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 D5E00CD3447 for ; Sun, 10 May 2026 14:54:32 +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: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:In-Reply-To:References:List-Owner; bh=uF8TF2GOVCerMhwVEoOYekz371q5hNoP6EZCVBlL4gM=; b=lflwHpywjF04XRmzM4dtqjouis Z8liyDsfXn/6jIXbLwsSNfIT7EOXRchuskAYqpwVxU11m7E6PjtDzCvxvbG4cpMCK+YaRDOwv9TxY 6DF1bYlW1JKgSfwSiDWlonc82axZ9ovwmtJlt9Zbpeab4eNUKkJbGdJ8CKQj+pzl/QyqYznf1HSCH 0lkZK1ZoQ0xnpWN8wQ4UzE++bSfqxEsp5zI6RbCvhTNLADzCB2EITMGHvtgw+FPyPO9tAU6ja4DZK a0ieUsELDEQDZNp1wg0/Qgoblm50oIw2F9YF6QyPRUdO897NI9Mzf+en78ueak/1cTzdbdQy1OnfE J1UWXr5Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wM5Y0-0000000Aytr-1Hwh; Sun, 10 May 2026 14:54:24 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wM5Xw-0000000Ayrq-1MSu for linux-arm-kernel@lists.infradead.org; Sun, 10 May 2026 14:54:21 +0000 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 E135F1D13; Sun, 10 May 2026 07:54:09 -0700 (PDT) Received: from workstation-e142269.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C80E23F836; Sun, 10 May 2026 07:54:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1778424855; bh=VYxBiY24h03tiLKCKU1MSqB/0xqzgQWJIyjoe5z/fSg=; h=From:To:Cc:Subject:Date:From; b=Rka61JTu1CsueQ86DnzZVem2PUA3yQTxo1jUnXzPgfs4eezOnsefjvySxeydpwHSq 4aTW8AOA+15xe3RLfifA8WoYpIwwMsr3fZvJXH2dnkQmECVFpQcIFoEza6ABOT2dx4 VTcO2j8J3EfBQR3uCZtLiZ5S0GL1oaYiUKeFHwgM= From: Wei-Lin Chang To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org Cc: Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , Wei-Lin Chang Subject: [PATCH v3 0/5] KVM: arm64: nv: Implement nested stage-2 reverse map Date: Sun, 10 May 2026 15:53:33 +0100 Message-ID: <20260510145338.322962-1-weilin.chang@arm.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260510_075420_552054_D9319755 X-CRM114-Status: UNSURE ( 8.35 ) X-CRM114-Notice: Please train this message. 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 Hi, This is v3 of optimizing the shadow s2 mmu unmapping during MMU notifiers. Two new preparatory patches are added, one reduces a hole in kvm_s2_mmu and another refactors the code a bit during s2 faults. Other changes are listed below. * Changes from v2 [1]: - Removed "polluted" teminology. - Use xa_{mk, to}_value() when storing and retriving values from maple trees. - Avoid using the 63rd bit in maple tree values so that xa_{mk, to}_value() does not lose us a bit. - Added reverse map removal during TLBI handling. - Other suggested refactorings. Thanks! [1]: https://lore.kernel.org/kvmarm/20260411125024.3735989-1-weilin.chang@arm.com/ Wei-Lin Chang (5): KVM: arm64: Use a variable for the canonical GPA in kvm_s2_fault_map() KVM: arm64: Move shadow_pt_debugfs_dentry to reduce holes in kvm_s2_mmu KVM: arm64: nv: Avoid full shadow s2 unmap KVM: arm64: nv: Remove reverse map entries during TLBI handling KVM: arm64: nv: Create nested IPA direct map to speed up reverse map removal arch/arm64/include/asm/kvm_host.h | 17 +- arch/arm64/include/asm/kvm_nested.h | 6 + arch/arm64/kvm/mmu.c | 43 +++-- arch/arm64/kvm/nested.c | 238 +++++++++++++++++++++++++++- arch/arm64/kvm/sys_regs.c | 3 + 5 files changed, 290 insertions(+), 17 deletions(-) -- 2.43.0