[RFC kvmtool 10/31] arm64: Create a realm virtual machine
From: Suzuki K Poulose <suzuki.poulose@arm.com>
Date: 2023-01-27 11:41:37
Also in:
kvm, kvmarm, linux-coco, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: Christoffer Dall <redacted>
Set the machine type to realm when creating a VM via the KVM_CREATE_VM
ioctl.
Signed-off-by: Christoffer Dall <redacted>
[ Alex E: Reworked patch, split the command line option into a different
patch ]
Signed-off-by: Alexandru Elisei <redacted>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
arm/aarch64/kvm.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/arm/aarch64/kvm.c b/arm/aarch64/kvm.c
index 25be2f2d..5db4c572 100644
--- a/arm/aarch64/kvm.c
+++ b/arm/aarch64/kvm.c@@ -131,12 +131,15 @@ int kvm__arch_get_ipa_limit(struct kvm *kvm) int kvm__get_vm_type(struct kvm *kvm) { unsigned int ipa_bits, max_ipa_bits; - unsigned long max_ipa; + unsigned long max_ipa, vm_type; - /* If we're running on an old kernel, use 0 as the VM type */ + vm_type = kvm->cfg.arch.is_realm ? \ + KVM_VM_TYPE_ARM_REALM : KVM_VM_TYPE_ARM_NORMAL; + + /* If we're running on an old kernel, use 0 as the IPA bits */ max_ipa_bits = kvm__arch_get_ipa_limit(kvm); if (!max_ipa_bits) - return 0; + return vm_type; /* Otherwise, compute the minimal required IPA size */ max_ipa = kvm->cfg.ram_addr + kvm->cfg.ram_size - 1;
@@ -147,7 +150,8 @@ int kvm__get_vm_type(struct kvm *kvm) if (ipa_bits > max_ipa_bits) die("Memory too large for this system (needs %d bits, %d available)", ipa_bits, max_ipa_bits); - return KVM_VM_TYPE_ARM_IPA_SIZE(ipa_bits); + vm_type |= KVM_VM_TYPE_ARM_IPA_SIZE(ipa_bits); + return vm_type; } void kvm__arch_enable_mte(struct kvm *kvm)
--
2.34.1
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