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Subject[PATCH] x86: update mptable fix with no ioapic v2
Date

if the system doesn't have ioapic, we don't need to store entries for mptable
update

also let mp_config_acpi_gsi not call func in mpparse
so later could decouple mpparse with acpi more easily

Reported-by: Daniel Exner <dex@dragonslave.de>
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

---
arch/x86/kernel/acpi/boot.c | 87 ++++++++++++++++++++++++++++----------------
arch/x86/kernel/mpparse.c | 19 ++++-----
include/asm-x86/mpspec.h | 2 -
3 files changed, 65 insertions(+), 43 deletions(-)

Index: linux-2.6/arch/x86/kernel/acpi/boot.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/acpi/boot.c
+++ linux-2.6/arch/x86/kernel/acpi/boot.c
@@ -958,10 +958,37 @@ void __init mp_register_ioapic(int id, u
nr_ioapics++;
}

+static void assign_to_mp_irq(struct mp_config_intsrc *m,
+ struct mp_config_intsrc *mp_irq)
+{
+ memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
+}
+
+static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
+ struct mp_config_intsrc *m)
+{
+ return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
+}
+
+static void save_mp_irq(struct mp_config_intsrc *m)
+{
+ int i;
+
+ for (i = 0; i < mp_irq_entries; i++) {
+ if (!mp_irq_cmp(&mp_irqs[i], m))
+ return;
+ }
+
+ assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
+ if (++mp_irq_entries == MAX_IRQ_SOURCES)
+ panic("Max # of irq sources exceeded!!\n");
+}
+
void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
{
int ioapic;
int pin;
+ struct mp_config_intsrc mp_irq;

/*
* Convert 'gsi' to 'ioapic.pin'.
@@ -979,18 +1006,15 @@ void __init mp_override_legacy_irq(u8 bu
if ((bus_irq == 0) && (trigger == 3))
trigger = 1;

- mp_irqs[mp_irq_entries].mp_type = MP_INTSRC;
- mp_irqs[mp_irq_entries].mp_irqtype = mp_INT;
- mp_irqs[mp_irq_entries].mp_irqflag = (trigger << 2) | polarity;
- mp_irqs[mp_irq_entries].mp_srcbus = MP_ISA_BUS;
- mp_irqs[mp_irq_entries].mp_srcbusirq = bus_irq; /* IRQ */
- mp_irqs[mp_irq_entries].mp_dstapic =
- mp_ioapics[ioapic].mp_apicid; /* APIC ID */
- mp_irqs[mp_irq_entries].mp_dstirq = pin; /* INTIN# */
-
- if (++mp_irq_entries == MAX_IRQ_SOURCES)
- panic("Max # of irq sources exceeded!!\n");
+ mp_irq.mp_type = MP_INTSRC;
+ mp_irq.mp_irqtype = mp_INT;
+ mp_irq.mp_irqflag = (trigger << 2) | polarity;
+ mp_irq.mp_srcbus = MP_ISA_BUS;
+ mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
+ mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
+ mp_irq.mp_dstirq = pin; /* INTIN# */

+ save_mp_irq(&mp_irq);
}

void __init mp_config_acpi_legacy_irqs(void)
@@ -998,6 +1022,7 @@ void __init mp_config_acpi_legacy_irqs(v
int i;
int ioapic;
unsigned int dstapic;
+ struct mp_config_intsrc mp_irq;

#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
/*
@@ -1050,16 +1075,15 @@ void __init mp_config_acpi_legacy_irqs(v
continue; /* IRQ already used */
}

- mp_irqs[mp_irq_entries].mp_type = MP_INTSRC;
- mp_irqs[mp_irq_entries].mp_irqflag = 0; /* Conforming */
- mp_irqs[mp_irq_entries].mp_srcbus = MP_ISA_BUS;
- mp_irqs[mp_irq_entries].mp_dstapic = dstapic;
- mp_irqs[mp_irq_entries].mp_irqtype = mp_INT;
- mp_irqs[mp_irq_entries].mp_srcbusirq = i; /* Identity mapped */
- mp_irqs[mp_irq_entries].mp_dstirq = i;
+ mp_irq.mp_type = MP_INTSRC;
+ mp_irq.mp_irqflag = 0; /* Conforming */
+ mp_irq.mp_srcbus = MP_ISA_BUS;
+ mp_irq.mp_dstapic = dstapic;
+ mp_irq.mp_irqtype = mp_INT;
+ mp_irq.mp_srcbusirq = i; /* Identity mapped */
+ mp_irq.mp_dstirq = i;

