[Xen-changelog] [xen-unstable] [IA64] MCA support - Disable CPE interrupt mode for dom0

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User awilliam@xxxxxxxxxxx
# Node ID 344fc55eb52fec67bd8cb54cb629fce1ca23485a
# Parent  cef0cc0a3236f425e377fe97ee8846adfb6cbd4e
[IA64] MCA support - Disable CPE interrupt mode for dom0

   This patch disables CPE interupt mode for dom0. In current MCA
implementaion, CPE interrupts do not notify to dom0. The dom0 is
expected to get error logs in polling mode.

   Therefore I modified the ACPI table to disable CPE interrupt mode
in before the address of it is passed through to dom0. I think that
there is no problem because the initialization of ACPI is completed by
the passed time even if this modification is added.

Signed-off-by: Yutaka Ezaki <yutaka.ezaki@xxxxxxxxxxxxxx>
Signed-off-by: Masaki Kanno <kanno.masaki@xxxxxxxxxxxxxx>
Signed-off-by: Kazuhiro Suzuki <kaz@xxxxxxxxxxxxxx>
---
 xen/arch/ia64/xen/dom_fw.c |   23 ++++++++++++++++++++++-
 1 files changed, 22 insertions(+), 1 deletion(-)

diff -r cef0cc0a3236 -r 344fc55eb52f xen/arch/ia64/xen/dom_fw.c
--- a/xen/arch/ia64/xen/dom_fw.c        Wed Nov 15 11:34:31 2006 -0700
+++ b/xen/arch/ia64/xen/dom_fw.c        Wed Nov 15 11:55:04 2006 -0700
@@ -240,6 +240,23 @@ acpi_update_lsapic (acpi_table_entry_hea
        return 0;
 }
 
+static int __init
+acpi_patch_plat_int_src (
+       acpi_table_entry_header *header, const unsigned long end)
+{
+       struct acpi_table_plat_int_src *plintsrc;
+
+       plintsrc = (struct acpi_table_plat_int_src *)header;
+       if (!plintsrc)
+               return -EINVAL;
+
+       if (plintsrc->type == ACPI_INTERRUPT_CPEI) {
+               printk("ACPI_INTERRUPT_CPEI disabled for Domain0\n");
+               plintsrc->type = -1;
+       }
+       return 0;
+}
+
 static u8
 generate_acpi_checksum(void *tbl, unsigned long len)
 {
@@ -271,7 +288,11 @@ static void touch_acpi_table(void)
 {
        lsapic_nbr = 0;
        if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_update_lsapic, 0) < 0)
-               printk("Error parsing MADT - no LAPIC entires\n");
+               printk("Error parsing MADT - no LAPIC entries\n");
+       if (acpi_table_parse_madt(ACPI_MADT_PLAT_INT_SRC,
+                                 acpi_patch_plat_int_src, 0) < 0)
+               printk("Error parsing MADT - no PLAT_INT_SRC entries\n");
+
        acpi_table_parse(ACPI_APIC, acpi_update_madt_checksum);
 
        return;

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog