Early attempt to add LCD_GUEST arch

.gitignore

@@ -99,6 +99,10 @@ ID
 *.orig
 *~
 \#*#
+*.vpw
+*.vpj
+*.vtg
+*.vpwhistu
 
 #
 # Leavings from module signing

arch/x86/Kbuild

@@ -13,6 +13,10 @@ obj-$(CONFIG_LGUEST_GUEST) += lguest/
 # LCD support
 obj-$(CONFIG_LCD) += lcd/
 
+# LCD paravirtualization support
+obj-$(CONFIG_LCD_GUEST) += lcdguest/
+
+
 obj-y += realmode/
 obj-y += kernel/
 obj-y += mm/

arch/x86/kernel/head_64.S

@@ -490,6 +490,8 @@ ENTRY(phys_base)
 	.quad   0x0000000000000000
 
 #include "../../x86/xen/xen-head.S"
+
+#include "../../x86/lcd/lcd-head.S"
 	
 	__PAGE_ALIGNED_BSS
 NEXT_PAGE(empty_zero_page)

arch/x86/lcdguest/Kconfig

+config LCD_GUEST
+	bool "LCD guest (paravirtual Linux on LCD) support"
+	depends on X86_64
+	help
+	  Selecting this will allow your kernel to boot under lcd. 

arch/x86/lcdguest/Makefile

+# Make sure early boot has no stackprotector
+nostackp := $(call cc-option, -fno-stack-protector)
+CFLAGS_enlighten.o		:= $(nostackp)
+
+obj-y		:= enlighten.o
+

arch/x86/lcdguest/enlighten.c

+/*
+ * Core of LCD paravirt_ops implementation.
+ *
+ * Anton Burtsev <aburtsev@flux.utah.edu>, University of Utah 2014
+ */
+
+/* First C function to be called on Xen boot */
+asmlinkage void __init lcd_start_kernel(void)
+{
+	return;
+}
+

arch/x86/lcdguest/lcd-head.S

+/* LCD-specific pieces of head.S, intended to be included in the right
+	place in head.S */
+
+#ifdef CONFIG_LCD_GUEST
+
+#include <linux/elfnote.h>
+#include <linux/init.h>
+
+#include <asm/boot.h>
+#include <asm/asm.h>
+#include <asm/page_types.h>
+
+#include <xen/interface/elfnote.h>
+#include <asm/xen/interface.h>
+
+	__INIT
+ENTRY(startup_lcd)
+	cld
+/*
+#ifdef CONFIG_X86_32
+	mov %esi,xen_start_info
+	mov $init_thread_union+THREAD_SIZE,%esp
+#else
+	mov %rsi,xen_start_info
+	mov $init_thread_union+THREAD_SIZE,%rsp
+#endif*/
+	jmp lcd_start_kernel
+
+	__FINIT
+
+ELFNOTE(LCD, LCD_ELFNOTE_ENTRY,          _ASM_PTR startup_lcd)
+#endif /*CONFIG_LCD_GUEST */