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linux/arch/x86
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Paolo Bonzini c065b9947b KVM: x86: emulate #UD while in guest mode 
[ Upstream commit bd89525a82 ]

This reverts commits ae1f576707
and ac9b305caa.

If the hardware doesn't support MOVBE, but L0 sets CPUID.01H:ECX.MOVBE
in L1's emulated CPUID information, then L1 is likely to pass that
CPUID bit through to L2. L2 will expect MOVBE to work, but if L1
doesn't intercept #UD, then any MOVBE instruction executed in L2 will
raise #UD, and the exception will be delivered in L2.

Commit ac9b305caa is a better and more
complete version of ae1f576707 ("KVM: nVMX: Do not emulate #UD while
in guest mode"); however, neither considers the above case.

Suggested-by: Jim Mattson <jmattson@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2018-02-03 17:39:18 +01:00
..
boot x86/mm/pti: Add infrastructure for page table isolation 2018-01-02 20:30:56 +01:00
configs x86/unwind: Rename unwinder config options to 'CONFIG_UNWINDER_*' 2017-12-25 14:26:13 +01:00
crypto crypto: aesni - Fix out-of-bounds access of the AAD buffer in generic-gcm-aesni 2018-02-03 17:38:50 +01:00
entry x86/mce: Make machine check speculation protected 2018-01-23 19:58:20 +01:00
events perf/x86/amd/power: Do not load AMD power module on !AMD platforms 2018-01-31 14:03:49 +01:00
hyperv x86/virt: Add enum for hypervisors to replace x86_hyper 2017-12-25 14:26:20 +01:00
ia32 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
include x86/xen: Support early interrupts in xen pv guests 2018-02-03 17:39:17 +01:00
kernel x86/microcode: Fix again accessing initrd after having been freed 2018-01-31 14:03:49 +01:00
kvm KVM: x86: emulate #UD while in guest mode 2018-02-03 17:39:18 +01:00
lib kprobes/x86: Blacklist indirect thunk functions for kprobes 2018-01-23 19:58:20 +01:00
math-emu License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mm x86/xen: Support early interrupts in xen pv guests 2018-02-03 17:39:17 +01:00
net bpf: fix bpf_tail_call() x64 JIT 2017-10-03 16:04:44 -07:00
oprofile x86/oprofile/ppro: Do not use __this_cpu*() in preemptible context 2017-11-08 13:01:54 +01:00
pci x86/PCI: Make broadcom_postcore_init() check acpi_disabled 2017-12-14 09:52:53 +01:00
platform x86/pti: Unbreak EFI old_memmap 2018-01-17 09:45:27 +01:00
power x86/entry: Remap the TSS into the CPU entry area 2017-12-25 14:26:22 +01:00
purgatory License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ras License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
realmode License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tools License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
um x86/entry: Use SYSCALL_DEFINE() macros for sys_modify_ldt() 2017-12-10 13:40:41 +01:00
video x86/video: Don't assume all FB devices are PCI devices 2016-03-15 11:08:26 +01:00
xen x86/xen: Support early interrupts in xen pv guests 2018-02-03 17:39:17 +01:00
.gitignore x86/build: Add arch/x86/purgatory/ make generated files to gitignore 2014-10-09 09:29:46 +02:00
Kbuild Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-09-07 09:25:15 -07:00
Kconfig x86/retpoline: Add initial retpoline support 2018-01-17 09:45:29 +01:00
Kconfig.cpu License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig.debug x86/unwind: Make CONFIG_UNWINDER_ORC=y the default in kconfig for 64-bit 2017-12-25 14:26:14 +01:00
Makefile x86/retpoline: Remove compile time warning 2018-01-17 09:45:30 +01:00
Makefile.um License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile_32.cpu License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00