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| author | Xiaoyao Li <[email protected]> | 2020-04-10 11:54:01 +0000 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2020-04-11 14:40:55 +0000 |
| commit | 9de6fe3c28d6d8feadfad907961f1f31b85c6985 (patch) | |
| tree | 7f2d97a3a8e88b134b5309f72275c092fb454c2d /drivers/fpga/machxo2-spi.c | |
| parent | x86/split_lock: Provide handle_guest_split_lock() (diff) | |
| download | kernel-9de6fe3c28d6d8feadfad907961f1f31b85c6985.tar.gz kernel-9de6fe3c28d6d8feadfad907961f1f31b85c6985.zip | |
KVM: x86: Emulate split-lock access as a write in emulator
Emulate split-lock accesses as writes if split lock detection is on
to avoid #AC during emulation, which will result in a panic(). This
should never occur for a well-behaved guest, but a malicious guest can
manipulate the TLB to trigger emulation of a locked instruction[1].
More discussion can be found at [2][3].
[1] https://lkml.kernel.org/r/[email protected]
[2] https://lkml.kernel.org/r/[email protected]
[3] https://lkml.kernel.org/r/[email protected]
Suggested-by: Sean Christopherson <[email protected]>
Signed-off-by: Xiaoyao Li <[email protected]>
Signed-off-by: Sean Christopherson <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Paolo Bonzini <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/fpga/machxo2-spi.c')
0 files changed, 0 insertions, 0 deletions