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AJvYcCXwKYcTFpioZHXoc8eWQrG/gkOT/RZtR0cjWECqrxAYw+ggkXs/yxjzESrkTxb2pwuYlIP7tgk8dc2rVumeirmwSzV30/Tmg0I2JLjV X-Gm-Message-State: AOJu0Yz/yKfjdtkHh/nHPAT8kpfwlp3ANM5CXdj4+NaZCXY8CXZ0sivR cIndz0WBdTNsOFhx6vdnJrr3g6Qubd0EtmSj5xuFyGLqlTd6DGqm7HZ7vNNULclDeJZPm3mM4Pw aBA== X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a17:903:2347:b0:1db:d7bf:45 with SMTP id c7-20020a170903234700b001dbd7bf0045mr3740plh.4.1708722951221; Fri, 23 Feb 2024 13:15:51 -0800 (PST) Reply-To: Sean Christopherson Date: Fri, 23 Feb 2024 13:15:47 -0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.44.0.rc0.258.g7320e95886-goog Message-ID: <20240223211547.3348606-1-seanjc@google.com> Subject: [GIT PULL] KVM: GUEST_MEMFD fixes for 6.8 From: Sean Christopherson To: Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Sean Christopherson X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1791725900309936633 X-GMAIL-MSGID: 1791725900309936633 Minor fixes related GUEST_MEMFD. I _just_ posted these, and they've only been in -next for one night, but I am sending this now to ensure you see it asap, as patch 1 in particular affects KVM's ABI, i.e. really should land in 6.8 before GUEST_MEMFD support is officially released. The following changes since commit c48617fbbe831d4c80fe84056033f17b70a31136: Merge tag 'kvmarm-fixes-6.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD (2024-02-21 05:18:56 -0500) are available in the Git repository at: https://github.com/kvm-x86/linux.git tags/kvm-x86-guest_memfd_fixes-6.8 for you to fetch changes up to 2dfd2383034421101300a3b7325cf339a182d218: KVM: selftests: Add a testcase to verify GUEST_MEMFD and READONLY are exclusive (2024-02-22 17:07:06 -0800) ---------------------------------------------------------------- KVM GUEST_MEMFD fixes for 6.8: - Make KVM_MEM_GUEST_MEMFD mutually exclusive with KVM_MEM_READONLY to avoid creating ABI that KVM can't sanely support. - Update documentation for KVM_SW_PROTECTED_VM to make it abundantly clear that such VMs are purely a development and testing vehicle, and come with zero guarantees. - Limit KVM_SW_PROTECTED_VM guests to the TDP MMU, as the long term plan is to support confidential VMs with deterministic private memory (SNP and TDX) only in the TDP MMU. - Fix a bug in a GUEST_MEMFD negative test that resulted in false passes when verifying that KVM_MEM_GUEST_MEMFD memslots can't be dirty logged. ---------------------------------------------------------------- Sean Christopherson (5): KVM: Make KVM_MEM_GUEST_MEMFD mutually exclusive with KVM_MEM_READONLY KVM: x86: Update KVM_SW_PROTECTED_VM docs to make it clear they're a WIP KVM: x86/mmu: Restrict KVM_SW_PROTECTED_VM to the TDP MMU KVM: selftests: Create GUEST_MEMFD for relevant invalid flags testcases KVM: selftests: Add a testcase to verify GUEST_MEMFD and READONLY are exclusive Documentation/virt/kvm/api.rst | 5 +++++ arch/x86/kvm/Kconfig | 7 ++++--- arch/x86/kvm/x86.c | 2 +- tools/testing/selftests/kvm/set_memory_region_test.c | 12 +++++++++++- virt/kvm/kvm_main.c | 8 +++++++- 5 files changed, 28 insertions(+), 6 deletions(-)