[kvmtool PATCH v5 22/18] kvmtool: arm: Add support for creating VM with PA size

[Suzuki K Poulose]

Specify the physical size for the VM encoded in the vm type.

Signed-off-by: Suzuki K Poulose <suzuki.poul...@arm.com>
---
 arm/include/arm-common/kvm-arch.h |  6 +++++-
 arm/kvm.c                         | 27 +++++++++++++++++++++++++++
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/arm/include/arm-common/kvm-arch.h 
b/arm/include/arm-common/kvm-arch.h
index b29b4b1..d77f3ac 100644
--- a/arm/include/arm-common/kvm-arch.h
+++ b/arm/include/arm-common/kvm-arch.h
@@ -44,7 +44,11 @@
 
 #define KVM_IRQ_OFFSET         GIC_SPI_IRQ_BASE
 
-#define KVM_VM_TYPE            0
+extern unsigned long           kvm_arm_type;
+extern void kvm__arch_init_hyp(struct kvm *kvm);
+
+#define KVM_VM_TYPE            kvm_arm_type
+#define kvm__arch_init_hyp     kvm__arch_init_hyp
 
 #define VIRTIO_DEFAULT_TRANS(kvm)      \
        ((kvm)->cfg.arch.virtio_trans_pci ? VIRTIO_PCI : VIRTIO_MMIO)
diff --git a/arm/kvm.c b/arm/kvm.c
index eac2ad2..6c19dd0 100644
--- a/arm/kvm.c
+++ b/arm/kvm.c
@@ -11,6 +11,8 @@
 #include <linux/kvm.h>
 #include <linux/sizes.h>
 
+unsigned long kvm_arm_type;
+
 struct kvm_ext kvm_req_ext[] = {
        { DEFINE_KVM_EXT(KVM_CAP_IRQCHIP) },
        { DEFINE_KVM_EXT(KVM_CAP_ONE_REG) },
@@ -18,6 +20,31 @@ struct kvm_ext kvm_req_ext[] = {
        { 0, 0 },
 };
 
+#ifndef KVM_CAP_ARM_VM_PHYS_SHIFT
+#define KVM_CAP_ARM_VM_PHYS_SHIFT      159
+#endif
+
+void kvm__arch_init_hyp(struct kvm *kvm)
+{
+       int max_ipa;
+
+       if (!kvm->cfg.arch.phys_shift)
+               kvm->cfg.arch.phys_shift = 40;
+       if (kvm->cfg.arch.phys_shift == 40)
+               return;
+       max_ipa = ioctl(kvm->sys_fd,
+                       KVM_CHECK_EXTENSION, KVM_CAP_ARM_VM_PHYS_SHIFT);
+       if (!max_ipa)
+               die("Kernel doesn't support IPA size configuration\n");
+       if ((kvm->cfg.arch.phys_shift > max_ipa) ||
+           (kvm->cfg.arch.phys_shift < 32))
+               die("Requested PA size (%u) is not supported by the host"
+                   " [32 - %u]bit\n",
+                   kvm->cfg.arch.phys_shift, max_ipa);
+       if (kvm->cfg.arch.phys_shift < 32)
+       kvm_arm_type = kvm->cfg.arch.phys_shift;
+}
+
 bool kvm__arch_cpu_supports_vm(void)
 {
        /* The KVM capability check is enough. */
-- 
2.19.0

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