arm: Get rid of the ARM_VCPU_FEATURE_FLAGS() macro

The ARM_VCPU_FEATURE_FLAGS() macro sets a feature bit in a rather
convoluted way: if cpu_id is 0, then bit KVM_ARM_VCPU_POWER_OFF is 0,
otherwise i

arm: Get rid of the ARM_VCPU_FEATURE_FLAGS() macro

The ARM_VCPU_FEATURE_FLAGS() macro sets a feature bit in a rather
convoluted way: if cpu_id is 0, then bit KVM_ARM_VCPU_POWER_OFF is 0,
otherwise is set to 1. There's really no need for this indirection,
especially considering that the macro has been changed to return the same
value for both the arm and arm64 architectures. Replace it with a simple
conditional statement in kvm_cpu__arch_init(), which makes it clearer to
understand.

Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Link: https://lore.kernel.org/r/20220412133231.35355-6-alexandru.elisei@arm.com
Signed-off-by: Will Deacon <will@kernel.org>

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aarch64: Add stolen time support

This patch adds support for stolen time by sharing a memory region
with the guest which will be used by the hypervisor to store the stolen
time information. Reserve

aarch64: Add stolen time support

This patch adds support for stolen time by sharing a memory region
with the guest which will be used by the hypervisor to store the stolen
time information. Reserve a 64kb MMIO memory region after the RTC peripheral
to be used by pvtime. The exact format of the structure stored by the
hypervisor is described in the ARM DEN0057A document.

Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Tested-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Sebastian Ene <sebastianene@google.com>
Link: https://lore.kernel.org/r/20220313161949.3565171-3-sebastianene@google.com
Signed-off-by: Will Deacon <will@kernel.org>

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arm64: Add SVE support

This patch enables the Scalable Vector Extension for the guest when
the host supports it.

This requires use of the new KVM_ARM_VCPU_FINALIZE ioctl before the
vcpu is runnable

arm64: Add SVE support

This patch enables the Scalable Vector Extension for the guest when
the host supports it.

This requires use of the new KVM_ARM_VCPU_FINALIZE ioctl before the
vcpu is runnable, so a new hook kvm_cpu__configure_features() is
added to provide an appropriate place to do this work.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>

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arm/arm64: Factor out ptrauth vcpu feature setup

In the interest of readability, factor out the vcpu feature setup
for ptrauth into a separate function.

Also, because aarch32 doesn't have this feat

arm/arm64: Factor out ptrauth vcpu feature setup

In the interest of readability, factor out the vcpu feature setup
for ptrauth into a separate function.

Also, because aarch32 doesn't have this feature or the related
command line options anyway, move the actual code into aarch64/.

Since ARM_VCPU_PTRAUTH_FEATURE is only there to make the ptrauth
feature setup code compile on arm, it is no longer needed: inline
and remove it.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>

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KVM: arm/arm64: Add a vcpu feature for pointer authentication

This patch adds a runtime capabality for KVM tool to enable Arm64 8.3
Pointer Authentication in guest kernel. Two vcpu features
KVM_ARM_

KVM: arm/arm64: Add a vcpu feature for pointer authentication

This patch adds a runtime capabality for KVM tool to enable Arm64 8.3
Pointer Authentication in guest kernel. Two vcpu features
KVM_ARM_VCPU_PTRAUTH_[ADDRESS/GENERIC] are supplied together to enable
Pointer Authentication in KVM guest after checking the capability.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
Signed-off-by: Dave Martin <Dave.Martin@arm.com> [merge new kernel heaers]
Signed-off-by: Will Deacon <will@kernel.org>

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kvm tools: arm: emit the MPIDR in DT instead of cpu_id

kvmtools uses the virtual CPU number to emit the DT CPU nodes.
While this is correct for a flat topology, it fails on anything
else, as the gue

kvm tools: arm: emit the MPIDR in DT instead of cpu_id

kvmtools uses the virtual CPU number to emit the DT CPU nodes.
While this is correct for a flat topology, it fails on anything
else, as the guest expects to find the MPIDR there.

The fix is to ask the kernel for each vcpu MPIDR, and emit this
instead.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm tools: arm: add support for PSCI firmware in place of spin-tables

ARM has recently published a document describing a firmware interface
for CPU power management, which can be used for booting se

kvm tools: arm: add support for PSCI firmware in place of spin-tables

ARM has recently published a document describing a firmware interface
for CPU power management, which can be used for booting secondary cores
on an SMP platform, amongst other things. As part of the mach-virt
upstreaming for the kernel (that is, the virtual platform targetted by
kvmtool), it was suggested that we use this interface instead of the
current spin-table based approach.

This patch implements PSCI support in kvmtool for ARM, removing a fair
amount of code in the process.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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