summaryrefslogtreecommitdiffstats
path: root/virt/kvm/arm
Commit message (Collapse)AuthorAgeFilesLines
* KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctlChristoffer Dall2017-12-141-18/+40
| | | | | | | | | | | | | | | | | | Move the calls to vcpu_load() and vcpu_put() in to the architecture specific implementations of kvm_arch_vcpu_ioctl() which dispatches further architecture-specific ioctls on to other functions. Some architectures support asynchronous vcpu ioctls which cannot call vcpu_load() or take the vcpu->mutex, because that would prevent concurrent execution with a running VCPU, which is the intended purpose of these ioctls, for example because they inject interrupts. We repeat the separate checks for these specifics in the architecture code for MIPS, S390 and PPC, and avoid taking the vcpu->mutex and calling vcpu_load for these ioctls. Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_set_mpstateChristoffer Dall2017-12-141-2/+7
| | | | | | | | | | Move vcpu_load() and vcpu_put() into the architecture specific implementations of kvm_arch_vcpu_ioctl_set_mpstate(). Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_get_mpstateChristoffer Dall2017-12-141-0/+3
| | | | | | | | | | Move vcpu_load() and vcpu_put() into the architecture specific implementations of kvm_arch_vcpu_ioctl_get_mpstate(). Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_runChristoffer Dall2017-12-141-6/+14
| | | | | | | | | | | Move vcpu_load() and vcpu_put() into the architecture specific implementations of kvm_arch_vcpu_ioctl_run(). Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> # s390 parts Reviewed-by: Cornelia Huck <cohuck@redhat.com> [Rebased. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* Merge tag 'kvm-arm-fixes-for-v4.15-1' of ↵Radim Krčmář2017-12-059-50/+43Star
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm KVM/ARM Fixes for v4.15. Fixes: - A number of issues in the vgic discovered using SMATCH - A bit one-off calculation in out stage base address mask (32-bit and 64-bit) - Fixes to single-step debugging instructions that trap for other reasons such as MMMIO aborts - Printing unavailable hyp mode as error - Potential spinlock deadlock in the vgic - Avoid calling vgic vcpu free more than once - Broken bit calculation for big endian systems
| * KVM: arm/arm64: Fix broken GICH_ELRSR big endian conversionChristoffer Dall2017-12-041-4/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | We are incorrectly rearranging 32-bit words inside a 64-bit typed value for big endian systems, which would result in never marking a virtual interrupt as inactive on big endian systems (assuming 32 or fewer LRs on the hardware). Fix this by not doing any word order manipulation for the typed values. Cc: <stable@vger.kernel.org> Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: kvm_arch_destroy_vm cleanupsAndrew Jones2017-12-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | kvm_vgic_vcpu_destroy already gets called from kvm_vgic_destroy for each vcpu, so we don't have to call it from kvm_arch_vcpu_free. Additionally the other architectures set kvm->online_vcpus to zero after freeing them. We might as well do that for ARM too. Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: Fix spinlock acquisition in vgic_set_ownerMarc Zyngier2017-12-011-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | vgic_set_owner acquires the irq lock without disabling interrupts, resulting in a lockdep splat (an interrupt could fire and result in the same lock being taken if the same virtual irq is to be injected). In practice, it is almost impossible to trigger this bug, but better safe than sorry. Convert the lock acquisition to a spin_lock_irqsave() and keep lockdep happy. Reported-by: James Morse <james.morse@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * kvm: arm: don't treat unavailable HYP mode as an errorArd Biesheuvel2017-11-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Since it is perfectly legal to run the kernel at EL1, it is not actually an error if HYP mode is not available when attempting to initialize KVM, given that KVM support cannot be built as a module. So demote the kvm_err() to kvm_info(), which prevents the error from appearing on an otherwise 'quiet' console. Acked-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: Avoid attempting to load timer vgic state without a vgicChristoffer Dall2017-11-291-1/+4
| | | | | | | | | | | | | | | | | | | | The timer optimization patches inadvertendly changed the logic to always load the timer state as if we have a vgic, even if we don't have a vgic. Fix this by doing the usual irqchip_in_kernel() check and call the appropriate load function. Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * kvm: arm64: handle single-step of userspace mmio instructionsAlex Bennée2017-11-291-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | The system state of KVM when using userspace emulation is not complete until we return into KVM_RUN. To handle mmio related updates we wait until they have been committed and then schedule our KVM_EXIT_DEBUG. The kvm_arm_handle_step_debug() helper tells us if we need to return and sets up the exit_reason for us. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: vgic-v4: Only perform an unmap for valid vLPIsMarc Zyngier2017-11-291-2/+4
| | | | | | | | | | | | | | | | | | Before performing an unmap, let's check that what we have was really mapped the first place. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: vgic-its: Check result of allocation before useMarc Zyngier2017-11-291-0/+2
| | | | | | | | | | | | | | | | | | | | | | We miss a test against NULL after allocation. Fixes: 6d03a68f8054 ("KVM: arm64: vgic-its: Turn device_id validation into generic ID validation") Cc: stable@vger.kernel.org # 4.8 Reported-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: vgic-its: Preserve the revious read from the pending tableMarc Zyngier2017-11-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current pending table parsing code assumes that we keep the previous read of the pending bits, but keep that variable in the current block, making sure it is discarded on each loop. We end-up using whatever is on the stack. Who knows, it might just be the right thing... Fixes: 33d3bc9556a7d ("KVM: arm64: vgic-its: Read initial LPI pending table") Cc: stable@vger.kernel.org # 4.8 Reported-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: vgic: Preserve the revious read from the pending tableMarc Zyngier2017-11-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current pending table parsing code assumes that we keep the previous read of the pending bits, but keep that variable in the current block, making sure it is discarded on each loop. We end-up using whatever is on the stack. Who knows, it might just be the right thing... Fixes: 280771252c1ba ("KVM: arm64: vgic-v3: KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES") Cc: stable@vger.kernel.org # 4.12 Reported-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: vgic-irqfd: Fix MSI entry allocationMarc Zyngier2017-11-291-2/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | Using the size of the structure we're allocating is a good idea and avoids any surprise... In this case, we're happilly confusing kvm_kernel_irq_routing_entry and kvm_irq_routing_entry... Fixes: 95b110ab9a09 ("KVM: arm/arm64: Enable irqchip routing") Cc: stable@vger.kernel.org # 4.8 Reported-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: VGIC: extend !vgic_is_initialized guardAndre Przywara2017-11-291-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | Commit f39d16cbabf9 ("KVM: arm/arm64: Guard kvm_vgic_map_is_active against !vgic_initialized") introduced a check whether the VGIC has been initialized before accessing the spinlock and the VGIC data structure. However the vgic_get_irq() call in the variable declaration sneaked through the net, so lets make sure that this also gets called only after we actually allocated the arrays this function accesses. Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: Don't enable/disable physical timer access on VHEChristoffer Dall2017-11-292-34/+20Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | After the timer optimization rework we accidentally end up calling physical timer enable/disable functions on VHE systems, which is neither needed nor correct, since the CNTHCTL_EL2 register format is different when HCR_EL2.E2H is set. The CNTHCTL_EL2 is initialized when CPUs become online in kvm_timer_init_vhe() and we don't have to call these functions on VHE systems, which also allows us to inline the non-VHE functionality. Reported-by: Jintack Lim <jintack@cs.columbia.edu> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
* | KVM: Let KVM_SET_SIGNAL_MASK work as advertisedJan H. Schönherr2017-11-271-5/+3Star
|/ | | | | | | | | | | | | | | | | | KVM API says for the signal mask you set via KVM_SET_SIGNAL_MASK, that "any unblocked signal received [...] will cause KVM_RUN to return with -EINTR" and that "the signal will only be delivered if not blocked by the original signal mask". This, however, is only true, when the calling task has a signal handler registered for a signal. If not, signal evaluation is short-circuited for SIG_IGN and SIG_DFL, and the signal is either ignored without KVM_RUN returning or the whole process is terminated. Make KVM_SET_SIGNAL_MASK behave as advertised by utilizing logic similar to that in do_sigtimedwait() to avoid short-circuiting of signals. Signed-off-by: Jan H. Schönherr <jschoenh@amazon.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* Merge tag 'kvm-arm-gicv4-for-v4.15' of ↵Paolo Bonzini2017-11-1710-111/+641
|\ | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD GICv4 Support for KVM/ARM for v4.15
| * KVM: arm/arm64: Don't queue VLPIs on INV/INVALLChristoffer Dall2017-11-101-3/+6
