Commit 3945c416 authored by Avi Kivity's avatar Avi Kivity Committed by Greg Kroah-Hartman

KVM: SVM: Intercept the 'invd' and 'wbinvd' instructions

patch cf5a94d1 in mainline.

'invd' can destroy host data, and 'wbinvd' allows the guest to induce
long (milliseconds) latencies.

Noted by Ben Serebrin.
Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 141f41dd
......@@ -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 kvm_vcpu *vcpu,
[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 kvm_vcpu *vcpu,
[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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