Merge drm/drm-fixes into drm-misc-fixes

Forwarding to v6.6-rc1.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
"ARM:

- Clean up vCPU targets, always returning generic v8 as the preferred
target

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
"ARM:

- Clean up vCPU targets, always returning generic v8 as the preferred
target

- Trap forwarding infrastructure for nested virtualization (used for
traps that are taken from an L2 guest and are needed by the L1
hypervisor)

- FEAT_TLBIRANGE support to only invalidate specific ranges of
addresses when collapsing a table PTE to a block PTE. This avoids
that the guest refills the TLBs again for addresses that aren't
covered by the table PTE.

- Fix vPMU issues related to handling of PMUver.

- Don't unnecessary align non-stack allocations in the EL2 VA space

- Drop HCR_VIRT_EXCP_MASK, which was never used...

- Don't use smp_processor_id() in kvm_arch_vcpu_load(), but the cpu
parameter instead

- Drop redundant call to kvm_set_pfn_accessed() in user_mem_abort()

- Remove prototypes without implementations

RISC-V:

- Zba, Zbs, Zicntr, Zicsr, Zifencei, and Zihpm support for guest

- Added ONE_REG interface for SATP mode

- Added ONE_REG interface to enable/disable multiple ISA extensions

- Improved error codes returned by ONE_REG interfaces

- Added KVM_GET_REG_LIST ioctl() implementation for KVM RISC-V

- Added get-reg-list selftest for KVM RISC-V

s390:

- PV crypto passthrough enablement (Tony, Steffen, Viktor, Janosch)

Allows a PV guest to use crypto cards. Card access is governed by
the firmware and once a crypto queue is "bound" to a PV VM every
other entity (PV or not) looses access until it is not bound
anymore. Enablement is done via flags when creating the PV VM.

- Guest debug fixes (Ilya)

x86:

- Clean up KVM's handling of Intel architectural events

- Intel bugfixes

- Add support for SEV-ES DebugSwap, allowing SEV-ES guests to use
debug registers and generate/handle #DBs

- Clean up LBR virtualization code

- Fix a bug where KVM fails to set the target pCPU during an IRTE
update

- Fix fatal bugs in SEV-ES intrahost migration

- Fix a bug where the recent (architecturally correct) change to
reinject #BP and skip INT3 broke SEV guests (can't decode INT3 to
skip it)

- Retry APIC map recalculation if a vCPU is added/enabled

- Overhaul emergency reboot code to bring SVM up to par with VMX, tie
the "emergency disabling" behavior to KVM actually being loaded,
and move all of the logic within KVM

- Fix user triggerable WARNs in SVM where KVM incorrectly assumes the
TSC ratio MSR cannot diverge from the default when TSC scaling is
disabled up related code

- Add a framework to allow "caching" feature flags so that KVM can
check if the guest can use a feature without needing to search
guest CPUID

- Rip out the ancient MMU_DEBUG crud and replace the useful bits with
CONFIG_KVM_PROVE_MMU

- Fix KVM's handling of !visible guest roots to avoid premature
triple fault injection

- Overhaul KVM's page-track APIs, and KVMGT's usage, to reduce the
API surface that is needed by external users (currently only
KVMGT), and fix a variety of issues in the process

Generic:

- Wrap kvm_{gfn,hva}_range.pte in a union to allow mmu_notifier
events to pass action specific data without needing to constantly
update the main handlers.

- Drop unused function declarations

Selftests:

- Add testcases to x86's sync_regs_test for detecting KVM TOCTOU bugs

- Add support for printf() in guest code and covert all guest asserts
to use printf-based reporting