| | | | | | | | | | | | | | | | Since VLPIs are injected directly by the hardware there's no need to mark these as pending in software and queue them on the AP list. Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: Fix GICv4 ITS initialization issuesChristoffer Dall2017-11-103-6/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We should only try to initialize GICv4 data structures on a GICv4 capable system. Move the vgic_supports_direct_msis() check inito vgic_v4_init() so that any KVM VGIC initialization path does not fail on non-GICv4 systems. Also be slightly more strict in the checking of the return value in vgic_its_create, and only error out on negative return values from the vgic_v4_init() function. This is important because the kvm device code only treats negative values as errors and only cleans up in this case. Errornously treating a positive return value as an error from the vgic_v4_init() function can lead to NULL pointer dereferences, as has recently been observed. Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Theory of operationsMarc Zyngier2017-11-101-0/+67
| | | | | | | | | | | | | | | | Yet another braindump so I can free some cells... Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Enable VLPI supportMarc Zyngier2017-11-101-0/+14
| | | | | | | | | | | | | | | | | | | | All it takes is the has_v4 flag to be set in gic_kvm_info as well as "kvm-arm.vgic_v4_enable=1" being passed on the command line for GICv4 to be enabled in KVM. Acked-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Prevent userspace from changing doorbell affinityMarc Zyngier2017-11-101-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We so far allocate the doorbell interrupts without taking any special measure regarding the affinity of these interrupts. We simply move them around as required when the vcpu gets scheduled on a different CPU. But that's counting without userspace (and the evil irqbalance) that can try and move the VPE interrupt around, causing the ITS code to emit VMOVP commands and remap the doorbell to another redistributor. Worse, this can happen while the vcpu is running, causing all kind of trouble if the VPE is already resident, and we end-up in UNPRED territory. So let's take a definitive action and prevent userspace from messing with us. This is just a matter of adding IRQ_NO_BALANCING to the set of flags we already have, letting the kernel in sole control of the affinity. Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Prevent a VM using GICv4 from being savedMarc Zyngier2017-11-101-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The GICv4 architecture doesn't make it easy for save/restore to work, as it doesn't give any guarantee that the pending state is written into the pending table. So let's not take any chance, and let's return an error if we encounter any LPI that has the HW bit set. In order for userspace to distinguish this error from other failure modes, use -EACCES as an error code. Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Enable virtual cpuif if VLPIs can be deliveredMarc Zyngier2017-11-101-3/+6
| | | | | | | | | | | | | | | | | | | | | | In order for VLPIs to be delivered to the guest, we must make sure that the virtual cpuif is always enabled, irrespective of the presence of virtual interrupt in the LRs. Acked-by: Christoffer Dall <cdall@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Hook vPE scheduling into vgic flush/syncMarc Zyngier2017-11-103-0/+45
| | | | | | | | | | | | | | | | | | | | | | | | The redistributor needs to be told which vPE is about to be run, and tells us whether there is any pending VLPI on exit. Let's add the scheduling calls to the vgic flush/sync functions, allowing the VLPIs to be delivered to the guest. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Use the doorbell interrupt as an unblocking sourceMarc Zyngier2017-11-102-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The doorbell interrupt is only useful if the vcpu is blocked on WFI. In all other cases, recieving a doorbell interrupt is just a waste of cycles. So let's only enable the doorbell if a vcpu is getting blocked, and disable it when it is unblocked. This is very similar to what we're doing for the background timer. Reviewed-by: Christoffer Dall <cdall@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Add doorbell interrupt handlingMarc Zyngier2017-11-101-0/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a vPE is not running, a VLPI being made pending results in a doorbell interrupt being delivered. Let's handle this interrupt and update the pending_last flag that indicates that VLPIs are pending. The corresponding vcpu is also kicked into action. Special care is taken to prevent the doorbell from being enabled at request time (this is controlled separately), and to make the disabling on the interrupt non-lazy. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Use pending_last as a scheduling hintMarc Zyngier2017-11-101-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | When a vPE exits, the pending_last flag is set when there are pending VLPIs stored in the pending table. Similarily, this flag will be set when a doorbell interrupt fires, as it indicates the same condition. Let's update kvm_vgic_vcpu_pending_irq() to account for that flag as well, making a vcpu runnable when set. Acked-by: Christoffer Dall <cdall@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Handle INVALL applied to a vPEMarc Zyngier2017-11-101-6/+9
| | | | | | | | | | | | | | | | | | | | | | There is no need to perform an INV for each interrupt when updating multiple interrupts. Instead, we can rely on the final VINVALL that gets sent to the ITS to do the work for all of them. Acked-by: Christoffer Dall <cdall@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Propagate property updates to VLPIsMarc Zyngier2017-11-101-0/+3
