Messages in this thread Patch in this message | | | Date | Wed, 12 Dec 2007 22:51:58 -0800 | From | Greg KH <> | Subject | [patch 20/60] KVM: SVM: Intercept the invd and wbinvd instructions |
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2.6.23-stable review patch. If anyone has any objections, please let us know.
------------------ From: Avi Kivity <avi@qumranet.com>
patch cf5a94d1331b411b84414c13e43f578260942d6b in mainline.
'invd' can destroy host data, and 'wbinvd' allows the guest to induce long (milliseconds) latencies.
Noted by Ben Serebrin.
Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/kvm/svm.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/kvm/svm.c +++ b/drivers/kvm/svm.c @@ -506,6 +506,7 @@ static void init_vmcb(struct vmcb *vmcb) */ /* (1ULL << INTERCEPT_SELECTIVE_CR0) | */ (1ULL << INTERCEPT_CPUID) | + (1ULL << INTERCEPT_INVD) | (1ULL << INTERCEPT_HLT) | (1ULL << INTERCEPT_INVLPGA) | (1ULL << INTERCEPT_IOIO_PROT) | @@ -519,6 +520,7 @@ static void init_vmcb(struct vmcb *vmcb) (1ULL << INTERCEPT_STGI) | (1ULL << INTERCEPT_CLGI) | (1ULL << INTERCEPT_SKINIT) | + (1ULL << INTERCEPT_WBINVD) | (1ULL << INTERCEPT_MONITOR) | (1ULL << INTERCEPT_MWAIT); @@ -1319,6 +1321,7 @@ static int (*svm_exit_handlers[])(struct [SVM_EXIT_VINTR] = interrupt_window_interception, /* [SVM_EXIT_CR0_SEL_WRITE] = emulate_on_interception, */ [SVM_EXIT_CPUID] = cpuid_interception, + [SVM_EXIT_INVD] = emulate_on_interception, [SVM_EXIT_HLT] = halt_interception, [SVM_EXIT_INVLPG] = emulate_on_interception, [SVM_EXIT_INVLPGA] = invalid_op_interception, @@ -1333,6 +1336,7 @@ static int (*svm_exit_handlers[])(struct [SVM_EXIT_STGI] = invalid_op_interception, [SVM_EXIT_CLGI] = invalid_op_interception, [SVM_EXIT_SKINIT] = invalid_op_interception, + [SVM_EXIT_WBINVD] = emulate_on_interception, [SVM_EXIT_MONITOR] = invalid_op_interception, [SVM_EXIT_MWAIT] = invalid_op_interception, }; --
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