x86: update mptable
make mptable to be consistent with acpi routing, so we could:
1. kexec kernel with acpi=off
2. work around BIOSes where acpi routing is working, but mptable is
not right, so can use kernel/kexec to start other OSes that don't have
good acpi support.
command line: update_mptable
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 2ddfabae..f226bdc 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1154,6 +1154,28 @@
return gsi;
}
+int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
+ u32 gsi, int triggering, int polarity)
+{
+ struct mpc_config_intsrc intsrc;
+ int ioapic;
+
+ /* print the entry should happen on mptable identically */
+ intsrc.mpc_type = MP_INTSRC;
+ intsrc.mpc_irqtype = mp_INT;
+ intsrc.mpc_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
+ (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
+ intsrc.mpc_srcbus = number;
+ intsrc.mpc_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
+ ioapic = mp_find_ioapic(gsi);
+ intsrc.mpc_dstapic = mp_ioapic_routing[ioapic].apic_id;
+ intsrc.mpc_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
+
+ MP_intsrc_info(&intsrc);
+
+ return 0;
+}
+
/*
* Parse IOAPIC related entries in MADT
* returns 0 on success, < 0 on error