From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DFFC110ED65C for ; Fri, 27 Mar 2026 11:36:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=YQ8q6L0tpfXx+WSHTNQOJjZLUWGLZZcTwzKv1NLY2o0=; b=Rh05L5tZ0n4kExMH2ZB5UgStQ6 HDjJ6AxvNUW2EvuJCEaXe+Xb6yKMfzrVr7LNlqWRQhZ3IU9m0qKVcVrGlQ68VyXVMD4jqKr0GVUPw freIk3WV0DeGG+x7RnBCDvo06mIunI4kHLrJ31Um05poQyVGCd+k9zC45QTuFIcIwusm49VXiXHmQ zPJk86xwDcdlvxZCKNjeSgdNmSoR9oe4xZgzddBBwZN0oz38UT4aLCZC+sSViIDqxtG1HjLlWYdXl Or1J7eS8ZMhNR/7nLZmRgxH1PehMsL/te9C1zpRYb1G5/jjd4RkPDb2xepgmcd8gFtSDhNdADwGyG Sef2kfaw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w65Ug-00000007FOF-45Br; Fri, 27 Mar 2026 11:36:50 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w65UL-00000007F5q-1SLs for linux-arm-kernel@lists.infradead.org; Fri, 27 Mar 2026 11:36:29 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id B5C906184E; Fri, 27 Mar 2026 11:36:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 81CB3C2BCB8; Fri, 27 Mar 2026 11:36:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774611388; bh=0glThNb9QbjDwvXTy2EB6goDvXJ2brPHca8WtXY6vtE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EouL09t5GpnG6Zp4wSj9iJaPyh7KVPB0O0ptJGxPhc8EZgYAXALIDfW289wvscpFq giwQKCCZZGljIY7PO2zF7D9DKtu82EErbfJIv7bqS+W953ntHOSaWZKv2ruRp3UWXq 3Yf3xlEm0ffZMF2OBLYOboT/KpK4zQnBTbVboJBbqlRxIQbHpECaNdeUaOIxOiUnww 7oP3qTU1e+rWYau9JTDj+l5ij/hh1qNL8h1iDyZ8I14WX08Jnhuz4Tqob1OvpfTpyP LPTQ3J1WBNrNluf0Dc9gXBMoaOOz7Apx4DYT0cw/hXzRZjp11hlou4NSE4PAfA37C4 pyfsa0eOP4ZQg== 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 1w65UI-00000006K4a-2uss; Fri, 27 Mar 2026 11:36:26 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org Cc: Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Fuad Tabba , Will Deacon , Quentin Perret Subject: [PATCH v2 19/30] KVM: arm64: Kill write_fault from kvm_s2_fault Date: Fri, 27 Mar 2026 11:36:07 +0000 Message-ID: <20260327113618.4051534-20-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260327113618.4051534-1-maz@kernel.org> References: <20260327113618.4051534-1-maz@kernel.org> 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, kvm@vger.kernel.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 X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org We already have kvm_is_write_fault() as a predicate indicating a S2 fault on a write, and we're better off just using that instead of duplicating the state. Tested-by: Fuad Tabba Reviewed-by: Fuad Tabba Reviewed-by: Suzuki K Poulose Signed-off-by: Marc Zyngier --- arch/arm64/kvm/mmu.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 981c04a74ab7a..7dab0c3faa5bf 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1711,7 +1711,6 @@ static short kvm_s2_resolve_vma_size(const struct kvm_s2_fault_desc *s2fd, } struct kvm_s2_fault { - bool write_fault; bool exec_fault; bool writable; bool topup_memcache; @@ -1799,7 +1798,7 @@ static int kvm_s2_fault_pin_pfn(const struct kvm_s2_fault_desc *s2fd, return ret; fault->pfn = __kvm_faultin_pfn(s2fd->memslot, get_canonical_gfn(s2fd, fault), - fault->write_fault ? FOLL_WRITE : 0, + kvm_is_write_fault(s2fd->vcpu) ? FOLL_WRITE : 0, &fault->writable, &fault->page); if (unlikely(is_error_noslot_pfn(fault->pfn))) { if (fault->pfn == KVM_PFN_ERR_HWPOISON) { @@ -1850,7 +1849,7 @@ static int kvm_s2_fault_compute_prot(const struct kvm_s2_fault_desc *s2fd, */ fault->s2_force_noncacheable = true; } - } else if (fault->logging_active && !fault->write_fault) { + } else if (fault->logging_active && !kvm_is_write_fault(s2fd->vcpu)) { /* * Only actually map the page as writable if this was a write * fault. @@ -1980,21 +1979,17 @@ static int kvm_s2_fault_map(const struct kvm_s2_fault_desc *s2fd, static int user_mem_abort(const struct kvm_s2_fault_desc *s2fd) { bool perm_fault = kvm_vcpu_trap_is_permission_fault(s2fd->vcpu); - bool write_fault = kvm_is_write_fault(s2fd->vcpu); bool logging_active = memslot_is_logging(s2fd->memslot); struct kvm_s2_fault fault = { .logging_active = logging_active, .force_pte = logging_active, .prot = KVM_PGTABLE_PROT_R, - .write_fault = write_fault, .exec_fault = kvm_vcpu_trap_is_exec_fault(s2fd->vcpu), - .topup_memcache = !perm_fault || (logging_active && write_fault), + .topup_memcache = !perm_fault || (logging_active && kvm_is_write_fault(s2fd->vcpu)), }; void *memcache; int ret; - VM_WARN_ON_ONCE(fault.write_fault && fault.exec_fault); - /* * Permission faults just need to update the existing leaf entry, * and so normally don't require allocations from the memcache. The -- 2.47.3