WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-ia64-devel

[Xen-ia64-devel] [PATCH 33/50] ia64/xen: detect xen environment at early

Currently it detects by checking psr.cpl != 0.
It's ok for now, but more abstraction would be needed later like x86.
Presumably extending booting protocol (i.e. extending struct ia64_boot_param)
or multi entry points depending on hypervisor would be necessary.

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
 arch/ia64/kernel/head.S           |    6 ++++
 arch/ia64/xen/xensetup.S          |   40 +++++++++++++++++++++++++++
 include/asm-ia64/xen/hypervisor.h |   55 +++++++++++++++++++++++++++++++++++++
 3 files changed, 101 insertions(+), 0 deletions(-)
 create mode 100644 arch/ia64/xen/xensetup.S
 create mode 100644 include/asm-ia64/xen/hypervisor.h

diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S
index d3a41d5..2f8d770 100644
--- a/arch/ia64/kernel/head.S
+++ b/arch/ia64/kernel/head.S
@@ -367,6 +367,12 @@ start_ap:
        ;;
 (isBP) st8 [r2]=r28            // save the address of the boot param area 
passed by the bootloader
 
+#ifdef CONFIG_XEN
+       //  Note: isBP is used by the subprogram.
+       br.call.sptk.many rp=early_xen_setup
+       ;;
+#endif
+
 #ifdef CONFIG_SMP
 (isAP) br.call.sptk.many rp=start_secondary
 .ret0:
diff --git a/arch/ia64/xen/xensetup.S b/arch/ia64/xen/xensetup.S
new file mode 100644
index 0000000..17ad297
--- /dev/null
+++ b/arch/ia64/xen/xensetup.S
@@ -0,0 +1,40 @@
+/*
+ * Support routines for Xen
+ *
+ * Copyright (C) 2005 Dan Magenheimer <dan.magenheimer@xxxxxx>
+ */
+
+#include <asm/processor.h>
+#include <asm/asmmacro.h>
+
+       .section .data.read_mostly
+       .align 8
+       .global running_on_xen
+running_on_xen:
+       data4 0
+       .previous
+
+#define isBP   p3      // are we the Bootstrap Processor?
+
+       .text
+GLOBAL_ENTRY(early_xen_setup)
+       mov r8=ar.rsc           // Initialized in head.S
+(isBP) movl r9=running_on_xen;;
+       extr.u r8=r8,2,2;;      // Extract pl fields
+       cmp.eq p7,p0=r8,r0      // p7: !running on xen
+       mov r8=1                // booleanize.
+(p7)   br.ret.sptk.many rp;;
+(isBP) st4 [r9]=r8
+       movl r10=xen_ivt;;
+
+       mov cr.iva=r10
+
+       /* Set xsi base.  */
+#define FW_HYPERCALL_SET_SHARED_INFO_VA                        0x600
+(isBP) mov r2=FW_HYPERCALL_SET_SHARED_INFO_VA
+(isBP) movl r28=XSI_BASE;;
+(isBP) break 0x1000;;
+
+       br.ret.sptk.many rp
+       ;;
+END(early_xen_setup)
diff --git a/include/asm-ia64/xen/hypervisor.h 
b/include/asm-ia64/xen/hypervisor.h
new file mode 100644
index 0000000..78c5635
--- /dev/null
+++ b/include/asm-ia64/xen/hypervisor.h
@@ -0,0 +1,55 @@
+/******************************************************************************
+ * hypervisor.h
+ *
+ * Linux-specific hypervisor handling.
+ *
+ * Copyright (c) 2002-2004, K A Fraser
+ *
+ * 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; or, when distributed
+ * separately from the Linux kernel or incorporated into other
+ * software packages, subject to the following license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy, modify,
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef _ASM_IA64_XEN_HYPERVISOR_H
+#define _ASM_IA64_XEN_HYPERVISOR_H
+
+#ifdef CONFIG_XEN
+/* running_on_xen is set before executing any C code by early_xen_setup */
+extern const int running_on_xen;
+#define is_running_on_xen()                    (running_on_xen)
+#else /* CONFIG_XEN */
+# ifdef CONFIG_VMX_GUEST
+#  define is_running_on_xen()                  (1)
+# else /* CONFIG_VMX_GUEST */
+#  define is_running_on_xen()                  (0)
+# endif /* CONFIG_VMX_GUEST */
+#endif /* CONFIG_XEN */
+
+#ifdef CONFIG_XEN_PRIVILEGED_GUEST
+#define is_initial_xendomain()                                         \
+       (is_running_on_xen() ? xen_start_info->flags & SIF_INITDOMAIN : 0)
+#else
+#define is_initial_xendomain() 0
+#endif
+
+#endif /* _ASM_IA64_XEN_HYPERVISOR_H */
-- 
1.5.3


_______________________________________________
Xen-ia64-devel mailing list
Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ia64-devel

<Prev in Thread] Current Thread [Next in Thread>