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x86 quirk: Fix polarity for IRQ0 pin2 override on SB800 systems

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commit 7f74f8f28a upstream.

On some SB800 systems polarity for IOAPIC pin2 is wrongly
specified as low active by BIOS. This caused system hangs after
resume from S3 when HPET was used in one-shot mode on such
systems because a timer interrupt was missed (HPET signal is
high active).

For more details see:

  http://marc.info/?l=linux-kernel&m=129623757413868

Tested-by: Manoj Iyer <manoj.iyer@canonical.com>
Tested-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <20110224145346.GD3658@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Andreas Herrmann
2011-02-24 15:53:46 +01:00
committed by Greg Kroah-Hartman
parent 62ead775d1
commit 470d1c9b41
3 changed files with 18 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
arch/x86/include/asm/acpi.h
View File

@@ -89,6 +89,7 @@ extern int acpi_ht;
extern int acpi_pci_disabled;
extern int acpi_skip_timer_override;
extern int acpi_use_timer_override;
extern int acpi_fix_pin2_polarity;
extern u8 acpi_sci_flags;
extern int acpi_sci_override_gsi;

14
arch/x86/kernel/acpi/boot.c
View File

@@ -70,6 +70,7 @@ u8 acpi_sci_flags __initdata;
int acpi_sci_override_gsi __initdata;
int acpi_skip_timer_override __initdata;
int acpi_use_timer_override __initdata;
int acpi_fix_pin2_polarity __initdata;
#ifdef CONFIG_X86_LOCAL_APIC
static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
@@ -360,10 +361,15 @@ acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
return 0;
}
if (acpi_skip_timer_override &&
intsrc->source_irq == 0 && intsrc->global_irq == 2) {
printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
return 0;
if (intsrc->source_irq == 0 && intsrc->global_irq == 2) {
if (acpi_skip_timer_override) {
printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
return 0;
}
if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
}
}
mp_override_legacy_irq(intsrc->source_irq,

16
arch/x86/kernel/early-quirks.c
View File

@@ -145,15 +145,10 @@ static void __init ati_bugs(int num, int slot, int func)
static u32 __init ati_sbx00_rev(int num, int slot, int func)
{
u32 old, d;
u32 d;
d = read_pci_config(num, slot, func, 0x70);
old = d;
d &= ~(1<<8);
write_pci_config(num, slot, func, 0x70, d);
d = read_pci_config(num, slot, func, 0x8);
d &= 0xff;
write_pci_config(num, slot, func, 0x70, old);
return d;
}
@@ -162,11 +157,14 @@ static void __init ati_bugs_contd(int num, int slot, int func)
{
u32 d, rev;
if (acpi_use_timer_override)
rev = ati_sbx00_rev(num, slot, func);
if (rev >= 0x40)
acpi_fix_pin2_polarity = 1;
if (rev > 0x13)
return;
rev = ati_sbx00_rev(num, slot, func);
if (rev > 0x13)
if (acpi_use_timer_override)
return;
/* check for IRQ0 interrupt swap */