Vitaly Kuznetsov ef40598098 selftests: kvm: fix sync_regs_test with newer gccs ... Commit 204c91eff7 ("KVM: selftests: do not blindly clobber registers in guest asm") was intended to make test more gcc-proof, however, the result is exactly the opposite: on newer gccs (e.g. 8.2.1) the test breaks with ==== Test Assertion Failure ==== x86_64/sync_regs_test.c:168: run->s.regs.regs.rbx == 0xBAD1DEA + 1 pid=14170 tid=14170 - Invalid argument 1 0x00000000004015b3: main at sync_regs_test.c:166 (discriminator 6) 2 0x00007f413fb66412: ?? ??:0 3 0x000000000040191d: _start at ??:? rbx sync regs value incorrect 0x1. Apparently, compile is still free to play games with registers even when they have variables attached. Re-write guest code with 'asm volatile' by embedding ucall there and making sure rbx is preserved. Fixes: 204c91eff7 ("KVM: selftests: do not blindly clobber registers in guest asm") Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2019-10-22 13:31:18 +02:00
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accounting
arch	tools headers kvm: Sync kvm headers with the kernel sources	2019-09-30 17:29:30 -03:00
bpf	tools: bpf: Use !building_out_of_srctree to determine srctree	2019-09-30 10:53:34 +02:00
build
cgroup	iocost_monitor: Report debt	2019-09-10 12:31:39 -06:00
debugging
firewire
firmware
gpio
hv	- First round of vmbus hibernation support from Dexuan Cui.	2019-09-24 12:36:31 -07:00
iio
include	tools headers kvm: Sync kvm headers with the kernel sources	2019-09-30 17:29:30 -03:00
io_uring
kvm/kvm_stat
laptop
leds
lib	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2019-10-19 17:09:11 -04:00
memory-model
nfsd
objtool	KVM: x86: Check kvm_rebooting in kvm_spurious_fault()	2019-09-25 15:23:33 +02:00
pci
pcmcia
perf	perf annotate: Don't return -1 for error when doing BPF disassembly	2019-09-30 17:30:06 -03:00
power	platform-drivers-x86 for v5.4-2	2019-09-24 12:39:40 -07:00
scripts
spi
testing	selftests: kvm: fix sync_regs_test with newer gccs	2019-10-22 13:31:18 +02:00
thermal/tmon
time
usb
virtio	tools/virtio: xen stub	2019-10-13 09:38:27 -04:00
vm
wmi
Makefile