[Xen-devel] [PATCH RFC 19/20] acpi: Set HW_REDUCED_ACPI in FADT if IOAPIC is not supported

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

With this flags set guests will not try to set up SCI.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
---
 xen/common/libacpi/build.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xen/common/libacpi/build.c b/xen/common/libacpi/build.c
index e53b4a7..7f2662a 100644
--- a/xen/common/libacpi/build.c
+++ b/xen/common/libacpi/build.c
@@ -555,6 +555,8 @@ void acpi_build_tables(struct acpi_config *config, unsigned 
long physical)
     fadt->x_dsdt = config->mem_ops.v2p(dsdt);
     fadt->firmware_ctrl   = config->mem_ops.v2p(facs);
     fadt->x_firmware_ctrl = config->mem_ops.v2p(facs);
+    if ( !(config->table_flags & ACPI_BUILD_IOAPIC) )
+        fadt->flags |= (1<<20); /* HW_REDUCED_ACPI */
     set_checksum(fadt,
                  offsetof(struct acpi_header, checksum),
                  sizeof(struct acpi_20_fadt));
-- 
2.4.3


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel