[Xen-devel] [PATCH v3 39/62] arm/acpi: Read acpi memory info from uefi

[shannon.zhao@xxxxxxxxxx]

From: Parth Dixit <parth.dixit@xxxxxxxxxx>

ACPI memory is seperate from conventional memory and should be marked
as reserved while passing to DOM0. Create a new meminfo structure to
store all the acpi tables listed in uefi.

Signed-off-by: Parth Dixit <parth.dixit@xxxxxxxxxx>
Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
---
 xen/arch/arm/efi/efi-boot.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/xen/arch/arm/efi/efi-boot.h b/xen/arch/arm/efi/efi-boot.h
index e427e5f..c58caca 100644
--- a/xen/arch/arm/efi/efi-boot.h
+++ b/xen/arch/arm/efi/efi-boot.h
@@ -17,6 +17,9 @@ void __flush_dcache_area(const void *vaddr, unsigned long 
size);
 static struct file __initdata dtbfile;
 static void __initdata *fdt;
 static void __initdata *memmap;
+#ifdef CONFIG_ACPI
+static struct meminfo __initdata acpi_mem;
+#endif
 
 static int __init setup_chosen_node(void *fdt, int *addr_cells, int 
*size_cells)
 {
@@ -129,6 +132,9 @@ static EFI_STATUS __init 
efi_process_memory_map_bootinfo(EFI_MEMORY_DESCRIPTOR *
 {
     int Index;
     int i = 0;
+#ifdef CONFIG_ACPI
+    int j = 0;
+#endif
     EFI_MEMORY_DESCRIPTOR *desc_ptr = map;
 
     for ( Index = 0; Index < (mmap_size / desc_size); Index++ )
@@ -148,10 +154,27 @@ static EFI_STATUS __init 
efi_process_memory_map_bootinfo(EFI_MEMORY_DESCRIPTOR *
             bootinfo.mem.bank[i].size = desc_ptr->NumberOfPages * 
EFI_PAGE_SIZE;
             ++i;
         }
+#ifdef CONFIG_ACPI
+        else if ( desc_ptr->Type == EfiACPIReclaimMemory )
+        {
+            if ( j >= NR_MEM_BANKS )
+            {
+                PrintStr(L"Error: All " __stringify(NR_MEM_BANKS)
+                          " acpi meminfo mem banks exhausted.\r\n");
+                return EFI_LOAD_ERROR;
+            }
+            acpi_mem.bank[j].start = desc_ptr->PhysicalStart;
+            acpi_mem.bank[j].size  = desc_ptr->NumberOfPages * EFI_PAGE_SIZE;
+            ++j;
+        }
+#endif
         desc_ptr = NextMemoryDescriptor(desc_ptr, desc_size);
     }
 
     bootinfo.mem.nr_banks = i;
+#ifdef CONFIG_ACPI
+    acpi_mem.nr_banks = j;
+#endif
     return EFI_SUCCESS;
 }
 
-- 
2.1.0


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