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2016-01-15Merge branch 'kvm-ppc-next' of ↵Paolo Bonzini5-16/+32
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD
2016-01-14KVM: PPC: Fix ONE_REG AltiVec supportGreg Kurz1-10/+10
The get and set operations got exchanged by mistake when moving the code from book3s.c to powerpc.c. Fixes: 3840edc8033ad5b86deee309c1c321ca54257452 Cc: stable@vger.kernel.org # 3.18+ Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2016-01-12kvm: x86: Fix vmwrite to SECONDARY_VM_EXEC_CONTROLHuaitong Han1-1/+2
vmx_cpuid_tries to update SECONDARY_VM_EXEC_CONTROL in the VMCS, but it will cause a vmwrite error on older CPUs because the code does not check for the presence of CPU_BASED_ACTIVATE_SECONDARY_CONTROLS. This will get rid of the following trace on e.g. Core2 6600: vmwrite error: reg 401e value 10 (err 12) Call Trace: [<ffffffff8116e2b9>] dump_stack+0x40/0x57 [<ffffffffa020b88d>] vmx_cpuid_update+0x5d/0x150 [kvm_intel] [<ffffffffa01d8fdc>] kvm_vcpu_ioctl_set_cpuid2+0x4c/0x70 [kvm] [<ffffffffa01b8363>] kvm_arch_vcpu_ioctl+0x903/0xfa0 [kvm] Fixes: feda805fe7c4ed9cf78158e73b1218752e3b4314 Cc: stable@vger.kernel.org Reported-by: Zdenek Kaspar <zkaspar82@gmail.com> Signed-off-by: Huaitong Han <huaitong.han@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08kvm/x86: Hyper-V SynIC timers tracepointsAndrey Smetanin2-1/+196
Trace the following Hyper SynIC timers events: * periodic timer start * one-shot timer start * timer callback * timer expiration and message delivery result * timer config setup * timer count setup * timer cleanup Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08kvm/x86: Hyper-V SynIC tracepointsAndrey Smetanin2-5/+98
Trace the following Hyper SynIC events: * set msr * set sint irq * ack sint * sint irq eoi Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08kvm/x86: Update SynIC timers on guest entry onlyAndrey Smetanin2-19/+25
Consolidate updating the Hyper-V SynIC timers in a single place: on guest entry in processing KVM_REQ_HV_STIMER request. This simplifies the overall logic, and makes sure the most current state of msrs and guest clock is used for arming the timers (to achieve that, KVM_REQ_HV_STIMER has to be processed after KVM_REQ_CLOCK_UPDATE). Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08kvm/x86: Skip SynIC vector check for QEMU sideAndrey Smetanin1-3/+4
QEMU zero-inits Hyper-V SynIC vectors. We should allow that, and don't reject zero values if set by the host. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08kvm/x86: Hyper-V fix SynIC timer disabling conditionAndrey Smetanin1-1/+1
Hypervisor Function Specification(HFS) doesn't require to disable SynIC timer at timer config write if timer->count = 0. So drop this check, this allow to load timers MSR's during migration restore, because config are set before count in QEMU side. Also fix condition according to HFS doc(15.3.1): "It is not permitted to set the SINTx field to zero for an enabled timer. If attempted, the timer will be marked disabled (that is, bit 0 cleared) immediately." Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08kvm/x86: Reorg stimer_expiration() to better control timer restartAndrey Smetanin1-12/+14
Split stimer_expiration() into two parts - timer expiration message sending and timer restart/cleanup based on timer state(config). This also fixes a bug where a one-shot timer message whose delivery failed once would get lost for good. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08kvm/x86: Hyper-V unify stimer_start() and stimer_restart()Andrey Smetanin1-23/+20
This will be used in future to start Hyper-V SynIC timer in several places by one logic in one function. Changes v2: * drop stimer->count == 0 check inside stimer_start() * comment stimer_start() assumptions Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08kvm/x86: Drop stimer_stop() functionAndrey Smetanin1-6/+1
The function stimer_stop() is called in one place so remove the function and replace it's call by function content. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08kvm/x86: Hyper-V timers fix incorrect logical operationAndrey Smetanin1-1/+1
Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08KVM: move architecture-dependent requests to arch/Paolo Bonzini6-51/+53
