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Date:   Sat, 18 Mar 2023 05:00:18 +0000
To:     Jeremi Piotrowski <>
Subject: Re: [PATCH v2 RESEND] ptp: kvm: Use decrypted memory in confidential
 guest on x86


This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <>:

On Wed,  8 Mar 2023 15:05:31 +0000 you wrote:
> KVM_HC_CLOCK_PAIRING currently fails inside SEV-SNP guests because the
> guest passes an address to static data to the host. In confidential
> computing the host can't access arbitrary guest memory so handling the
> hypercall runs into an "rmpfault". To make the hypercall work, the guest
> needs to explicitly mark the memory as decrypted. Do that in
> kvm_arch_ptp_init(), but retain the previous behavior for
> non-confidential guests to save us from having to allocate memory.
> [...]

Here is the summary with links:
  - [v2,RESEND] ptp: kvm: Use decrypted memory in confidential guest on x86

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