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2009-12-03KVM: x86: include pvclock MSRs in msrs_to_saveGlauber Costa
For a while now, we are issuing a rdmsr instruction to find out which msrs in our save list are really supported by the underlying machine. However, it fails to account for kvm-specific msrs, such as the pvclock ones. This patch moves then to the beginning of the list, and skip testing them. Cc: stable@kernel.org Signed-off-by: Glauber Costa <glommer@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03KVM: x86: Rework guest single-step flag injection and filteringJan Kiszka
Push TF and RF injection and filtering on guest single-stepping into the vender get/set_rflags callbacks. This makes the whole mechanism more robust wrt user space IOCTL order and instruction emulations. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: x86: disable paravirt mmu reportingMarcelo Tosatti
Disable paravirt MMU capability reporting, so that new (or rebooted) guests switch to native operation. Paravirt MMU is a burden to maintain and does not bring significant advantages compared to shadow anymore. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: x86: Refactor guest debug IOCTL handlingJan Kiszka
Much of so far vendor-specific code for setting up guest debug can actually be handled by the generic code. This also fixes a minor deficit in the SVM part /wrt processing KVM_GUESTDBG_ENABLE. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: remove pre_task_link setting in save_state_to_tss16Juan Quintela
Now, also remove pre_task_link setting in save_state_to_tss16. commit b237ac37a149e8b56436fabf093532483bff13b0 Author: Gleb Natapov <gleb@redhat.com> Date: Mon Mar 30 16:03:24 2009 +0300 KVM: Fix task switch back link handling. CC: Gleb Natapov <gleb@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03KVM: Fix hotplug of CPUsZachary Amsden
Both VMX and SVM require per-cpu memory allocation, which is done at module init time, for only online cpus. Backend was not allocating enough structure for all possible CPUs, so new CPUs coming online could not be hardware enabled. Signed-off-by: Zachary Amsden <zamsden@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03KVM: Fix printk name error in svm.cZachary Amsden
Signed-off-by: Zachary Amsden <zamsden@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03KVM: Kill the confusing tsc_ref_khz and ref_freq variablesZachary Amsden
They are globals, not clearly protected by any ordering or locking, and vulnerable to various startup races. Instead, for variable TSC machines, register the cpufreq notifier and get the TSC frequency directly from the cpufreq machinery. Not only is it always right, it is also perfectly accurate, as no error prone measurement is required. On such machines, when a new CPU online is brought online, it isn't clear what frequency it will start with, and it may not correspond to the reference, thus in hardware_enable we clear the cpu_tsc_khz variable to zero and make sure it is set before running on a VCPU. Signed-off-by: Zachary Amsden <zamsden@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03KVM: Separate timer intialization into an indepedent functionZachary Amsden
Signed-off-by: Zachary Amsden <zamsden@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03KVM: SVM: Remove remaining occurences of rdtscllJoerg Roedel
This patch replaces them with native_read_tsc() which can also be used in expressions and saves a variable on the stack in this case. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03KVM: SVM: don't copy exit_int_info on nested vmrunJoerg Roedel
The exit_int_info field is only written by the hardware and never read. So it does not need to be copied on a vmrun emulation. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03KVM: SVM: reorganize svm_interrupt_allowedJoerg Roedel
This patch reorganizes the logic in svm_interrupt_allowed to make it better to read. This is important because the logic is a lot more complicated with Nested SVM. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03KVM: remove duplicated #includeHuang Weiyi
Remove duplicated #include('s) in arch/x86/kvm/lapic.c Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03KVM: Activate Virtualization On DemandAlexander Graf
X86 CPUs need to have some magic happening to enable the virtualization extensions on them. This magic can result in unpleasant results for users, like blocking other VMMs from working (vmx) or using invalid TLB entries (svm). Currently KVM activates virtualization when the respective kernel module is loaded. This blocks us from autoloading KVM modules without breaking other VMMs. To circumvent this problem at least a bit, this patch introduces on demand activation of virtualization. This means, that instead virtualization is enabled on creation of the first virtual machine and disabled on destruction of the last one. So using this, KVM can be easily autoloaded, while keeping other hypervisors usable. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: SVM: remove needless mmap_sem acquision from nested_svm_mapMarcelo Tosatti
nested_svm_map unnecessarily takes mmap_sem around gfn_to_page, since gfn_to_page / get_user_pages are responsible for it. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: VMX: Enhance invalid guest state emulationMohammed Gamal
- Change returned handle_invalid_guest_state() to return relevant exit codes - Move triggering the emulation from vmx_vcpu_run() to vmx_handle_exit() - Return to userspace instead of repeatedly trying to emulate instructions that have already failed Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03KVM: x86 emulator: Add pusha and popa instructionsMohammed Gamal
This adds pusha and popa instructions (opcodes 0x60-0x61), this enables booting MINIX with invalid guest state emulation on. [marcelo: remove unused variable] Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: x86 emulator: Add missing decoder flags for 'or' instructionsMohammed Gamal
