From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id BAB704BD78A; Tue, 15 Sep 2026 16:02:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789488145; cv=none; b=tzu9tbsq+Ch5FNg7svzU9HL/Z4NB1LxWKs1Vj+yrO8ZZYxkKoX1Y0vC7nEStOgG7Mzmps8tddJ31N++OROXOdne/bB1ApEcx3hOzriveWf0vHgcn9nV9qVFwSxBiwZBTtmkXVmncOsVFwFXQQ7kf0LA0OWCLAJ7MjSAfdP2VeeM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789488145; c=relaxed/simple; bh=datF3OC3RosPiHglYYmm7bLuPO/48ROsNh7L6QxULV4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JlkVoCVW7jiZVFN4UQnVZ+Qaplwf1nDx0UD2cTb/eVvysj1USlcAYIl4w73lARt+s54+fCip0xTFAwoLNDl8hgvQyTAQfhLKR7cNpyxHve+7CjV+CHxCpqIzTm0FBePgWIHGkeKyUmzq8p+HCtsHxg6wrHhMu7nFdWgnim708ng= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=tZV7KI6s; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="tZV7KI6s" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9F5D51570; Tue, 15 Sep 2026 09:02:19 -0700 (PDT) Received: from ewhatever.cambridge.arm.com (ewhatever.cambridge.arm.com [10.2.197.99]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 875953F882; Tue, 15 Sep 2026 09:02:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1789488143; bh=datF3OC3RosPiHglYYmm7bLuPO/48ROsNh7L6QxULV4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tZV7KI6sh7Jy4XfvXKUfJv/d50esT6k+3jQPDVPk4pGq4fxrnbzOCAoG25fcgKnwt lfOf0hV5nRpsA0AwRE4xNMCrqQKhIYO6qulCXkRZjXuPu5gAv744S4rnEjPRn3UCRJ zjpPn72PlTRpSGC6c2w6fPgbSfvLPF3LgSgHPx4I= From: Suzuki K Poulose To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: maz@kernel.org, will@kernel.org, catalin.marinas@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, steven.price@arm.com, aneesh.kumar@kernel.org, oupton@kernel.org, gshan@redhat.com, joey.gouly@arm.com, tabba@google.com, yuzenghui@huawei.com, linux-coco@lists.linux.dev, gankulkarni@os.amperecomputing.com, sdonthineni@nvidia.com, alpergun@google.com, fj0570is@fujitsu.com, WeiLin.Chang@arm.com, lpieralisi@kernel.org, enju.kohei@fujitsu.com, Suzuki K Poulose Subject: [PATCH v18 10/23] KVM: arm64: Abstract out memory abort handling Date: Tue, 15 Sep 2026 17:01:28 +0100 Message-ID: <20260915160141.3543048-11-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260915160141.3543048-1-suzuki.poulose@arm.com> References: <20260915160141.3543048-1-suzuki.poulose@arm.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Move the memory abort handling under VM specific s2 operation. Signed-off-by: Suzuki K Poulose --- arch/arm64/include/asm/kvm_host.h | 2 ++ arch/arm64/kvm/mmu.c | 36 +++++++++++++++++++------------ 2 files changed, 24 insertions(+), 14 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index ad3b34ba0b805..7ce46d853c47e 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -156,6 +156,7 @@ struct kvm_vcpu_ops { }; struct kvm_gfn_range; +struct kvm_s2_fault_desc; struct kvm_vm_s2_ops { bool (*vm_age_gfn)(struct kvm *kvm, struct kvm_gfn_range *range); @@ -166,6 +167,7 @@ struct kvm_vm_s2_ops { void (*vm_stage2_unmap_range)(struct kvm_s2_mmu *mmu, phys_addr_t start, u64 size, bool may_block); + int (*vm_mem_abort)(const struct kvm_s2_fault_desc *s2fd); }; struct kvm_s2_mmu { diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 3d8b6e5b811ed..607c908c15c42 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1742,7 +1742,7 @@ struct kvm_s2_fault_vma_info { bool map_non_cacheable; }; -static int pkvm_mem_abort(const struct kvm_s2_fault_desc *s2fd) +static int protected_vm_mem_abort(const struct kvm_s2_fault_desc *s2fd) { unsigned int flags = FOLL_HWPOISON | FOLL_LONGTERM | FOLL_WRITE; struct kvm_vcpu *vcpu = s2fd->vcpu; @@ -2180,6 +2180,22 @@ static int user_mem_abort(const struct kvm_s2_fault_desc *s2fd) return kvm_s2_fault_map(s2fd, &s2vi, prot, memcache); } +static int kvm_vm_mem_abort(const struct kvm_s2_fault_desc *s2fd) +{ + int ret; + struct kvm_vcpu *vcpu = s2fd->vcpu; + + VM_WARN_ON_ONCE(kvm_vcpu_trap_is_permission_fault(vcpu) && + !kvm_is_write_fault(vcpu) && + !kvm_vcpu_trap_is_exec_fault(vcpu)); + + if (kvm_slot_has_gmem(s2fd->memslot)) + ret = gmem_abort(s2fd); + else + ret = user_mem_abort(s2fd); + return ret; +} + /* Resolve the access fault by making the page young again. */ static void handle_access_fault(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa) { @@ -2287,6 +2303,7 @@ int kvm_handle_guest_sea(struct kvm_vcpu *vcpu) int kvm_handle_guest_abort(struct kvm_vcpu *vcpu) { struct kvm_s2_trans nested_trans, *nested = NULL; + struct kvm *kvm = vcpu->kvm; unsigned long esr; phys_addr_t fault_ipa; /* The address we faulted on */ phys_addr_t ipa; /* Always the IPA in the L1 guest phys space */ @@ -2448,19 +2465,7 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu) .hva = hva, }; - if (kvm_vm_is_protected(vcpu->kvm)) { - ret = pkvm_mem_abort(&s2fd); - } else { - VM_WARN_ON_ONCE(kvm_vcpu_trap_is_permission_fault(vcpu) && - !write_fault && - !kvm_vcpu_trap_is_exec_fault(vcpu)); - - if (kvm_slot_has_gmem(memslot)) - ret = gmem_abort(&s2fd); - else - ret = user_mem_abort(&s2fd); - } - + ret = kvm->arch.vm_s2_ops->vm_mem_abort(&s2fd); if (ret == 0) ret = 1; out: @@ -2855,6 +2860,7 @@ static const struct kvm_vm_s2_ops protected_pkvm_vm_s2_ops = { * .vm_test_age_gfn * .vm_stage2_unmap_range */ + .vm_mem_abort = protected_vm_mem_abort, }; static const struct kvm_vm_s2_ops pkvm_vm_s2_ops = { @@ -2863,6 +2869,7 @@ static const struct kvm_vm_s2_ops pkvm_vm_s2_ops = { .vm_age_gfn = kvm_vm_age_gfn, .vm_test_age_gfn = kvm_vm_test_age_gfn, .vm_stage2_unmap_range = kvm_vm_stage2_unmap_range, + .vm_mem_abort = kvm_vm_mem_abort, }; static const struct kvm_vm_s2_ops kvm_default_vm_s2_ops = { @@ -2871,6 +2878,7 @@ static const struct kvm_vm_s2_ops kvm_default_vm_s2_ops = { .vm_age_gfn = kvm_vm_age_gfn, .vm_test_age_gfn = kvm_vm_test_age_gfn, .vm_stage2_unmap_range = kvm_vm_stage2_unmap_range, + .vm_mem_abort = kvm_vm_mem_abort, }; #define KVM_VM_S2_OPS(flavor, ops) \ -- 2.43.0