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Commit dcae7f2d authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 

Pull s390 fixes from Martin Schwidefsky:
 "Three kvm related memory management fixes, a fix for show_trace, a fix
  for early console output and a patch from Ben to help prevent compile
  errors in regard to irq functions (or our lack thereof)"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/pci: Implement IRQ functions if !PCI
  s390/sclp: fix new line detection
  s390/pgtable: make pgste lock an explicit barrier
  s390/pgtable: Save pgste during modify_prot_start/commit
  s390/dumpstack: fix address ranges for asynchronous and panic stack
  s390/pgtable: Fix guest overindication for change bit
parents 509768f7 c46b54f7

arch/s390/include/asm/pgtable.h

+22 −10
Original line number Diff line number Diff line
@@ -623,7 +623,7 @@ static inline pgste_t pgste_get_lock(pte_t *ptep) 
		"	csg	%0,%1,%2\n"

		"	jl	0b\n"

		: "=&d" (old), "=&d" (new), "=Q" (ptep[PTRS_PER_PTE])

		: "Q" (ptep[PTRS_PER_PTE]) : "cc");

		: "Q" (ptep[PTRS_PER_PTE]) : "cc", "memory");

#endif

	return __pgste(new);

}
@@ -635,11 +635,19 @@ static inline void pgste_set_unlock(pte_t *ptep, pgste_t pgste) 
		"	nihh	%1,0xff7f\n"	/* clear RCP_PCL_BIT */

		"	stg	%1,%0\n"

		: "=Q" (ptep[PTRS_PER_PTE])

		: "d" (pgste_val(pgste)), "Q" (ptep[PTRS_PER_PTE]) : "cc");

		: "d" (pgste_val(pgste)), "Q" (ptep[PTRS_PER_PTE])

		: "cc", "memory");

	preempt_enable();

#endif

}



static inline void pgste_set(pte_t *ptep, pgste_t pgste)

{

#ifdef CONFIG_PGSTE

	*(pgste_t *)(ptep + PTRS_PER_PTE) = pgste;

#endif

}



static inline pgste_t pgste_update_all(pte_t *ptep, pgste_t pgste)

{

#ifdef CONFIG_PGSTE
@@ -704,16 +712,18 @@ static inline void pgste_set_key(pte_t *ptep, pgste_t pgste, pte_t entry) 
{

#ifdef CONFIG_PGSTE

	unsigned long address;

	unsigned long okey, nkey;

	unsigned long nkey;



	if (pte_val(entry) & _PAGE_INVALID)

		return;

	VM_BUG_ON(!(pte_val(*ptep) & _PAGE_INVALID));

	address = pte_val(entry) & PAGE_MASK;

	okey = nkey = page_get_storage_key(address);

	nkey &= ~(_PAGE_ACC_BITS | _PAGE_FP_BIT);

	/* Set page access key and fetch protection bit from pgste */

	nkey |= (pgste_val(pgste) & (RCP_ACC_BITS | RCP_FP_BIT)) >> 56;

	if (okey != nkey)

	/*

	 * Set page access key and fetch protection bit from pgste.

	 * The guest C/R information is still in the PGSTE, set real

	 * key C/R to 0.

	 */

	nkey = (pgste_val(pgste) & (RCP_ACC_BITS | RCP_FP_BIT)) >> 56;

	page_set_storage_key(address, nkey, 0);

#endif

}
@@ -1099,8 +1109,10 @@ static inline pte_t ptep_modify_prot_start(struct mm_struct *mm, 
	if (!mm_exclusive(mm))

		__ptep_ipte(address, ptep);



	if (mm_has_pgste(mm))

	if (mm_has_pgste(mm)) {

		pgste = pgste_update_all(&pte, pgste);

		pgste_set(ptep, pgste);

	}

	return pte;

}

arch/s390/kernel/dumpstack.c

+8 −4
Original line number Diff line number Diff line
@@ -74,6 +74,8 @@ __show_trace(unsigned long sp, unsigned long low, unsigned long high) 


static void show_trace(struct task_struct *task, unsigned long *stack)

{

	const unsigned long frame_size =

		STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);

	register unsigned long __r15 asm ("15");

	unsigned long sp;
@@ -82,11 +84,13 @@ static void show_trace(struct task_struct *task, unsigned long *stack) 
		sp = task ? task->thread.ksp : __r15;

	printk("Call Trace:\n");

