Merge 3.7-rc1 into tty-linus

This syncs up the tty-linus branch to the latest in Linus's tree to get all of
the UAPI stuff needed for the next set of patches to merge.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

4 files changed, 76 insertions, 8 deletions

diff --git a/arch/arm/boot/compressed/.gitignore b/arch/arm/boot/compressed/.gitignore
index d0d441c429a..f79a08efe00 100644
--- a/arch/arm/boot/compressed/.gitignore
+++ b/arch/arm/boot/compressed/.gitignore
@@ -1,6 +1,7 @@
 ashldi3.S
 font.c
 lib1funcs.S
+hyp-stub.S
 piggy.gzip
 piggy.lzo
 piggy.lzma
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index bb267562e7e..a517153a13e 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -30,6 +30,10 @@ FONTC	= $(srctree)/drivers/video/console/font_acorn_8x8.c
 OBJS		+= string.o
 CFLAGS_string.o	:= -Os
 
+ifeq ($(CONFIG_ARM_VIRT_EXT),y)
+OBJS		+= hyp-stub.o
+endif
+
 #
 # Architecture dependencies
 #
@@ -126,7 +130,7 @@ KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
 endif
 
 ccflags-y := -fpic -fno-builtin -I$(obj)
-asflags-y := -Wa,-march=all
+asflags-y := -Wa,-march=all -DZIMAGE
 
 # Supply kernel BSS size to the decompressor via a linker symbol.
 KBSS_SZ = $(shell $(CROSS_COMPILE)size $(obj)/../../../../vmlinux | \
@@ -198,3 +202,6 @@ $(obj)/font.c: $(FONTC)
 
 $(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/arm/boot/Makefile $(KCONFIG_CONFIG)
 	@sed "$(SEDFLAGS)" < $< > $@
+
+$(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S
+	$(call cmd,shipped)
diff --git a/arch/arm/boot/compressed/decompress.c b/arch/arm/boot/compressed/decompress.c
index f41b38cafce..9deb56a702c 100644
--- a/arch/arm/boot/compressed/decompress.c
+++ b/arch/arm/boot/compressed/decompress.c
@@ -32,6 +32,9 @@ extern void error(char *);
 #  define Tracecv(c,x)
 #endif
 
+/* Not needed, but used in some headers pulled in by decompressors */
+extern char * strstr(const char * s1, const char *s2);
+
 #ifdef CONFIG_KERNEL_GZIP
 #include "../../../../lib/decompress_inflate.c"
 #endif
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index bc67cbff394..90275f036cd 100644
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -9,6 +9,7 @@
  * published by the Free Software Foundation.
  */
 #include <linux/linkage.h>
+#include <asm/assembler.h>
 
 /*
  * Debugging stuff
@@ -132,7 +133,12 @@ start:
 		.word	start			@ absolute load/run zImage address
 		.word	_edata			@ zImage end address
  THUMB(		.thumb			)
-1:		mov	r7, r1			@ save architecture ID
+1:
+		mrs	r9, cpsr
+#ifdef CONFIG_ARM_VIRT_EXT
+		bl	__hyp_stub_install	@ get into SVC mode, reversibly
+#endif
+		mov	r7, r1			@ save architecture ID
 		mov	r8, r2			@ save atags pointer
 
 #ifndef __ARM_ARCH_2__
@@ -148,9 +154,9 @@ start:
  ARM(		swi	0x123456	)	@ angel_SWI_ARM
  THUMB(		svc	0xab		)	@ angel_SWI_THUMB
 not_angel:
-		mrs	r2, cpsr		@ turn off interrupts to
-		orr	r2, r2, #0xc0		@ prevent angel from running
-		msr	cpsr_c, r2
+		safe_svcmode_maskall r0
+		msr	spsr_cxsf, r9		@ Save the CPU boot mode in
+						@ SPSR
 #else
 		teqp	pc, #0x0c000003		@ turn off interrupts
 #endif
@@ -350,6 +356,20 @@ dtb_check_done:
 		adr	r5, restart
 		bic	r5, r5, #31
 
+/* Relocate the hyp vector base if necessary */
+#ifdef CONFIG_ARM_VIRT_EXT
+		mrs	r0, spsr
+		and	r0, r0, #MODE_MASK
+		cmp	r0, #HYP_MODE
+		bne	1f
+
+		bl	__hyp_get_vectors
+		sub	r0, r0, r5
+		add	r0, r0, r10
+		bl	__hyp_set_vectors
+1:
+#endif
+
 		sub	r9, r6, r5		@ size to copy
 		add	r9, r9, #31		@ rounded up to a multiple
 		bic	r9, r9, #31		@ ... of 32 bytes
@@ -458,11 +478,29 @@ not_relocated:	mov	r0, #0
 		bl	decompress_kernel
 		bl	cache_clean_flush
 		bl	cache_off
-		mov	r0, #0			@ must be zero
 		mov	r1, r7			@ restore architecture number
 		mov	r2, r8			@ restore atags pointer
- ARM(		mov	pc, r4	)		@ call kernel
- THUMB(		bx	r4	)		@ entry point is always ARM
+
+#ifdef CONFIG_ARM_VIRT_EXT
+		mrs	r0, spsr		@ Get saved CPU boot mode
+		and	r0, r0, #MODE_MASK
+		cmp	r0, #HYP_MODE		@ if not booted in HYP mode...
+		bne	__enter_kernel		@ boot kernel directly
+
+		adr	r12, .L__hyp_reentry_vectors_offset
+		ldr	r0, [r12]
+		add	r0, r0, r12
+
+		bl	__hyp_set_vectors
+		__HVC(0)			@ otherwise bounce to hyp mode
+
+		b	.			@ should never be reached
+
+		.align	2
+.L__hyp_reentry_vectors_offset:	.long	__hyp_reentry_vectors - .
+#else
+		b	__enter_kernel
+#endif
 
 		.align	2
 		.type	LC0, #object
@@ -1196,6 +1234,25 @@ memdump:	mov	r12, r0
 #endif
 
 		.ltorg
+
+#ifdef CONFIG_ARM_VIRT_EXT
+.align 5
+__hyp_reentry_vectors:
+		W(b)	.			@ reset
+		W(b)	.			@ undef
+		W(b)	.			@ svc
+		W(b)	.			@ pabort
+		W(b)	.			@ dabort
+		W(b)	__enter_kernel		@ hyp
+		W(b)	.			@ irq
+		W(b)	.			@ fiq
+#endif /* CONFIG_ARM_VIRT_EXT */
+
+__enter_kernel:
+		mov	r0, #0			@ must be 0
+ ARM(		mov	pc, r4	)		@ call kernel
+ THUMB(		bx	r4	)		@ entry point is always ARM
+
 reloc_code_end:
 
 		.align