Since the numbers now overlap, it makes sense to enumerate them in asm/kvm_host.h rather than linux/kvm_host.h. Functions that refer to architecture-specific requests are also moved to arch/. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08KVM: renumber vcpu->request bitsPaolo Bonzini1-30/+29
Leave room for 4 more arch-independent requests. Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08KVM: document which architecture uses each request bitPaolo Bonzini1-7/+13
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08KVM: Remove unused KVM_REQ_KICK to save a bit in vcpu->requestsPaolo Bonzini1-1/+1
Suggested-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> [Takuya moved all subsequent constants to fill the void, but that is useless in view of the following patches. So this change looks nothing like the original. - Paolo] Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-08Merge tag 'kvm-s390-next-4.5-3' of ↵Paolo Bonzini4-2/+28
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD KVM: s390: Feature and fix for 4.5 - allow the runtime instrumentation support inside the guests - remove a useless memory barrier
2016-01-07kvm: x86: Check kvm_write_guest return value in kvm_write_wall_clockNicholas Krause1-1/+2
This makes sure the wall clock is updated only after an odd version value is successfully written to guest memory. Signed-off-by: Nicholas Krause <xerofoify@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-07KVM: s390: implement the RI support of guestFan Zhang4-1/+28
This patch adds runtime instrumentation support for KVM guest. We need to setup a save area for the runtime instrumentation-controls control block(RICCB) and implement the necessary interfaces to live migrate the guest settings. We setup the sie control block in a way, that the runtime instrumentation instructions of a guest are handled by hardware. We also add a capability KVM_CAP_S390_RI to make this feature opt-in as it needs migration support. Signed-off-by: Fan Zhang <zhangfan@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-01-07kvm/s390: drop unpaired smp_mbMichael S. Tsirkin1-1/+0
smp_mb on vcpu destroy isn't paired with anything, violating pairing rules, and seems to be useless. Drop it. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <1452010811-25486-1-git-send-email-mst@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-01-07kvm: x86: fix comment about {mmu,nested_mmu}.gva_to_gpaDavid Matlack1-4/+6
The comment had the meaning of mmu.gva_to_gpa and nested_mmu.gva_to_gpa swapped. Fix that, and also add some details describing how each translation works. Signed-off-by: David Matlack <dmatlack@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-01-07Merge tag 'kvm-arm-for-4.5-1' of ↵Paolo Bonzini836-6814/+11543
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-next KVM/ARM changes for Linux v4.5 - Complete rewrite of the arm64 world switch in C, hopefully paving the way for more sharing with the 32bit code, better maintainability and easier integration of new features. Also smaller and slightly faster in some cases... - Support for 16bit VM identifiers - Various cleanups
2015-12-18KVM: x86: MMU: Use clear_page() instead of init_shadow_page_table()Takuya Yoshikawa1-9/+1
Not just in order to clean up the code, but to make it faster by using enhanced instructions: the initialization became 20-30% faster on our testing machine. Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-18arm/arm64: KVM: Detect vGIC presence at runtimePavel Fedin1-2/+20
Before commit 662d9715840aef44dcb573b0f9fab9e8319c868a ("arm/arm64: KVM: Kill CONFIG_KVM_ARM_{VGIC,TIMER}") is was possible to compile the kernel without vGIC and vTimer support. Commit message says about possibility to detect vGIC support in runtime, but this has never been implemented. This patch introduces runtime check, restoring the lost functionality. It again allows to use KVM on hardware without vGIC. Interrupt controller has to be emulated in userspace in this case. -ENODEV return code from probe function means there's no GIC at all. -ENXIO happens when, for example, there is GIC node in the device tree, but it does not specify vGIC resources. Any other error code is still treated as full stop because it might mean some really serious problems. Signed-off-by: Pavel Fedin <p.fedin@samsung.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-12-18MAINTAINERS: add git URL for KVM/ARMFengguang Wu1-0/+1
Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-12-18arm64: KVM: Add support for 16-bit VMIDVladimir Murzin6-4/+33
The ARMv8.1 architecture extension allows to choose between 8-bit and 16-bit of VMID, so use this capability for KVM. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-12-18arm: KVM: Make kvm_arm.h friendly to assembly codeVladimir Murzin1-16/+17
kvm_arm.h is included from both C code and assembly code; however some definitions in this header supplied with U/UL/ULL suffixes which might confuse assembly once they got evaluated. We have _AC macro for such cases, so just wrap problem places with it. Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-12-18arm/arm64: KVM: Remove unreferenced S2_PGD_ORDERVladimir Murzin3-5/+3
Since commit a987370 ("arm64: KVM: Fix stage-2 PGD allocation to have per-page refcounting") there is no reference to S2_PGD_ORDER, so kill it for the good. Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-12-18arm64: KVM: debug: Remove spurious inline attributesMarc Zyngier1-29/+29
The debug trapping code is pretty heavy on the "inline" attribute, but most functions are actually referenced in the sysreg tables, making the inlining imposible. Removing the useless inline qualifier seems the right thing to do, having verified that the output code is similar. Cc: Alex Bennée <alex.bennee@linaro.org> Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-12-18ARM: KVM: Cleanup exception injectionMarc Zyngier1-36/+38
David Binderman reported that the exception injection code had a couple of unused variables lingering around. Upon examination, it looked like this code could do with an anticipated spring cleaning, which amounts to deduplicating the CPSR/SPSR update, and making it look a bit more like the architecture spec. The spurious variables are removed in the process. Reported-by: David Binderman <dcb314@hotmail.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-12-16kvm/x86: Remove Hyper-V SynIC timer stoppingAndrey Smetanin1-1/+0
It's possible that guest send us Hyper-V EOM at the middle of Hyper-V SynIC timer running, so we start processing of Hyper-V SynIC timers in vcpu context and stop the Hyper-V SynIC timer unconditionally: host guest ------------------------------------------------------------------------------ start periodic stimer start periodic timer timer expires after 15ms send expiration message into guest restart periodic timer timer expires again after 15 ms msg slot is still not cleared so setup ->msg_pending (1) restart periodic timer process timer msg and clear slot ->msg_pending was set: send EOM into host received EOM kvm_make_request(KVM_REQ_HV_STIMER) kvm_hv_process_stimers(): ... stimer_stop() if (time_now >= stimer->exp_time) stimer_expiration(stimer); Because the timer was rearmed at (1), time_now < stimer->exp_time and stimer_expiration is not called. The timer then never fires. The patch fixes such situation by not stopping Hyper-V SynIC timer at all, because it's safe to restart it without stop in vcpu context and timer callback always returns HRTIMER_NORESTART. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16kvm: Dump guest rIP when the guest tried something unsupportedBorislav Petkov1-1/+2
It looks like this in action: kvm [5197]: vcpu0, guest rIP: 0xffffffff810187ba unhandled rdmsr: 0xc001102 and helps to pinpoint quickly where in the guest we did the unsupported thing. Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16KVM: vmx: detect mismatched size in VMCS read/writePaolo Bonzini1-17/+83
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> --- I am sending this as RFC because the error messages it produces are very ugly. Because of inlining, the original line is lost. The alternative is to change vmcs_read/write/checkXX into macros, but then you need to have a single huge BUILD_BUG_ON or BUILD_BUG_ON_MSG because multiple BUILD_BUG_ON* with the same __LINE__ are not supported well.
