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authorDavid Hildenbrand <dahi@linux.vnet.ibm.com>2014-01-23 12:26:52 +0100
committerChristian Borntraeger <borntraeger@de.ibm.com>2014-04-22 13:24:51 +0200
commit27291e2165b6de70c476b7b675308113edd69a60 (patch)
tree1508e3bb47e7171c176d82ab4fa231947a267140 /arch/s390/kvm/Makefile
parentaf1827e773c983f1d601d674447aea89efdb1acb (diff)
KVM: s390: hardware support for guest debugging
This patch adds support to debug the guest using the PER facility on s390. Single-stepping, hardware breakpoints and hardware watchpoints are supported. In order to use the PER facility of the guest without it noticing it, the control registers of the guest have to be patched and access to them has to be intercepted(stctl, stctg, lctl, lctlg). All PER program interrupts have to be intercepted and only the relevant PER interrupts for the guest have to be given back. Special care has to be taken about repeated exits on the same hardware breakpoint. The intervention of the host in the guests PER configuration is not fully transparent. PER instruction nullification can not be used by the guest and too many storage alteration events may be reported to the guest (if it is activated for special address ranges only) when the host concurrently debugging it. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/Makefile')
-rw-r--r--arch/s390/kvm/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/kvm/Makefile b/arch/s390/kvm/Makefile
index 83a7a355bef..b3b55346965 100644
--- a/arch/s390/kvm/Makefile
+++ b/arch/s390/kvm/Makefile
@@ -12,6 +12,6 @@ common-objs = $(KVM)/kvm_main.o $(KVM)/eventfd.o $(KVM)/async_pf.o $(KVM)/irqch
ccflags-y := -Ivirt/kvm -Iarch/s390/kvm
kvm-objs := $(common-objs) kvm-s390.o intercept.o interrupt.o priv.o sigp.o
-kvm-objs += diag.o gaccess.o
+kvm-objs += diag.o gaccess.o guestdbg.o
obj-$(CONFIG_KVM) += kvm.o