear_mem_error and remove from mach_traps.hAlexander van Heukelum
This is the last user of clear_mem_error, which is defined only on i386. Expand the inline function and remove it from include/asm-x86/mach-default/mach_traps.h Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: x86_64: make io_check_error equal to the one on i386Alexander van Heukelum
Make io_check_error equal to the one on i386. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: i386: use preempt_conditional_sti/cli in do_int3Alexander van Heukelum
Use preempt_conditional_sti/cli in do_int3, like on x86_64. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: x86_64: make math_state_restore more like i386Alexander van Heukelum
- rename variable me -> tsk - get thread and tsk like i386 - expand used_math() - copy comment Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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