From: Xiaoyao Li <xiaoyao.li@intel•com>
To: Sean Christopherson <seanjc@google•com>,
Paolo Bonzini <pbonzini@redhat•com>,
Marc Zyngier <maz@kernel•org>,
Oliver Upton <oliver.upton@linux•dev>
Cc: kvm@vger•kernel.org, linux-arm-kernel@lists•infradead.org,
kvmarm@lists•linux.dev, linux-kernel@vger•kernel.org,
Ira Weiny <ira.weiny@intel•com>, Gavin Shan <gshan@redhat•com>,
Shivank Garg <shivankg@amd•com>, Vlastimil Babka <vbabka@suse•cz>,
David Hildenbrand <david@redhat•com>,
Fuad Tabba <tabba@google•com>,
Ackerley Tng <ackerleytng@google•com>,
Tao Chan <chentao@kylinos•cn>,
James Houghton <jthoughton@google•com>
Subject: Re: [PATCH v17 15/24] KVM: x86/mmu: Extend guest_memfd's max mapping level to shared mappings
Date: Wed, 30 Jul 2025 15:36:24 +0800 [thread overview]
Message-ID: <f61594a4-5823-453c-9f1f-8bd94d3ba4a2@intel.com> (raw)
In-Reply-To: <20250729225455.670324-16-seanjc@google.com>
On 7/30/2025 6:54 AM, Sean Christopherson wrote:
> Rework kvm_mmu_max_mapping_level() to consult guest_memfd for all mappings,
> not just private mappings, so that hugepage support plays nice with the
> upcoming support for backing non-private memory with guest_memfd.
>
> In addition to getting the max order from guest_memfd for gmem-only
> memslots, update TDX's hook to effectively ignore shared mappings, as TDX's
> restrictions on page size only apply to Secure EPT mappings. Do nothing
> for SNP, as RMP restrictions apply to both private and shared memory.
>
> Suggested-by: Ackerley Tng <ackerleytng@google•com>
> Signed-off-by: Sean Christopherson <seanjc@google•com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel•com>
next prev parent reply other threads:[~2025-07-30 7:39 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-29 22:54 [PATCH v17 00/24] KVM: Enable mmap() for guest_memfd Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 01/24] KVM: Rename CONFIG_KVM_PRIVATE_MEM to CONFIG_KVM_GUEST_MEMFD Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 02/24] KVM: x86: Have all vendor neutral sub-configs depend on KVM_X86, not just KVM Sean Christopherson
2025-07-31 8:08 ` Fuad Tabba
2025-07-29 22:54 ` [PATCH v17 03/24] KVM: x86: Select KVM_GENERIC_PRIVATE_MEM directly from KVM_SW_PROTECTED_VM Sean Christopherson
2025-07-31 8:08 ` Fuad Tabba
2025-07-29 22:54 ` [PATCH v17 04/24] KVM: x86: Select TDX's KVM_GENERIC_xxx dependencies iff CONFIG_KVM_INTEL_TDX=y Sean Christopherson
2025-07-31 8:07 ` Fuad Tabba
2025-07-29 22:54 ` [PATCH v17 05/24] KVM: Rename CONFIG_KVM_GENERIC_PRIVATE_MEM to CONFIG_HAVE_KVM_ARCH_GMEM_POPULATE Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 06/24] KVM: Rename kvm_slot_can_be_private() to kvm_slot_has_gmem() Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 07/24] KVM: Fix comments that refer to slots_lock Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 08/24] KVM: Fix comment that refers to kvm uapi header path Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 09/24] KVM: x86: Enable KVM_GUEST_MEMFD for all 64-bit builds Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 10/24] KVM: guest_memfd: Add plumbing to host to map guest_memfd pages Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 11/24] KVM: guest_memfd: Track guest_memfd mmap support in memslot Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 12/24] KVM: x86/mmu: Rename .private_max_mapping_level() to .gmem_max_mapping_level() Sean Christopherson
2025-07-31 8:15 ` Fuad Tabba
2025-07-31 8:29 ` David Hildenbrand
2025-07-31 8:33 ` Fuad Tabba
2025-07-29 22:54 ` [PATCH v17 13/24] KVM: x86/mmu: Hoist guest_memfd max level/order helpers "up" in mmu.c Sean Christopherson
2025-07-31 7:59 ` David Hildenbrand
2025-07-31 8:06 ` Fuad Tabba
2025-07-29 22:54 ` [PATCH v17 14/24] KVM: x86/mmu: Enforce guest_memfd's max order when recovering hugepages Sean Christopherson
2025-07-30 7:33 ` Xiaoyao Li
2025-07-31 8:06 ` David Hildenbrand
2025-07-31 8:10 ` Fuad Tabba
2025-07-29 22:54 ` [PATCH v17 15/24] KVM: x86/mmu: Extend guest_memfd's max mapping level to shared mappings Sean Christopherson
2025-07-30 7:36 ` Xiaoyao Li [this message]
2025-07-31 8:01 ` David Hildenbrand
2025-07-31 8:05 ` Fuad Tabba
2025-07-29 22:54 ` [PATCH v17 16/24] KVM: x86/mmu: Handle guest page faults for guest_memfd with shared memory Sean Christopherson
2025-07-30 7:37 ` Xiaoyao Li
2025-07-29 22:54 ` [PATCH v17 17/24] KVM: arm64: Refactor user_mem_abort() Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 18/24] KVM: arm64: Handle guest_memfd-backed guest page faults Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 19/24] KVM: arm64: nv: Handle VNCR_EL2-triggered faults backed by guest_memfd Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 20/24] KVM: arm64: Enable support for guest_memfd backed memory Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 21/24] KVM: Allow and advertise support for host mmap() on guest_memfd files Sean Christopherson
2025-07-29 22:54 ` [PATCH v17 22/24] KVM: selftests: Do not use hardcoded page sizes in guest_memfd test Sean Christopherson
2025-07-30 11:04 ` Xiaoyao Li
2025-07-29 22:54 ` [PATCH v17 23/24] KVM: selftests: guest_memfd mmap() test when mmap is supported Sean Christopherson
2025-07-30 11:39 ` Xiaoyao Li
2025-07-30 12:57 ` Sean Christopherson
2025-07-31 7:49 ` Xiaoyao Li
2025-08-07 8:12 ` Shivank Garg
2025-07-29 22:54 ` [PATCH v17 24/24] KVM: selftests: Add guest_memfd testcase to fault-in on !mmap()'d memory Sean Christopherson
2025-07-30 8:20 ` Xiaoyao Li
2025-07-30 15:51 ` Fuad Tabba
2026-03-30 6:21 ` Zenghui Yu
2026-04-17 16:47 ` Sean Christopherson
2026-05-12 7:28 ` Zenghui Yu
2026-05-12 15:53 ` Sean Christopherson
2025-07-30 21:34 ` [PATCH v17 00/24] KVM: Enable mmap() for guest_memfd Ackerley Tng
2025-07-30 22:44 ` Ackerley Tng
2025-08-27 8:43 ` Paolo Bonzini
2025-08-27 12:57 ` Sean Christopherson
2025-08-27 13:08 ` Marc Zyngier
2025-08-27 13:11 ` Paolo Bonzini
2025-08-27 13:14 ` Marc Zyngier
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