Add missing decoder flags for or instructions (0xc-0xd). Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Move assigned device code to own fileAvi Kivity
Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Return -ENOTTY on unrecognized ioctlsAvi Kivity
Not the incorrect -EINVAL. Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Drop kvm->irq_lock lock from irq injection pathGleb Natapov
The only thing it protects now is interrupt injection into lapic and this can work lockless. Even now with kvm->irq_lock in place access to lapic is not entirely serialized since vcpu access doesn't take kvm->irq_lock. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Move IO APIC to its own lockGleb Natapov
The allows removal of irq_lock from the injection path. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Move irq ack notifier list to arch independent codeGleb Natapov
Mask irq notifier list is already there. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Maintain back mapping from irqchip/pin to gsiGleb Natapov
Maintain back mapping from irqchip/pin to gsi to speedup interrupt acknowledgment notifications. [avi: build fix on non-x86/ia64] Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Move irq sharing information to irqchip levelGleb Natapov
This removes assumptions that max GSIs is smaller than number of pins. Sharing is tracked on pin level not GSI level. [avi: no PIC on ia64] Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Call pic_clear_isr() on pic reset to reuse logic thereGleb Natapov
Also move call of ack notifiers after pic state change. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: Don't pass kvm_run argumentsAvi Kivity
They're just copies of vcpu->run, which is readily accessible. Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: x86 emulator: Introduce No64 decode optionMohammed Gamal
Introduces a new decode option "No64", which is used for instructions that are invalid in long mode. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03KVM: x86 emulator: Add 'push/pop sreg' instructionsMohammed Gamal
[avi: avoid buffer overflow] Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-03Merge remote branch 'tip/x86/entry' into kvm-updates/2.6.33Avi Kivity
Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-02x86, mce: don't restart timer if disabledHidetoshi Seto
Even it is in error path unlikely taken, add_timer_on() at CPU_DOWN_FAILED* needs to be skipped if mce_timer is disabled. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Huang Ying <ying.huang@intel.com> Cc: Jan Beulich <jbeulich@novell.com> Cc: <stable@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-12-02x86/alternatives: No need for alternatives-asm.h to re-invent stuff already ↵Jan Beulich
in asm.h This at once also gets the alignment specification right for x86-64. Signed-off-by: Jan Beulich <jbeulich@novell.com> LKML-Reference: <4B0FF8F80200007800022708@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-02x86/alternatives: Check replacementlen <= instrlen at build timeJan Beulich
Having run into the run-(boot-)time check a couple of times lately, I finally took time to find a build-time check so that one doesn't need to analyze the register/stack dump and resolve this (through manual lookup in vmlinux) to the offending construct. The assembler will emit a message like "Error: value of <num> too large for field of 1 bytes at <offset>", which while not pointing out the source location still makes analysis quite a bit easier. Signed-off-by: Jan Beulich <jbeulich@novell.com> LKML-Reference: <4B0FF8AA0200007800022703@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-02x86: Fix comments of register/stack access functionsMasami Hiramatsu
Fix typos and some redundant comments of register/stack access functions in asm/ptrace.h. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Roland McGrath <roland@redhat.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Wenji Huang <wenji.huang@oracle.com> Cc: Mahesh J Salgaonkar <mahesh@linux.vnet.ibm.com> LKML-Reference: <20091201000222.7669.7477.stgit@harusame> Signed-off-by: Ingo Molnar <mingo@elte.hu> Suggested-by: Wenji Huang <wenji.huang@oracle.com>
2009-12-02x86: Remove unnecessary mdelay() from cpu_disable_common()Suresh Siddha
fixup_irqs() already has a mdelay(). Remove the extra and unnecessary mdelay() from cpu_disable_common(). Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: ebiederm@xmission.com Cc: garyhade@us.ibm.com LKML-Reference: <20091201233335.232177348@sbs-t61.sc.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-02x86, ioapic: Document another case when level irq is seen as an edgeSuresh Siddha
In the case when cpu goes offline, fixup_irqs() will forward any unhandled interrupt on the offlined cpu to the new cpu destination that is handling the corresponding interrupt. This interrupt forwarding is done via IPI's. Hence, in this case also level-triggered io-apic interrupt will be seen as an edge interrupt in the cpu's APIC IRR. Document this scenario in the code which handles this case by doing an explicit EOI to the io-apic to clear remote IRR of the io-apic RTE. Requested-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: ebiederm@xmission.com Cc: garyhade@us.ibm.com LKML-Reference: <20091201233335.143970505@sbs-t61.sc.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-02x86, ioapic: Fix the EOI register detection mechanismSuresh Siddha
