From patchwork Fri Mar 4 06:15:44 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Zhao X-Patchwork-Id: 63514 Delivered-To: patch@linaro.org Received: by 10.112.199.169 with SMTP id jl9csp291889lbc; Thu, 3 Mar 2016 22:19:04 -0800 (PST) X-Received: by 10.28.179.7 with SMTP id c7mr3284560wmf.46.1457072338044; Thu, 03 Mar 2016 22:18:58 -0800 (PST) Return-Path: Received: from lists.xenproject.org (lists.xenproject.org. [192.237.175.120]) by mx.google.com with ESMTPS id h130si2284526wmh.7.2016.03.03.22.18.57 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 03 Mar 2016 22:18:58 -0800 (PST) Received-SPF: neutral (google.com: 192.237.175.120 is neither permitted nor denied by best guess record for domain of xen-devel-bounces@lists.xen.org) client-ip=192.237.175.120; Authentication-Results: mx.google.com; spf=neutral (google.com: 192.237.175.120 is neither permitted nor denied by best guess record for domain of xen-devel-bounces@lists.xen.org) smtp.mailfrom=xen-devel-bounces@lists.xen.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xen.org with esmtp (Exim 4.84) (envelope-from ) id 1abj3E-0005RY-7P; Fri, 04 Mar 2016 06:17:24 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.84) (envelope-from ) id 1abj3C-0005RD-Lp for xen-devel@lists.xen.org; Fri, 04 Mar 2016 06:17:22 +0000 Received: from [193.109.254.147] by server-4.bemta-14.messagelabs.com id 67/6D-03301-27829D65; Fri, 04 Mar 2016 06:17:22 +0000 X-Env-Sender: zhaoshenglong@huawei.com X-Msg-Ref: server-5.tower-27.messagelabs.com!1457072233!28695872!1 X-Originating-IP: [58.251.152.64] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 8.11; banners=-,-,- X-VirusChecked: Checked Received: (qmail 26216 invoked from network); 4 Mar 2016 06:17:19 -0000 Received: from szxga01-in.huawei.com (HELO szxga01-in.huawei.com) (58.251.152.64) by server-5.tower-27.messagelabs.com with RC4-SHA encrypted SMTP; 4 Mar 2016 06:17:19 -0000 Received: from 172.24.1.49 (EHLO szxeml428-hub.china.huawei.com) ([172.24.1.49]) by szxrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id DFX12113; Fri, 04 Mar 2016 14:17:07 +0800 (CST) Received: from HGHY1Z002260041.china.huawei.com (10.177.16.142) by szxeml428-hub.china.huawei.com (10.82.67.183) with Microsoft SMTP Server id 14.3.235.1; Fri, 4 Mar 2016 14:16:33 +0800 From: Shannon Zhao To: Date: Fri, 4 Mar 2016 14:15:44 +0800 Message-ID: <1457072152-16128-15-git-send-email-zhaoshenglong@huawei.com> X-Mailer: git-send-email 1.9.0.msysgit.0 In-Reply-To: <1457072152-16128-1-git-send-email-zhaoshenglong@huawei.com> References: <1457072152-16128-1-git-send-email-zhaoshenglong@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.177.16.142] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090203.56D92864.009D, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: e1105f68cf3b1ec31ba7a7b46295c42f Cc: hangaohuai@huawei.com, stefano.stabellini@citrix.com, shannon.zhao@linaro.org, zhaoshenglong@huawei.com Subject: [Xen-devel] [PATCH v5 14/22] arm/acpi: Create min DT stub for Dom0 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: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" From: Shannon Zhao Create a DT for Dom0 for ACPI-case only. DT contains minimal required informations such as Dom0 bootargs, initrd, efi description table and address of uefi memory table. Also port the document of this device tree bindings from Linux. Signed-off-by: Naresh Bhat Signed-off-by: Parth Dixit Signed-off-by: Shannon Zhao --- v5: change the file name --- docs/misc/arm/device-tree/uefi.txt | 58 +++++++++++++++ xen/arch/arm/domain_build.c | 143 +++++++++++++++++++++++++++++++++++++ xen/arch/arm/efi/efi-dom0.c | 48 +++++++++++++ xen/include/asm-arm/setup.h | 2 + 4 files changed, 251 insertions(+) create mode 100644 docs/misc/arm/device-tree/uefi.txt diff --git a/docs/misc/arm/device-tree/uefi.txt b/docs/misc/arm/device-tree/uefi.txt new file mode 100644 index 0000000..41a8be0 --- /dev/null +++ b/docs/misc/arm/device-tree/uefi.txt @@ -0,0 +1,58 @@ +* Xen hypervisor device tree