- if (++mp_irq_entries == MAX_IRQ_SOURCES)
- panic("Max # of irq sources exceeded!!\n");
+ save_mp_irq(&mp_irq);
}
}

@@ -1167,25 +1191,26 @@ int mp_register_gsi(u32 gsi, int trigger
int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
u32 gsi, int triggering, int polarity)
{
- struct mpc_config_intsrc intsrc;
+#ifdef CONFIG_X86_MPPARSE
+ struct mp_config_intsrc mp_irq;
int ioapic;

- if (!enable_update_mptable)
+ if (!acpi_ioapic)
return 0;

/* 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) |
+ mp_irq.mp_type = MP_INTSRC;
+ mp_irq.mp_irqtype = mp_INT;
+ mp_irq.mp_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);
+ mp_irq.mp_srcbus = number;
+ mp_irq.mp_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);
+ mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
+ mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;

+ save_mp_irq(&mp_irq);
+#endif
return 0;
}

Index: linux-2.6/arch/x86/kernel/mpparse.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/mpparse.c
+++ linux-2.6/arch/x86/kernel/mpparse.c
@@ -34,8 +34,6 @@
#include <mach_mpparse.h>
#endif

-int enable_update_mptable;
-
/*
* Checksum an MP configuration block.
*/
@@ -246,7 +244,7 @@ static void __init print_mp_irq_info(str
mp_irq->mp_srcbusirq, mp_irq->mp_dstapic, mp_irq->mp_dstirq);
}

-static void assign_to_mp_irq(struct mpc_config_intsrc *m,
+static void __init assign_to_mp_irq(struct mpc_config_intsrc *m,
struct mp_config_intsrc *mp_irq)
{
mp_irq->mp_dstapic = m->mpc_dstapic;
@@ -270,7 +268,7 @@ static void __init assign_to_mpc_intsrc(
m->mpc_dstirq = mp_irq->mp_dstirq;
}

-static int mp_irq_mpc_intsrc_cmp(struct mp_config_intsrc *mp_irq,
+static int __init mp_irq_mpc_intsrc_cmp(struct mp_config_intsrc *mp_irq,
struct mpc_config_intsrc *m)
{
if (mp_irq->mp_dstapic != m->mpc_dstapic)
@@ -291,17 +289,16 @@ static int mp_irq_mpc_intsrc_cmp(struct
return 0;
}

-void MP_intsrc_info(struct mpc_config_intsrc *m)
+static void __init MP_intsrc_info(struct mpc_config_intsrc *m)
{
int i;

print_MP_intsrc_info(m);

- if (enable_update_mptable)
- for (i = 0; i < mp_irq_entries; i++) {
- if (!mp_irq_mpc_intsrc_cmp(&mp_irqs[i], m))
- return;
- }
+ for (i = 0; i < mp_irq_entries; i++) {
+ if (!mp_irq_mpc_intsrc_cmp(&mp_irqs[i], m))
+ return;
+ }

assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
if (++mp_irq_entries == MAX_IRQ_SOURCES)
@@ -1113,6 +1110,8 @@ out:
return 0;
}

+static int __initdata enable_update_mptable;
+
static int __init update_mptable_setup(char *str)
{
enable_update_mptable = 1;
Index: linux-2.6/include/asm-x86/mpspec.h
===================================================================
--- linux-2.6.orig/include/asm-x86/mpspec.h
+++ linux-2.6/include/asm-x86/mpspec.h
@@ -59,9 +59,7 @@ extern void mp_override_legacy_irq(u8 bu
u32 gsi);
extern void mp_config_acpi_legacy_irqs(void);
extern int mp_register_gsi(u32 gsi, int edge_level, int active_high_low);
-extern void MP_intsrc_info(struct mpc_config_intsrc *m);
#ifdef CONFIG_X86_IO_APIC
-extern int enable_update_mptable;
extern int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
u32 gsi, int triggering, int polarity);
#else

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