From: Brijesh Singh <brijesh.singh@amd.com>
To: Dave Hansen <dave.hansen@intel.com>,
x86@kernel.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, linux-efi@vger.kernel.org,
platform-driver-x86@vger.kernel.org, linux-coco@lists.linux.dev,
linux-mm@kvack.org
Cc: brijesh.singh@amd.com, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Joerg Roedel <jroedel@suse.de>,
Tom Lendacky <thomas.lendacky@amd.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Ard Biesheuvel <ardb@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Jim Mattson <jmattson@google.com>,
Andy Lutomirski <luto@kernel.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
Sergio Lopez <slp@redhat.com>, Peter Gonda <pgonda@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
David Rientjes <rientjes@google.com>,
Dov Murik <dovmurik@linux.ibm.com>,
Tobin Feldman-Fitzthum <tobin@ibm.com>,
Borislav Petkov <bp@alien8.de>,
Michael Roth <michael.roth@amd.com>,
Vlastimil Babka <vbabka@suse.cz>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
Andi Kleen <ak@linux.intel.com>,
"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
brijesh.ksingh@gmail.com, tony.luck@intel.com,
marcorr@google.com, sathyanarayanan.kuppuswamy@linux.intel.com
Subject: Re: [PATCH v11 42/45] virt: Add SEV-SNP guest driver
Date: Fri, 4 Mar 2022 09:43:39 -0600 [thread overview]
Message-ID: <2632b2e2-2224-9f6a-2ca0-cdaef3a24cf4@amd.com> (raw)
In-Reply-To: <bd52a9ed-c44f-989f-60a0-f15dd4260e09@intel.com>
On 3/4/22 9:23 AM, Dave Hansen wrote:
> On 3/4/22 05:17, Brijesh Singh wrote:
>>> BTW, this look like a generic allocator thingy. But it's only ever used
>>> to allocate a 'struct snp_guest_msg'. Why all the trouble to allocate
>>> and free one fixed-size structure? The changelog and comments don't
>>> shed any light.
>> The GHCB specification says that a guest must use shared memory for
>> request, response, and certificate blob. In this patch, you are seeing
>> that {alloc,free}_shared_pages() used only to alloc/free the request and
>> response page. In the last patch, we used the same generic function to
>> allocate the certificate blob with a different size (~16K) than 'struct
>> snp_guest_msg.'
> It sounds like it's worth a sentence or two in the changelog to explain
> this new "allocator" and its future uses.
Will do.
next prev parent reply other threads:[~2022-03-04 15:43 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-24 16:55 [PATCH v11 00/45] Add AMD Secure Nested Paging (SEV-SNP) Guest Support Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 01/45] KVM: SVM: Define sev_features and vmpl field in the VMSA Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 02/45] KVM: SVM: Create a separate mapping for the SEV-ES save area Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 03/45] KVM: SVM: Create a separate mapping for the GHCB " Brijesh Singh
2022-02-24 19:38 ` [PATCH v11 3.1/45] " Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 04/45] KVM: SVM: Update the SEV-ES save area mapping Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 05/45] x86/boot: Introduce helpers for MSR reads/writes Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 06/45] x86/boot: Use MSR read/write helpers instead of inline assembly Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 07/45] x86/compressed/64: Detect/setup SEV/SME features earlier in boot Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 08/45] x86/sev: " Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 09/45] x86/mm: Extend cc_attr to include AMD SEV-SNP Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 10/45] x86/sev: Define the Linux specific guest termination reasons Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 11/45] x86/sev: Save the negotiated GHCB version Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 12/45] x86/sev: Check SEV-SNP features support Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 13/45] x86/sev: Add a helper for the PVALIDATE instruction Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 14/45] x86/sev: Check the vmpl level Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 15/45] x86/compressed: Add helper for validating pages in the decompression stage Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 16/45] x86/compressed: Register GHCB memory when SEV-SNP is active Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 17/45] x86/sev: " Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 18/45] x86/sev: Add helper for validating pages in early enc attribute changes Brijesh Singh