bindings + +Xen ARM virtual platforms shall have a top-level "hypervisor" node with +the following properties: + +- compatible: + compatible = "xen,xen-", "xen,xen"; + where is the version of the Xen ABI of the platform. + +- reg: specifies the base physical address and size of a region in + memory where the grant table should be mapped to, using an + HYPERVISOR_memory_op hypercall. The memory region is large enough to map + the whole grant table (it is larger or equal to gnttab_max_grant_frames()). + +- interrupts: the interrupt used by Xen to inject event notifications. + A GIC node is also required. + +To support UEFI on Xen ARM virtual platforms, Xen populates the FDT "uefi" node +under /hypervisor with following parameters: + +________________________________________________________________________________ +Name | Size | Description +================================================================================ +xen,uefi-system-table | 64-bit | Guest physical address of the UEFI System + | | Table. +-------------------------------------------------------------------------------- +xen,uefi-mmap-start | 64-bit | Guest physical address of the UEFI memory + | | map. +-------------------------------------------------------------------------------- +xen,uefi-mmap-size | 32-bit | Size in bytes of the UEFI memory map + | | pointed to in previous entry. +-------------------------------------------------------------------------------- +xen,uefi-mmap-desc-size | 32-bit | Size in bytes of each entry in the UEFI + | | memory map. +-------------------------------------------------------------------------------- +xen,uefi-mmap-desc-ver | 32-bit | Version of the mmap descriptor format. +-------------------------------------------------------------------------------- + +Example (assuming #address-cells = <2> and #size-cells = <2>): + +hypervisor { + compatible = "xen,xen-4.3", "xen,xen"; + reg = <0 0xb0000000 0 0x20000>; + interrupts = <1 15 0xf08>; + uefi { + xen,uefi-system-table = <0xXXXXXXXX>; + xen,uefi-mmap-start = <0xXXXXXXXX>; + xen,uefi-mmap-size = <0xXXXXXXXX>; + xen,uefi-mmap-desc-size = <0xXXXXXXXX>; + xen,uefi-mmap-desc-ver = <0xXXXXXXXX>; + }; +}; + +The format and meaning of the "xen,uefi-*" parameters are similar to those in +Documentation/arm/uefi.txt in Linux, which are provided by the regular Linux +UEFI stub. However they differ because they are provided by the Xen hypervisor, +together with a set of UEFI runtime services implemented via hypercalls, see +xen/include/public/platform.h. diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index e036887..6726e45 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -1357,6 +1357,145 @@ static int prepare_dtb(struct domain *d, struct kernel_info *kinfo) } #ifdef CONFIG_ACPI +#define ACPI_DOM0_FDT_MIN_SIZE 4096 + +static int make_chosen_node(const struct kernel_info *kinfo, + struct membank tbl_add[]) +{ + int res; + const char *bootargs = NULL; + const struct bootmodule *mod = kinfo->kernel_bootmodule; + void *fdt = kinfo->fdt; + + DPRINT("Create chosen node\n"); + res = fdt_begin_node(fdt, "chosen"); + if ( res ) + return res; + + if ( mod && mod->cmdline[0] ) + { + bootargs = &mod->cmdline[0]; + res = fdt_property(fdt, "bootargs", bootargs, strlen(bootargs) + 1); + if ( res ) + return res; + } + + /* + * If the bootloader provides an initrd, we must create a placeholder + * for the initrd properties. The values will be replaced later. + */ + if ( mod && mod->size ) + { + u64 a = 0; + res = fdt_property(kinfo->fdt, "linux,initrd-start", &a, sizeof(a)); + if ( res ) + return res; + + res = fdt_property(kinfo->fdt, "linux,initrd-end", &a, sizeof(a)); + if ( res ) + return res; + } + + res = fdt_end_node(fdt); + + return res; +} + +static int acpi_make_hypervisor_node(const struct kernel_info *kinfo, + struct membank tbl_add[]) +{ + const char compat[] = + "xen,xen-"__stringify(XEN_VERSION)"."