diff mbox series

[v7,8/9] KVM: arm64: Enable mapping guest_memfd in arm64

Message ID 20250318161823.4005529-9-tabba@google.com (mailing list archive)
State New
Headers show
Series KVM: Mapping guest_memfd backed memory at the host for software protected VMs | expand

Commit Message

Fuad Tabba March 18, 2025, 4:18 p.m. UTC 
Enable mapping guest_memfd in arm64. For now, it applies to all
VMs in arm64 that use guest_memfd. In the future, new VM types
can restrict this via kvm_arch_gmem_supports_shared_mem().

Signed-off-by: Fuad Tabba <tabba@google.com>
---
 arch/arm64/include/asm/kvm_host.h | 12 ++++++++++++
 arch/arm64/kvm/Kconfig            |  1 +
 2 files changed, 13 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index d919557af5e5..4440b2334a05 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -1543,4 +1543,16 @@  void kvm_set_vm_id_reg(struct kvm *kvm, u32 reg, u64 val);
 #define kvm_has_s1poe(k)				\
 	(kvm_has_feat((k), ID_AA64MMFR3_EL1, S1POE, IMP))
 
+#ifdef CONFIG_KVM_PRIVATE_MEM
+static inline bool kvm_arch_has_private_mem(struct kvm *kvm)
+{
+	return IS_ENABLED(CONFIG_KVM_PRIVATE_MEM);
+}
+
+static inline bool kvm_arch_gmem_supports_shared_mem(struct kvm *kvm)
+{
+	return IS_ENABLED(CONFIG_KVM_GMEM_SHARED_MEM);
+}
+#endif /* CONFIG_KVM_PRIVATE_MEM */
+
 #endif /* __ARM64_KVM_HOST_H__ */
diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
index ead632ad01b4..4830d8805bed 100644
--- a/arch/arm64/kvm/Kconfig
+++ b/arch/arm64/kvm/Kconfig
@@ -38,6 +38,7 @@  menuconfig KVM
 	select HAVE_KVM_VCPU_RUN_PID_CHANGE
 	select SCHED_INFO
 	select GUEST_PERF_EVENTS if PERF_EVENTS
+	select KVM_GMEM_SHARED_MEM
 	help
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