KVM: arm64: Stub CONFIG_DEBUG_LIST at Hyp

In order to use the kernel list library at EL2, introduce stubs for the
CONFIG_DEBUG_LIST out-of-lines calls.

Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210319100146.1149909-12-qperret@google.com

diff --git a/arch/arm64/kvm/hyp/nvhe/Makefile b/arch/arm64/kvm/hyp/nvhe/Makefile
index 24ff99e2eac52de4c9b30d2b8423bd3e45c82b10..144da72ad510772a5aa19cd239799715d34261b5 100644 (file)
--- a/arch/arm64/kvm/hyp/nvhe/Makefile
+++ b/arch/arm64/kvm/hyp/nvhe/Makefile
@@ -13,7 +13,7 @@ lib-objs := clear_page.o copy_page.o memcpy.o memset.o
 lib-objs := $(addprefix ../../../lib/, $(lib-objs))
 
 obj-y := timer-sr.o sysreg-sr.o debug-sr.o switch.o tlb.o hyp-init.o host.o \
-        hyp-main.o hyp-smp.o psci-relay.o early_alloc.o
+        hyp-main.o hyp-smp.o psci-relay.o early_alloc.o stub.o
 obj-y += ../vgic-v3-sr.o ../aarch32.o ../vgic-v2-cpuif-proxy.o ../entry.o \
         ../fpsimd.o ../hyp-entry.o ../exception.o
 obj-y += $(lib-objs)

diff --git a/arch/arm64/kvm/hyp/nvhe/stub.c b/arch/arm64/kvm/hyp/nvhe/stub.c
new file mode 100644 (file)
index 0000000..c0aa6bb
--- /dev/null
+++ b/arch/arm64/kvm/hyp/nvhe/stub.c
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Stubs for out-of-line function calls caused by re-using kernel
+ * infrastructure at EL2.
+ *
+ * Copyright (C) 2020 - Google LLC
+ */
+
+#include <linux/list.h>
+
+#ifdef CONFIG_DEBUG_LIST
+bool __list_add_valid(struct list_head *new, struct list_head *prev,
+                     struct list_head *next)
+{
+               return true;
+}
+
+bool __list_del_entry_valid(struct list_head *entry)
+{
+               return true;
+}
+#endif