linux/arch/s390
David Hildenbrand f71d0dc508 KVM: s390: no timer interrupts when single-stepping a guest
When a guest is single-stepped, we want to disable timer interrupts. Otherwise,
the guest will continuously execute the external interrupt handler and make
debugging of code where timer interrupts are enabled almost impossible.

The delivery of timer interrupts can be enforced in such sections by setting a
breakpoint and continuing execution.

In order to disable timer interrupts, they are disabled in the control register
of the guest just before SIE entry and are suppressed in the interrupt
check/delivery methods.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-04-22 13:24:52 +02:00
..
appldata s390/appldata_os: fix cpu array size calculation 2014-03-07 15:25:55 +01:00
boot s390/boot: Install bzImage as default kernel image 2013-11-15 14:08:36 +01:00
configs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-04-12 14:49:50 -07:00
crypto crypto: s390 - fix des and des3_ede ctr concurrency issue 2014-01-30 21:45:14 +08:00
hypfs hypfs: Add clarification for "weight_min" attribute 2014-03-17 15:53:03 +01:00
include KVM: s390: hardware support for guest debugging 2014-04-22 13:24:51 +02:00
kernel s390: add fields to lowcore definition 2014-04-22 13:24:49 +02:00
kvm KVM: s390: no timer interrupts when single-stepping a guest 2014-04-22 13:24:52 +02:00
lib s390/uaccess: fix possible register corruption in strnlen_user_srst() 2014-04-11 13:53:33 +02:00
math-emu s390: fix save and restore of the floating-point-control register 2013-10-24 17:17:11 +02:00
mm KVM: s390/mm: new gmap_test_and_clear_dirty function 2014-04-22 09:36:27 +02:00
net net: filter: add jited flag to indicate jit compiled filters 2014-03-31 00:45:08 -04:00
oprofile s390/irq: Use defines for external interruption codes 2014-04-03 14:30:52 +02:00
pci Driver core / sysfs patches for 3.15-rc1 2014-04-01 16:28:19 -07:00
defconfig s390: update defconfigs 2014-03-17 15:52:57 +01:00
Kbuild s390/pci: base support 2012-11-30 15:40:45 +01:00
Kconfig Merge git://git.infradead.org/users/eparis/audit 2014-04-12 12:38:53 -07:00
Kconfig.debug Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS 2013-04-30 17:04:09 -07:00
Makefile s390: allow to set gcc -mtune flag 2013-10-31 09:54:01 +01:00