Christian Borntraeger e1788bb995 KVM: s390: handle floating point registers in the run ioctl not in vcpu_put/load ... Right now we switch the host fprs/vrs in kvm_arch_vcpu_load and switch back in kvm_arch_vcpu_put. This process is already optimized since commit 9977e886cb ("s390/kernel: lazy restore fpu registers") avoiding double save/restores on schedule. We still reload the pointers and test the guest fpc on each context switch, though. We can minimize the cost of vcpu_load/put by doing the test in the VCPU_RUN ioctl itself. As most VCPU threads almost never exit to userspace in the common fast path, this allows to avoid this overhead for the common case (eventfd driven I/O, all exits including sleep handled in the kernel) - making kvm_arch_vcpu_load/put basically disappear in perf top. Also adapt the fpu get/set ioctls. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>		2016-11-22 19:32:35 +01:00
..
appldata	s390: Remove deprecated create_singlethread_workqueue	2016-09-06 10:59:57 +02:00
boot	s390: enable UBSAN	2016-09-20 14:26:23 +02:00
configs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2016-10-04 14:05:52 -07:00
crypto	s390/crypto: avoid returning garbage value	2016-09-06 11:00:00 +02:00
hypfs	s390/hypfs: Use get_free_page() instead of kmalloc to ensure page alignment	2016-10-28 10:08:58 +02:00
include	s390/dumpstack: get rid of return_address again	2016-10-17 14:44:33 +02:00
kernel	mm: kmemleak: scan .data.ro_after_init	2016-11-11 08:12:37 -08:00
kvm	KVM: s390: handle floating point registers in the run ioctl not in vcpu_put/load	2016-11-22 19:32:35 +01:00
lib	Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2016-10-14 14:26:58 -07:00
mm	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2016-10-27 14:16:30 -07:00
net	s390/bpf: fix recache skb->data/hlen for skb_vlan_push/pop	2016-05-19 09:14:27 +02:00
numa	s390/numa: only set possible nodes within node_possible_map	2016-07-31 05:28:00 -04:00
oprofile	s390/dumpstack: restore reliable indicator for call traces	2016-10-17 14:44:30 +02:00
pci	s390: pci: don't print uninitialized data for debugging	2016-11-11 08:45:08 -08:00
tools	s390/facilities: do not generate DWORDS define anymore	2016-07-31 05:27:59 -04:00
defconfig	mm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS	2016-08-30 10:10:21 -07:00
Kbuild	s390/numa: add core infrastructure	2015-08-03 18:40:25 +02:00
Kconfig	atomic64: no need for CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE	2016-10-07 18:46:30 -07:00
Kconfig.debug	arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug	2016-01-09 06:30:49 -08:00
Makefile	s390: add assembler include path for vx-insn.h	2016-09-06 11:00:04 +02:00