[RFC v3 11/23] target/arm: kvm: add stubs for some helpers

[Claudio Fontana <cfontana@suse.de>]

at least the armv7m one should go away with proper
configuration changes (only enabling possible boards for KVM).

Signed-off-by: Claudio Fontana <cfontana@suse.de>
---
 target/arm/kvm/helper-stubs.c | 27 +++++++++++++++++++++++++++
 target/arm/kvm/meson.build    |  3 +++
 target/arm/meson.build        |  1 +
 3 files changed, 31 insertions(+)
 create mode 100644 target/arm/kvm/helper-stubs.c
 create mode 100644 target/arm/kvm/meson.build

diff --git a/target/arm/kvm/helper-stubs.c b/target/arm/kvm/helper-stubs.c
new file mode 100644
index 0000000000..8e952c91fa
--- /dev/null
+++ b/target/arm/kvm/helper-stubs.c
@@ -0,0 +1,27 @@
+/*
+ * QEMU ARM KVM stubs for some helper functions
+ *
+ * Copyright 2021 SUSE LLC
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+
+/* return the effective value of HCR_EL2. For KVM, always 0. */
+uint64_t arm_hcr_el2_eff(CPUARMState *env)
+{
+    return 0;
+}
+
+int fp_exception_el(CPUARMState *env, int cur_el)
+{
+    return 0;
+}
+
+void write_v7m_exception(CPUARMState *env, uint32_t new_exc)
+{
+    g_assert_not_reached();
+}
diff --git a/target/arm/kvm/meson.build b/target/arm/kvm/meson.build
new file mode 100644
index 0000000000..1015fc0afb
--- /dev/null
+++ b/target/arm/kvm/meson.build
@@ -0,0 +1,3 @@
+arm_ss.add(when: 'CONFIG_TCG', if_false: files(
+  'helper-stubs.c',
+))
diff --git a/target/arm/meson.build b/target/arm/meson.build
index 7a6d0d6ba4..cd2ae221a6 100644
--- a/target/arm/meson.build
+++ b/target/arm/meson.build
@@ -34,6 +34,7 @@ arm_softmmu_ss.add(when: 'CONFIG_TCG', if_true: files(
 arm_user_ss = ss.source_set()
 
 subdir('tcg')
+subdir('kvm')
 
 target_arch += {'arm': arm_ss}
 target_softmmu_arch += {'arm': arm_softmmu_ss}
-- 
2.26.2