Nick Meier reported a regression with HyperV that "
After rebooting the VM, the following messages are logged in syslog
when trying to load the tulip driver:
tulip: Linux Tulip drivers version 1.1.15 (Feb 27, 2007)
tulip: 0000:00:0a.0: PCI INT A: failed to register GSI
tulip: Cannot enable tulip board #0, aborting
tulip: probe of 0000:00:0a.0 failed with error -16
Errors occur in 3.19.0 kernel
Works in 3.17 kernel.
"
According to the ACPI dump file posted by Nick at
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1440072
The ACPI MADT table includes an interrupt source overridden entry for
ACPI SCI:
[236h 0566 1] Subtable Type : 02 <Interrupt Source Override>
[237h 0567 1] Length : 0A
[238h 0568 1] Bus : 00
[239h 0569 1] Source : 09
[23Ah 0570 4] Interrupt : 00000009
[23Eh 0574 2] Flags (decoded below) : 000D
Polarity : 1
Trigger Mode : 3
That means ACPI SCI interrupt(Interrupt : 00000009) works in
level(Trigger Mode : 3), high(Polarity : 1) mode.
And in DSDT table, we have _PRT method to define PCI interrupts, which
eventually goes to:
Name (PRSA, ResourceTemplate ()
{
IRQ (Level, ActiveLow, Shared, )
{3,4,5,7,9,10,11,12,14,15}
})
Name (PRSB, ResourceTemplate ()
{
IRQ (Level, ActiveLow, Shared, )
{3,4,5,7,9,10,11,12,14,15}
})
Name (PRSC, ResourceTemplate ()
{
IRQ (Level, ActiveLow, Shared, )
{3,4,5,7,9,10,11,12,14,15}
})
Name (PRSD, ResourceTemplate ()
{
IRQ (Level, ActiveLow, Shared, )
{3,4,5,7,9,10,11,12,14,15}
})
which means it's also possible to use IRQ9 for PCI interrupt, but works
in Level, ActiveLow mode. So it conflicts with ACPI SCI interrupt source
overriddern.
So implement a quirk to correct interrupt attribute for HyperV SCI
interrupt. Nick reports the proposed patch fixes the regression as "
Applied the above proposed patch with the DMI values substituted.
The tulip driver loaded, and an address was assigned via DHCP.
"
Please refer to following links for more information:
https://bugzilla.kernel.org/show_bug.cgi?id=101301
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1440072
Fixes: cd68f6bd53cf ("x86, irq, acpi: Get rid of special handling of GSI for ACPI SCI")
Reported-and-tested-by: Nick Meier <nmeier@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # 3.19
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
---
arch/x86/kernel/acpi/boot.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index e49ee24da85e..47d95a86d56d 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1308,6 +1308,13 @@ static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
return 0;
}
+static int __init acpi_force_hyperv_sci_attr(const struct dmi_system_id *d)
+{
+ acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
+ (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
+ return 0;
+}
+
/*
* ACPI offers an alternative platform interface model that removes
* ACPI hardware requirements for platforms that do not implement
@@ -1458,6 +1465,14 @@ static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
},
},
+ {
+ .callback = acpi_force_hyperv_sci_attr,
+ .ident = "HyperV",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"),
+ },
+ },
{}
};
--
1.7.10.4
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