2015-12-16KVM: VMX: fix read/write sizes of VMCS fields in dump_vmcsPaolo Bonzini1-19/+20
This was not printing the high parts of several 64-bit fields on 32-bit kernels. Separate from the previous one to make the patches easier to review. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16KVM: VMX: fix read/write sizes of VMCS fieldsPaolo Bonzini1-4/+4
In theory this should have broken EPT on 32-bit kernels (due to reading the high part of natural-width field GUEST_CR3). Not sure if no one noticed or the processor behaves differently from the documentation. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16KVM: VMX: fix the writing POSTED_INTR_NVLi RongQing1-2/+2
POSTED_INTR_NV is 16bit, should not use 64bit write function [ 5311.676074] vmwrite error: reg 3 value 0 (err 12) [ 5311.680001] CPU: 49 PID: 4240 Comm: qemu-system-i38 Tainted: G I 4.1.13-WR8.0.0.0_standard #1 [ 5311.689343] Hardware name: Intel Corporation S2600WT2/S2600WT2, BIOS SE5C610.86B.01.01.0008.021120151325 02/11/2015 [ 5311.699550] 00000000 00000000 e69a7e1c c1950de1 00000000 e69a7e38 fafcff45 fafebd24 [ 5311.706924] 00000003 00000000 0000000c b6a06dfa e69a7e40 fafcff79 e69a7eb0 fafd5f57 [ 5311.714296] e69a7ec0 c1080600 00000000 00000001 c0e18018 000001be 00000000 00000b43 [ 5311.721651] Call Trace: [ 5311.722942] [<c1950de1>] dump_stack+0x4b/0x75 [ 5311.726467] [<fafcff45>] vmwrite_error+0x35/0x40 [kvm_intel] [ 5311.731444] [<fafcff79>] vmcs_writel+0x29/0x30 [kvm_intel] [ 5311.736228] [<fafd5f57>] vmx_create_vcpu+0x337/0xb90 [kvm_intel] [ 5311.741600] [<c1080600>] ? dequeue_task_fair+0x2e0/0xf60 [ 5311.746197] [<faf3b9ca>] kvm_arch_vcpu_create+0x3a/0x70 [kvm] [ 5311.751278] [<faf29e9d>] kvm_vm_ioctl+0x14d/0x640 [kvm] [ 5311.755771] [<c1129d44>] ? free_pages_prepare+0x1a4/0x2d0 [ 5311.760455] [<c13e2842>] ? debug_smp_processor_id+0x12/0x20 [ 5311.765333] [<c10793be>] ? sched_move_task+0xbe/0x170 [ 5311.769621] [<c11752b3>] ? kmem_cache_free+0x213/0x230 [ 5311.774016] [<faf29d50>] ? kvm_set_memory_region+0x60/0x60 [kvm] [ 5311.779379] [<c1199fa2>] do_vfs_ioctl+0x2e2/0x500 [ 5311.783285] [<c11752b3>] ? kmem_cache_free+0x213/0x230 [ 5311.787677] [<c104dc73>] ? __mmdrop+0x63/0xd0 [ 5311.791196] [<c104dc73>] ? __mmdrop+0x63/0xd0 [ 5311.794712] [<c104dc73>] ? __mmdrop+0x63/0xd0 [ 5311.798234] [<c11a2ed7>] ? __fget+0x57/0x90 [ 5311.801559] [<c11a2f72>] ? __fget_light+0x22/0x50 [ 5311.805464] [<c119a240>] SyS_ioctl+0x80/0x90 [ 5311.808885] [<c1957d30>] sysenter_do_call+0x12/0x12 [ 5312.059280] kvm: zapping shadow pages for mmio generation wraparound [ 5313.678415] kvm [4231]: vcpu0 disabled perfctr wrmsr: 0xc2 data 0xffff [ 5313.726518] kvm [4231]: vcpu0 unhandled rdmsr: 0x570 Signed-off-by: Li RongQing <roy.qing.li@gmail.com> Cc: Yang Zhang <yang.z.zhang@Intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16kvm/x86: Hyper-V SynIC timersAndrey Smetanin6-3/+368
Per Hyper-V specification (and as required by Hyper-V-aware guests), SynIC provides 4 per-vCPU timers. Each timer is programmed via a pair of MSRs, and signals expiration by delivering a special format message to the configured SynIC message slot and triggering the corresponding synthetic interrupt. Note: as implemented by this patch, all periodic timers are "lazy" (i.e. if the vCPU wasn't scheduled for more than the timer period the timer events are lost), regardless of the corresponding configuration MSR. If deemed necessary, the "catch up" mode (the timer period is shortened until the timer catches up) will be implemented later. Changes v2: * Use remainder to calculate periodic timer expiration time Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Vitaly Kuznetsov <vkuznets@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16kvm/x86: Hyper-V SynIC message slot pending clearing at SINT ackAndrey Smetanin2-0/+33
The SynIC message protocol mandates that the message slot is claimed by atomically setting message type to something other than HVMSG_NONE. If another message is to be delivered while the slot is still busy, message pending flag is asserted to indicate to the guest that the hypervisor wants to be notified when the slot is released. To make sure the protocol works regardless of where the message sources are (kernel or userspace), clear the pending flag on SINT ACK notification, and let the message sources compete for the slot again. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Vitaly Kuznetsov <vkuznets@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16kvm/x86: Hyper-V internal helper to read MSR HV_X64_MSR_TIME_REF_COUNTAndrey Smetanin1-4/+7
