twx-linux

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Sean Christopherson a709c46fdc KVM: VMX: Do not allow reexecute_instruction() when skipping MMIO instr

commit c4409905cd upstream.

Re-execution after an emulation decode failure is only intended to
handle a case where two or vCPUs race to write a shadowed page, i.e.
we should never re-execute an instruction as part of MMIO emulation.
As handle_ept_misconfig() is only used for MMIO emulation, it should
pass EMULTYPE_NO_REEXECUTE when using the emulator to skip an instr
in the fast-MMIO case where VM_EXIT_INSTRUCTION_LEN is invalid.

And because the cr2 value passed to x86_emulate_instruction() is only
destined for use when retrying or reexecuting, we can simply call
emulate_instruction().

Fixes: d391f12070 ("x86/kvm/vmx: do not use vm-exit instruction length
                      for fast MMIO when running nested")
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-09-19 22:43:36 +02:00

alpha

sys: don't hold uts_sem while accessing userspace memory

2018-09-09 19:56:00 +02:00

arc

arc: fix type warnings in arc/mm/cache.c

2018-09-05 09:26:31 +02:00

arm

Revert "ARM: imx_v6_v7_defconfig: Select ULPI support"

2018-09-15 09:45:36 +02:00

arm64

arm64: Handle mismatched cache type