| | | | | | | | | | | | | | | | | | Upon updating a property, we propagate it all the way to the physical ITS, and ask for an INV command to be executed there. Acked-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Handle MOVALL applied to a vPEMarc Zyngier2017-11-101-9/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current implementation of MOVALL doesn't allow us to call into the core ITS code as we hold a number of spinlocks. Let's try a method used in other parts of the code, were we copy the intids of the candicate interrupts, and then do whatever we need to do with them outside of the critical section. This allows us to move the interrupts one by one, at the expense of a bit of CPU time. Who cares? MOVALL is such a stupid command anyway... Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Handle CLEAR applied to a VLPIMarc Zyngier2017-11-101-0/+4
| | | | | | | | | | | | | | | | | | | | Handling CLEAR is pretty easy. Just ask the ITS driver to clear the corresponding pending bit (which will turn into a CLEAR command on the physical side). Acked-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Propagate affinity changes to the physical ITSMarc Zyngier2017-11-101-1/+15
| | | | | | | | | | | | | | | | | | | | When the guest issues an affinity change, we need to tell the physical ITS that we're now targetting a new vcpu. This is done by extracting the current mapping, updating the target, and reapplying the mapping. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Unmap VLPI when freeing an LPIMarc Zyngier2017-11-101-1/+5
| | | | | | | | | | | | | | | | | | When freeing an LPI (on a DISCARD command, for example), we need to unmap the VLPI down to the physical ITS level. Acked-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Handle INT command applied to a VLPIMarc Zyngier2017-11-101-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | If the guest issues an INT command targetting a VLPI, let's call into the irq_set_irqchip_state() helper to make it pending on the physical side. This works just as well if userspace decides to inject an interrupt using the normal userspace API... Acked-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Wire mapping/unmapping of VLPIs in VFIO irq bypassMarc Zyngier2017-11-102-2/+108
| | | | | | | | | | | | | | | | | | | | Let's use the irq bypass mechanism also used for x86 posted interrupts to intercept the virtual PCIe endpoint configuration and establish our LPI->VLPI mapping. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Add init/teardown of the per-VM vPE irq domainMarc Zyngier2017-11-104-0/+102
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to control the GICv4 view of virtual CPUs, we rely on an irqdomain allocated for that purpose. Let's add a couple of helpers to that effect. At the same time, the vgic data structures gain new fields to track all this... erm... wonderful stuff. The way we hook into the vgic init is slightly convoluted. We need the vgic to be initialized (in order to guarantee that the number of vcpus is now fixed), and we must have a vITS (otherwise this is all very pointless). So we end-up calling the init from both vgic_init and vgic_its_create. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: GICv4: Add property field and per-VM predicateMarc Zyngier2017-11-102-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | Add a new has_gicv4 field in the global VGIC state that indicates whether the HW is GICv4 capable, as a per-VM predicate indicating if there is a possibility for a VM to support direct injection (the above being true and the VM having an ITS). Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: vITS: Add a helper to update the affinity of an LPIMarc Zyngier2017-11-101-9/+11
| | | | | | | | | | | | | | | | | | | | | | | | In order to help integrating the vITS code with GICv4, let's add a new helper that deals with updating the affinity of an LPI, which will later be augmented with super duper extra GICv4 goodness. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: vITS: Add MSI translation helpersMarc Zyngier2017-11-102-41/+58
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The whole MSI injection process is fairly monolithic. An MSI write gets turned into an injected LPI in one swift go. But this is actually a more fine-grained process: - First, a virtual ITS gets selected using the doorbell address - Then the DevID/EventID pair gets translated into an LPI - Finally the LPI is injected Since the GICv4 code needs the first two steps in order to match an IRQ routing entry to an LPI, let's expose them as helpers, and refactor the existing code to use them Reviewed-by: Christoffer Dall <cdall@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: vgic: Move kvm_vgic_destroy call aroundMarc Zyngier2017-11-061-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | The way we call kvm_vgic_destroy is a bit bizarre. We call it *after* having freed the vcpus, which sort of defeats the point of cleaning up things before that point. Let's move kvm_vgic_destroy towards the beginning of kvm_arch_destroy_vm, which seems more sensible. Acked-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: vgic: restructure kvm_vgic_(un)map_phys_irqEric Auger2017-11-062-38/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We want to reuse the core of the map/unmap functions for IRQ forwarding. Let's move the computation of the hwirq in kvm_vgic_map_phys_irq and pass the linux IRQ as parameter. the host_irq is added to struct vgic_irq. We introduce kvm_vgic_map/unmap_irq which take a struct vgic_irq handle as a parameter. Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: register irq bypass consumer on ARM/ARM64Eric Auger2017-11-061-0/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch selects IRQ_BYPASS_MANAGER and HAVE_KVM_IRQ_BYPASS configs for ARM/ARM64. kvm_arch_has_irq_bypass() now is implemented and returns true. As a consequence the irq bypass consumer will be registered for ARM/ARM64 with the forwarding callbacks: - stop/start: halt/resume guest execution - add/del_producer: set/unset forwarding at vgic/irqchip level We don't have any actual support yet, so nothing gets actually forwarded. Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Eric Auger <eric.auger@redhat.com> [maz: dropped the DEOI stuff for the time being in order to reduce the dependency chain, amended commit message] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
* | Merge tag 'kvm-4.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2017-11-1612-362/+670
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull KVM updates from Radim Krčmář: "First batch of KVM changes for 4.15 Common: - Python 3 support in kvm_stat - Accounting of slabs to kmemcg ARM: - Optimized arch timer handling for KVM/ARM - Improvements to the VGIC ITS code and introduction of an ITS reset ioctl - Unification of the 32-bit fault injection logic - More exact external abort matching logic PPC: - Support for running hashed page table (HPT) MMU mode on a host that is using the radix MMU mode; single threaded mode on POWER 9 is added as a pre-requisite - Resolution of merge conflicts with the last second 4.14 HPT fixes - Fixes and cleanups s390: - Some initial preparation patches for exitless interrupts and crypto - New capability for AIS migration - Fixes x86: - Improved emulation of LAPIC timer mode changes, MCi_STATUS MSRs, and after-reset state - Refined dependencies for VMX features - Fixes for nested SMI injection - A lot of cleanups" * tag 'kvm-4.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (89 commits) KVM: s390: provide a capability for AIS state migration KVM: s390: clear_io_irq() requests are not expected for adapter interrupts KVM: s390: abstract conversion between isc and enum irq_types KVM: s390: vsie: use common code functions for pinning KVM: s390: SIE considerations for AP Queue virtualization KVM: s390: document memory ordering for kvm_s390_vcpu_wakeup KVM: PPC: Book3S HV: Cosmetic post-merge cleanups KVM: arm/arm64: fix the incompatible matching for external abort KVM: arm/arm64: Unify 32bit fault injection KVM: arm/arm64: vgic-its: Implement KVM_DEV_ARM_ITS_CTRL_RESET KVM: arm/arm64: Document KVM_DEV_ARM_ITS_CTRL_RESET KVM: arm/arm64: vgic-its: Free caches when GITS_BASER Valid bit is cleared KVM: arm/arm64: vgic-its: New helper functions to free the caches KVM: arm/arm64: vgic-its: Remove kvm_its_unmap_device arm/arm64: KVM: Load the timer state when enabling the timer KVM: arm/arm64: Rework kvm_timer_should_fire KVM: arm/arm64: Get rid of kvm_timer_flush_hwstate KVM: arm/arm64: Avoid phys timer emulation in vcpu entry/exit KVM: arm/arm64: Move phys_timer_emulate function KVM: arm/arm64: Use kvm_arm_timer_set/get_reg for guest register traps ...
| * KVM: arm/arm64: Unify 32bit fault injectionMarc Zyngier2017-11-061-5/+92
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Both arm and arm64 implementations are capable of injecting faults, and yet have completely divergent implementations, leading to different bugs and reduced maintainability. Let's elect the arm64 version as the canonical one and move it into aarch32.c, which is common to both architectures. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: vgic-its: Implement KVM_DEV_ARM_ITS_CTRL_RESETEric Auger2017-11-061-49/+56
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On reset we clear the valid bits of GITS_CBASER and GITS_BASER<n>. We also clear command queue registers and free the cache (device, collection, and lpi lists). As we need to take the same locks as save/restore functions, we create a vgic_its_ctrl() wrapper that handles KVM_DEV_ARM_VGIC_GRP_CTRL group functions. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
| * KVM: arm/arm64: vgic-its: Free caches when GITS_BASER Valid bit is clearedEric Auger2017-11-061-4/+18
| | | | | | | | | | | | | | | | | | | | | | | | When the GITS_BASER<n>.Valid gets cleared, the data structures in guest RAM are not valid anymore. The device, collection and LPI lists stored in the in-kernel ITS represent the same information in some form of cache. So let's void the cache. Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-23 05:33:50 +0200