__stringify(XEN_SUBVERSION)"\0" + "xen,xen"; + int res; + /* Convenience alias */ + void *fdt = kinfo->fdt; + + DPRINT("Create hypervisor node\n"); + + /* See linux Documentation/devicetree/bindings/arm/xen.txt */ + res = fdt_begin_node(fdt, "hypervisor"); + if ( res ) + return res; + + /* Cannot use fdt_property_string due to embedded nulls */ + res = fdt_property(fdt, "compatible", compat, sizeof(compat)); + if ( res ) + return res; + + res = arm_acpi_make_efi_nodes(fdt, tbl_add); + if ( res ) + return res; + + res = fdt_end_node(fdt); + + return res; +} + +/* + * Prepare a minimal DTB for Dom0 which contains bootargs, initrd, memory + * information, EFI table. + */ +static int create_acpi_dtb(struct kernel_info *kinfo, struct membank tbl_add[]) +{ + int new_size; + int ret; + + DPRINT("Prepare a min DTB for DOM0\n"); + + /* Allocate min size for DT */ + new_size = ACPI_DOM0_FDT_MIN_SIZE; + kinfo->fdt = xmalloc_bytes(new_size); + + if ( kinfo->fdt == NULL ) + return -ENOMEM; + + /* Create a new empty DT for DOM0 */ + ret = fdt_create(kinfo->fdt, new_size); + if ( ret < 0 ) + goto err; + + ret = fdt_finish_reservemap(kinfo->fdt); + if ( ret < 0 ) + goto err; + + ret = fdt_begin_node(kinfo->fdt, "/"); + if ( ret < 0 ) + goto err; + + ret = fdt_property_cell(kinfo->fdt, "#address-cells", 2); + if ( ret ) + return ret; + + ret = fdt_property_cell(kinfo->fdt, "#size-cells", 1); + if ( ret ) + return ret; + + /* Create a chosen node for DOM0 */ + ret = make_chosen_node(kinfo, tbl_add); + if ( ret ) + goto err; + + ret = acpi_make_hypervisor_node(kinfo, tbl_add); + if ( ret ) + goto err; + + ret = fdt_end_node(kinfo->fdt); + if ( ret < 0 ) + goto err; + + ret = fdt_finish(kinfo->fdt); + if ( ret < 0 ) + goto err; + + return 0; + + err: + printk("Device tree generation failed (%d).\n", ret); + xfree(kinfo->fdt); + return -EINVAL; +} + static void acpi_map_other_tables(struct domain *d) { int i; @@ -1706,6 +1845,10 @@ static int prepare_acpi(struct domain *d, struct kernel_info *kinfo) return rc; } + rc = create_acpi_dtb(kinfo, tbl_add); + if ( rc != 0 ) + return rc; + return 0; } #else diff --git a/xen/arch/arm/efi/efi-dom0.c b/xen/arch/arm/efi/efi-dom0.c index 0ff6309..3a7b601 100644 --- a/xen/arch/arm/efi/efi-dom0.c +++ b/xen/arch/arm/efi/efi-dom0.c @@ -23,6 +23,7 @@ #include "efi.h" #include +#include #include #include @@ -137,3 +138,50 @@ void __init acpi_create_efi_mmap_table(paddr_t paddr, paddr_t size, tbl_add[TBL_MMAP].size = sizeof(EFI_MEMORY_DESCRIPTOR) * (mem->nr_banks + acpi_mem_nr_banks + 1); } + +/* Create place holder for efi values. */ +int __init arm_acpi_make_efi_nodes(void *fdt, struct membank tbl_add[]) +{ + u64 fdt_val64; + u32 fdt_val32; + int desc_ver = 1; + int res; + + res = fdt_begin_node(fdt, "uefi"); + if ( res ) + return res; + + fdt_val64 = cpu_to_fdt64(tbl_add[TBL_EFIT].start); + res = fdt_property(fdt, "xen,uefi-system-table", + &fdt_val64, sizeof(fdt_val64)); + if ( res ) + return res; + + fdt_val64 = cpu_to_fdt64(tbl_add[TBL_MMAP].start); + res = fdt_property(fdt, "xen,uefi-mmap-start", + &fdt_val64, sizeof(fdt_val64)); + if ( res ) + return res; + + fdt_val32 = cpu_to_fdt32(tbl_add[TBL_MMAP].size); + res = fdt_property(fdt, "xen,uefi-mmap-size", + &fdt_val32, sizeof(fdt_val32)); + if ( res ) + return res; + + fdt_val32 = cpu_to_fdt32(sizeof(EFI_MEMORY_DESCRIPTOR)); + res = fdt_property(fdt, "xen,uefi-mmap-desc-size", + &fdt_val32, sizeof(fdt_val32)); + if ( res ) + return res; + + fdt_val32 = cpu_to_fdt32(desc_ver); + res = fdt_property(fdt, "xen,uefi-mmap-desc-ver", + &fdt_val32, sizeof(fdt_val32)); + if ( res ) + return res; + + res = fdt_end_node(fdt); + + return res; +} diff --git a/xen/include/asm-arm/setup.h b/xen/include/asm-arm/setup.h index b2899f2..05f0210 100644 --- a/xen/include/asm-arm/setup.h +++ b/xen/include/asm-arm/setup.h @@ -61,6 +61,8 @@ void acpi_create_efi_mmap_table(paddr_t paddr, paddr_t size, const struct meminfo *mem, struct membank tbl_add[]); +int arm_acpi_make_efi_nodes(void *fdt, struct membank tbl_add[]); + int construct_dom0(struct domain *d); void discard_initial_modules(void);