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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fault-injection	docs: fault-injection: convert docs to ReST and rename to *.rst	2019-06-14 14:21:07 -06:00
ktest	ktest: Fix some typos in config-bisect.pl	2019-07-24 15:37:18 -04:00
nvdimm	libnvdimm fixes v5.4-rc1	2019-09-29 10:33:41 -07:00
radix-tree	Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-07-08 15:45:14 -07:00
scatterlist	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
selftests	selftests: kvm: fix sync_regs_test with newer gccs	2019-10-22 13:31:18 +02:00
vsock	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441	2019-06-05 17:37:17 +02:00