[PATCH v3 11/11] KVM: arm64: Enable guest_memfd private memory when pKVM is enabled

[Fuad Tabba <tabba@google.com>]

Implement kvm_arch_has_private_mem() in arm64 when pKVM is
enabled, and make it dependent on the configuration option.

Also, now that the infrastructure is in place for arm64 to
support guest private memory, enable it in the arm64 kernel
configuration.

Signed-off-by: Fuad Tabba <tabba@google.com>
---
 arch/arm64/include/asm/kvm_host.h | 3 +++
 arch/arm64/kvm/Kconfig            | 1 +
 2 files changed, 4 insertions(+)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 94cff508874b..eec32e537097 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -1496,4 +1496,7 @@ void kvm_set_vm_id_reg(struct kvm *kvm, u32 reg, u64 val);
 	(system_supports_fpmr() &&			\
 	 kvm_has_feat((k), ID_AA64PFR2_EL1, FPMR, IMP))
 
+#define kvm_arch_has_private_mem(kvm)					\
+	(IS_ENABLED(CONFIG_KVM_PRIVATE_MEM) && is_protected_kvm_enabled())
+
 #endif /* __ARM64_KVM_HOST_H__ */
diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
index ead632ad01b4..fe3451f244b5 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_MAPPABLE
 	help
 	  Support hosting virtualized guest machines.
 
-- 
2.47.0.rc0.187.ge670bccf7e-goog