Merge branch 'linus' into WIP.x86/boot, to fix up conflicts and to pick up updates

 Conflicts:
	arch/x86/xen/setup.c

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 41 insertions, 25 deletions

diff --git a/arch/openrisc/kernel/entry.S b/arch/openrisc/kernel/entry.S
index aac0bde3330c..1b7160c79646 100644
--- a/arch/openrisc/kernel/entry.S
+++ b/arch/openrisc/kernel/entry.S
@@ -173,6 +173,11 @@ handler:							;\
 	l.j	_ret_from_exception				;\
 	 l.nop
 
+/* clobbers 'reg' */
+#define CLEAR_LWA_FLAG(reg)		\
+	l.movhi	reg,hi(lwa_flag)	;\
+	l.ori	reg,reg,lo(lwa_flag)	;\
+	l.sw	0(reg),r0
 /*
  * NOTE: one should never assume that SPR_EPC, SPR_ESR, SPR_EEAR
  *       contain the same values as when exception we're handling
@@ -193,6 +198,7 @@ EXCEPTION_ENTRY(_tng_kernel_start)
 /* ---[ 0x200: BUS exception ]------------------------------------------- */
 
 EXCEPTION_ENTRY(_bus_fault_handler)
+	CLEAR_LWA_FLAG(r3)
 	/* r4: EA of fault (set by EXCEPTION_HANDLE) */
 	l.jal   do_bus_fault
 	 l.addi  r3,r1,0 /* pt_regs */
@@ -202,11 +208,13 @@ EXCEPTION_ENTRY(_bus_fault_handler)
 
 /* ---[ 0x300: Data Page Fault exception ]------------------------------- */
 EXCEPTION_ENTRY(_dtlb_miss_page_fault_handler)
+	CLEAR_LWA_FLAG(r3)
 	l.and	r5,r5,r0
 	l.j	1f
 	 l.nop
 
 EXCEPTION_ENTRY(_data_page_fault_handler)
+	CLEAR_LWA_FLAG(r3)
 	/* set up parameters for do_page_fault */
 	l.ori	r5,r0,0x300		   // exception vector
 1:
@@ -220,7 +228,7 @@ EXCEPTION_ENTRY(_data_page_fault_handler)
 	 * DTLB miss handler in the CONFIG_GUARD_PROTECTED_CORE part
 	 */
 #ifdef CONFIG_OPENRISC_NO_SPR_SR_DSX
-	l.lwz   r6,PT_PC(r3)                  // address of an offending insn
+	l.lwz   r6,PT_PC(r3)               // address of an offending insn
 	l.lwz   r6,0(r6)                   // instruction that caused pf
 
 	l.srli  r6,r6,26                   // check opcode for jump insn
@@ -236,57 +244,57 @@ EXCEPTION_ENTRY(_data_page_fault_handler)
 	l.bf    8f
 	l.sfeqi r6,0x12                    // l.jalr
 	l.bf    8f
-
-	l.nop
+	 l.nop
 
 	l.j     9f
-	l.nop
-8:
+	 l.nop
 
-	l.lwz   r6,PT_PC(r3)                  // address of an offending insn
+8: // offending insn is in delay slot
+	l.lwz   r6,PT_PC(r3)               // address of an offending insn
 	l.addi  r6,r6,4
 	l.lwz   r6,0(r6)                   // instruction that caused pf
 	l.srli  r6,r6,26                   // get opcode
-9:
+9: // offending instruction opcode loaded in r6
 
 #else
 
-	l.mfspr r6,r0,SPR_SR		   // SR
-//	l.lwz	r6,PT_SR(r3)		   // ESR
-	l.andi	r6,r6,SPR_SR_DSX	   // check for delay slot exception
-	l.sfeqi	r6,0x1			   // exception happened in delay slot
-	l.bnf	7f
-	l.lwz	r6,PT_PC(r3)		   // address of an offending insn
+	l.lwz   r6,PT_SR(r3)               // SR
+	l.andi  r6,r6,SPR_SR_DSX           // check for delay slot exception
+	l.sfne  r6,r0                      // exception happened in delay slot
+	l.bnf   7f
+	 l.lwz  r6,PT_PC(r3)               // address of an offending insn
 
-	l.addi	r6,r6,4			   // offending insn is in delay slot
+	l.addi	r6,r6,4                    // offending insn is in delay slot
 7:
 	l.lwz   r6,0(r6)                   // instruction that caused pf
 	l.srli  r6,r6,26                   // check opcode for write access
 #endif
 
