From: Len Brown <len.br...@intel.com> Ported from Linux commit 9e3a9d1ed8cc8db93e5c53e9a5b09065bd95de8b.
When ACPI is disabled in the BIOS of this VIA C3 box, it invalidates the RSDP, which Linux notices: ACPI Error (tbxfroot-0218): A valid RSDP was not found [20080926] Bug Linux neglected to disable ACPI at that stage, and later scribbled on smp_found_config: ACPI: No APIC-table, disabling MPS But this box doesn't run well in legacy PIC mode, it needed IOAPIC mode to perform correctly: http://lkml.org/lkml/2009/2/5/39 So exit ACPI mode cleanly when we first detect that it is hopeless. Signed-off-by: Len Brown <len.br...@intel.com> Signed-off-by: Shannon Zhao <shannon.z...@linaro.org> --- xen/drivers/acpi/tables.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/xen/drivers/acpi/tables.c b/xen/drivers/acpi/tables.c index 1da2127..6085fda 100644 --- a/xen/drivers/acpi/tables.c +++ b/xen/drivers/acpi/tables.c @@ -329,7 +329,12 @@ static void __init check_multiple_madt(void) int __init acpi_table_init(void) { - acpi_initialize_tables(NULL, ACPI_MAX_TABLES, 0); + acpi_status status; + + status = acpi_initialize_tables(NULL, ACPI_MAX_TABLES, 0); + if (ACPI_FAILURE(status)) + return 1; + check_multiple_madt(); return 0; } -- 2.0.4 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
