From patchwork Sat Apr 8 04:00:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Piggin X-Patchwork-Id: 13205594 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E63FC7619A for ; Sat, 8 Apr 2023 04:00:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230027AbjDHEAr (ORCPT ); Sat, 8 Apr 2023 00:00:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59990 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229483AbjDHEAo (ORCPT ); Sat, 8 Apr 2023 00:00:44 -0400 Received: from mail-pg1-x52b.google.com (mail-pg1-x52b.google.com [IPv6:2607:f8b0:4864:20::52b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 091E6E04F; Fri, 7 Apr 2023 21:00:43 -0700 (PDT) Received: by mail-pg1-x52b.google.com with SMTP id 41be03b00d2f7-5144a9c11c7so239398a12.2; Fri, 07 Apr 2023 21:00:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1680926442; x=1683518442; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=unH+fWcNwVMc4/m+QY2lOb5+1jkFSiaecoJbQLZexkQ=; b=TKnbOTcLocqQ2UusYfn6Us8cVF34l4WBWuqok/u51/uyL5BjN18WSeC6z+i/CeU489 DX3GrxfgC2wthiNYrfVLCqwJ44fKODT5/VkP25mnxbKMemJTlSr1OgBv/Kwn/23N3hmQ BB7qv2JJmIpVXP3+oMRT+dgWFPSYsICbUmTpXk6kj9zlR8HrBxrRvXxACj0XA+uBYLdA W9QCbhsap7oAHz9ntW+41a6K26o7tHylHPWRktn6gyTa+ate0PjjhR/pwlIea4cZ7z1N O8pO66rEMhlVah1kPHPmPPqWc3SJ9e/x5+MY81Fk5V9N1ZLtcP8kCevvGjrAmuNapC0V HaIg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680926442; x=1683518442; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=unH+fWcNwVMc4/m+QY2lOb5+1jkFSiaecoJbQLZexkQ=; b=QG2O99L0ibv8/Hz8IWqPFrQCEb4aLAzw/vbfIRCGBLRnmNPn/vQVzzFdt30eJOxAxy tiV5+xpOY+TCz3J5r24QvRBCV6SBDsAsSFBvCvFZz0BxhrkXSG86vBnJ/rRRC5jgYMe3 5zthqSREG5Akc6CgA9vgPKdGp62385xJ+E/s2SueSJYgbbZlhMfnLNjZKmNvbpoBL8P4 l7E6Jz9qEFdGBFweLzMWj51Lg3MDsdsx8nHNKpuWpxo5U5zmJiOvf81lI642NbZpYJif WlPFR4O9LHhmOLWTIpSuS+0yWVS9h10S9fHkgS+5Y+WpXayo/eq4a3Ezd8QOAOvrmlkG nJcw== X-Gm-Message-State: AAQBX9fm3O/WdLxXN8cadSu5rnh+40uIUkjM7WNPT8dNsF2RetOIGZx+ 5btKvzE2AeoYgZcEWqzDJZo= X-Google-Smtp-Source: AKy350b5GtmYLXAIhhFklYnJXBu5LgydaeEDK4ky0aUKG6RmVXG+EpiWnUIX86ANdpXUiuyBwu+HKA== X-Received: by 2002:aa7:96d3:0:b0:627:e577:4331 with SMTP id h19-20020aa796d3000000b00627e5774331mr4408583pfq.1.1680926442520; Fri, 07 Apr 2023 21:00:42 -0700 (PDT) Received: from wheely.local0.net ([203.59.189.25]) by smtp.gmail.com with ESMTPSA id o12-20020a056a001bcc00b006328ee1e56csm263872pfw.2.2023.04.07.21.00.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Apr 2023 21:00:41 -0700 (PDT) From: Nicholas Piggin To: Paolo Bonzini Cc: Nicholas Piggin , Shuah Khan , Michael Ellerman , Sean Christopherson , kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 2/4] KVM: selftests: Add aligned guest physical page allocator Date: Sat, 8 Apr 2023 14:00:18 +1000 Message-Id: <20230408040020.868929-3-npiggin@gmail.