linux-kernel - [PATCH][v8 5/7] x86/xen: The entrance for PV extension of HVM

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Date:	Thu, 11 Mar 2010 14:28:12 +0800
From:	Sheng Yang <sheng@...ux.intel.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>, Ingo Molnar <mingo@...e.hu>
Cc:	Ian Pratt <Ian.Pratt@...citrix.com>,
	Ian Campbell <Ian.Campbell@...rix.com>,
	linux-kernel@...r.kernel.org,
	xen-devel <xen-devel@...ts.xensource.com>,
	Sheng Yang <sheng@...ux.intel.com>
Subject: [PATCH][v8 5/7] x86/xen: The entrance for PV extension of HVM

xen_guest_init() would setup the environment.

Signed-off-by: Sheng Yang <sheng@...ux.intel.com>
---
 arch/x86/include/asm/xen/hypervisor.h |    6 ++++++
 arch/x86/kernel/setup.c               |    4 ++++
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/xen/hypervisor.h b/arch/x86/include/asm/xen/hypervisor.h
index 396ff4c..13e089a 100644
--- a/arch/x86/include/asm/xen/hypervisor.h
+++ b/arch/x86/include/asm/xen/hypervisor.h
@@ -37,4 +37,10 @@
 extern struct shared_info *HYPERVISOR_shared_info;
 extern struct start_info *xen_start_info;
 
+#ifdef CONFIG_XEN_HVM_PV
+void __init xen_guest_init(void);
+#else
+static inline void xen_guest_init(void) {};
+#endif
+
 #endif /* _ASM_X86_XEN_HYPERVISOR_H */
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 5d9e40c..1cc4786 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -113,6 +113,8 @@
 #endif
 #include <asm/mce.h>
 
+#include <asm/xen/hypervisor.h>
+
 /*
  * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
  * The direct mapping extends to max_pfn_mapped, so that we can directly access
@@ -740,6 +742,8 @@ void __init setup_arch(char **cmdline_p)
 
 	x86_init.oem.arch_setup();
 
+	xen_guest_init();
+
 	setup_memory_map();
 	parse_setup_data();
 	/* update the e820_saved too */
-- 
1.7.0.1

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