From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8CC7F33BBBA for ; Mon, 16 Mar 2026 17:55:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773683704; cv=none; b=qtXuCRtz7xKG7+7cH/mwSVX+IqSoTg05rs7xPKZOFcmYw90C8C5W8WMUlMvWik4K/ymrh9TIc4PpAfFQFJpEi1yGR9S+JQkCG2bMKWghQvNXSj2eiiWBnQUYBNsnwiEo0btkoZ9O4ZqTIKBDWLPgtepzSEEEHvhUJuCOgWSo8bo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773683704; c=relaxed/simple; bh=Yhcoi82LDcFIJ95YljMG/cgOkIvsAJkNqfTlNH0oGkU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pP5X1U9/QJmxxQjs6tNZTLTlf0jHMo7jpyKVOvEOjYsFtCN3n4A0Gx4lZ5Ne7+Df+gj2hY4gpK5CePTh9FCJghCVFQIqnVnFp0wsW4DVsXQvNnNiGED9qRkV6P9KXjaehRRuaRJI/v2jDujXe7OIyzdsJMvEPoqhooSCEAJmv4A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qAR03LhD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="qAR03LhD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6A978C19425; Mon, 16 Mar 2026 17:55:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773683704; bh=Yhcoi82LDcFIJ95YljMG/cgOkIvsAJkNqfTlNH0oGkU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qAR03LhDFV3kpzjK+ixo1mZWgNxg4KNv7qXd3SQQCVq+6hMiyigYNfTJRJiu71S8t oSQ43y6jAyIh4P0WvOflWSJ2N9P6LZdWrJCSlgsS0HEpnym5ucZIS3kk/1Y7Fn6eqq 4sbc0FC4Tag/iSCFve2hB73DZYV93nHFK+/U30mHEDnEtM7N3zzVl6zNKhIxpEOzFJ I7qHypPMDSJQ/S3+3MDc7pvKNh6Tf3Z7GXqLk/i2KGJup4RGBTJqbXlvteqYAWeQnz Ml3+wW10eldd8NjzXb7YmqFPW3Zz/P5GSUJDmoT3/L/dLecJJ2jihUh3rCAC7IbT6y oBKHFPE7H0aSg== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1w2C9e-00000002XDx-31wW; Mon, 16 Mar 2026 17:55:02 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Fuad Tabba , Will Deacon , Quentin Perret Subject: [PATCH 15/17] KVM: arm64: Directly expose mapping prot and kill kvm_s2_fault Date: Mon, 16 Mar 2026 17:54:48 +0000 Message-ID: <20260316175451.1866175-16-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260316175451.1866175-1-maz@kernel.org> References: <20260316175451.1866175-1-maz@kernel.org> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, joey.gouly@arm.com, suzuki.poulose@arm.com, oupton@kernel.org, yuzenghui@huawei.com, tabba@google.com, will@kernel.org, qperret@google.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false The 'prot' field is the only one left in kvm_s2_fault. Expose it directly to the functions needing it, and get rid of kvm_s2_fault. It has served us well during this refactoring, but it is now no longer needed. Signed-off-by: Marc Zyngier --- arch/arm64/kvm/mmu.c | 45 +++++++++++++++++++++----------------------- 1 file changed, 21 insertions(+), 24 deletions(-) diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 97cb3585eba03..9b5df70807875 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1729,10 +1729,6 @@ static short kvm_s2_resolve_vma_size(const struct kvm_s2_fault_desc *s2fd, return vma_shift; } -struct kvm_s2_fault { - enum kvm_pgtable_prot prot; -}; - static bool kvm_s2_fault_is_perm(const struct kvm_s2_fault_desc *s2fd) { return kvm_vcpu_trap_is_permission_fault(s2fd->vcpu); @@ -1856,8 +1852,8 @@ static int kvm_s2_fault_pin_pfn(const struct kvm_s2_fault_desc *s2fd, } static int kvm_s2_fault_compute_prot(const struct kvm_s2_fault_desc *s2fd, - struct kvm_s2_fault *fault, - const struct kvm_s2_fault_vma_info *s2vi) + const struct kvm_s2_fault_vma_info *s2vi, + enum kvm_pgtable_prot *prot) { struct kvm *kvm = s2fd->vcpu->kvm; bool writable = s2vi->map_writable; @@ -1885,23 +1881,25 @@ static int kvm_s2_fault_compute_prot(const struct kvm_s2_fault_desc *s2fd, return 1; } + *prot = KVM_PGTABLE_PROT_R; + if (s2fd->nested) - adjust_nested_fault_perms(s2fd->nested, &fault->prot, &writable); + adjust_nested_fault_perms(s2fd->nested, prot, &writable); if (writable) - fault->prot |= KVM_PGTABLE_PROT_W; + *prot |= KVM_PGTABLE_PROT_W; if (kvm_vcpu_trap_is_exec_fault(s2fd->vcpu)) - fault->prot |= KVM_PGTABLE_PROT_X; + *prot |= KVM_PGTABLE_PROT_X; if (s2vi->map_non_cacheable) - fault->prot |= (s2vi->vm_flags & VM_ALLOW_ANY_UNCACHED) ? - KVM_PGTABLE_PROT_NORMAL_NC : KVM_PGTABLE_PROT_DEVICE; + *prot |= (s2vi->vm_flags & VM_ALLOW_ANY_UNCACHED) ? + KVM_PGTABLE_PROT_NORMAL_NC : KVM_PGTABLE_PROT_DEVICE; else if (cpus_have_final_cap(ARM64_HAS_CACHE_DIC)) - fault->prot |= KVM_PGTABLE_PROT_X; + *prot |= KVM_PGTABLE_PROT_X; if (s2fd->nested) - adjust_nested_exec_perms(kvm, s2fd->nested, &fault->prot); + adjust_nested_exec_perms(kvm, s2fd->nested, prot); if (!kvm_s2_fault_is_perm(s2fd) && !s2vi->map_non_cacheable && kvm_has_mte(kvm)) { /* Check the VMM hasn't introduced a new disallowed VMA */ @@ -1913,11 +1911,12 @@ static int kvm_s2_fault_compute_prot(const struct kvm_s2_fault_desc *s2fd, } static int kvm_s2_fault_map(const struct kvm_s2_fault_desc *s2fd, - struct kvm_s2_fault *fault, - const struct kvm_s2_fault_vma_info *s2vi, void *memcache) + const struct kvm_s2_fault_vma_info *s2vi, + enum kvm_pgtable_prot prot, + void *memcache) { enum kvm_pgtable_walk_flags flags = KVM_PGTABLE_WALK_SHARED; - bool writable = fault->prot & KVM_PGTABLE_PROT_W; + bool writable = prot & KVM_PGTABLE_PROT_W; struct kvm *kvm = s2fd->vcpu->kvm; struct kvm_pgtable *pgt; long perm_fault_granule; @@ -1970,12 +1969,12 @@ static int kvm_s2_fault_map(const struct kvm_s2_fault_desc *s2fd, * Drop the SW bits in favour of those stored in the * PTE, which will be preserved. */ - fault->prot &= ~KVM_NV_GUEST_MAP_SZ; + prot &= ~KVM_NV_GUEST_MAP_SZ; ret = KVM_PGT_FN(kvm_pgtable_stage2_relax_perms)(pgt, gfn_to_gpa(gfn), - fault->prot, flags); + prot, flags); } else { ret = KVM_PGT_FN(kvm_pgtable_stage2_map)(pgt, gfn_to_gpa(gfn), mapping_size, - __pfn_to_phys(pfn), fault->prot, + __pfn_to_phys(pfn), prot, memcache, flags); } @@ -1999,9 +1998,7 @@ static int user_mem_abort(const struct kvm_s2_fault_desc *s2fd) { bool perm_fault = kvm_vcpu_trap_is_permission_fault(s2fd->vcpu); struct kvm_s2_fault_vma_info s2vi = {}; - struct kvm_s2_fault fault = { - .prot = KVM_PGTABLE_PROT_R, - }; + enum kvm_pgtable_prot prot; void *memcache; int ret; @@ -2026,13 +2023,13 @@ static int user_mem_abort(const struct kvm_s2_fault_desc *s2fd) if (ret != 1) return ret; - ret = kvm_s2_fault_compute_prot(s2fd, &fault, &s2vi); + ret = kvm_s2_fault_compute_prot(s2fd, &s2vi, &prot); if (ret) { kvm_release_page_unused(s2vi.page); return ret; } - return kvm_s2_fault_map(s2fd, &fault, &s2vi, memcache); + return kvm_s2_fault_map(s2fd, &s2vi, prot, memcache); } /* Resolve the access fault by making the page young again. */ -- 2.47.3