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Commit 4a494439 authored by David Hildenbrand's avatar David Hildenbrand Committed by Christian Borntraeger
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s390/mm: remember the int code for the last gmap fault 



For nested virtualization, we want to know if we are handling a protection
exception, because these can directly be forwarded to the guest without
additional checks.

Acked-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent 717c0555

arch/s390/include/asm/processor.h

+1 −0
Original line number Diff line number Diff line
@@ -110,6 +110,7 @@ struct thread_struct { 
	mm_segment_t mm_segment;

	unsigned long gmap_addr;	/* address of last gmap fault. */

	unsigned int gmap_write_flag;	/* gmap fault write indication */

	unsigned int gmap_int_code;	/* int code of last gmap fault */

	unsigned int gmap_pfault;	/* signal of a pending guest pfault */

	struct per_regs per_user;	/* User specified PER registers */

	struct per_event per_event;	/* Cause of the last PER trap */

arch/s390/mm/fault.c

+1 −0
Original line number Diff line number Diff line
@@ -419,6 +419,7 @@ static inline int do_exception(struct pt_regs *regs, int access) 
	if (gmap) {

		current->thread.gmap_addr = address;

		current->thread.gmap_write_flag = !!(flags & FAULT_FLAG_WRITE);

		current->thread.gmap_int_code = regs->int_code & 0xffff;

		address = __gmap_translate(gmap, address);

		if (address == -EFAULT) {

			fault = VM_FAULT_BADMAP;