[Qemu-devel] [RFC v4 02/16] linux-headers: header update for KVM/ARM KVM_ARM_GET_MAX_VM_PHYS_SHIFT

[Eric Auger]

This is a header update against kvmarm next branch

git://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 <address@hidden>

---

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 */
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
-- 
2.17.1