Re: [PATCH V2] KVM: ARM: Remove pgtable page standard functions from stage-2 page tables

[+KVM/ARM folks, since I can't take this without an Ack in place from them] My understanding is that this patch is intended to replace patch 3/4 in this series: http://lists.infradead.org/pipermail/linux-arm-kernel/2019-March/638083.html On Tue, Mar 12, 2019 at 06:55:45PM +0530, Anshuman Khandua

Re: [PATCH 5/8] KVM: arm/arm64: Enforce PTE mappings at stage2 when needed

Hi Suzuki, On 3/28/19 2:36 PM, Marc Zyngier wrote: > From: Suzuki K Poulose > > commit 6794ad5443a2118 ("KVM: arm/arm64: Fix unintended stage 2 PMD mappings") > made the checks to skip huge mappings, stricter. However it introduced > a bug where we still use huge mappings, ignoring the flag to >

[PATCH v8 2/9] KVM: arm64: Support runtime sysreg visibility filtering

From: Dave Martin Some optional features of the Arm architecture add new system registers that are not present in the base architecture. Where these features are optional for the guest, the visibility of these registers may need to depend on some runtime configuration, such as a flag passed to K

[PATCH v8 3/9] KVM: arm64: Move hyp_symbol_addr to fix dependency

Currently hyp_symbol_addr is placed in kvm_mmu.h which is mostly used by __hyp_this_cpu_ptr in kvm_asm.h but it cannot include kvm_mmu.h directly as kvm_mmu.h uses kvm_ksym_ref which is defined inside kvm_asm.h. Hence, hyp_symbol_addr is moved inside kvm_asm.h to fix this dependency on each other.

[PATCH v8 5/9] KVM: arm/arm64: preserve host MDCR_EL2 value

Save host MDCR_EL2 value during kvm HYP initialisation and restore after every switch from host to guest. There should not be any change in functionality due to this. The value of mdcr_el2 is now stored in struct kvm_cpu_context as both host and guest can now use this field in a common way. Signe

[PATCH v8 1/9] KVM: arm64: Propagate vcpu into read_id_reg()

From: Dave Martin Architecture features that are conditionally visible to the guest will require run-time checks in the ID register accessor functions. In particular, read_id_reg() will need to perform checks in order to generate the correct emulated value for certain ID register fields such as I

[PATCH v8 0/9] Add ARMv8.3 pointer authentication for kvm guest

Hi, This patch series adds pointer authentication support for KVM guest and is based on top of Linux 5.1-rc3. The basic patches in this series was originally posted by Mark Rutland earlier[1,2] and contains some history of this work. Extension Overview: ===

[PATCH v8 4/9] KVM: arm/arm64: preserve host HCR_EL2 value

From: Mark Rutland When restoring HCR_EL2 for the host, KVM uses HCR_HOST_VHE_FLAGS, which is a constant value. This works today, as the host HCR_EL2 value is always the same, but this will get in the way of supporting extensions that require HCR_EL2 bits to be set conditionally for the host. To

[PATCH v8 6/9] KVM: arm64: Add vcpu feature flags to control ptrauth accessibility

Since Pointer authentication will be enabled or disabled on a per-vcpu basis, vcpu feature flags are added in order to know which vcpus have it enabled from userspace. This features will allow the KVM guest to allow the handling of pointer authentication instructions or to treat them as undefined

[PATCH v8 8/9] KVM: arm64: Add capability to advertise ptrauth for guest

This patch advertises the capability of two cpu feature called address pointer authentication and generic pointer authentication. These capabilities depend upon system support for pointer authentication and VHE mode. The current arm64 KVM partially implements pointer authentication and support of

[PATCH v8 7/9] KVM: arm/arm64: context-switch ptrauth registers

From: Mark Rutland When pointer authentication is supported, a guest may wish to use it. This patch adds the necessary KVM infrastructure for this to work, with a semi-lazy context switch of the pointer auth state. Pointer authentication feature is only enabled when VHE is built in the kernel an

[kvmtool PATCH v8 9/9] KVM: arm/arm64: Add a vcpu feature for pointer authentication

This is 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. A command line option --ptrauth is also

Re: [PATCH v7 16/27] KVM: arm64: Factor out core register ID enumeration

On Fri, 29 Mar 2019 13:00:41 +, Dave Martin wrote: > > In preparation for adding logic to filter out some KVM_REG_ARM_CORE > registers from the KVM_GET_REG_LIST output, this patch factors out > the core register enumeration into a separate function and rebuilds > num_core_regs() on top of it.

Re: [PATCH v6 11/27] KVM: arm64: Support runtime sysreg visibility filtering

Hi Dave, On Tue, Mar 19, 2019 at 11:26 PM Dave Martin wrote: > > Some optional features of the Arm architecture add new system > registers that are not present in the base architecture. > > Where these features are optional for the guest, the visibility of > these registers may need to depend on

Re: [PATCH V2] KVM: ARM: Remove pgtable page standard functions from stage-2 page tables

On Mon, Apr 01, 2019 at 05:16:38PM +0100, Will Deacon wrote: > [+KVM/ARM folks, since I can't take this without an Ack in place from them] > > My understanding is that this patch is intended to replace patch 3/4 in > this series: > > http://lists.infradead.org/pipermail/linux-arm-kernel/2019-Marc