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From: KVM Man <kvmman602@gmail.com>
To: kvm@vger.kernel.org
Subject: kvm_read_guest_virt returning unexpected data
Date: Wed, 21 Jul 2021 09:20:18 -0500	[thread overview]
Message-ID: <CAN-39qaEWAcKxB6cw64tD14VCDiVHZ9zj43a=j475j+FWVWJeg@mail.gmail.com> (raw)

Hi,

I'm making changes to KVM on linux 5.11.4 while using qemu 5.0.0 and
having issues using kvm_read_guest_virt successfully with an x86_64 VM
guest.

I call kvm_read_guest_virt in a VM exit handler, and it returns data
that's unexpected, as compared to what I see with a kernel debugger
attached to the guest. The function returns a successful error code
(X86EMUL_CONTINUE), and I've verified that virtual to physical address
translation is working properly when kvm_read_guest_virt_helper calls
vcpu->arch.walk_mmu->gva_to_gpa.

Are there any reasons that this function would not work as expected?

Thanks.

                 reply	other threads:[~2021-07-21 14:20 UTC|newest]

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