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authorMarc Zyngier <marc.zyngier@arm.com>2013-07-12 15:15:23 +0100
committerChristoffer Dall <christoffer.dall@linaro.org>2014-07-11 04:57:36 -0700
commitb2fb1c0d378399e1427a91bb991c094f2ca09a2f (patch)
tree4e06317bc81281d27e80932f6c7ab0519bf5f1a6 /arch/arm64/kvm
parentac3c3747e2db2f326ffc601651de544cdd33a8e9 (diff)
KVM: ARM: vgic: add the GICv3 backend
Introduce the support code for emulating a GICv2 on top of GICv3 hardware. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/kvm')
-rw-r--r--arch/arm64/kvm/vgic-v3-switch.S29
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm64/kvm/vgic-v3-switch.S b/arch/arm64/kvm/vgic-v3-switch.S
new file mode 100644
index 000000000000..9fbf27350c84
--- /dev/null
+++ b/arch/arm64/kvm/vgic-v3-switch.S
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2012,2013 - ARM Ltd
+ * Author: Marc Zyngier <marc.zyngier@arm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/linkage.h>
+#include <linux/irqchip/arm-gic-v3.h>
+
+ .text
+ .pushsection .hyp.text, "ax"
+
+ENTRY(__vgic_v3_get_ich_vtr_el2)
+ mrs x0, ICH_VTR_EL2
+ ret
+ENDPROC(__vgic_v3_get_ich_vtr_el2)
+
+ .popsection