linux-toradex.git/arch/powerpc/include/asm/kvm_host.h, branch v3.10.92

KVM: PPC: Book3S: Add kernel emulation for the XICS interrupt controller

2013-04-26T18:27:30+00:00

This adds in-kernel emulation of the XICS (eXternal Interrupt
Controller Specification) interrupt controller specified by PAPR, for
both HV and PR KVM guests.

The XICS emulation supports up to 1048560 interrupt sources.
Interrupt source numbers below 16 are reserved; 0 is used to mean no
interrupt and 2 is used for IPIs.  Internally these are represented in
blocks of 1024, called ICS (interrupt controller source) entities, but
that is not visible to userspace.

Each vcpu gets one ICP (interrupt controller presentation) entity,
used to store the per-vcpu state such as vcpu priority, pending
interrupt state, IPI request, etc.

This does not include any API or any way to connect vcpus to their
ICP state; that will be added in later patches.

This is based on an initial implementation by Michael Ellerman
 reworked by Benjamin Herrenschmidt and
Paul Mackerras.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras 
[agraf: fix typo, add dependency on !KVM_MPIC]
Signed-off-by: Alexander Graf

KVM: PPC: Book3S: Add infrastructure to implement kernel-side RTAS calls

2013-04-26T18:27:29+00:00

For pseries machine emulation, in order to move the interrupt
controller code to the kernel, we need to intercept some RTAS
calls in the kernel itself.  This adds an infrastructure to allow
in-kernel handlers to be registered for RTAS services by name.
A new ioctl, KVM_PPC_RTAS_DEFINE_TOKEN, then allows userspace to
associate token values with those service names.  Then, when the
guest requests an RTAS service with one of those token values, it
will be handled by the relevant in-kernel handler rather than being
passed up to userspace as at present.

Signed-off-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras 
[agraf: fix warning]
Signed-off-by: Alexander Graf

KVM: PPC: Support irq routing and irqfd for in-kernel MPIC

2013-04-26T18:27:25+00:00

Now that all the irq routing and irqfd pieces are generic, we can expose
real irqchip support to all of KVM's internal helpers.

This allows us to use irqfd with the in-kernel MPIC.

Signed-off-by: Alexander Graf

kvm/ppc/mpic: add KVM_CAP_IRQ_MPIC

2013-04-26T18:27:24+00:00

Enabling this capability connects the vcpu to the designated in-kernel
MPIC.  Using explicit connections between vcpus and irqchips allows
for flexibility, but the main benefit at the moment is that it
simplifies the code -- KVM doesn't need vm-global state to remember
which MPIC object is associated with this vm, and it doesn't need to
care about ordering between irqchip creation and vcpu creation.

Signed-off-by: Scott Wood 
[agraf: add stub functions for kvmppc_mpic_{dis,}connect_vcpu]
Signed-off-by: Alexander Graf

kvm/ppc/mpic: in-kernel MPIC emulation

2013-04-26T18:27:23+00:00

Hook the MPIC code up to the KVM interfaces, add locking, etc.

Signed-off-by: Scott Wood 
[agraf: add stub function for kvmppc_mpic_set_epr, non-booke, 64bit]
Signed-off-by: Alexander Graf

KVM: PPC: Book3S HV: Report VPA and DTL modifications in dirty map

2013-04-26T18:27:13+00:00

At present, the KVM_GET_DIRTY_LOG ioctl doesn't report modifications
done by the host to the virtual processor areas (VPAs) and dispatch
trace logs (DTLs) registered by the guest.  This is because those
modifications are done either in real mode or in the host kernel
context, and in neither case does the access go through the guest's
HPT, and thus no change (C) bit gets set in the guest's HPT.

However, the changes done by the host do need to be tracked so that
the modified pages get transferred when doing live migration.  In
order to track these modifications, this adds a dirty flag to the
struct representing the VPA/DTL areas, and arranges to set the flag
when the VPA/DTL gets modified by the host.  Then, when we are
collecting the dirty log, we also check the dirty flags for the
VPA and DTL for each vcpu and set the relevant bit in the dirty log
if necessary.  Doing this also means we now need to keep track of
the guest physical address of the VPA/DTL areas.

So as not to lose track of modifications to a VPA/DTL area when it gets
unregistered, or when a new area gets registered in its place, we need
to transfer the dirty state to the rmap chain.  This adds code to
kvmppc_unpin_guest_page() to do that if the area was dirty.  To simplify
that code, we now require that all VPA, DTL and SLB shadow buffer areas
fit within a single host page.  Guests already comply with this
requirement because pHyp requires that these areas not cross a 4k
boundary.

Signed-off-by: Paul Mackerras 
Signed-off-by: Alexander Graf

KVM: PPC: e500: Add support for EPTCFG register

2013-04-26T18:27:08+00:00

EPTCFG register defined by E.PT is accessed unconditionally by Linux guests
in the presence of MAV 2.0. Emulate it now.

Signed-off-by: Mihai Caraman 
Signed-off-by: Alexander Graf

KVM: PPC: e500: Add support for TLBnPS registers

2013-04-26T18:27:07+00:00

Add support for TLBnPS registers available in MMU Architecture Version
(MAV) 2.0.

Signed-off-by: Mihai Caraman 
Signed-off-by: Alexander Graf

KVM: PPC: booke: Added debug handler

2013-03-22T00:21:09+00:00

Installed debug handler will be used for guest debug support
and debug facility emulation features (patches for these
features will follow this patch).

Signed-off-by: Liu Yu 
[bharat.bhushan@freescale.com: Substantial changes]
Signed-off-by: Bharat Bhushan 
Signed-off-by: Alexander Graf

Merge tag 'kvm-3.9-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2013-02-24T21:07:18+00:00

Pull KVM updates from Marcelo Tosatti:
 "KVM updates for the 3.9 merge window, including x86 real mode
  emulation fixes, stronger memory slot interface restrictions, mmu_lock
  spinlock hold time reduction, improved handling of large page faults
  on shadow, initial APICv HW acceleration support, s390 channel IO
  based virtio, amongst others"

* tag 'kvm-3.9-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (143 commits)
  Revert "KVM: MMU: lazily drop large spte"
  x86: pvclock kvm: align allocation size to page size
  KVM: nVMX: Remove redundant get_vmcs12 from nested_vmx_exit_handled_msr
  x86 emulator: fix parity calculation for AAD instruction
  KVM: PPC: BookE: Handle alignment interrupts
  booke: Added DBCR4 SPR number
  KVM: PPC: booke: Allow multiple exception types
  KVM: PPC: booke: use vcpu reference from thread_struct
  KVM: Remove user_alloc from struct kvm_memory_slot
  KVM: VMX: disable apicv by default
  KVM: s390: Fix handling of iscs.
  KVM: MMU: cleanup __direct_map
  KVM: MMU: remove pt_access in mmu_set_spte
  KVM: MMU: cleanup mapping-level
  KVM: MMU: lazily drop large spte
  KVM: VMX: cleanup vmx_set_cr0().
  KVM: VMX: add missing exit names to VMX_EXIT_REASONS array
  KVM: VMX: disable SMEP feature when guest is in non-paging mode
  KVM: Remove duplicate text in api.txt
  Revert "KVM: MMU: split kvm_mmu_free_page"
  ...