- Clean up the PMU event filter test and add new testcases

- Include x86 selftests in the KVM x86 MAINTAINERS entry"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (279 commits)
KVM: x86/mmu: Include mmu.h in spte.h
KVM: x86/mmu: Use dummy root, backed by zero page, for !visible guest roots
KVM: x86/mmu: Disallow guest from using !visible slots for page tables
KVM: x86/mmu: Harden TDP MMU iteration against root w/o shadow page
KVM: x86/mmu: Harden new PGD against roots without shadow pages
KVM: x86/mmu: Add helper to convert root hpa to shadow page
drm/i915/gvt: Drop final dependencies on KVM internal details
KVM: x86/mmu: Handle KVM bookkeeping in page-track APIs, not callers
KVM: x86/mmu: Drop @slot param from exported/external page-track APIs
KVM: x86/mmu: Bug the VM if write-tracking is used but not enabled
KVM: x86/mmu: Assert that correct locks are held for page write-tracking
KVM: x86/mmu: Rename page-track APIs to reflect the new reality
KVM: x86/mmu: Drop infrastructure for multiple page-track modes
KVM: x86/mmu: Use page-track notifiers iff there are external users
KVM: x86/mmu: Move KVM-only page-track declarations to internal header
KVM: x86: Remove the unused page-track hook track_flush_slot()
drm/i915/gvt: switch from ->track_flush_slot() to ->track_remove_region()
KVM: x86: Add a new page-track hook to handle memslot deletion
drm/i915/gvt: Don't bother removing write-protection on to-be-deleted slot
KVM: x86: Reject memslot MOVE operations if KVMGT is attached
...

show more ...

Merge tag 'kvmarm-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 updates for Linux 6.6

- Add support for TLB range invalidation of Stage-2 page tables,
av

Merge tag 'kvmarm-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 updates for Linux 6.6

- Add support for TLB range invalidation of Stage-2 page tables,
avoiding unnecessary invalidations. Systems that do not implement
range invalidation still rely on a full invalidation when dealing
with large ranges.

- Add infrastructure for forwarding traps taken from a L2 guest to
the L1 guest, with L0 acting as the dispatcher, another baby step
towards the full nested support.

- Simplify the way we deal with the (long deprecated) 'CPU target',
resulting in a much needed cleanup.

- Fix another set of PMU bugs, both on the guest and host sides,
as we seem to never have any shortage of those...

- Relax the alignment requirements of EL2 VA allocations for
non-stack allocations, as we were otherwise wasting a lot of that
precious VA space.

- The usual set of non-functional cleanups, although I note the lack
of spelling fixes...

show more ...

Merge branch kvm-arm64/nv-trap-forwarding into kvmarm-master/next

* kvm-arm64/nv-trap-forwarding: (30 commits)
: .
: This implements the so called "trap forwarding" infrastructure, which
: get

Merge branch kvm-arm64/nv-trap-forwarding into kvmarm-master/next

* kvm-arm64/nv-trap-forwarding: (30 commits)
: .
: This implements the so called "trap forwarding" infrastructure, which
: gets used when we take a trap from an L2 guest and that the L1 guest
: wants to see the trap for itself.
: .
KVM: arm64: nv: Add trap description for SPSR_EL2 and ELR_EL2
KVM: arm64: nv: Select XARRAY_MULTI to fix build error
KVM: arm64: nv: Add support for HCRX_EL2
KVM: arm64: Move HCRX_EL2 switch to load/put on VHE systems
KVM: arm64: nv: Expose FGT to nested guests
KVM: arm64: nv: Add switching support for HFGxTR/HDFGxTR
KVM: arm64: nv: Expand ERET trap forwarding to handle FGT
KVM: arm64: nv: Add SVC trap forwarding
KVM: arm64: nv: Add trap forwarding for HDFGxTR_EL2
KVM: arm64: nv: Add trap forwarding for HFGITR_EL2
KVM: arm64: nv: Add trap forwarding for HFGxTR_EL2
KVM: arm64: nv: Add fine grained trap forwarding infrastructure
KVM: arm64: nv: Add trap forwarding for CNTHCTL_EL2
KVM: arm64: nv: Add trap forwarding for MDCR_EL2
KVM: arm64: nv: Expose FEAT_EVT to nested guests
KVM: arm64: nv: Add trap forwarding for HCR_EL2
KVM: arm64: nv: Add trap forwarding infrastructure
KVM: arm64: Restructure FGT register switching
KVM: arm64: nv: Add FGT registers
KVM: arm64: Add missing HCR_EL2 trap bits
...

