[PATCH v6 10/12] x86/hyperlaunch: add memory parsing to domain config

[Alejandro Vallejo <agarciav@xxxxxxx>]

From: "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>

Add three properties, memory, mem-min, and mem-max, to the domain node device
tree parsing to define the memory allocation for a domain. All three fields are
expressed in kb and written as a u64 in the device tree entries.

Signed-off-by: Daniel P. Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Jason Andryuk <jason.andryuk@xxxxxxx>
Signed-off-by: Alejandro Vallejo <agarciav@xxxxxxx>
Reviewed-by: Denis Mukhin <dmukhin@xxxxxxxx>
---
 xen/arch/x86/dom0_build.c              |  8 +++++
 xen/arch/x86/include/asm/boot-domain.h |  4 +++
 xen/arch/x86/setup.c                   |  5 ++-
 xen/common/domain-builder/fdt.c        | 46 ++++++++++++++++++++++++++
 4 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/xen/arch/x86/dom0_build.c b/xen/arch/x86/dom0_build.c
index 0b467fd4a4..8db24dbc0a 100644
--- a/xen/arch/x86/dom0_build.c
+++ b/xen/arch/x86/dom0_build.c
@@ -627,6 +627,14 @@ int __init construct_dom0(const struct boot_domain *bd)
 
     process_pending_softirqs();
 
+    /* If param dom0_size was not set and HL config provided memory size */
+    if ( !get_memsize(&dom0_size, ULONG_MAX) && bd->mem_pages )
+        dom0_size.nr_pages = bd->mem_pages;
+    if ( !get_memsize(&dom0_min_size, ULONG_MAX) && bd->min_pages )
+        dom0_min_size.nr_pages = bd->min_pages;
+    if ( !get_memsize(&dom0_max_size, ULONG_MAX) && bd->max_pages )
+        dom0_max_size.nr_pages = bd->max_pages;
+
     if ( is_hvm_domain(d) )
         rc = dom0_construct_pvh(bd);
     else if ( is_pv_domain(d) )
diff --git a/xen/arch/x86/include/asm/boot-domain.h 
b/xen/arch/x86/include/asm/boot-domain.h
index e316d4bcde..fa8ea1cc66 100644
--- a/xen/arch/x86/include/asm/boot-domain.h
+++ b/xen/arch/x86/include/asm/boot-domain.h
@@ -18,6 +18,10 @@ struct boot_domain {
 #define BUILD_MODE_ENABLE_DM     (1 << 1) /* HVM    | PVH     */
     uint32_t mode;
 
+    unsigned long mem_pages;
+    unsigned long min_pages;
+    unsigned long max_pages;
+
     struct boot_module *kernel;
     struct boot_module *module;
     const char *cmdline;
diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c
index 343f87ee9d..4a3c41ad71 100644
--- a/xen/arch/x86/setup.c
+++ b/xen/arch/x86/setup.c
@@ -297,7 +297,10 @@ static const char *cmdline_cook(const char *p, const char 
*loader_name);
 struct boot_info __initdata xen_boot_info = {
     .loader = "unknown",
     .cmdline = "",
-    .domains = { [0 ... MAX_NR_BOOTDOMS - 1] = { .domid = DOMID_INVALID } },
+    .domains = { [0 ... MAX_NR_BOOTDOMS - 1] = {
+        .domid = DOMID_INVALID,
+        .max_pages = ULONG_MAX,
+    }},
 };
 
 static struct boot_info *__init multiboot_fill_boot_info(
diff --git a/xen/common/domain-builder/fdt.c b/xen/common/domain-builder/fdt.c
index aadca11dfa..d9babe9d56 100644
--- a/xen/common/domain-builder/fdt.c
+++ b/xen/common/domain-builder/fdt.c
@@ -7,6 +7,7 @@
 #include <xen/init.h>
 #include <xen/lib.h>
 #include <xen/libfdt/libfdt.h>
+#include <xen/sizes.h>
 
 #include <asm/bootinfo.h>
 #include <asm/page.h>
@@ -24,6 +25,16 @@ static int __init fdt_prop_as_u32(const struct fdt_property 
*prop,
     return 0;
 }
 
+static int __init fdt_prop_as_u64(const struct fdt_property *prop,
+                                  uint64_t *val)
+{
+    if ( !prop || fdt32_to_cpu(prop->len) < sizeof(uint64_t) )
+        return -EINVAL;
+
+    *val = fdt64_to_cpu(*(const fdt64_t *)prop->data);
+    return 0;
+}
+
 /*
  * Unpacks a "reg" property into its address and size constituents.
  *
@@ -256,6 +267,41 @@ static int __init fdt_process_domain_node(
                    (bd->mode & BUILD_MODE_ENABLE_DM) ? "hvm" :
                                                        "pvh");
         }
+        else if ( !strncmp(prop_name, "memory", name_len) )
+        {
+            uint64_t kb;
+            if ( (rc = fdt_prop_as_u64(prop, &kb)) )
+            {
+                printk(XENLOG_ERR "  bad \"memory\" prop on domain %s\n", 
name);
+                return rc;
+            }
+            bd->mem_pages = PFN_DOWN(kb * SZ_1K);
+            printk(XENLOG_ERR "  memory: %lu KiB\n", kb);
+        }
+        else if ( !strncmp(prop_name, "mem-min", name_len) )
+        {
+            uint64_t kb;
+            if ( (rc = fdt_prop_as_u64(prop, &kb)) )
+            {
+                printk(XENLOG_ERR
+                       "  bad \"mem-min\" prop on domain %s\n", name);
+                return rc;
+            }
+            bd->min_pages = PFN_DOWN(kb * SZ_1K);
+            printk(XENLOG_INFO "  min memory: %lu kb\n", kb);
+        }
+        else if ( !strncmp(prop_name, "mem-max", name_len) )
+        {
+            uint64_t kb;
+            if ( (rc = fdt_prop_as_u64(prop, &kb)) )
+            {
+                printk(XENLOG_ERR
+                       "  bad \"mem-max\" prop on domain %s\n", name);
+                return rc;
+            }
+            bd->max_pages = PFN_DOWN(kb * SZ_1K);
+            printk(XENLOG_INFO "  max memory: %lu KiB\n", kb);
+        }
     }
 
     fdt_for_each_subnode(node, fdt, dom_node)
-- 
2.43.0