linux-stable.git/include/kvm, branch linux-4.15.y

KVM: arm/arm64: Reset mapped IRQs on VM reset

2018-03-21T11:05:44+00:00

commit 413aa807ae39fed7e387c175d2d0ae9fcf6c0c9d upstream.

We currently don't allow resetting mapped IRQs from userspace, because
their state is controlled by the hardware.  But we do need to reset the
state when the VM is reset, so we provide a function for the 'owner' of
the mapped interrupt to reset the interrupt state.

Currently only the timer uses mapped interrupts, so we call this
function from the timer reset logic.

Cc: stable@vger.kernel.org
Fixes: 4c60e360d6df ("KVM: arm/arm64: Provide a get_input_level for the arch timer")
Signed-off-by: Christoffer Dall 
Signed-off-by: Marc Zyngier 
Signed-off-by: Greg Kroah-Hartman

arm/arm64: KVM: Turn kvm_psci_version into a static inline

2018-02-16T19:06:43+00:00

Commit a4097b351118 upstream.

We're about to need kvm_psci_version in HYP too. So let's turn it
into a static inline, and pass the kvm structure as a second
parameter (so that HYP can do a kern_hyp_va on it).

Tested-by: Ard Biesheuvel 
Reviewed-by: Christoffer Dall 
Signed-off-by: Marc Zyngier 
Signed-off-by: Catalin Marinas 
Signed-off-by: Will Deacon 
Signed-off-by: Greg Kroah-Hartman

arm/arm64: KVM: Advertise SMCCC v1.1

2018-02-16T19:06:43+00:00

Commit 09e6be12effd upstream.

The new SMC Calling Convention (v1.1) allows for a reduced overhead
when calling into the firmware, and provides a new feature discovery
mechanism.

Make it visible to KVM guests.

Tested-by: Ard Biesheuvel 
Reviewed-by: Christoffer Dall 
Signed-off-by: Marc Zyngier 
Signed-off-by: Catalin Marinas 
Signed-off-by: Will Deacon 
Signed-off-by: Greg Kroah-Hartman

arm/arm64: KVM: Implement PSCI 1.0 support

2018-02-16T19:06:42+00:00

Commit 58e0b2239a4d upstream.

PSCI 1.0 can be trivially implemented by providing the FEATURES
call on top of PSCI 0.2 and returning 1.0 as the PSCI version.

We happily ignore everything else, as they are either optional or
are clarifications that do not require any additional change.

PSCI 1.0 is now the default until we decide to add a userspace
selection API.

Reviewed-by: Christoffer Dall 
Tested-by: Ard Biesheuvel 
Signed-off-by: Marc Zyngier 
Signed-off-by: Catalin Marinas 
Signed-off-by: Will Deacon 
Signed-off-by: Greg Kroah-Hartman

arm/arm64: KVM: Add PSCI_VERSION helper

2018-02-16T19:06:42+00:00

Commit d0a144f12a7c upstream.

As we're about to trigger a PSCI version explosion, it doesn't
hurt to introduce a PSCI_VERSION helper that is going to be
used everywhere.

Reviewed-by: Christoffer Dall 
Tested-by: Ard Biesheuvel 
Signed-off-by: Marc Zyngier 
Signed-off-by: Catalin Marinas 
Signed-off-by: Will Deacon 
Signed-off-by: Greg Kroah-Hartman

arm/arm64: KVM: Consolidate the PSCI include files

2018-02-16T19:06:42+00:00

Commit 1a2fb94e6a77 upstream.

As we're about to update the PSCI support, and because I'm lazy,
let's move the PSCI include file to include/kvm so that both
ARM architectures can find it.

Acked-by: Christoffer Dall 
Tested-by: Ard Biesheuvel 
Signed-off-by: Marc Zyngier 
Signed-off-by: Catalin Marinas 
Signed-off-by: Will Deacon 
Signed-off-by: Greg Kroah-Hartman

KVM: arm/arm64: timer: Don't set irq as forwarded if no usable GIC

2017-12-18T09:53:23+00:00

If we don't have a usable GIC, do not try to set the vcpu affinity
as this is guaranteed to fail.

Reported-by: Andre Przywara 
Reviewed-by: Andre Przywara 
Tested-by: Andre Przywara 
Reviewed-by: Christoffer Dall 
Signed-off-by: Marc Zyngier 
Signed-off-by: Christoffer Dall

KVM: arm/arm64: Don't enable/disable physical timer access on VHE

2017-11-29T15:46:09+00:00

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 
Signed-off-by: Christoffer Dall

KVM: arm/arm64: GICv4: Use the doorbell interrupt as an unblocking source

2017-11-10T08:43:22+00:00

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 
Reviewed-by: Eric Auger 
Signed-off-by: Marc Zyngier 
Signed-off-by: Christoffer Dall

KVM: arm/arm64: GICv4: Wire mapping/unmapping of VLPIs in VFIO irq bypass

2017-11-10T08:28:52+00:00

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 
Signed-off-by: Marc Zyngier 
Signed-off-by: Christoffer Dall