From: Ben Warren <b...@skyportsystems.com>
This is initially used to patch a 64-bit address into the VM Generation ID SSDT
Signed-off-by: Ben Warren <b...@skyportsystems.com>
---
hw/acpi/aml-build.c | 28 ++++++++++++++++++++++++++++
include/hw/acpi/aml-build.h | 4 ++++
2 files changed, 32 insertions(+)
diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index b2a1e40..dc4edc2 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -285,6 +285,34 @@ build_append_named_dword(GArray *array, const char
*name_format, ...)
return offset;
}
+/*
+ * Build NAME(XXXX, 0x00000000) where 0x00000000 is encoded as a qword,
+ * and return the offset to 0x00000000 for runtime patching.
+ *
+ * Warning: runtime patching is best avoided. Only use this as
+ * a replacement for DataTableRegion (for guests that don't
+ * support it).
+ */
+int
+build_append_named_qword(GArray *array, const char *name_format, ...)
+{
+ int offset;
+ va_list ap;
+
+ build_append_byte(array, 0x08); /* NameOp */
+ va_start(ap, name_format);
+ build_append_namestringv(array, name_format, ap);
+ va_end(ap);
+
+ build_append_byte(array, 0x0E); /* QWordPrefix */
+
+ offset = array->len;
+ build_append_int_noprefix(array, 0x00000000, 8);
+ assert(array->len == offset + 8);
+
+ return offset;
+}
+
static GPtrArray *alloc_list;
static Aml *aml_alloc(void)
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index 559326c..dbf63cf 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -385,6 +385,10 @@ int
build_append_named_dword(GArray *array, const char *name_format, ...)
GCC_FMT_ATTR(2, 3);
+int
+build_append_named_qword(GArray *array, const char *name_format, ...)
+GCC_FMT_ATTR(2, 3);
+
void build_srat_memory(AcpiSratMemoryAffinity *numamem, uint64_t base,
uint64_t len, int node, MemoryAffinityFlags flags);
--
2.7.4
