[RFC kvmtool 12/31] arm64: Create Realm Descriptor

Suzuki K Poulose
2023-01-27T11:41:44Z

From: Alexandru Elisei <alexandru.elisei@arm.com>

Create the Realm Descriptor using the measurement algorithm set
with --measurement-algo.

Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
Makefile | 1 +
arm/aarch32/include/asm/realm.h | 10 ++++++++++
arm/aarch64/include/asm/realm.h | 10 ++++++++++
arm/aarch64/realm.c | 14 ++++++++++++++
arm/kvm.c | 3 +++
5 files changed, 38 insertions(+)
create mode 100644 arm/aarch32/include/asm/realm.h
create mode 100644 arm/aarch64/include/asm/realm.h
create mode 100644 arm/aarch64/realm.c

diff --git a/Makefile b/Makefile
index ed2414bd..88cdf6d2 100644
--- a/Makefile
+++ b/Makefile
@@ -192,6 +192,7 @@ ifeq ($(ARCH), arm64)
OBJS += arm/aarch64/kvm.o
OBJS += arm/aarch64/pvtime.o
OBJS += arm/aarch64/pmu.o
+ OBJS += arm/aarch64/realm.o
ARCH_INCLUDE := $(HDRS_ARM_COMMON)
ARCH_INCLUDE += -Iarm/aarch64/include

diff --git a/arm/aarch32/include/asm/realm.h b/arm/aarch32/include/asm/realm.h
new file mode 100644
index 00000000..5aca6cca
--- /dev/null
+++ b/arm/aarch32/include/asm/realm.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASM_REALM_H
+#define __ASM_REALM_H
+
+#include "kvm/kvm.h"
+
+static inline void kvm_arm_realm_create_realm_descriptor(struct kvm *kvm) {}
+
+#endif /* ! __ASM_REALM_H */
diff --git a/arm/aarch64/include/asm/realm.h b/arm/aarch64/include/asm/realm.h
new file mode 100644
index 00000000..e176f15f
--- /dev/null
+++ b/arm/aarch64/include/asm/realm.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASM_REALM_H
+#define __ASM_REALM_H
+
+#include "kvm/kvm.h"
+
+void kvm_arm_realm_create_realm_descriptor(struct kvm *kvm);
+
+#endif /* ! __ASM_REALM_H */
diff --git a/arm/aarch64/realm.c b/arm/aarch64/realm.c
new file mode 100644
index 00000000..3a4adb66
--- /dev/null
+++ b/arm/aarch64/realm.c
@@ -0,0 +1,14 @@
+#include "kvm/kvm.h"
+
+#include <asm/realm.h>
+
+void kvm_arm_realm_create_realm_descriptor(struct kvm *kvm)
+{
+ struct kvm_enable_cap rme_create_rd = {
+ .cap = KVM_CAP_ARM_RME,
+ .args[0] = KVM_CAP_ARM_RME_CREATE_RD,
+ };
+
+ if (ioctl(kvm->vm_fd, KVM_ENABLE_CAP, &rme_create_rd) < 0)
+ die_perror("KVM_CAP_RME(KVM_CAP_ARM_RME_CREATE_RD)");
+}
diff --git a/arm/kvm.c b/arm/kvm.c
index 0e40b753..2510a322 100644
--- a/arm/kvm.c
+++ b/arm/kvm.c
@@ -127,6 +127,9 @@ void kvm__arch_set_cmdline(char *cmdline, bool video)

void kvm__arch_init(struct kvm *kvm)
{
+ if (kvm->cfg.arch.is_realm)
+ kvm_arm_realm_create_realm_descriptor(kvm);
+
/* Create the virtual GIC. */
if (gic__create(kvm, kvm->cfg.arch.irqchip))
die("Failed to create virtual GIC");
--
2.34.1