Revision - fd6b6d9 - KVM: VMX: check for existence of secondary exec controls before [...] - origin: https://github.com/torvalds/linux

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Revision fd6b6d9b82f97a851fb0078201ddc38fe9728cda authored by Sean Christopherson on 01 October 2018, 21:25:34 UTC, committed by Paolo Bonzini on 04 October 2018, 11:40:21 UTC

KVM: VMX: check for existence of secondary exec controls before accessing

Return early from vmx_set_virtual_apic_mode() if the processor doesn't
support VIRTUALIZE_APIC_ACCESSES or VIRTUALIZE_X2APIC_MODE, both of
which reside in SECONDARY_VM_EXEC_CONTROL.  This eliminates warnings
due to VMWRITEs to SECONDARY_VM_EXEC_CONTROL (VMCS field 401e) failing
on processors without secondary exec controls.

Remove the similar check for TPR shadowing as it is incorporated in the
flexpriority_enabled check and the APIC-related code in
vmx_update_msr_bitmap() is further gated by VIRTUALIZE_X2APIC_MODE.

Reported-by: Gerhard Wiesinger <redhat@wiesinger.com>
Fixes: 8d860bbeedef ("kvm: vmx: Basic APIC virtualization controls have three settings")
Cc: Jim Mattson <jmattson@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 parent daa07cb

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Tip revision: fd6b6d9b82f97a851fb0078201ddc38fe9728cda authored by Sean Christopherson on 01 October 2018, 21:25:34 UTC
KVM: VMX: check for existence of secondary exec controls before accessing

Tip revision: fd6b6d9

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kernel
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.clang-format	-rw-r--r--	12.8 KB
.cocciconfig	-rw-r--r--	59 bytes
.get_maintainer.ignore	-rw-r--r--	31 bytes
.gitattributes	-rw-r--r--	30 bytes
.gitignore	-rw-r--r--	1.5 KB
.mailmap	-rw-r--r--	9.7 KB
COPYING	-rw-r--r--	423 bytes
CREDITS	-rw-r--r--	96.4 KB
Kbuild	-rw-r--r--	2.2 KB
Kconfig	-rw-r--r--	563 bytes
MAINTAINERS	-rw-r--r--	458.9 KB
Makefile	-rw-r--r--	58.6 KB
README	-rw-r--r--	800 bytes

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KVM: VMX: check for existence of secondary exec controls before accessing

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