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230408040020.868929-1-npiggin@gmail.com> References: <20230408040020.868929-1-npiggin@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org powerpc will require this to allocate MMU tables in guest memory that are aligned and larger than the base page size. Signed-off-by: Nicholas Piggin --- .../selftests/kvm/include/kvm_util_base.h | 2 + tools/testing/selftests/kvm/lib/kvm_util.c | 44 ++++++++++++------- 2 files changed, 29 insertions(+), 17 deletions(-) diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h index 16425da16861..8a27bd4111ff 100644 --- a/tools/testing/selftests/kvm/include/kvm_util_base.h +++ b/tools/testing/selftests/kvm/include/kvm_util_base.h @@ -679,6 +679,8 @@ const char *exit_reason_str(unsigned int exit_reason); vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm, vm_paddr_t paddr_min, uint32_t memslot); +vm_paddr_t vm_phy_pages_alloc_align(struct kvm_vm *vm, size_t num, size_t align, + vm_paddr_t paddr_min, uint32_t memslot); vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num, vm_paddr_t paddr_min, uint32_t memslot); vm_paddr_t vm_alloc_page_table(struct kvm_vm *vm); diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 8ec20ac33de0..4f15bbbb8f5e 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -1898,6 +1898,7 @@ const char *exit_reason_str(unsigned int exit_reason) * Input Args: * vm - Virtual Machine * num - number of pages + * align - pages alignment * paddr_min - Physical address minimum * memslot - Memory region to allocate page from * @@ -1911,7 +1912,7 @@ const char *exit_reason_str(unsigned int exit_reason) * and their base address is returned. A TEST_ASSERT failure occurs if * not enough pages are available at or above paddr_min. */ -vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num, +vm_paddr_t vm_phy_pages_alloc_align(struct kvm_vm *vm, size_t num, size_t align, vm_paddr_t paddr_min, uint32_t memslot) { struct userspace_mem_region *region; @@ -1925,24 +1926,27 @@ vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num, paddr_min, vm->page_size); region = memslot2region(vm, memslot); - base = pg = paddr_min >> vm->page_shift; - - do { - for (; pg < base + num; ++pg) { - if (!sparsebit_is_set(region->unused_phy_pages, pg)) { - base = pg = sparsebit_next_set(region->unused_phy_pages, pg); - break; + base = paddr_min >> vm->page_shift; + +again: + base = (base + align - 1) & ~(align - 1); + for (pg = base; pg < base + num; ++pg) { + if (!sparsebit_is_set(region->unused_phy_pages, pg)) { + base = sparsebit_next_set(region->unused_phy_pages, pg); + if (!base) { + fprintf(stderr, "No guest physical pages " + "available, paddr_min: 0x%lx " + "page_size: 0x%x memslot: %u " + "num_pages: %lu align: %lu\n", + paddr_min, vm->page_size, memslot, + num, align); + fputs("---- vm dump ----\n", stderr); + vm_dump(stderr, vm, 2); + TEST_ASSERT(false, "false"); + abort(); } + goto again; } - } while (pg && pg != base + num); - - if (pg == 0) { - fprintf(stderr, "No guest physical page available, " - "paddr_min: 0x%lx page_size: 0x%x memslot: %u\n", - paddr_min, vm->page_size, memslot); - fputs("---- vm dump ----\n", stderr); - vm_dump(stderr, vm, 2); - abort(); } for (pg = base; pg < base + num; ++pg) @@ -1951,6 +1955,12 @@ vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num, return base * vm->page_size; } +vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num, + vm_paddr_t paddr_min, uint32_t memslot) +{ + return vm_phy_pages_alloc_align(vm, num, 1, paddr_min, memslot); +} + vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm, vm_paddr_t paddr_min, uint32_t memslot) {