user/sven/linux.git/Documentation/virtual, branch v3.18.94

KVM: PPC: Book3S HV: Save/restore XER in checkpointed register state

2017-01-15T14:49:49Z

[ Upstream commit 0d808df06a44200f52262b6eb72bcb6042f5a7c5 ] When switching from/to a guest that has a transaction in progress, we need to save/restore the checkpointed register state. Although XER is part of the CPU state that gets checkpointed, the code that does this saving and restoring doesn't save/restore XER. This fixes it by saving and restoring the XER. To allow userspace to read/write the checkpointed XER value, we also add a new ONE_REG specifier. The visible effect of this bug is that the guest may see its XER value being corrupted when it uses transactions. Fixes: e4e38121507a ("KVM: PPC: Book3S HV: Add transactional memory support") Fixes: 0a8eccefcb34 ("KVM: PPC: Book3S HV: Add missing code for transaction reclaim on guest exit") Cc: stable@vger.kernel.org # v3.15+ Signed-off-by: Paul Mackerras Reviewed-by: Thomas Huth Signed-off-by: Paul Mackerras Signed-off-by: Sasha Levin

KVM: MMU: fix SMAP virtualization

2015-06-09T17:43:48Z

[ Upstream commit 0be0226f07d14b153a5eedf2bb86e1eb7dcefab5 ] KVM may turn a user page to a kernel page when kernel writes a readonly user page if CR0.WP = 1. This shadow page entry will be reused after SMAP is enabled so that kernel is allowed to access this user page Fix it by setting SMAP && !CR0.WP into shadow page's role and reset mmu once CR4.SMAP is updated Signed-off-by: Xiao Guangrong Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini Signed-off-by: Sasha Levin

KVM: s390: fix get_all_floating_irqs

2015-05-17T23:11:49Z

[ Upstream commit 94aa033efcac47b09db22cb561e135baf37b7887 ] This fixes a bug introduced with commit c05c4186bbe4 ("KVM: s390: add floating irq controller"). get_all_floating_irqs() does copy_to_user() while holding a spin lock. Let's fix this by filling a temporary buffer first and copy it to userspace after giving up the lock. Cc: # 3.18+: 69a8d4562638 KVM: s390: no need to hold... Reviewed-by: David Hildenbrand Signed-off-by: Jens Freimann Signed-off-by: Christian Borntraeger Acked-by: Cornelia Huck Signed-off-by: Sasha Levin

arm/arm64: KVM: Turn off vcpus on PSCI shutdown/reboot

2015-05-11T11:07:32Z

commit cf5d318865e25f887d49a0c6083bbc6dcd1905b1 upstream. When a vcpu calls SYSTEM_OFF or SYSTEM_RESET with PSCI v0.2, the vcpus should really be turned off for the VM adhering to the suggestions in the PSCI spec, and it's the sane thing to do. Also, clarify the behavior and expectations for exits to user space with the KVM_EXIT_SYSTEM_EVENT case. Acked-by: Marc Zyngier Signed-off-by: Christoffer Dall Signed-off-by: Shannon Zhao Signed-off-by: Sasha Levin

arm/arm64: KVM: Correct KVM_ARM_VCPU_INIT power off option

2015-05-11T11:07:31Z

commit 3ad8b3de526a76fbe9466b366059e4958957b88f upstream. The implementation of KVM_ARM_VCPU_INIT is currently not doing what userspace expects, namely making sure that a vcpu which may have been turned off using PSCI is returned to its initial state, which would be powered on if userspace does not set the KVM_ARM_VCPU_POWER_OFF flag. Implement the expected functionality and clarify the ABI. Acked-by: Marc Zyngier Signed-off-by: Christoffer Dall Signed-off-by: Shannon Zhao Signed-off-by: Sasha Levin

Merge tag 'kvm-arm-for-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-next

2014-09-27T09:03:33Z

Changes for KVM for arm/arm64 for 3.18 This includes a bunch of changes: - Support read-only memory slots on arm/arm64 - Various changes to fix Sparse warnings - Correctly detect write vs. read Stage-2 faults - Various VGIC cleanups and fixes - Dynamic VGIC data strcuture sizing - Fix SGI set_clear_pend offset bug - Fix VTTBR_BADDR Mask - Correctly report the FSC on Stage-2 faults Conflicts: virt/kvm/eventfd.c [duplicate, different patch where the kvm-arm version broke x86. The kvm tree instead has the right one]

KVM: PPC: BOOKE: Add one_reg documentation of SPRG9 and DBSR

2014-09-22T08:11:32Z

This was missed in respective one_reg implementation patch. Signed-off-by: Bharat Bhushan Signed-off-by: Alexander Graf

arm/arm64: KVM: vgic: make number of irqs a configurable attribute

2014-09-19T01:48:58Z

In order to make the number of interrupts configurable, use the new fancy device management API to add KVM_DEV_ARM_VGIC_GRP_NR_IRQS as a VGIC configurable attribute. Userspace can now specify the exact size of the GIC (by increments of 32 interrupts). Reviewed-by: Christoffer Dall Signed-off-by: Marc Zyngier

KVM: fix api documentation of KVM_GET_EMULATED_CPUID

2014-09-10T09:34:39Z

It looks like when this was initially merged it got accidentally included in the following section. I've just moved it back in the correct section and re-numbered it as other ioctls have been added since. Signed-off-by: Alex BennÃ©e Acked-by: Borislav Petkov Signed-off-by: Paolo Bonzini

KVM: document KVM_SET_GUEST_DEBUG api

2014-09-10T09:33:12Z

In preparation for working on the ARM implementation I noticed the debug interface was missing from the API document. I've pieced together the expected behaviour from the code and commit messages written it up as best I can. Signed-off-by: Alex BennÃ©e Signed-off-by: Paolo Bonzini