#ifdef CONFIG_CHECK_STACK

	sp = __show_trace(sp, S390_lowcore.panic_stack - 4096,

			  S390_lowcore.panic_stack);

	sp = __show_trace(sp,

			  S390_lowcore.panic_stack + frame_size - 4096,

			  S390_lowcore.panic_stack + frame_size);

#endif

	sp = __show_trace(sp, S390_lowcore.async_stack - ASYNC_SIZE,

			  S390_lowcore.async_stack);

	sp = __show_trace(sp,

			  S390_lowcore.async_stack + frame_size - ASYNC_SIZE,

			  S390_lowcore.async_stack + frame_size);

	if (task)

		__show_trace(sp, (unsigned long) task_stack_page(task),

			     (unsigned long) task_stack_page(task) + THREAD_SIZE);

arch/s390/kernel/irq.c

+64 −0
Original line number Diff line number Diff line
@@ -311,3 +311,67 @@ void measurement_alert_subclass_unregister(void) 
	spin_unlock(&ma_subclass_lock);

}

EXPORT_SYMBOL(measurement_alert_subclass_unregister);



void synchronize_irq(unsigned int irq)

{

	/*

	 * Not needed, the handler is protected by a lock and IRQs that occur

	 * after the handler is deleted are just NOPs.

	 */

}

EXPORT_SYMBOL_GPL(synchronize_irq);



#ifndef CONFIG_PCI



/* Only PCI devices have dynamically-defined IRQ handlers */



int request_irq(unsigned int irq, irq_handler_t handler,

		unsigned long irqflags, const char *devname, void *dev_id)

{

	return -EINVAL;

}

EXPORT_SYMBOL_GPL(request_irq);



void free_irq(unsigned int irq, void *dev_id)

{

	WARN_ON(1);

}

EXPORT_SYMBOL_GPL(free_irq);



void enable_irq(unsigned int irq)

{

	WARN_ON(1);

}

EXPORT_SYMBOL_GPL(enable_irq);



void disable_irq(unsigned int irq)

{

	WARN_ON(1);

}

EXPORT_SYMBOL_GPL(disable_irq);



#endif /* !CONFIG_PCI */



void disable_irq_nosync(unsigned int irq)

{

	disable_irq(irq);

}

EXPORT_SYMBOL_GPL(disable_irq_nosync);



unsigned long probe_irq_on(void)

{

	return 0;

}

EXPORT_SYMBOL_GPL(probe_irq_on);



int probe_irq_off(unsigned long val)

{

	return 0;

}

EXPORT_SYMBOL_GPL(probe_irq_off);



unsigned int probe_irq_mask(unsigned long val)

{

	return val;

}

EXPORT_SYMBOL_GPL(probe_irq_mask);

arch/s390/kernel/sclp.S

+1 −1
Original line number Diff line number Diff line
@@ -225,7 +225,7 @@ _sclp_print: 
	ahi	%r2,1

	ltr	%r0,%r0				# end of string?

	jz	.LfinalizemtoS4

	chi	%r0,0x15			# end of line (NL)?

	chi	%r0,0x0a			# end of line (NL)?

	jz	.LfinalizemtoS4

	stc	%r0,0(%r6,%r7)			# copy to mto

	la	%r11,0(%r6,%r7)

arch/s390/pci/pci.c

+0 −33
Original line number Diff line number Diff line
@@ -302,15 +302,6 @@ static int zpci_cfg_store(struct zpci_dev *zdev, int offset, u32 val, u8 len) 
	return rc;

}



void synchronize_irq(unsigned int irq)

{

	/*

	 * Not needed, the handler is protected by a lock and IRQs that occur

	 * after the handler is deleted are just NOPs.

	 */

}

EXPORT_SYMBOL_GPL(synchronize_irq);



void enable_irq(unsigned int irq)

{

	struct msi_desc *msi = irq_get_msi_desc(irq);
@@ -327,30 +318,6 @@ void disable_irq(unsigned int irq) 
}

EXPORT_SYMBOL_GPL(disable_irq);



void disable_irq_nosync(unsigned int irq)

{

	disable_irq(irq);

}

EXPORT_SYMBOL_GPL(disable_irq_nosync);



unsigned long probe_irq_on(void)

{

	return 0;

}

EXPORT_SYMBOL_GPL(probe_irq_on);



int probe_irq_off(unsigned long val)

{

	return 0;

}

EXPORT_SYMBOL_GPL(probe_irq_off);



unsigned int probe_irq_mask(unsigned long val)

{

	return val;

}

EXPORT_SYMBOL_GPL(probe_irq_mask);



void pcibios_fixup_bus(struct pci_bus *bus)

{

}