-	l.sfgeui r6,0x33		   // check opcode for write access
+	l.sfgeui r6,0x33                   // check opcode for write access
 	l.bnf   1f
 	l.sfleui r6,0x37
 	l.bnf   1f
 	l.ori   r6,r0,0x1                  // write access
 	l.j     2f
-	l.nop
+	 l.nop
 1:	l.ori   r6,r0,0x0                  // !write access
 2:
 
 	/* call fault.c handler in or32/mm/fault.c */
 	l.jal   do_page_fault
-	l.nop
+	 l.nop
 	l.j     _ret_from_exception
-	l.nop
+	 l.nop
 
 /* ---[ 0x400: Insn Page Fault exception ]------------------------------- */
 EXCEPTION_ENTRY(_itlb_miss_page_fault_handler)
+	CLEAR_LWA_FLAG(r3)
 	l.and	r5,r5,r0
 	l.j	1f
 	 l.nop
 
 EXCEPTION_ENTRY(_insn_page_fault_handler)
+	CLEAR_LWA_FLAG(r3)
 	/* set up parameters for do_page_fault */
 	l.ori	r5,r0,0x400		   // exception vector
 1:
@@ -296,23 +304,25 @@ EXCEPTION_ENTRY(_insn_page_fault_handler)
 
 	/* call fault.c handler in or32/mm/fault.c */
 	l.jal   do_page_fault
-	l.nop
+	 l.nop
 	l.j     _ret_from_exception
-	l.nop
+	 l.nop
 
 
 /* ---[ 0x500: Timer exception ]----------------------------------------- */
 
 EXCEPTION_ENTRY(_timer_handler)
+	CLEAR_LWA_FLAG(r3)
 	l.jal	timer_interrupt
 	 l.addi r3,r1,0 /* pt_regs */
 
 	l.j    _ret_from_intr
 	 l.nop
 
-/* ---[ 0x600: Aligment exception ]-------------------------------------- */
+/* ---[ 0x600: Alignment exception ]-------------------------------------- */
 
 EXCEPTION_ENTRY(_alignment_handler)
+	CLEAR_LWA_FLAG(r3)
 	/* r4: EA of fault (set by EXCEPTION_HANDLE) */
 	l.jal   do_unaligned_access
 	 l.addi  r3,r1,0 /* pt_regs */
@@ -321,8 +331,8 @@ EXCEPTION_ENTRY(_alignment_handler)
 	 l.nop
 
 #if 0
-EXCEPTION_ENTRY(_aligment_handler)
-//        l.mfspr r2,r0,SPR_EEAR_BASE     /* Load the efective addres */
+EXCEPTION_ENTRY(_alignment_handler)
+//        l.mfspr r2,r0,SPR_EEAR_BASE     /* Load the effective address */
 	l.addi	r2,r4,0
 //        l.mfspr r5,r0,SPR_EPCR_BASE     /* Load the insn address */
 	l.lwz   r5,PT_PC(r1)
@@ -509,6 +519,7 @@ EXCEPTION_ENTRY(_external_irq_handler)
 //	l.sw	PT_SR(r1),r4
 1:
 #endif
+	CLEAR_LWA_FLAG(r3)
 	l.addi	r3,r1,0
 	l.movhi	r8,hi(do_IRQ)
 	l.ori	r8,r8,lo(do_IRQ)
@@ -556,8 +567,12 @@ ENTRY(_sys_call_handler)
 	 * they should be clobbered, otherwise
 	 */
 	l.sw    PT_GPR3(r1),r3
-	/* r4 already saved */
-	/* r4 holds the EEAR address of the fault, load the original r4 */
+	/*
+	 * r4 already saved
+	 * r4 holds the EEAR address of the fault, use it as screatch reg and
+	 * then load the original r4
+	 */
+	CLEAR_LWA_FLAG(r4)
 	l.lwz	r4,PT_GPR4(r1)
 	l.sw    PT_GPR5(r1),r5
 	l.sw    PT_GPR6(r1),r6
@@ -776,6 +791,7 @@ UNHANDLED_EXCEPTION(_vector_0xd00,0xd00)
 /* ---[ 0xe00: Trap exception ]------------------------------------------ */
 
 EXCEPTION_ENTRY(_trap_handler)
+	CLEAR_LWA_FLAG(r3)
 	/* r4: EA of fault (set by EXCEPTION_HANDLE) */
 	l.jal   do_trap
 	 l.addi  r3,r1,0 /* pt_regs */