From patchwork Wed Aug 9 20:34:13 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "lan,Tianyu" X-Patchwork-Id: 9892659 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2C7D960236 for ; Thu, 10 Aug 2017 02:44:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D489F283C7 for ; Thu, 10 Aug 2017 02:44:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C931F28497; Thu, 10 Aug 2017 02:44:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=2.0 tests=BAYES_00, DATE_IN_PAST_06_12, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6A526283C7 for ; Thu, 10 Aug 2017 02:44:09 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dfdPo-0001Hw-Ab; Thu, 10 Aug 2017 02:41:40 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dfdPn-0001Gu-2E for xen-devel@lists.xen.org; Thu, 10 Aug 2017 02:41:39 +0000 Received: from [85.158.143.35] by server-4.bemta-6.messagelabs.com id 11/60-02962-2E7CB895; Thu, 10 Aug 2017 02:41:38 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrFLMWRWlGSWpSXmKPExsXS1tYhr/vweHe kwcwWU4slHxezODB6HN39mymAMYo1My8pvyKBNeP/ij7WgguKFQ2dkg2MpyW7GDk5hAQqJc7d /c0OYksI8EocWTaDFcL2lzh3dBpTFyMXUE0Ho0T/z89sIAk2AXWJE4snMoLYIgLSEtc+X2YEK WIWuMoocXrbfGaQhLCArcTtBe9ZQGwWAVWJ1/O/gcV5BVwlps7/ALVNQWLKw/dgcU6Q+JatTB AXuUisWz6NcQIj7wJGhlWMGsWpRWWpRbpG5npJRZnpGSW5iZk5uoYGZnq5qcXFiempOYlJxXr J+bmbGIHhwAAEOxgXrw08xCjJwaQkytvR0B0pxJeUn1KZkVicEV9UmpNafIhRhoNDSYK3+xhQ TrAoNT21Ii0zBxiYMGkJDh4lEd4ykDRvcUFibnFmOkTqFKMux6sJ/78xCbHk5eelSonzLgEpE gApyijNgxsBi5JLjLJSwryMQEcJ8RSkFuVmlqDKv2IU52BUEuatAJnCk5lXArfpFdARTEBHRP h2ghxRkoiQkmpgnLPw64Ypd38H3562QmqncsaLSV5Cfs7ZDjuOpa4r8fqW+Jw/4N35u0vu3w3 fm9PzJ1wou1Ft8sxDkjEKzZeV5O/URjDJGDr56MbPursvd3rtYek2BmNLOTaOJKYD89YkSutz pYnLrlBdv3DtxPaJSs7MN1ISmN2EHwYf2DZP4lbOl7mL/72sUGIpzkg01GIuKk4EAHBQgbyNA gAA X-Env-Sender: tianyu.lan@intel.com X-Msg-Ref: server-15.tower-21.messagelabs.com!1502332894!77089490!1 X-Originating-IP: [134.134.136.31] X-SpamReason: No, hits=0.8 required=7.0 tests=DATE_IN_PAST_06_12 X-StarScan-Received: X-StarScan-Version: 9.4.45; banners=-,-,- X-VirusChecked: Checked Received: (qmail 11460 invoked from network); 10 Aug 2017 02:41:37 -0000 Received: from mga06.intel.com (HELO mga06.intel.com) (134.134.136.31) by server-15.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 10 Aug 2017 02:41:37 -0000 Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga104.jf.intel.com with ESMTP; 09 Aug 2017 19:41:34 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.41,349,1498546800"; d="scan'208";a="138480994" Received: from sky-ws.sh.intel.com (HELO localhost) ([10.239.48.141]) by fmsmga006.fm.intel.com with ESMTP; 09 Aug 2017 19:41:32 -0700 From: Lan Tianyu To: xen-devel@lists.xen.org Date: Wed, 9 Aug 2017 16:34:13 -0400 Message-Id: <1502310866-10450-13-git-send-email-tianyu.lan@intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1502310866-10450-1-git-send-email-tianyu.lan@intel.com> References: <1502310866-10450-1-git-send-email-tianyu.lan@intel.com> Cc: Lan Tianyu , kevin.tian@intel.com, wei.liu2@citrix.com, andrew.cooper3@citrix.com, ian.jackson@eu.citrix.com, julien.grall@arm.com, jbeulich@suse.com, Chao Gao Subject: [Xen-devel] [PATCH V2 12/25] x86/vvtd: Add MMIO handler for VVTD X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Chao Gao This patch adds VVTD MMIO handler to deal with MMIO access. Signed-off-by: Chao Gao Signed-off-by: Lan Tianyu --- xen/drivers/passthrough/vtd/vvtd.c | 114 +++++++++++++++++++++++++++++++++++++ 1 file changed, 114 insertions(+) diff --git