Re: [PATCH 2/3] kvmppc: add hypercall infrastructure - guest part v3

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On Sep 16, 2008, at 1:27 AM, ehrhardt@xxxxxxxxxxxxxxxxxx wrote:

From: Christian Ehrhardt <ehrhardt@xxxxxxxxxxxxxxxxxx>

This adds the guest portion of the hypercall infrastructure.

Version 3 now follows the beat ABI, but proposes a new implementation style as static inline asm functions instead of pure assembler code. That should allow
the compiler to be more flexible and therefore a better optimization.

If people agree on that new implementation style we might merge this code.
The current implementation of beat style hypercalls can be found in
arch/powerpc/platforms/cell/beat_hvCall.S

Signed-off-by: Christian Ehrhardt <ehrhardt@xxxxxxxxxxxxxxxxxx>
---

[diffstat]
epapr_hcalls.h | 59 +++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++
1 file changed, 59 insertions(+)

[diff]

diff --git a/include/asm-powerpc/epapr_hcalls.h b/include/asm- powerpc/epapr_hcalls.h
new file mode 100644
--- /dev/null
+++ b/include/asm-powerpc/epapr_hcalls.h
@@ -0,0 +1,59 @@
+/*
+ * 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 IBM Corp. 2008
+ *
+ * Authors:
+ * 	Christian Ehrhardt <ehrhardt@xxxxxxxxxx>
+ */
+
+#ifndef __POWERPC_EPAPR_HCALLS_H__
+#define __POWERPC_EPAPR_HCALLS_H__
+
+#ifdef __KERNEL__
+
+/* Hypercalls use the beat ABI */
+#define KVM_HYPERCALL_BIN 0x44000022

Any reason this isn't 'sc' ?

Also, can we make this "sc 1" so its works when we have HW hypervisor support?

- k
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