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 C1457C433EF for ; Thu, 16 Dec 2021 13:04:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=vFY2aSbp+5X911rgqsSRSL0a8wxVk3VOFPUht31pyQQ=; b=29ZgqezJsMPRLq plgavmuH3Qix80WHAvpyHzcwm6qmAPf8kLkEhbKZNS8x3SrAbX94PoVilxM6T9C4thjIwSt7vt7kk aZXZlSsXOqMKGiFXWz9gvQhxsRzUMF1I8d2BSwfvKZyOWKaeFZSrx8yqwN4EjenEkEXne6hMEF8Rk kGYodwf/l+H/LYt6mPBJ13Jzol5PkrTmMTjTVlyXOXdKEScKqj5LGfRV2c7w9GNig9pIstOY1FS6n nwL/hS9PFwp05gD+IqVnlN6c26a8ZmXHGLJL3iGPbjdHpr8biO1cTOPxR17oqRkt632cl0MWpEqim krqscOdO687yPdHjQYRQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mxqPO-005bzK-1O; Thu, 16 Dec 2021 13:02:54 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mxpvB-005Rqe-OR for linux-arm-kernel@lists.infradead.org; Thu, 16 Dec 2021 12:31:43 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 211A561DCB; Thu, 16 Dec 2021 12:31:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 82E44C36AE4; Thu, 16 Dec 2021 12:31:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1639657900; bh=kBOiO5yeoWnB+tkXGY+eu1N5qdNCnGtoe3lJ3h1k9ww=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=I5h2h/+UnYA/I3ORTb4wfkIw42D/HcvLRVMjTf1tKNA1XhWVY9YQEJtPSe03wZieo jG3WEpxBRwf5sBov7HxERfUJt6R+ruRrZQbrRHmqW/IThySX99sppmn5JEmabe/Q2G OjxvnYkMBlbPal33RpMUzaPpefC3Q3ijDh2qof4Gh5u1Jo07nWtDxHSJ3zMeFqWMPq PwwtA2SGKTQW04D7IJYqOCUXZ2RGIOaVcFkEjwdNesaJdxHDLV9jcSPrcJltborrAH d/4OzbHCMPIksSkpnyTpRAXlUi+/1wKe1Vth+v+Oo4GnpGYiWMPDcNCYZjDY0fZiv0 rpfac1Z7CE9eA== Received: from cfbb000407.r.cam.camfibre.uk ([185.219.108.64] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1mxpv8-00CWIB-Kx; Thu, 16 Dec 2021 12:31:38 +0000 From: Marc Zyngier To: Paolo Bonzini , Andrew Jones Cc: James Morse , Suzuki K Poulose , Alexandru Elisei , kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel-team@android.com Subject: [PATCH 3/5] KVM: selftests: arm64: Introduce a variable default IPA size Date: Thu, 16 Dec 2021 12:31:33 +0000 Message-Id: <20211216123135.754114-4-maz@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211216123135.754114-1-maz@kernel.org> References: <20211216123135.754114-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: pbonzini@redhat.com, drjones@redhat.com, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.com, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211216_043141_909994_FF2CE67C X-CRM114-Status: GOOD ( 16.91 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Contrary to popular belief, there is no such thing as a default IPA size on arm64. Anything goes, and implementations are the usual Wild West. The selftest infrastructure default to 40bit IPA, which obviously doesn't work for some systems out there. Turn VM_MODE_DEFAULT from a constant into a variable, and let guest_modes_append_default() populate it, depending on what the HW can do. In order to preserve the current behaviour, we still pick 40bits IPA as the default if it is available, and the largest supported IPA space otherwise. Signed-off-by: Marc Zyngier --- .../testing/selftests/kvm/include/kvm_util.h | 4 ++- tools/testing/selftests/kvm/lib/guest_modes.c | 28 +++++++++++++++++-- 2 files changed, 29 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index c74241ddf8b1..d2ba830a1faf 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -53,7 +53,9 @@ enum vm_guest_mode { #if defined(__aarch64__) -#define VM_MODE_DEFAULT VM_MODE_P40V48_4K +extern enum vm_guest_mode vm_mode_default; + +#define VM_MODE_DEFAULT vm_mode_default #define MIN_PAGE_SHIFT 12U #define ptes_per_page(page_size) ((page_size) / 8) diff --git a/tools/testing/selftests/kvm/lib/guest_modes.c b/tools/testing/selftests/kvm/lib/guest_modes.c index c330f414ef96..fadc99bac69c 100644 --- a/tools/testing/selftests/kvm/lib/guest_modes.c +++ b/tools/testing/selftests/kvm/lib/guest_modes.c @@ -4,22 +4,46 @@ */ #include "guest_modes.h" +#ifdef __aarch64__ +enum vm_guest_mode vm_mode_default; +#endif + struct guest_mode guest_modes[NUM_VM_MODES]; void guest_modes_append_default(void) { +#ifndef __aarch64__ guest_mode_append(VM_MODE_DEFAULT, true, true); - +#endif #ifdef __aarch64__ - guest_mode_append(VM_MODE_P40V48_64K, true, true); { unsigned int limit = kvm_check_cap(KVM_CAP_ARM_VM_IPA_SIZE); + int i; + + vm_mode_default = NUM_VM_MODES; + if (limit >= 52) guest_mode_append(VM_MODE_P52V48_64K, true, true); if (limit >= 48) { guest_mode_append(VM_MODE_P48V48_4K, true, true); guest_mode_append(VM_MODE_P48V48_64K, true, true); } + if (limit >= 40) { + guest_mode_append(VM_MODE_P40V48_4K, true, true); + guest_mode_append(VM_MODE_P40V48_64K, true, true); + vm_mode_default = VM_MODE_P40V48_4K; + } + + /* Pick the largest supported IPA size */ + for (i = 0; + vm_mode_default == NUM_VM_MODES && i < NUM_VM_MODES; + i++) { + if (guest_modes[i].supported) + vm_mode_default = i; + } + + TEST_ASSERT(vm_mode_default != NUM_VM_MODES, + "No supported mode!"); } #endif #ifdef __s390x__ -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel