From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej1-f73.google.com (mail-ej1-f73.google.com [209.85.218.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E5690207E03 for ; Mon, 16 Dec 2024 17:58:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734371888; cv=none; b=tE8k6O15CCh8VBOvXTczNeyfoshZNyRND3WTqkSnt97bY7qc7CY/SLNeBzlK3KPaKmyyEsf5b6OWBf3mJghxXt5+T4FCinjCS/8j198AWM2UlfHVJRTauZuKa0VshfQxIhl6N89WVsyxL0Hx3Jn7xtZ/6VUTcZqXRKn1++NJMcQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734371888; c=relaxed/simple; bh=7tIt7bChg8ottnajrUmnj8LyLrDCeA8W2VS5FD0IT+c=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=GPCPwdvxKn9462dJ/DXPG8LrgrW1aQnjOXSRgv89okoxJ7DmNJaD3ivm+TTxqG5bAe4QW7o4+6l2IZO7fnDiofcpWbR7apydKJzt+hgnMlNmTTAuzLLP4kjwcEmm4YUaIpIj+yStpha8RilX+KI6pVrXYxPfo7QGYg1/Jc8Y8No= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--qperret.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=0zsy0toF; arc=none smtp.client-ip=209.85.218.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--qperret.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="0zsy0toF" Received: by mail-ej1-f73.google.com with SMTP id a640c23a62f3a-aa698b61931so316435166b.2 for ; Mon, 16 Dec 2024 09:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1734371885; x=1734976685; darn=lists.linux.dev; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=WIvO63JbCPAYWlPtJwQFaD85WRtYv7NId9N6OYZZ/Zg=; b=0zsy0toFIBlIzXh6irTtmqqoAKjh/j30Lw+6GXFMditkOgkzWleias+03dqXS6XCVK GXX53V/rAqcGUGRxNybjYHRevlBUsUzg2nW2XO2kI7zwnUb+t0sd+sILz/BZFpgHDlcc 9XPzqm0wI/Joc23Z5xsweXJBsHT+5p8FsA6Qk5eGnyOT1NlQLip8fFsW5pqLcjvGhBbz rJcDXEvBJsBJ90TCF3fsZajyONQo8hYr9fOK4xSNFvwWxw0tZHRebGbJ+7KFuaD53fEi IP6q3g+XgpFzdL9Pc2mOe6tJKUKJWuZGbTtPILxxWasg7uunCY4i2jCCJWbhr9HEY77A uLcQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1734371885; x=1734976685; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=WIvO63JbCPAYWlPtJwQFaD85WRtYv7NId9N6OYZZ/Zg=; b=NdsBWtda4SzT8agThvNyFDrfwtLYfyt3sz2R/dMeQPzFxLxcCbsDMtO6t2oRlOtNaF r04LeGe/v/8pgRjSHpMVxf4/h6C2r8DAGRUK5f+l1bj9zP/QFHhmXn29zQk7QssKUPZZ 1KmYRCAFPL+aFFlEIX3D2CAaC0tP2OBd48m5xd9VhMy4RlWMsLUBJNq1cfNFEsuHSThJ NSwm2+53Pt/tVsTkvBtfUF1OOWzyfasDC+Er/uFhrVpjyTDxHgJqFvSimwUlpXPCsgOo OGQGP3kJbpnFKlFLnpWBcTETCRYxjL37MON6RcTOT/cPwqT1/PuwCbZJTZeCfMyK5nJw uTxg== X-Forwarded-Encrypted: i=1; AJvYcCUJ5FfQTh4zHVtyFsThFYnIswmRe/Pn0Pn8UA4WBzVMbIx//5DnB3t9OH2H/Q2Lm7ExlU+1qeU=@lists.linux.dev X-Gm-Message-State: AOJu0YzA4AjGLfArBNWCCZaEZCmO/+Nx5rdjDnjTuVThP2EXuv2ilmmF BXIxgKSRAx/DtjZRWpEZJIM2nN7iTUwFdxEf2pIEIpBKG4UiBpWhxihu90K1tM4fMVLMAZtlA2U j10qH0A== X-Google-Smtp-Source: AGHT+IEFD4waSVQTOAsVyudNcn7ejn8ek5PuLwOxwXNXNljOaLhuHKDLNM7nryfElBbu4DGNYAQqJVhQvzfM X-Received: from educ20.prod.google.com ([2002:a05:6402:1014:b0:5d0:84dd:d775]) (user=qperret job=prod-delivery.src-stubby-dispatcher) by 2002:a17:907:7f0c:b0:aa6:5e35:d72d with SMTP id a640c23a62f3a-aab7793eb42mr1425279566b.24.1734371885432; Mon, 16 Dec 2024 09:58:05 -0800 (PST) Date: Mon, 16 Dec 2024 17:57:45 +0000 Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.47.1.613.gc27f4b7a9f-goog Message-ID: <20241216175803.2716565-1-qperret@google.com> Subject: [PATCH v3 00/18] KVM: arm64: Non-protected guest stage-2 support for pKVM From: Quentin Perret To: Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon Cc: Fuad Tabba , Vincent Donnefort , Sebastian Ene , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Hi all, This is the v3 of the series adding support for non-protected guests stage-2 to pKVM. Please refer to v1 for all the context: https://lore.kernel.org/kvmarm/20241104133204.85208-1-qperret@google.com/ The series is organized as follows: - Patches 01 to 04 move the host ownership state tracking from the host's stage-2 page-table to the hypervisor's vmemmap. This avoids fragmenting the host stage-2 for shared pages, which is only needed to store an annotation in the SW bits of the corresponding PTE. All pages mapped into non-protected guests are shared from pKVM's PoV, so the cost of stage-2 fragmentation will increase massively as we start tracking that at EL2. Note that these patches also help with the existing sharing for e.g. FF-A, so they could possibly be merged separately from the rest of the series. - Patches 05 to 07 implement a minor refactoring of the pgtable code to ease the integration of the pKVM MMU later on. - Patches 08 to 16 introduce all the infrastructure needed on the pKVM side for handling guest stage-2 page-tables at EL2. - Patches 17 and 18 plumb the newly introduced pKVM support into KVM/arm64. Patches based on 6.13-rc3, tested on Pixel 6 and Qemu. Changes in v3: - Rebased on 6.13-rc3 - Applied Marc's rework of the for_each_mapping_in_range() macro mess - Removed mappings_lock in favor the mmu_lock - Dropped BUG_ON() from pkvm_mkstate() - Renamed range_is_allowed_memory() and clarified the comment inside it - Explicitly bail out when using host_stage2_set_owner_locked() on non-memory regions - Check PKVM_NOPAGE state as an equality rather than a bitwise operator - Reworked __pkvm_host_share_guest() to return -EPERM in case of illegal multi-sharing - Added get_np_pkvm_hyp_vm() to simplify HVC error handling in hyp-main.c - Cosmetic changes and improved coding consitency thoughout the series Changes in v2: - Rebased on 6.13-rc1 (small conflicts with 2362506f7cff ("KVM: arm64: Don't mark "struct page" accessed when making SPTE young") in particular) - Fixed kerneldoc breakage for __unmap_stage2_range() - Fixed pkvm_pgtable_test_clear_young() to use correct HVC - Folded guest_get_valid_pte() into __check_host_unshare_guest() for clarity Thanks, Quentin Marc Zyngier (1): KVM: arm64: Introduce __pkvm_vcpu_{load,put}() Quentin Perret (17): KVM: arm64: Change the layout of enum pkvm_page_state KVM: arm64: Move enum pkvm_page_state to memory.h KVM: arm64: Make hyp_page::order a u8 KVM: arm64: Move host page ownership tracking to the hyp vmemmap KVM: arm64: Pass walk flags to kvm_pgtable_stage2_mkyoung KVM: arm64: Pass walk flags to kvm_pgtable_stage2_relax_perms KVM: arm64: Make kvm_pgtable_stage2_init() a static inline function KVM: arm64: Add {get,put}_pkvm_hyp_vm() helpers KVM: arm64: Introduce __pkvm_host_share_guest() KVM: arm64: Introduce __pkvm_host_unshare_guest() KVM: arm64: Introduce __pkvm_host_relax_guest_perms() KVM: arm64: Introduce __pkvm_host_wrprotect_guest() KVM: arm64: Introduce __pkvm_host_test_clear_young_guest() KVM: arm64: Introduce __pkvm_host_mkyoung_guest() KVM: arm64: Introduce __pkvm_tlb_flush_vmid() KVM: arm64: Introduce the EL1 pKVM MMU KVM: arm64: Plumb the pKVM MMU in KVM arch/arm64/include/asm/kvm_asm.h | 9 + arch/arm64/include/asm/kvm_host.h | 4 + arch/arm64/include/asm/kvm_mmu.h | 16 + arch/arm64/include/asm/kvm_pgtable.h | 38 ++- arch/arm64/include/asm/kvm_pkvm.h | 23 ++ arch/arm64/kvm/arm.c | 23 +- arch/arm64/kvm/hyp/include/nvhe/gfp.h | 6 +- arch/arm64/kvm/hyp/include/nvhe/mem_protect.h | 38 +-- arch/arm64/kvm/hyp/include/nvhe/memory.h | 42 ++- arch/arm64/kvm/hyp/include/nvhe/pkvm.h | 16 + arch/arm64/kvm/hyp/nvhe/hyp-main.c | 201 ++++++++++- arch/arm64/kvm/hyp/nvhe/mem_protect.c | 320 ++++++++++++++++-- arch/arm64/kvm/hyp/nvhe/page_alloc.c | 14 +- arch/arm64/kvm/hyp/nvhe/pkvm.c | 68 ++++ arch/arm64/kvm/hyp/nvhe/setup.c | 7 +- arch/arm64/kvm/hyp/pgtable.c | 13 +- arch/arm64/kvm/mmu.c | 113 +++++-- arch/arm64/kvm/pkvm.c | 198 +++++++++++ arch/arm64/kvm/vgic/vgic-v3.c | 6 +- 19 files changed, 1010 insertions(+), 145 deletions(-) -- 2.47.1.613.gc27f4b7a9f-goog