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13 August 2024, 17:29:01 UTC
Revision c8c340a9b4149fe5caa433f3b62463a1c8e07a46 authored by Masahiro Kozuka on 14 September 2021, 21:09:51 UTC, committed by Paolo Bonzini on 21 October 2021, 17:01:25 UTC 
KVM: SEV: Flush cache on non-coherent systems before RECEIVE_UPDATE_DATA
 
Flush the destination page before invoking RECEIVE_UPDATE_DATA, as the
PSP encrypts the data with the guest's key when writing to guest memory.
If the target memory was not previously encrypted, the cache may contain
dirty, unecrypted data that will persist on non-coherent systems.

Fixes: 15fb7de1a7f5 ("KVM: SVM: Add KVM_SEV_RECEIVE_UPDATE_DATA command")
Cc: stable@vger.kernel.org
Cc: Peter Gonda <pgonda@google.com>
Cc: Marc Orr <marcorr@google.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Masahiro Kozuka <masa.koz@kozuka.jp>
[sean: converted bug report to changelog]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210914210951.2994260-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 parent a3ca528
History
Tip revision: c8c340a9b4149fe5caa433f3b62463a1c8e07a46 authored by Masahiro Kozuka on 14 September 2021, 21:09:51 UTC
KVM: SEV: Flush cache on non-coherent systems before RECEIVE_UPDATE_DATA
Tip revision: c8c340a
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