Signed-off-by: Marc Zyngier <maz@kernel.org>

show more ...

KVM: arm64: nv: Add support for HCRX_EL2

HCRX_EL2 has an interesting effect on HFGITR_EL2, as it conditions
the traps of TLBI*nXS.

Expand the FGT support to add a new Fine Grained Filter that will

KVM: arm64: nv: Add support for HCRX_EL2

HCRX_EL2 has an interesting effect on HFGITR_EL2, as it conditions
the traps of TLBI*nXS.

Expand the FGT support to add a new Fine Grained Filter that will
get checked when the instruction gets trapped, allowing the shadow
register to override the trap as needed.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-29-maz@kernel.org

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KVM: arm64: nv: Expose FGT to nested guests

Now that we have FGT support, expose the feature to NV guests.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.or

KVM: arm64: nv: Expose FGT to nested guests

Now that we have FGT support, expose the feature to NV guests.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Link: https://lore.kernel.org/r/20230815183903.2735724-27-maz@kernel.org

show more ...

KVM: arm64: nv: Expose FEAT_EVT to nested guests

Now that we properly implement FEAT_EVT (as we correctly forward
traps), expose it to guests.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Review

KVM: arm64: nv: Expose FEAT_EVT to nested guests

Now that we properly implement FEAT_EVT (as we correctly forward
traps), expose it to guests.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230815183903.2735724-17-maz@kernel.org

show more ...

Merge branch 'next' into for-linus

Prepare input updates for 6.4 merge window.

Merge branch 'for-6.4/amd-sfh' into for-linus

- assorted functional fixes for amd-sfh driver (Basavaraj Natikar)

Merge drm/drm-next into drm-intel-gt-next

Need to pull in commit from drm-next (earlier in drm-intel-next):

1eca0778f4b3 ("drm/i915: add struct i915_dsm to wrap dsm members together")

In order to

Merge drm/drm-next into drm-intel-gt-next

Need to pull in commit from drm-next (earlier in drm-intel-next):

1eca0778f4b3 ("drm/i915: add struct i915_dsm to wrap dsm members together")

In order to merge following patch to drm-intel-gt-next:

https://patchwork.freedesktop.org/patch/530942/?series=114925&rev=6

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

show more ...

Merge drm/drm-next into drm-intel-next

Catch up with 6.3-rc cycle...

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Merge remote-tracking branch 'drm/drm-next' into msm-next

Merge drm-next into msm-next to pick up external clk and PM dependencies
for improved a6xx GPU reset sequence.

Signed-off-by: Rob Clark <ro

Merge remote-tracking branch 'drm/drm-next' into msm-next

Merge drm-next into msm-next to pick up external clk and PM dependencies
for improved a6xx GPU reset sequence.

Signed-off-by: Rob Clark <robdclark@chromium.org>

show more ...

Merge tag 'v6.3-rc2' into next

Merge with mainline to get of_property_present() and other newer APIs.

Merge drm/drm-fixes into drm-misc-fixes

Backmerging to get latest upstream.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge drm/drm-next into drm-misc-next

Backmerging to get v6.3-rc1 and sync with the other DRM trees.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge remote-tracking branch 'acme/perf-tools' into perf-tools-next

To pick up perf-tools fixes just merged upstream.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
"ARM:

- Provide a virtual cache topology to the guest to avoid
inconsistencies with

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
"ARM:

- Provide a virtual cache topology to the guest to avoid
inconsistencies with migration on heterogenous systems. Non secure
software has no practical need to traverse the caches by set/way in
the first place

- Add support for taking stage-2 access faults in parallel. This was
an accidental omission in the original parallel faults
implementation, but should provide a marginal improvement to
machines w/o FEAT_HAFDBS (such as hardware from the fruit company)

- A preamble to adding support for nested virtualization to KVM,
including vEL2 register state, rudimentary nested exception
handling and masking unsupported features for nested guests