Maciej W. Rozycki reported: > 82093AA I/O APIC has its version set to 0x11 and it > does not support the EOI register. Similarly I/O APICs > integrated into the 82379AB south bridge and the 82374EB/SB > EISA component. IO-APIC versions below 0x20 don't support EOI register. Some of the Intel ICH Specs (ICH2 to ICH5) documents the io-apic version as 0x2. This is an error with documentation and these ICH chips use io-apic's of version 0x20 and indeed has a working EOI register for the io-apic. Fix the EOI register detection mechanism to check for version 0x20 and beyond. And also, a platform can potentially have io-apic's with different versions. Make the EOI register check per io-apic. Reported-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: ebiederm@xmission.com Cc: garyhade@us.ibm.com LKML-Reference: <20091201233335.065361533@sbs-t61.sc.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-02x86, io-apic: Move the effort of clearing remoteIRR explicitly before ↵Maciej W. Rozycki
migrating the irq When the level-triggered interrupt is seen as an edge interrupt, we try to clear the remoteIRR explicitly (using either an io-apic eoi register when present or through the idea of changing trigger mode of the io-apic RTE to edge and then back to level). But this explicit try also needs to happen before we try to migrate the irq. Otherwise irq migration attempt will fail anyhow, as it postpones the irq migration to a later attempt when it sees the remoteIRR in the io-apic RTE still set. Signed-off-by: "Maciej W. Rozycki" <macro@linux-mips.org> Reviewed-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: ebiederm@xmission.com Cc: garyhade@us.ibm.com LKML-Reference: <20091201233334.975416130@sbs-t61.sc.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-02hw-breakpoints: Keep track of user disabled breakpointsFrederic Weisbecker
When we disable a breakpoint through dr7, we unregister it right away, making us lose track of its corresponding address register value. It means that the following sequence would be unsupported: - set address in dr0 - enable it through dr7 - disable it through dr7 - enable it through dr7 because we lost the address register value when we disabled the breakpoint. Don't unregister the disabled breakpoints but rather disable them. Reported-by: "K.Prasad" <prasad@linux.vnet.ibm.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1259735536-9236-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-01Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: net/mac80211/ht.c
2009-12-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6Herbert Xu
2009-11-30x86, mm: Correct the implementation of is_untracked_pat_range()H. Peter Anvin
The semantics the PAT code expect of is_untracked_pat_range() is "is this range completely contained inside the untracked region." This means that checkin 8a27138924f64d2f30c1022f909f74480046bc3f was technically wrong, because the implementation needlessly confusing. The sane interface is for it to take a semiclosed range like just about everything else (as evidenced by the sheer number of "- 1"'s removed by that patch) so change the actual implementation to match. Reported-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jack Steiner <steiner@sgi.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> LKML-Reference: <20091119202341.GA4420@sgi.com>
2009-11-30x86: Fix a section mismatch in arch/x86/kernel/setup.cHelight.Xu
copy_edd() should be __init. warning msg: WARNING: vmlinux.o(.text+0x7759): Section mismatch in reference from the function copy_edd() to the variable .init.data:boot_params The function copy_edd() references the variable __initdata boot_params. This is often because copy_edd lacks a __initdata annotation or the annotation of boot_params is wrong. Signed-off-by: ZhenwenXu <helight.xu@gmail.com> LKML-Reference: <4B139F8F.4000907@gmail.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-11-28x86: Use -maccumulate-outgoing-args for sane mcount prologuesThomas Gleixner
commit 746357d (x86: Prevent GCC 4.4.x (pentium-mmx et al) function prologue wreckage) uses -mtune=generic to work around the function prologue problem with mcount on -march=pentium-mmx and others. Jakub pointed out that we can use -maccumulate-outgoing-args instead which is selected by -mtune=generic and prevents the problem without losing the -march specific optimizations. Pointed-out-by: Jakub Jelinek <jakub@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: stable@kernel.org
2009-11-27x86: hpet: Make WARN_ON understandableThomas Gleixner
Andrew complained rightly that the WARN_ON in hpet_next_event() is confusing and the code comment not really helpful. Change it to WARN_ONCE and print the reason in clear text. Change the comment to explain what kind of hardware wreckage we deal with. Pointed-out-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Venki Pallipadi <venkatesh.pallipadi@intel.com>
2009-11-27x86/amd-iommu: Remove amd_iommu_pd_tableJoerg Roedel
The data that was stored in this table is now available in dev->archdata.iommu. So this table is not longer necessary. This patch removes the remaining uses of that variable and removes it from the code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-11-27x86/amd-iommu: Move reset_iommu_command_buffer out of locked codeJoerg Roedel
This patch removes the ugly contruct where the iommu->lock must be released while before calling the reset_iommu_command_buffer function. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-11-27x86/amd-iommu: Cleanup DTE flushing codeJoerg Roedel
This patch cleans up the code to flush device table entries in the IOMMU. With this chance the driver can get rid of the iommu_queue_inv_dev_entry() function. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-11-27x86/amd-iommu: Introduce iommu_flush_device() functionJoerg Roedel
This patch adds a function to flush a DTE entry for a given struct device and replaces iommu_queue_inv_dev_entry calls with this function where appropriate. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-11-27x86/amd-iommu: Cleanup attach/detach_device codeJoerg Roedel
This patch cleans up the attach_device and detach_device paths and fixes reference counting while at it. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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