Received-SPF: pass (google.com: domain of linux-crypto+bounces-1884-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) client-ip=147.75.199.223;
Date: Tue, 6 Feb 2024 12:51:53 -0800
In-Reply-To: <20231230172351.574091-7-michael.roth@amd.com>
Precedence: bulk
Mime-Version: 1.0
References: <20231230172351.574091-1-michael.roth@amd.com> <20231230172351.574091-7-michael.roth@amd.com>
Message-ID: <ZcKb6VGbNZHlQkzg@google.com>
Subject: Re: [PATCH v11 06/35] KVM: x86/mmu: Pass around full 64-bit error
 code for KVM page faults
From: Sean Christopherson <seanjc@google.com>
To: Michael Roth <michael.roth@amd.com>
Cc: kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-mm@kvack.org, 
	linux-crypto@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, 
	tglx@linutronix.de, mingo@redhat.com, jroedel@suse.de, 
	thomas.lendacky@amd.com, hpa@zytor.com, ardb@kernel.org, pbonzini@redhat.com, 
	vkuznets@redhat.com, jmattson@google.com, luto@kernel.org, 
	dave.hansen@linux.intel.com, slp@redhat.com, pgonda@google.com, 
	peterz@infradead.org, srinivas.pandruvada@linux.intel.com, 
	rientjes@google.com, dovmurik@linux.ibm.com, tobin@ibm.com, bp@alien8.de, 
	vbabka@suse.cz, kirill@shutemov.name, ak@linux.intel.com, tony.luck@intel.com, 
	sathyanarayanan.kuppuswamy@linux.intel.com, alpergun@google.com, 
	jarkko@kernel.org, ashish.kalra@amd.com, nikunj.dadhania@amd.com, 
	pankaj.gupta@amd.com, liam.merwick@oracle.com, zhi.a.wang@intel.com, 
	Isaku Yamahata <isaku.yamahata@intel.com>
Content-Type: text/plain; charset="us-ascii"

On Sat, Dec 30, 2023, Michael Roth wrote:
> In some cases the full 64-bit error code for the KVM page fault will be
> needed to determine things like whether or not a fault was for a private
> or shared guest page, so update related code to accept the full 64-bit
> value so it can be plumbed all the way through to where it is needed.
> 
> The accessors of fault->error_code are changed as follows:
> 
> - FNAME(page_fault): change to explicitly use lower_32_bits() since that
>                      is no longer done in kvm_mmu_page_fault()
> - kvm_mmu_page_fault(): explicit mask with PFERR_RSVD_MASK,
>                         PFERR_NESTED_GUEST_PAGE
> - mmutrace: changed u32 -> u64
> 
> Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
> Link: https://lore.kernel.org/kvm/20230612042559.375660-1-michael.roth@amd.com/T/#mbd0b20c9a2cf50319d5d2a27b63f73c772112076
> [mdr: drop references/changes to code not in current gmem tree, update
>       commit message]
> Signed-off-by: Michael Roth <michael.roth@amd.com>

I assume Isaku is the original author?  If so, that's missing from this patch.