This helper will be used also in Hyper-V SynIC timers implementation. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Vitaly Kuznetsov <vkuznets@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16kvm/x86: Added Hyper-V vcpu_to_hv_vcpu()/hv_vcpu_to_vcpu() helpersAndrey Smetanin1-6/+14
Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Vitaly Kuznetsov <vkuznets@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16kvm/x86: Rearrange func's declarations inside Hyper-V headerAndrey Smetanin1-10/+10
This rearrangement places functions declarations together according to their functionality, so future additions will be simplier. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Vitaly Kuznetsov <vkuznets@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16drivers/hv: Move struct hv_timer_message_payload into UAPI Hyper-V x86 headerAndrey Smetanin2-9/+8
This struct is required for Hyper-V SynIC timers implementation inside KVM and for upcoming Hyper-V VMBus support by userspace(QEMU). So place it into Hyper-V UAPI header. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Vitaly Kuznetsov <vkuznets@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16drivers/hv: Move struct hv_message into UAPI Hyper-V x86 headerAndrey Smetanin2-75/+76
This struct is required for Hyper-V SynIC timers implementation inside KVM and for upcoming Hyper-V VMBus support by userspace(QEMU). So place it into Hyper-V UAPI header. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Acked-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Vitaly Kuznetsov <vkuznets@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16drivers/hv: Move HV_SYNIC_STIMER_COUNT into Hyper-V UAPI x86 headerAndrey Smetanin2-2/+2
This constant is required for Hyper-V SynIC timers MSR's support by userspace(QEMU). Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Acked-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Vitaly Kuznetsov <vkuznets@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16drivers/hv: replace enum hv_message_type by u32Andrey Smetanin1-2/+2
enum hv_message_type inside struct hv_message, hv_post_message is not size portable. Replace enum by u32. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Vitaly Kuznetsov <vkuznets@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-12-16Merge tag 'kvm-s390-next-4.5-2' of ↵Paolo Bonzini7-18/+50
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD KVM: s390 features and fixes for 4.5 (kvm/next) Some small cleanups - use assignment instead of memcpy - use %pK for kernel pointers Changes regarding guest memory size - Fix an off-by-one error in our guest memory interface (we might use unnecessarily big page tables, e.g. 3 levels for a 2GB guest instead of 2 levels) - We now ask the machine about the max. supported guest address and limit accordingly.
2015-12-15KVM: s390: consider system MHA for guest storageGuenther Hutzl2-2/+12
Verify that the guest maximum storage address is below the MHA (maximum host address) value allowed on the host. Acked-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Guenther Hutzl <hutzl@linux.vnet.ibm.com> Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> [adopt to match recent limit,size changes] Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-12-15KVM: s390: fix mismatch between user and in-kernel guest limitDominik Dingel5-8/+27
While the userspace interface requests the maximum size the gmap code expects to get a maximum address. This error resulted in bigger page tables than necessary for some guest sizes, e.g. a 2GB guest used 3 levels instead of 2. At the same time we introduce KVM_S390_NO_MEM_LIMIT, which allows in a bright future that a guest spans the complete 64 bit address space. We also switch to TASK_MAX_SIZE for the initial memory size, this is a cosmetic change as the previous size also resulted in a 4 level pagetable creation. Reported-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-12-15KVM: s390: obey kptr_restrict in tracesChristian Borntraeger2-7/+8
The s390dbf and trace events provide a debugfs interface. If kptr_restrict is active, we should not expose kernel pointers. We can fence the debugfs output by using %pK instead of %p. Cc: Kees Cook <keescook@chromium.org> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-12-15KVM: s390: use assignment instead of memcpyChristian Borntraeger1-2/+4
Replace two memcpy with proper assignment. Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-06 19:25:18 +0300