2022-02-24 16:55 ` [PATCH v11 19/45] x86/kernel: Make the .bss..decrypted section shared in RMP table Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 20/45] x86/kernel: Validate ROM memory before accessing when SEV-SNP is active Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 21/45] x86/mm: Validate memory when changing the C-bit Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 22/45] x86/sev: Use SEV-SNP AP creation to start secondary CPUs Brijesh Singh
2022-03-03 17:09 ` Dave Hansen
2022-03-03 18:01 ` Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 23/45] x86/head/64: Re-enable stack protection Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 24/45] x86/compressed/acpi: Move EFI detection to helper Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 25/45] x86/compressed/acpi: Move EFI system table lookup " Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 26/45] x86/compressed/acpi: Move EFI config " Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 27/45] x86/compressed/acpi: Move EFI vendor " Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 28/45] x86/compressed/acpi: Move EFI kexec handling into common code Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 29/45] x86/boot: Add Confidential Computing type to setup_data Brijesh Singh
2022-03-01 9:48 ` Borislav Petkov
2022-03-02 14:25 ` Brijesh Singh
2022-03-02 15:13 ` Borislav Petkov
2022-03-03 9:21 ` Ard Biesheuvel
2022-02-24 16:56 ` [PATCH v11 30/45] KVM: x86: Move lookup of indexed CPUID leafs to helper Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 31/45] x86/sev: Move MSR-based VMGEXITs for CPUID " Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 32/45] x86/compressed/64: Add support for SEV-SNP CPUID table in #VC handlers Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 33/45] x86/boot: Add a pointer to Confidential Computing blob in bootparams Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 34/45] x86/compressed: Add SEV-SNP feature detection/setup Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 35/45] x86/compressed: Use firmware-validated CPUID leaves for SEV-SNP guests Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 36/45] x86/compressed: Export and rename add_identity_map() Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 37/45] x86/compressed/64: Add identity mapping for Confidential Computing blob Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 38/45] x86/sev: Add SEV-SNP feature detection/setup Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 39/45] x86/sev: Use firmware-validated CPUID for SEV-SNP guests Brijesh Singh
2022-03-03 11:51 ` Borislav Petkov
2022-03-04 0:31 ` Michael Roth
2022-03-04 7:43 ` Borislav Petkov
2022-02-24 16:56 ` [PATCH v11 40/45] x86/sev: Provide support for SNP guest request NAEs Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 41/45] x86/sev: Register SEV-SNP guest request platform device Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 42/45] virt: Add SEV-SNP guest driver Brijesh Singh
2022-03-02 10:03 ` Dov Murik
2022-03-02 14:33 ` Brijesh Singh
2022-03-03 17:33 ` Dave Hansen
2022-03-04 13:17 ` Brijesh Singh
2022-03-04 15:23 ` Dave Hansen
2022-03-04 15:43 ` Brijesh Singh [this message]
2022-02-24 16:56 ` [PATCH v11 43/45] virt: sevguest: Add support to derive key Brijesh Singh
2022-02-24 16:56 ` [PATCH v11 44/45] virt: sevguest: Add support to get extended report Brijesh Singh
2022-03-03 15:28 ` Borislav Petkov
2022-03-03 16:47 ` Brijesh Singh
2022-03-04 14:06 ` Borislav Petkov
2022-03-04 15:39 ` Brijesh Singh
2022-03-04 15:53 ` Borislav Petkov
2022-03-04 16:03 ` Brijesh Singh
2022-03-04 16:14 ` Borislav Petkov
2022-02-24 16:56 ` [PATCH v11 45/45] virt: sevguest: Add documentation for SEV-SNP CPUID Enforcement Brijesh Singh
2022-03-02 14:22 ` [PATCH v11 00/45] Add AMD Secure Nested Paging (SEV-SNP) Guest Support Borislav Petkov
2022-03-02 16:09 ` Paolo Bonzini
2022-03-02 16:14 ` Borislav Petkov
2022-04-03 22:36 ` Borislav Petkov
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