From: Isaku Yamahata <isaku.yamahata@gmail.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>, Andy Lutomirski <luto@kernel.org>,
Dave Hansen <dave.hansen@intel.com>,
Sean Christopherson <seanjc@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Joerg Roedel <jroedel@suse.de>, Ard Biesheuvel <ardb@kernel.org>,
Andi Kleen <ak@linux.intel.com>,
Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@linux.intel.com>,
David Rientjes <rientjes@google.com>,
Vlastimil Babka <vbabka@suse.cz>,
Tom Lendacky <thomas.lendacky@amd.com>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
Dario Faggioli <dfaggioli@suse.com>,
Mike Rapoport <rppt@kernel.org>,
David Hildenbrand <david@redhat.com>,
Mel Gorman <mgorman@techsingularity.net>,
marcelo.cerri@canonical.com, tim.gardner@canonical.com,
khalid.elmously@canonical.com, philip.cox@canonical.com,
aarcange@redhat.com, peterx@redhat.com, x86@kernel.org,
linux-mm@kvack.org, linux-coco@lists.linux.dev,
linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
isaku.yamahata@gmail.com
Subject: Re: [PATCHv12 9/9] x86/tdx: Add unaccepted memory support
Date: Tue, 30 May 2023 17:58:37 -0700 [thread overview]
Message-ID: <20230531005837.GA1808127@ls.amr.corp.intel.com> (raw)
In-Reply-To: <20230518231434.26080-10-kirill.shutemov@linux.intel.com>
On Fri, May 19, 2023 at 02:14:34AM +0300,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> wrote:
> Hookup TDX-specific code to accept memory.
>
> Accepting the memory is the same process as converting memory from
> shared to private: kernel notifies VMM with MAP_GPA hypercall and then
> accept pages with ACCEPT_PAGE module call.
>
> THE implementation in core kernel uses tdx_enc_status_changed(). It
> already used for converting memory to shared and back for I/O
> transactions.
Because unaccepted memory reported in e820 means private[1], MAP_GPA isn't
needed to accept memory. (Or are you seeing TDX KVM/qemu issue?)
[1]TDX Virtual Firmware Design Guide.
7.2.1 Memroy Type in TD Resrouce HOB. Table 7-1: Mmeory Typein TD Resource HOB.
--
Isaku Yamahata <isaku.yamahata@gmail.com>
next prev parent reply other threads:[~2023-05-31 0:58 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-18 23:14 [PATCHv12 0/9] mm, x86/cc, efi: Implement support for unaccepted memory Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 1/9] mm: Add " Kirill A. Shutemov
2023-05-31 15:51 ` Borislav Petkov
2023-05-31 16:27 ` Kirill A. Shutemov
2023-05-31 17:50 ` Borislav Petkov
2023-05-31 18:10 ` [PATCHv12.1 " Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 2/9] efi/x86: Get full memory map in allocate_e820() Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 3/9] efi/libstub: Implement support for unaccepted memory Kirill A. Shutemov
2023-05-19 15:12 ` Tom Lendacky
2023-05-18 23:14 ` [PATCHv12 4/9] x86/boot/compressed: Handle " Kirill A. Shutemov
2023-05-19 10:16 ` Kirill A. Shutemov
2023-05-22 11:01 ` Kirill A. Shutemov
2023-05-22 11:08 ` Ard Biesheuvel
2023-05-18 23:14 ` [PATCHv12 5/9] efi: Add unaccepted memory support Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 6/9] efi/unaccepted: Avoid load_unaligned_zeropad() stepping into unaccepted memory Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 7/9] x86/tdx: Make _tdx_hypercall() and __tdx_module_call() available in boot stub Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 8/9] x86/tdx: Refactor try_accept_one() Kirill A. Shutemov
2023-05-18 23:14 ` [PATCHv12 9/9] x86/tdx: Add unaccepted memory support Kirill A. Shutemov
2023-05-31 0:58 ` Isaku Yamahata [this message]
2023-05-31 12:25 ` Kirill A. Shutemov
2023-05-19 16:24 ` [PATCH 1/6] x86/sev: Fix calculation of end address based on number of pages Tom Lendacky
2023-05-19 16:31 ` Tom Lendacky
2023-05-19 16:24 ` [PATCH 2/6] x86/sev: Put PSC struct on the stack in prep for unaccepted memory support Tom Lendacky
2023-05-19 16:24 ` [PATCH 3/6] x86/sev: Allow for use of the early boot GHCB for PSC requests Tom Lendacky
2023-05-19 16:24 ` [PATCH 4/6] x86/sev: Use large PSC requests if applicable Tom Lendacky
2023-05-19 16:24 ` [PATCH 5/6] x86/sev: Add SNP-specific unaccepted memory support Tom Lendacky
2023-05-19 16:24 ` [PATCH 6/6] x86/efi: Safely enable unaccepted memory in UEFI Tom Lendacky
2023-05-19 16:30 ` [RESEND PATCH v8 0/6] Provide SEV-SNP support for unaccepted memory Tom Lendacky
2023-05-19 16:30 ` [RESEND PATCH v8 1/6] x86/sev: Fix calculation of end address based on number of pages Tom Lendacky
2023-05-19 16:30 ` [RESEND PATCH v8 2/6] x86/sev: Put PSC struct on the stack in prep for unaccepted memory support Tom Lendacky
2023-05-19 16:30 ` [RESEND PATCH v8 3/6] x86/sev: Allow for use of the early boot GHCB for PSC requests Tom Lendacky
2023-05-19 16:30 ` [RESEND PATCH v8 4/6] x86/sev: Use large PSC requests if applicable Tom Lendacky
2023-06-06 10:46 ` Borislav Petkov
2023-05-19 16:30 ` [RESEND PATCH v8 5/6] x86/sev: Add SNP-specific unaccepted memory support Tom Lendacky
2023-05-19 16:30 ` [RESEND PATCH v8 6/6] x86/efi: Safely enable unaccepted memory in UEFI Tom Lendacky
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