@@ -225,6 +225,8 @@ Aml *aml_io(AmlIODecode dec, uint16_t min_base, uint16_t max_base,
uint8_t aln, uint8_t len);
Aml *aml_operation_region(const char *name, AmlRegionSpace rs,
uint32_t offset, uint32_t len);
+Aml *aml_data_table_region(const char *name, Aml *sig, Aml *oem_id,
+ Aml *oem_table_id);
Aml *aml_irq_no_flags(uint8_t irq);
Aml *aml_named_field(const char *name, unsigned length);
Aml *aml_reserved_field(unsigned length);
@@ -788,6 +788,20 @@ Aml *aml_operation_region(const char *name, AmlRegionSpace rs,
return var;
}
+/* ACPI 2.0: 17.2.4.2 Named Objects Encoding: DefDataRegion */
+Aml *aml_data_table_region(const char *name, Aml *sig, Aml *oem_id,
+ Aml *oem_table_id)
+{
+ Aml *var = aml_alloc();
+ build_append_byte(var->buf, 0x5B); /* ExtOpPrefix */
+ build_append_byte(var->buf, 0x88); /* DataRegionOp */
+ build_append_namestring(var->buf, "%s", name);
+ aml_append(var, sig);
+ aml_append(var, oem_id);
+ aml_append(var, oem_table_id);
+ return var;
+}
+
/* ACPI 1.0b: 16.2.5.2 Named Objects Encoding: NamedField */
Aml *aml_named_field(const char *name, unsigned length)
{
This ASL operator (and the underlying AML) enables named ACPI data tables to be located from AML code, and to be accessed field-wise, like an operation region. This is useful for passing down "parameter tables" to the guest; the ACPI linker/loader can relocate pointers in them, and then the AML code can read valid pointer values from the fields in the tables. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Gal Hammer <ghammer@redhat.com> Cc: Igor Mammedov <imammedo@redhat.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Signed-off-by: Laszlo Ersek <lersek@redhat.com> --- include/hw/acpi/aml-build.h | 2 ++ hw/acpi/aml-build.c | 14 ++++++++++++++ 2 files changed, 16 insertions(+)