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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Jun 2021 02:44:12.4672 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f9e3e0da-1eba-4377-8046-08d9295e221a X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: AM5EUR03FT035.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: HE1PR0802MB2585 This commit checks `xen,static-mem` device tree property in /domUx node, to determine whether domain is on Static Allocation, when constructing domain during boot-up. Right now, the implementation of allocate_static_memory is missing, and will be introduced later. It just BUG() out at the moment. And if the `memory` property and `xen,static-mem` are both set, it shall be verified that if the memory size defined in both is consistent. Signed-off-by: Penny Zheng --- changes v2: - remove parsing procedure here - check the consistency when `xen,static-mem` and `memory` are both defined --- xen/arch/arm/domain_build.c | 37 +++++++++++++++++++++++++++++++------ 1 file changed, 31 insertions(+), 6 deletions(-) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 282416e74d..4166d7993c 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -2424,23 +2424,47 @@ static int __init construct_domU(struct domain *d, { struct kernel_info kinfo = {}; int rc; - u64 mem; + u64 mem, static_mem_size = 0; + const struct dt_property *prop; + bool static_mem = false; + + d->max_pages = ~0U; + /* + * Guest RAM could be of static memory from static allocation, + * which will be specified through "xen,static-mem" phandle. + */ + prop = dt_find_property(node, "xen,static-mem", NULL); + if ( prop ) + { + static_mem = true; + /* static_mem_size = allocate_static_memory(...); */ + BUG(); + } rc = dt_property_read_u64(node, "memory", &mem); - if ( !rc ) + if ( !static_mem && !rc ) { printk("Error building DomU: cannot read \"memory\" property\n"); return -EINVAL; + } else if ( rc && static_mem ) + { + if ( static_mem_size != mem * SZ_1K ) + { + printk("Memory size in \"memory\" property isn't consistent with" + "the ones defined in \"xen,static-mem\".\n"); + return -EINVAL; + } } - kinfo.unassigned_mem = (paddr_t)mem * SZ_1K; + kinfo.unassigned_mem = static_mem ? 0 : (paddr_t)mem * SZ_1K; - printk("*** LOADING DOMU cpus=%u memory=%"PRIx64"KB ***\n", d->max_vcpus, mem); + printk("*** LOADING DOMU cpus=%u memory=%"PRIx64"KB ***\n", + d->max_vcpus, + static_mem ? static_mem_size : (kinfo.unassigned_mem) >> 10); kinfo.vpl011 = dt_property_read_bool(node, "vpl011"); if ( vcpu_create(d, 0) == NULL ) return -ENOMEM; - d->max_pages = ~0U; kinfo.d = d; @@ -2452,7 +2476,8 @@ static int __init construct_domU(struct domain *d, /* type must be set before allocate memory */ d->arch.type = kinfo.type; #endif - allocate_memory(d, &kinfo); + if ( !static_mem ) + allocate_memory(d, &kinfo); rc = prepare_dtb_domU(d, &kinfo); if ( rc < 0 ) -- 2.25.1