Messages in this thread | | | Date | Wed, 10 May 2023 11:35:15 +0200 | Subject | Re: [PATCH kernel v5 5/6] KVM: SEV: Enable data breakpoints in SEV-ES | From | "Gupta, Pankaj" <> |
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>> Enable DebugSwap for a VMSA but only do so if CPUID Fn80000021_EAX[0] >> ("NoNestedDataBp", "Processor ignores nested data breakpoints") is >> supported by the SOC as otherwise a malicious SEV-ES guest can set up >> data breakpoints on the #DB IDT entry/stack and cause an infinite loop. > > You mean #DB => #BP here Indeed its #DB. Was thinking something else.
Reviewed-by: Pankaj Gupta <pankaj.gupta@amd.com>
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