Hi Eric, On 10/18/2018 03:30 PM, Eric Auger wrote:
This is a header update against kvmarm next branchgit://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm kvmarm/next to get the KVM_ARM_GET_MAX_VM_PHYS_SHIFT ioctl. This allows to retrieve the IPA address range KVM supports. Signed-off-by: Eric Auger <eric.au...@redhat.com> --- v3 -> v4: - update against kvmarm next --- linux-headers/linux/kvm.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h index 83ba4eb571..9647ce4fcb 100644 --- a/linux-headers/linux/kvm.h +++ b/linux-headers/linux/kvm.h @@ -750,6 +750,15 @@ struct kvm_ppc_resize_hpt {#define KVM_S390_SIE_PAGE_OFFSET 1 +/*+ * On arm64, machine type can be used to request the physical + * address size for the VM. Bits[7-0] are reserved for the guest + * PA size shift (i.e, log2(PA_Size)). For backward compatibility, + * value 0 implies the default IPA size, 40bits. + */ +#define KVM_VM_TYPE_ARM_IPA_SIZE_MASK 0xffULL +#define KVM_VM_TYPE_ARM_IPA_SIZE(x) \ + ((x) & KVM_VM_TYPE_ARM_IPA_SIZE_MASK) /* * ioctls for /dev/kvm fds: */ @@ -953,6 +962,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_NESTED_STATE 157 #define KVM_CAP_ARM_INJECT_SERROR_ESR 158 #define KVM_CAP_MSR_PLATFORM_INFO 159 +#define KVM_CAP_ARM_VM_IPA_SIZE 160 /* returns maximum IPA bits for a VM */
Please be aware that there have been multiple merge conflicts with the kvmarm-tree onto kvm tree upstream and the numbers have changed. I assume that you will be rebasing this to mainline anyways. Cheers Suzuki