- Fixes to the PSCI relay that avoid an unexpected host SVE trap when
resuming a CPU when running pKVM

- VGIC maintenance interrupt support for the AIC

- Improvements to the arch timer emulation, primarily aimed at
reducing the trap overhead of running nested

- Add CONFIG_USERFAULTFD to the KVM selftests config fragment in the
interest of CI systems

- Avoid VM-wide stop-the-world operations when a vCPU accesses its
own redistributor

- Serialize when toggling CPACR_EL1.SMEN to avoid unexpected
exceptions in the host

- Aesthetic and comment/kerneldoc fixes

- Drop the vestiges of the old Columbia mailing list and add [Oliver]
as co-maintainer

RISC-V:

- Fix wrong usage of PGDIR_SIZE instead of PUD_SIZE

- Correctly place the guest in S-mode after redirecting a trap to the
guest

- Redirect illegal instruction traps to guest

- SBI PMU support for guest

s390:

- Sort out confusion between virtual and physical addresses, which
currently are the same on s390

- A new ioctl that performs cmpxchg on guest memory

- A few fixes

x86:

- Change tdp_mmu to a read-only parameter

- Separate TDP and shadow MMU page fault paths

- Enable Hyper-V invariant TSC control

- Fix a variety of APICv and AVIC bugs, some of them real-world, some
of them affecting architecurally legal but unlikely to happen in
practice

- Mark APIC timer as expired if its in one-shot mode and the count
underflows while the vCPU task was being migrated

- Advertise support for Intel's new fast REP string features

- Fix a double-shootdown issue in the emergency reboot code

- Ensure GIF=1 and disable SVM during an emergency reboot, i.e. give
SVM similar treatment to VMX

- Update Xen's TSC info CPUID sub-leaves as appropriate

- Add support for Hyper-V's extended hypercalls, where "support" at
this point is just forwarding the hypercalls to userspace

- Clean up the kvm->lock vs. kvm->srcu sequences when updating the
PMU and MSR filters

- One-off fixes and cleanups

- Fix and cleanup the range-based TLB flushing code, used when KVM is
running on Hyper-V

- Add support for filtering PMU events using a mask. If userspace
wants to restrict heavily what events the guest can use, it can now
do so without needing an absurd number of filter entries

- Clean up KVM's handling of "PMU MSRs to save", especially when vPMU
support is disabled

- Add PEBS support for Intel Sapphire Rapids

- Fix a mostly benign overflow bug in SEV's
send|receive_update_data()

- Move several SVM-specific flags into vcpu_svm

x86 Intel:

- Handle NMI VM-Exits before leaving the noinstr region

- A few trivial cleanups in the VM-Enter flows

- Stop enabling VMFUNC for L1 purely to document that KVM doesn't
support EPTP switching (or any other VM function) for L1

- Fix a crash when using eVMCS's enlighted MSR bitmaps

Generic:

- Clean up the hardware enable and initialization flow, which was
scattered around multiple arch-specific hooks. Instead, just let
the arch code call into generic code. Both x86 and ARM should
benefit from not having to fight common KVM code's notion of how to
do initialization

- Account allocations in generic kvm_arch_alloc_vm()

- Fix a memory leak if coalesced MMIO unregistration fails

selftests:

- On x86, cache the CPU vendor (AMD vs. Intel) and use the info to
emit the correct hypercall instruction instead of relying on KVM to
patch in VMMCALL

