This patch appends "ACPI0007" as the HID to each processor object.
Until commit 20843d processor objects used to have a _HID. According
to the ACPI spec this is not required but removing it breaks systems
which relied on the HID. As it does no harm it is safe to add _HID
to processor objects and restore the old behaviour.
Signed-off-by: Matthias Lange <matthias.la...@kernkonzept.com>
---
hw/i386/acpi-build.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 95e0c65..314cd0b 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1153,6 +1153,9 @@ build_ssdt(GArray *table_data, GArray *linker,
for (i = 0; i < acpi_cpus; i++) {
dev = aml_processor(i, 0, 0, "CP%.02X", i);
+ /* for processor objects a _HID is not strictly required, however
it
+ * does no harm and preserves compatibility with other BIOSes */
+ aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007")));
method = aml_method("_MAT", 0);
aml_append(method, aml_return(aml_call1("CPMA", aml_int(i))));
aml_append(dev, method);
--
1.9.1
