linux/arch/s390
Christian Borntraeger b9e5dc8d45 KVM: provide synchronous registers in kvm_run
On some cpus the overhead for virtualization instructions is in the same
range as a system call. Having to call multiple ioctls to get set registers
will make certain userspace handled exits more expensive than necessary.
Lets provide a section in kvm_run that works as a shared save area
for guest registers.
We also provide two 64bit flags fields (architecture specific), that will
specify
1. which parts of these fields are valid.
2. which registers were modified by userspace

Each bit for these flag fields will define a group of registers (like
general purpose) or a single register.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2012-03-05 14:52:22 +02:00
..
appldata sched/accounting: Change cpustat fields to an array 2011-12-06 09:06:38 +01:00
boot [S390] Remove Kerntypes leftovers 2011-12-27 11:27:12 +01:00
crypto [S390] crypto: avoid MSA3 and MSA4 instructions in ESA mode 2011-11-14 11:19:09 +01:00
hypfs vfs: switch ->show_options() to struct dentry * 2012-01-06 23:19:54 -05:00
include/asm KVM: provide synchronous registers in kvm_run 2012-03-05 14:52:22 +02:00
kernel compat: fix compile breakage on s390 2012-02-27 07:54:27 -08:00
kvm KVM: s390: rework code that sets the prefix 2012-03-05 14:52:21 +02:00
lib [S390] sparse: fix sparse warnings with __user pointers 2011-10-30 15:16:46 +01:00
math-emu s390: change to new flag variable 2011-03-17 14:02:57 +01:00
mm compat: fix compile breakage on s390 2012-02-27 07:54:27 -08:00
oprofile Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-01-06 08:02:58 -08:00
defconfig [S390] defconfig: switch on CONFIG_DEVTMPFS 2011-10-30 15:16:42 +01:00
Kbuild [S390] make arch/s390 subdirectories depend on config option 2011-12-27 11:27:12 +01:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2012-01-09 08:11:13 -08:00
Kconfig.debug [S390] Write protect module text and RO data 2011-03-15 17:08:23 +01:00
Makefile [S390] cleanup entry point definition 2012-01-18 18:03:41 +01:00