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 3E702CD4851 for ; Sat, 16 May 2026 18:31:08 +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=Vc0G3fVTDA0KoBlVty6FVQPgJehqicMqVBRcne/BwdM=; b=KrbxV2XyGysGG337jMJHdrxlpi zKt+DukgTMvIK2ks2c9J3z/2Y78/AEFp2L2zMARWLzgS7y0AaUROyzWXHQj3kMj45rNqBQlX6JMpP wzayPEZoGdvBDZTRBz4+stRPq5LFkBIfABMN2t8xzNTstJhXNwME9CWCzG9Jrls/qmuIdIuPTIE11 fNGBQxPhxt9F8pKs+6O66LB0jZqGkKJc9WhteTTEy/LjvdOgTSavmULHHE+R869KVAlz67zQvpjT5 NKizGLUU2iOcdoOfANzJISw5DdhDxnQCeqn4xfEnPQSIr9o5kZ8VmqvtQ8G8N3DPnInZym1sAm6C7 w8W0LfSg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wOJms-0000000BCI0-3ipC; Sat, 16 May 2026 18:30:58 +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 1wOJmn-0000000BCG9-3J44 for linux-arm-kernel@lists.infradead.org; Sat, 16 May 2026 18:30:55 +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 6E9861BF3; Sat, 16 May 2026 11:30:43 -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 023AD3F85F; Sat, 16 May 2026 11:30:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1778956248; bh=NPq7c3O7m9YoMQfFgefKlCXS40W630c66ivNjwX7VnY=; h=From:To:Cc:Subject:Date:From; b=X3AVoYMic76EhjPA5QnkayYsO/uqgN8aSmHiHRkVLmdd4+gKne8/4SxtqHitV5VIx dR79teEEA0ZcD5I9q2lArcEV20ly23EVs3HPgOHZ+4qtsomrkBjl7lvv3Q00yg1i4R 60pEIp5GvT2zSy+ff9ZHmAN7EC8SaBkbkzOjSYNo= From: Wei-Lin Chang To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev Cc: Paolo Bonzini , Shuah Khan , Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , Itaru Kitayama , Wei-Lin Chang Subject: [PATCH v3 0/9] KVM: arm64: selftests: Basic nested guest support Date: Sat, 16 May 2026 19:29:54 +0100 Message-ID: <20260516183003.799058-1-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-20260516_113053_957234_220E6724 X-CRM114-Status: GOOD ( 10.12 ) 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 adding basic support for running nested guests (L2) in kselftest. This time a framework for enabling stage-2 in the guest is added, including the s2_mmu struct, s2 translation control setup, and a stage-2 page table generator. Similar to L2 vCPU management, all stage-2 work is done in the guest instead of userspace. An additional shadow_stage2 test is added which leverages the framework to run L2 with stage-2 enabled. * Changes from v2 [1]: - Update vm_paddr_t to gpa_t, vm_vaddr_t to gva_t. - Added framework for enabling stage-2 in the guest. - Added shadow_stage2 test. Thanks! [1]: https://lore.kernel.org/kvmarm/20260412142216.3806482-1-weilin.chang@arm.com/ Wei-Lin Chang (9): KVM: arm64: selftests: Add GPR save/restore functions for NV KVM: arm64: selftests: Add helpers for guest hypervisors KVM: arm64: selftests: Add hello_nested basic NV selftest KVM: arm64: selftests: Enhance hello_nested test KVM: arm64: selftests: Add shadow_stage2 test KVM: arm64: selftests: shadow_stage2: Allocate L2 stack from dedicated pool KVM: arm64: selftests: shadow_stage2: Check supported stage-2 granule size KVM: arm64: selftests: Add infrastructure for using stage-2 in guest KVM: arm64: selftests: shadow_stage2: Turn on stage-2 translation for the nested guest tools/testing/selftests/kvm/Makefile.kvm | 5 + .../selftests/kvm/arm64/hello_nested.c | 134 +++++++++ .../selftests/kvm/arm64/shadow_stage2.c | 165 +++++++++++ .../selftests/kvm/include/arm64/nested.h | 85 ++++++ tools/testing/selftests/kvm/lib/arm64/entry.S | 137 +++++++++ .../selftests/kvm/lib/arm64/hyp-entry.S | 77 +++++ .../testing/selftests/kvm/lib/arm64/nested.c | 264 ++++++++++++++++++ 7 files changed, 867 insertions(+) create mode 100644 tools/testing/selftests/kvm/arm64/hello_nested.c create mode 100644 tools/testing/selftests/kvm/arm64/shadow_stage2.c create mode 100644 tools/testing/selftests/kvm/include/arm64/nested.h create mode 100644 tools/testing/selftests/kvm/lib/arm64/entry.S create mode 100644 tools/testing/selftests/kvm/lib/arm64/hyp-entry.S create mode 100644 tools/testing/selftests/kvm/lib/arm64/nested.c -- 2.43.0