From nobody Sun Nov 2 12:04:15 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1509106949450647.0292740259166; Fri, 27 Oct 2017 05:22:29 -0700 (PDT) Received: from localhost ([::1]:57111 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e83eR-0004NG-9F for importer@patchew.org; Fri, 27 Oct 2017 08:22:15 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60761) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e83cX-0003Bk-59 for qemu-devel@nongnu.org; Fri, 27 Oct 2017 08:20:18 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e83cS-0006gx-3Y for qemu-devel@nongnu.org; Fri, 27 Oct 2017 08:20:17 -0400 Received: from chuckie.co.uk ([82.165.15.123]:33174 helo=s16892447.onlinehome-server.info) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1e83cR-0006Yf-Sh for qemu-devel@nongnu.org; Fri, 27 Oct 2017 08:20:12 -0400 Received: from [62.168.35.106] (helo=kentang.lan) by s16892447.onlinehome-server.info with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1e83cP-0005vL-Ja; Fri, 27 Oct 2017 13:20:10 +0100 From: Mark Cave-Ayland To: qemu-devel@nongnu.org, atar4qemu@gmail.com Date: Fri, 27 Oct 2017 13:19:46 +0100 Message-Id: <1509106789-8626-2-git-send-email-mark.cave-ayland@ilande.co.uk> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1509106789-8626-1-git-send-email-mark.cave-ayland@ilande.co.uk> References: <1509106789-8626-1-git-send-email-mark.cave-ayland@ilande.co.uk> X-SA-Exim-Connect-IP: 62.168.35.106 X-SA-Exim-Mail-From: mark.cave-ayland@ilande.co.uk X-SA-Exim-Version: 4.2.1 (built Sun, 08 Jan 2012 02:45:44 +0000) X-SA-Exim-Scanned: Yes (on s16892447.onlinehome-server.info) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 82.165.15.123 Subject: [Qemu-devel] [PATCHv2 1/4] sun4m: implement IOMMU translation using IOMMU memory region X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Signed-off-by: Mark Cave-Ayland --- hw/dma/sun4m_iommu.c | 62 ++++++++++++++++++++++++++++++++++++++++++= ++++ include/hw/sparc/sun4m.h | 5 ++++ 2 files changed, 67 insertions(+) diff --git a/hw/dma/sun4m_iommu.c b/hw/dma/sun4m_iommu.c index 840064b..ce21a22 100644 --- a/hw/dma/sun4m_iommu.c +++ b/hw/dma/sun4m_iommu.c @@ -278,6 +278,49 @@ static void iommu_bad_addr(IOMMUState *s, hwaddr addr, qemu_irq_raise(s->irq); } =20 +/* Called from RCU critical section */ +static IOMMUTLBEntry sun4m_translate_iommu(IOMMUMemoryRegion *iommu, + hwaddr addr, + IOMMUAccessFlags flags) +{ + IOMMUState *is =3D container_of(iommu, IOMMUState, iommu); + hwaddr page, pa; + int is_write =3D (flags & IOMMU_WO) ? 1 : 0; + uint32_t pte; + IOMMUTLBEntry ret =3D { + .target_as =3D &address_space_memory, + .iova =3D 0, + .translated_addr =3D 0, + .addr_mask =3D ~(hwaddr)0, + .perm =3D IOMMU_NONE, + }; + + page =3D addr & IOMMU_PAGE_MASK; + pte =3D iommu_page_get_flags(is, page); + if (!(pte & IOPTE_VALID)) { + iommu_bad_addr(is, page, is_write); + return ret; + } + + pa =3D iommu_translate_pa(addr, pte); + if (is_write && !(pte & IOPTE_WRITE)) { + iommu_bad_addr(is, page, is_write); + return ret; + } + + if (pte & IOPTE_WRITE) { + ret.perm =3D IOMMU_RW; + } else { + ret.perm =3D IOMMU_RO; + } + + ret.iova =3D page; + ret.translated_addr =3D pa; + ret.addr_mask =3D ~IOMMU_PAGE_MASK; + + return ret; +} + void sparc_iommu_memory_rw(void *opaque, hwaddr addr, uint8_t *buf, int len, int is_write) { @@ -340,6 +383,11 @@ static void iommu_init(Object *obj) IOMMUState *s =3D SUN4M_IOMMU(obj); SysBusDevice *dev =3D SYS_BUS_DEVICE(obj); =20 + memory_region_init_iommu(&s->iommu, sizeof(s->iommu), + TYPE_SUN4M_IOMMU_MEMORY_REGION, OBJECT(dev), + "iommu-sun4m", UINT64_MAX); + address_space_init(&s->iommu_as, MEMORY_REGION(&s->iommu), "iommu-as"); + sysbus_init_irq(dev, &s->irq); =20 memory_region_init_io(&s->iomem, obj, &iommu_mem_ops, s, "iommu", @@ -369,9 +417,23 @@ static const TypeInfo iommu_info =3D { .class_init =3D iommu_class_init, }; =20 +static void sun4m_iommu_memory_region_class_init(ObjectClass *klass, void = *data) +{ + IOMMUMemoryRegionClass *imrc =3D IOMMU_MEMORY_REGION_CLASS(klass); + + imrc->translate =3D sun4m_translate_iommu; +} + +static const TypeInfo sun4m_iommu_memory_region_info =3D { + .parent =3D TYPE_IOMMU_MEMORY_REGION, + .name =3D TYPE_SUN4M_IOMMU_MEMORY_REGION, + .class_init =3D sun4m_iommu_memory_region_class_init, +}; + static void iommu_register_types(void) { type_register_static(&iommu_info); + type_register_static(&sun4m_iommu_memory_region_info); } =20 type_init(iommu_register_types) diff --git a/include/hw/sparc/sun4m.h b/include/hw/sparc/sun4m.h index 1f1cf91..6e21e10 100644 --- a/include/hw/sparc/sun4m.h +++ b/include/hw/sparc/sun4m.h @@ -12,11 +12,16 @@ #define TYPE_SUN4M_IOMMU "iommu" #define SUN4M_IOMMU(obj) OBJECT_CHECK(IOMMUState, (obj), TYPE_SUN4M_IOMMU) =20 +#define TYPE_SUN4M_IOMMU_MEMORY_REGION "sun4m-iommu-memory-region" + #define IOMMU_NREGS (4 * 4096 / 4) =20 typedef struct IOMMUState { SysBusDevice parent_obj; =20 + AddressSpace iommu_as; + IOMMUMemoryRegion iommu; + MemoryRegion iomem; uint32_t regs[IOMMU_NREGS]; hwaddr iostart; --=20 1.7.10.4