linux/tools
Paolo Bonzini 204c91eff7 KVM: selftests: do not blindly clobber registers in guest asm
The guest_code of sync_regs_test is assuming that the compiler will not
touch %r11 outside the asm that increments it, which is a bit brittle.
Instead, we can increment a variable and use a dummy asm to ensure the
increment is not optimized away.  However, we also need to use a
callee-save register or the compiler will insert a save/restore around
the vmexit, breaking the whole idea behind the test.

(Yes, "if it ain't broken...", but I would like the test to be clean
before it is copied into the upcoming s390 selftests).

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-05-24 21:27:10 +02:00
..
accounting
arch Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 11:20:22 -07:00
bpf bpftool: exclude bash-completion/bpftool from .gitignore pattern 2019-05-04 23:43:57 -07:00
build
cgroup
crypto
debugging
firewire
firmware
gpio
hv
iio
include tools: bpf: synchronise BPF UAPI header with tools 2019-05-13 01:12:45 +02:00
io_uring tools/io_uring: remove IOCQE_FLAG_CACHEHIT 2019-04-08 10:48:50 -06:00
kvm/kvm_stat
laptop
leds
lib perf/core improvements and fixes: 2019-05-18 10:24:43 +02:00
memory-model tools/memory-model: Add support for synchronize_srcu_expedited() 2019-04-04 13:48:34 -07:00
nfsd
objtool Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 10:23:24 -07:00
pci perf/core improvements and fixes: 2019-05-18 10:24:43 +02:00
pcmcia
perf perf stat: Support 'percore' event qualifier 2019-05-16 14:17:24 -03:00
power Merge branch 'x86-mds-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-14 07:57:29 -07:00
scripts
spi
testing KVM: selftests: do not blindly clobber registers in guest asm 2019-05-24 21:27:10 +02:00
thermal/tmon
time
usb
virtio tools/virtio/ringtest: Remove bogus definition of BUG_ON() 2019-05-12 13:11:35 -04:00
vm
wmi
Makefile