- Use TAP interface for kvm_binary_stats_test and tsc_msrs_test"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (325 commits)
KVM: SVM: hyper-v: placate modpost section mismatch error
KVM: x86/mmu: Make tdp_mmu_allowed static
KVM: arm64: nv: Use reg_to_encoding() to get sysreg ID
KVM: arm64: nv: Only toggle cache for virtual EL2 when SCTLR_EL2 changes
KVM: arm64: nv: Filter out unsupported features from ID regs
KVM: arm64: nv: Emulate EL12 register accesses from the virtual EL2
KVM: arm64: nv: Allow a sysreg to be hidden from userspace only
KVM: arm64: nv: Emulate PSTATE.M for a guest hypervisor
KVM: arm64: nv: Add accessors for SPSR_EL1, ELR_EL1 and VBAR_EL1 from virtual EL2
KVM: arm64: nv: Handle SMCs taken from virtual EL2
KVM: arm64: nv: Handle trapped ERET from virtual EL2
KVM: arm64: nv: Inject HVC exceptions to the virtual EL2
KVM: arm64: nv: Support virtual EL2 exceptions
KVM: arm64: nv: Handle HCR_EL2.NV system register traps
KVM: arm64: nv: Add nested virt VCPU primitives for vEL2 VCPU state
KVM: arm64: nv: Add EL2 system registers to vcpu context
KVM: arm64: nv: Allow userspace to set PSR_MODE_EL2x
KVM: arm64: nv: Reset VCPU to EL2 registers if VCPU nested virt is set
KVM: arm64: nv: Introduce nested virtualization VCPU feature
KVM: arm64: Use the S2 MMU context to iterate over S2 table
...

show more ...

Merge tag 'kvmarm-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 updates for 6.3

- Provide a virtual cache topology to the guest to avoid
inconsistencie

Merge tag 'kvmarm-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 updates for 6.3

- Provide a virtual cache topology to the guest to avoid
inconsistencies with migration on heterogenous systems. Non secure
software has no practical need to traverse the caches by set/way in
the first place.

- Add support for taking stage-2 access faults in parallel. This was an
accidental omission in the original parallel faults implementation,
but should provide a marginal improvement to machines w/o FEAT_HAFDBS
(such as hardware from the fruit company).

- A preamble to adding support for nested virtualization to KVM,
including vEL2 register state, rudimentary nested exception handling
and masking unsupported features for nested guests.

- Fixes to the PSCI relay that avoid an unexpected host SVE trap when
resuming a CPU when running pKVM.

- VGIC maintenance interrupt support for the AIC

- Improvements to the arch timer emulation, primarily aimed at reducing
the trap overhead of running nested.

- Add CONFIG_USERFAULTFD to the KVM selftests config fragment in the
interest of CI systems.

- Avoid VM-wide stop-the-world operations when a vCPU accesses its own
redistributor.

- Serialize when toggling CPACR_EL1.SMEN to avoid unexpected exceptions
in the host.

- Aesthetic and comment/kerneldoc fixes

- Drop the vestiges of the old Columbia mailing list and add [Oliver]
as co-maintainer

This also drags in arm64's 'for-next/sme2' branch, because both it and
the PSCI relay changes touch the EL2 initialization code.

show more ...

Merge tag ' https://github.com/oupton/linux tags/kvmarm-6.3' from into kvmarm-master/next

Merge Oliver's kvmarm-6.3 tag:

KVM/arm64 updates for 6.3

- Provide a virtual cache topology to the guest

Merge tag ' https://github.com/oupton/linux tags/kvmarm-6.3' from into kvmarm-master/next

Merge Oliver's kvmarm-6.3 tag:

KVM/arm64 updates for 6.3

- Provide a virtual cache topology to the guest to avoid
inconsistencies with migration on heterogenous systems. Non secure
software has no practical need to traverse the caches by set/way in
the first place.

- Add support for taking stage-2 access faults in parallel. This was an
accidental omission in the original parallel faults implementation,
but should provide a marginal improvement to machines w/o FEAT_HAFDBS
(such as hardware from the fruit company).

- A preamble to adding support for nested virtualization to KVM,
including vEL2 register state, rudimentary nested exception handling
and masking unsupported features for nested guests.

- Fixes to the PSCI relay that avoid an unexpected host SVE trap when
resuming a CPU when running pKVM.

- VGIC maintenance interrupt support for the AIC

- Improvements to the arch timer emulation, primarily aimed at reducing
the trap overhead of running nested.

- Add CONFIG_USERFAULTFD to the KVM selftests config fragment in the
interest of CI systems.

- Avoid VM-wide stop-the-world operations when a vCPU accesses its own
redistributor.