a/xen/drivers/passthrough/vtd/vvtd.c b/xen/drivers/passthrough/vtd/vvtd.c index 353fafe..94680e6 100644 --- a/xen/drivers/passthrough/vtd/vvtd.c +++ b/xen/drivers/passthrough/vtd/vvtd.c @@ -50,6 +50,38 @@ struct vvtd { struct page_info *regs_page; }; +#define __DEBUG_VVTD__ +#ifdef __DEBUG_VVTD__ +extern unsigned int vvtd_debug_level; +#define VVTD_DBG_INFO 1 +#define VVTD_DBG_TRANS (1<<1) +#define VVTD_DBG_RW (1<<2) +#define VVTD_DBG_FAULT (1<<3) +#define VVTD_DBG_EOI (1<<4) +#define VVTD_DEBUG(lvl, _f, _a...) do { \ + if ( vvtd_debug_level & lvl ) \ + printk("VVTD %s:" _f "\n", __func__, ## _a); \ +} while(0) +#else +#define VVTD_DEBUG(fmt...) do {} while(0) +#endif + +unsigned int vvtd_debug_level __read_mostly; +integer_param("vvtd_debug", vvtd_debug_level); + +struct vvtd *domain_vvtd(struct domain *d) +{ + struct viommu_info *info = &d->viommu; + + BUILD_BUG_ON(NR_VIOMMU_PER_DOMAIN != 1); + return (info && info->viommu[0]) ? info->viommu[0]->priv : NULL; +} + +static inline struct vvtd *vcpu_vvtd(struct vcpu *v) +{ + return domain_vvtd(v->domain); +} + static inline void vvtd_set_reg(struct vvtd *vtd, uint32_t reg, uint32_t value) { @@ -76,6 +108,87 @@ static inline uint8_t vvtd_get_reg_byte(struct vvtd *vtd, uint32_t reg) vvtd_set_reg(vvtd, (reg) + 4, (val) >> 32); \ } while(0) +static int vvtd_range(struct vcpu *v, unsigned long addr) +{ + struct vvtd *vvtd = vcpu_vvtd(v); + + if ( vvtd ) + return (addr >= vvtd->base_addr) && + (addr < vvtd->base_addr + PAGE_SIZE); + return 0; +} + +static int vvtd_read(struct vcpu *v, unsigned long addr, + unsigned int len, unsigned long *pval) +{ + struct vvtd *vvtd = vcpu_vvtd(v); + unsigned int offset = addr - vvtd->base_addr; + unsigned int offset_aligned = offset & ~3; + + VVTD_DEBUG(VVTD_DBG_RW, "READ INFO: offset %x len %d.", offset, len); + + if ( !pval ) + return X86EMUL_UNHANDLEABLE; + + if ( (offset & 3) || ((len != 4) && (len != 8)) ) + { + VVTD_DEBUG(VVTD_DBG_RW, "Alignment or length is not canonical"); + return X86EMUL_UNHANDLEABLE; + } + + if ( len == 4 ) + *pval = vvtd_get_reg(vvtd, offset_aligned); + else + vvtd_get_reg_quad(vvtd, offset_aligned, *pval); + return X86EMUL_OKAY; +} + +static int vvtd_write(struct vcpu *v, unsigned long addr, + unsigned int len, unsigned long val) +{ + struct vvtd *vvtd = vcpu_vvtd(v); + unsigned int offset = addr - vvtd->base_addr; + unsigned int offset_aligned = offset & ~0x3; + int ret; + + VVTD_DEBUG(VVTD_DBG_RW, "WRITE INFO: offset %x len %d val %lx.", + offset, len, val); + + if ( (offset & 3) || ((len != 4) && (len != 8)) ) + { + VVTD_DEBUG(VVTD_DBG_RW, "Alignment or length is not canonical"); + return X86EMUL_UNHANDLEABLE; + } + + ret = X86EMUL_UNHANDLEABLE; + if ( len == 4 ) + { + switch ( offset_aligned ) + { + case DMAR_IEDATA_REG: + case DMAR_IEADDR_REG: + case DMAR_IEUADDR_REG: + case DMAR_FEDATA_REG: + case DMAR_FEADDR_REG: + case DMAR_FEUADDR_REG: + vvtd_set_reg(vvtd, offset_aligned, val); + ret = X86EMUL_OKAY; + break; + + default: + break; + } + } + + return ret; +} + +static const struct hvm_mmio_ops vvtd_mmio_ops = { + .check = vvtd_range, + .read = vvtd_read, + .write = vvtd_write +}; + static void vvtd_reset(struct vvtd *vvtd, uint64_t capability) { uint64_t cap = DMA_CAP_NFR | DMA_CAP_SLLPS | DMA_CAP_FRO | @@ -122,6 +235,7 @@ static int vvtd_create(struct domain *d, struct viommu *viommu) vvtd->length = viommu->length; vvtd->domain = d; vvtd->status = VIOMMU_STATUS_DEFAULT; + register_mmio_handler(d, &vvtd_mmio_ops); return 0; out2: