linux-toradex.git/arch/powerpc/include/asm/kvm_ppc.h, branch v3.13.9

kvm: powerpc: book3s: drop is_hv_enabled

2013-10-17T16:43:34+00:00

drop is_hv_enabled, because that should not be a callback property

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Alexander Graf

kvm: powerpc: book3s: Allow the HV and PR selection per virtual machine

2013-10-17T16:42:36+00:00

This moves the kvmppc_ops callbacks to be a per VM entity. This
enables us to select HV and PR mode when creating a VM. We also
allow both kvm-hv and kvm-pr kernel module to be loaded. To
achieve this we move /dev/kvm ownership to kvm.ko module. Depending on
which KVM mode we select during VM creation we take a reference
count on respective module

Signed-off-by: Aneesh Kumar K.V 
[agraf: fix coding style]
Signed-off-by: Alexander Graf

kvm: Add struct kvm arg to memslot APIs

2013-10-17T13:49:23+00:00

We will use that in the later patch to find the kvm ops handler

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Alexander Graf

kvm: powerpc: book3s: Add is_hv_enabled to kvmppc_ops

2013-10-17T13:29:09+00:00

This help us to identify whether we are running with hypervisor mode KVM
enabled. The change is needed so that we can have both HV and PR kvm
enabled in the same kernel.

If both HV and PR KVM are included, interrupts come in to the HV version
of the kvmppc_interrupt code, which then jumps to the PR handler,
renamed to kvmppc_interrupt_pr, if the guest is a PR guest.

Allowing both PR and HV in the same kernel required some changes to
kvm_dev_ioctl_check_extension(), since the values returned now can't
be selected with #ifdefs as much as previously. We look at is_hv_enabled
to return the right value when checking for capabilities.For capabilities that
are only provided by HV KVM, we return the HV value only if
is_hv_enabled is true. For capabilities provided by PR KVM but not HV,
we return the PR value only if is_hv_enabled is false.

NOTE: in later patch we replace is_hv_enabled with a static inline
function comparing kvm_ppc_ops

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Alexander Graf

kvm: powerpc: Add kvmppc_ops callback

2013-10-17T13:24:26+00:00

This patch add a new callback kvmppc_ops. This will help us in enabling
both HV and PR KVM together in the same kernel. The actual change to
enable them together is done in the later patch in the series.

Signed-off-by: Aneesh Kumar K.V 
[agraf: squash in booke changes]
Signed-off-by: Alexander Graf

kvm: powerpc: book3s: Add a new config variable CONFIG_KVM_BOOK3S_HV_POSSIBLE

2013-10-17T13:18:28+00:00

This help ups to select the relevant code in the kernel code
when we later move HV and PR bits as seperate modules. The patch
also makes the config options for PR KVM selectable

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Alexander Graf

kvm/ppc: Call trace_hardirqs_on before entry

2013-07-10T22:51:28+00:00

Currently this is only being done on 64-bit.  Rather than just move it
out of the 64-bit ifdef, move it to kvm_lazy_ee_enable() so that it is
consistent with lazy ee state, and so that we don't track more host
code as interrupts-enabled than necessary.

Rename kvm_lazy_ee_enable() to kvm_fix_ee_before_entry() to reflect
that this function now has a role on 32-bit as well.

Signed-off-by: Scott Wood 
Signed-off-by: Alexander Graf

powerpc/kvm: Contiguous memory allocator based RMA allocation

2013-07-08T14:20:20+00:00

Older version of power architecture use Real Mode Offset register and Real Mode Limit
Selector for mapping guest Real Mode Area. The guest RMA should be physically
contigous since we use the range when address translation is not enabled.

This patch switch RMA allocation code to use contigous memory allocator. The patch
also remove the the linear allocator which not used any more

Acked-by: Paul Mackerras 
Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Alexander Graf

powerpc/kvm: Contiguous memory allocator based hash page table allocation

2013-07-08T14:19:58+00:00

Powerpc architecture uses a hash based page table mechanism for mapping virtual
addresses to physical address. The architecture require this hash page table to
be physically contiguous. With KVM on Powerpc currently we use early reservation
mechanism for allocating guest hash page table. This implies that we need to
reserve a big memory region to ensure we can create large number of guest
simultaneously with KVM on Power. Another disadvantage is that the reserved memory
is not available to rest of the subsystems and and that implies we limit the total
available memory in the host.

This patch series switch the guest hash page table allocation to use
contiguous memory allocator.

Signed-off-by: Aneesh Kumar K.V 
Acked-by: Paul Mackerras 
Signed-off-by: Alexander Graf

KVM: PPC: Book3S: Add API for in-kernel XICS emulation

2013-05-02T13:28:36+00:00

This adds the API for userspace to instantiate an XICS device in a VM
and connect VCPUs to it.  The API consists of a new device type for
the KVM_CREATE_DEVICE ioctl, a new capability KVM_CAP_IRQ_XICS, which
functions similarly to KVM_CAP_IRQ_MPIC, and the KVM_IRQ_LINE ioctl,
which is used to assert and deassert interrupt inputs of the XICS.

The XICS device has one attribute group, KVM_DEV_XICS_GRP_SOURCES.
Each attribute within this group corresponds to the state of one
interrupt source.  The attribute number is the same as the interrupt
source number.

This does not support irq routing or irqfd yet.

Signed-off-by: Paul Mackerras 
Acked-by: David Gibson 
Signed-off-by: Alexander Graf