- Serialize when toggling CPACR_EL1.SMEN to avoid unexpected exceptions
in the host.

- Aesthetic and comment/kerneldoc fixes

- Drop the vestiges of the old Columbia mailing list and add myself as
co-maintainer

This also drags in a couple of branches to avoid conflicts:

- The shared 'kvm-hw-enable-refactor' branch that reworks
initialization, as it conflicted with the virtual cache topology
changes.

- arm64's 'for-next/sme2' branch, as the PSCI relay changes, as both
touched the EL2 initialization code.

Signed-off-by: Marc Zyngier <maz@kernel.org>

show more ...

Merge branch kvm-arm64/nv-prefix into kvmarm/next

* kvm-arm64/nv-prefix:
: Preamble to NV support, courtesy of Marc Zyngier.
:
: This brings in a set of prerequisite patches for supporting nes

Merge branch kvm-arm64/nv-prefix into kvmarm/next

* kvm-arm64/nv-prefix:
: Preamble to NV support, courtesy of Marc Zyngier.
:
: This brings in a set of prerequisite patches for supporting nested
: virtualization in KVM/arm64. Of course, there is a long way to go until
: NV is actually enabled in KVM.
:
: - Introduce cpucap / vCPU feature flag to pivot the NV code on
:
: - Add support for EL2 vCPU register state
:
: - Basic nested exception handling
:
: - Hide unsupported features from the ID registers for NV-capable VMs
KVM: arm64: nv: Use reg_to_encoding() to get sysreg ID
KVM: arm64: nv: Only toggle cache for virtual EL2 when SCTLR_EL2 changes
KVM: arm64: nv: Filter out unsupported features from ID regs
KVM: arm64: nv: Emulate EL12 register accesses from the virtual EL2
KVM: arm64: nv: Allow a sysreg to be hidden from userspace only
KVM: arm64: nv: Emulate PSTATE.M for a guest hypervisor
KVM: arm64: nv: Add accessors for SPSR_EL1, ELR_EL1 and VBAR_EL1 from virtual EL2
KVM: arm64: nv: Handle SMCs taken from virtual EL2
KVM: arm64: nv: Handle trapped ERET from virtual EL2
KVM: arm64: nv: Inject HVC exceptions to the virtual EL2
KVM: arm64: nv: Support virtual EL2 exceptions
KVM: arm64: nv: Handle HCR_EL2.NV system register traps
KVM: arm64: nv: Add nested virt VCPU primitives for vEL2 VCPU state
KVM: arm64: nv: Add EL2 system registers to vcpu context
KVM: arm64: nv: Allow userspace to set PSR_MODE_EL2x
KVM: arm64: nv: Reset VCPU to EL2 registers if VCPU nested virt is set
KVM: arm64: nv: Introduce nested virtualization VCPU feature
KVM: arm64: Use the S2 MMU context to iterate over S2 table
arm64: Add ARM64_HAS_NESTED_VIRT cpufeature

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

show more ...

KVM: arm64: nv: Use reg_to_encoding() to get sysreg ID

Avoid open-coding and just use the helper to encode the ID from the
sysreg table entry.

No functional change intended.

Acked-by: Marc Zyngier

KVM: arm64: nv: Use reg_to_encoding() to get sysreg ID

Avoid open-coding and just use the helper to encode the ID from the
sysreg table entry.

No functional change intended.

Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230211190742.49843-1-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

show more ...

KVM: arm64: nv: Filter out unsupported features from ID regs

As there is a number of features that we either can't support,
or don't want to support right away with NV, let's add some
basic filterin

KVM: arm64: nv: Filter out unsupported features from ID regs

As there is a number of features that we either can't support,
or don't want to support right away with NV, let's add some
basic filtering so that we don't advertize silly things to the
EL2 guest.

Whilst we are at it, advertize FEAT_TTL as well as FEAT_GTG, which
the NV implementation will implement.

Reviewed-by: Ganapatrao Kulkarni <gankulkarni@os.amperecomputing.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230209175820.1939006-18-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

show more ...