Re: [PATCH Part2 RFC v4 31/40] KVM: X86: update page-fault trace to log the 64-bit error code
From: Sean Christopherson <seanjc@google.com>
Date: 2021-07-16 20:26:07
Also in:
kvm, linux-crypto, linux-efi, linux-mm, lkml, platform-driver-x86
On Wed, Jul 07, 2021, Brijesh Singh wrote:
The page-fault error code is a 64-bit value, but the trace prints only
It's worth clarifying that #NPT has a 64-bit error code, and so KVM also passes around a 64-bit PFEC. E.g. the above statement is wrong for legacy #PF.
the lower 32-bits. Some of the SEV-SNP RMP fault error codes are available in the upper 32-bits.
Can you send this separately with Cc: stable@? And I guess tweak the changelog to replace "SEV-SNP RMP" with a reference to e.g. PFERR_GUEST_FINAL_MASK. KVM already has error codes that can set the upper bits.