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authorAlexander Graf <agraf@suse.de>2010-07-29 14:47:57 +0200
committerAvi Kivity <avi@redhat.com>2010-10-24 10:50:50 +0200
commitd17051cb8d223dffd6bb847b0565ef1654f8e0e1 (patch)
tree486a1b71ec2147de47a6a4c34c9b9ab88be039e7 /arch/powerpc/kernel/kvm_emul.S
parentba492962363a02c45836be205f339be48093e1be (diff)
KVM: PPC: Generic KVM PV guest support
We have all the hypervisor pieces in place now, but the guest parts are still missing. This patch implements basic awareness of KVM when running Linux as guest. It doesn't do anything with it yet though. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/powerpc/kernel/kvm_emul.S')
-rw-r--r--arch/powerpc/kernel/kvm_emul.S36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/kvm_emul.S b/arch/powerpc/kernel/kvm_emul.S
new file mode 100644
index 00000000000..5cfa2aeeecb
--- /dev/null
+++ b/arch/powerpc/kernel/kvm_emul.S
@@ -0,0 +1,36 @@
+/*
+ * 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, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Copyright SUSE Linux Products GmbH 2010
+ *
+ * Authors: Alexander Graf <agraf@suse.de>
+ */
+
+#include <asm/ppc_asm.h>
+#include <asm/kvm_asm.h>
+#include <asm/reg.h>
+#include <asm/page.h>
+#include <asm/asm-offsets.h>
+
+/* Hypercall entry point. Will be patched with device tree instructions. */
+
+.global kvm_hypercall_start
+kvm_hypercall_start:
+ li r3, -1
+ nop
+ nop
+ nop
+ blr
+
+#define KVM_MAGIC_PAGE (-4096)