[Xen-devel] [PATCH 13/14] libxl/arm: initialize memory information of ACPI blob

[Shannon Zhao <zhaoshenglong@xxxxxxxxxx>]

From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>

Assign the guest memory space for ACPI tables and replace the reg in DT
with real values.

Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
---
 tools/libxc/xc_dom_arm.c | 16 +++++++++++++++-
 tools/libxl/libxl_arm.c  | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+), 1 deletion(-)

diff --git a/tools/libxc/xc_dom_arm.c b/tools/libxc/xc_dom_arm.c
index 64a8b67..e21e3e9 100644
--- a/tools/libxc/xc_dom_arm.c
+++ b/tools/libxc/xc_dom_arm.c
@@ -383,9 +383,11 @@ static int meminit(struct xc_dom_image *dom)
     const uint64_t kernsize = kernend - kernbase;
     const uint64_t dtb_size = dom->devicetree_blob ?
         ROUNDUP(dom->devicetree_size, XC_PAGE_SHIFT) : 0;
+    const uint64_t acpi_size = dom->acpitable_blob ?
+        ROUNDUP(dom->acpitable_size, XC_PAGE_SHIFT) : 0;
     const uint64_t ramdisk_size = dom->ramdisk_blob ?
         ROUNDUP(dom->ramdisk_size, XC_PAGE_SHIFT) : 0;
-    const uint64_t modsize = dtb_size + ramdisk_size;
+    const uint64_t modsize = dtb_size + acpi_size + ramdisk_size;
     const uint64_t ram128mb = bankbase[0] + (128<<20);
 
     xen_pfn_t p2m_size;
@@ -500,6 +502,18 @@ static int meminit(struct xc_dom_image *dom)
         modbase += dtb_size;
     }
 
+    if ( acpi_size )
+    {
+        dom->acpi_seg.vstart = modbase;
+        dom->acpi_seg.vend = modbase + acpi_size;
+
+        DOMPRINTF("%s: acpi: 0x%" PRIx64 " -> 0x%" PRIx64 "",
+                  __FUNCTION__,
+                  dom->acpi_seg.vstart, dom->acpi_seg.vend);
+
+        modbase += dtb_size;
+    }
+
     return 0;
 }
 
diff --git a/tools/libxl/libxl_arm.c b/tools/libxl/libxl_arm.c
index e7cb578..bf1eeea 100644
--- a/tools/libxl/libxl_arm.c
+++ b/tools/libxl/libxl_arm.c
@@ -230,6 +230,27 @@ static int fdt_property_regs(libxl__gc *gc, void *fdt,
     return fdt_property(fdt, "reg", regs, sizeof(regs));
 }
 
+static int fdt_property_inplace_regs(void *fdt, int nodeoffset,
+                                     unsigned addr_cells, unsigned size_cells,
+                                     unsigned num_regs, ...)
+{
+    uint32_t regs[num_regs*(addr_cells+size_cells)];
+    be32 *cells = &regs[0];
+    int i;
+    va_list ap;
+    uint64_t base, size;
+
+    va_start(ap, num_regs);
+    for (i = 0 ; i < num_regs; i++) {
+        base = addr_cells ? va_arg(ap, uint64_t) : 0;
+        size = size_cells ? va_arg(ap, uint64_t) : 0;
+        set_range(&cells, addr_cells, size_cells, base, size);
+    }
+    va_end(ap);
+
+    return fdt_setprop_inplace(fdt, nodeoffset, "reg", regs, sizeof(regs));
+}
+
 static int make_root_properties(libxl__gc *gc,
                                 const libxl_version_info *vers,
                                 void *fdt)
@@ -1209,6 +1230,8 @@ int libxl__arch_domain_finalise_hw_description(libxl__gc 
*gc,
 
     const struct xc_dom_seg *ramdisk = dom->ramdisk_blob ?
         &dom->ramdisk_seg : NULL;
+    const struct xc_dom_seg *acpi = dom->acpitable_blob ?
+        &dom->acpi_seg : NULL;
 
     if (ramdisk) {
         int chosen, res;
@@ -1238,6 +1261,23 @@ int libxl__arch_domain_finalise_hw_description(libxl__gc 
*gc,
 
     }
 
+    if (acpi)
+    {
+        int module, res;
+
+        module = fdt_path_offset(fdt, "/chosen/modules/module@0");
+        assert(module > 0);
+
+        LOG(DEBUG, "/chosen/modules/module@0 updating acpi properties to cover 
"
+            "%"PRIx64"-%"PRIx64,
+            acpi->vstart, acpi->vend);
+
+        res = fdt_property_inplace_regs(fdt, module, ROOT_ADDRESS_CELLS,
+                                        ROOT_SIZE_CELLS, 1, acpi->vstart,
+                                        acpi->vend - acpi->vstart + 1);
+        assert(!res);
+    }
+
     for (i = 0; i < GUEST_RAM_BANKS; i++) {
         const uint64_t size = (uint64_t)dom->rambank_size[i] << XC_PAGE_SHIFT;
 
-- 
2.0.4



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