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The SCI handler for the GPE associated with the Super I/O did not clear
the respective PME status bits resulting in the SCI reoccurring
endlessly. The /proc/interrupts reported millions of ACPI interrupts
generated in just a few minutes of uptime. The flood of interrupts
caused some units to be unusable in extreme cases once attempted to
boot Qubes OS for example. On systems like Qubes OS it had a huge
impact on performance due to many IPCs the SCIs caused under Xen.
Clear the PME bits of devices that report a PME event. Then clear
the global PME status bit at the end of SCI handler to prevent the SCI
from asserting again until a new event occurrs. With this change
the number of ACPI interrupts generated in the first minutes of uptime
settles at a few thousands.
TEST=Boot Qubes OS R4.1.2 on Dell OptiPlex 9010 SFF and check
/proc/interrupts in dom0 if the number of ACPI interrupts is only
a few thousands.
Change-Id: I64e03d268138a62b46084be41343ef7fb089dfc3
Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78351
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Krystian Hebel <krystian.hebel@3mdeb.com>
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Due to copy-paste error, the UART2 device name is the same as
UART1. Fix it.
Change-Id: I796d09f321101a36731a56099af738c9485df8a2
Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78350
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Krystian Hebel <krystian.hebel@3mdeb.com>
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Change-Id: I449ec5b0bbf3f24d51688efef151d3018d2848b2
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71524
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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Change-Id: I5c77b6d1e1dc1134f62dcb3e93df01dc9c2f386c
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71520
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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The `_PRS` ACPI object is not needed for static (non-configurable)
devices. For devices where `_CRS` always provides the same set of
resource settings, drop the `_PRS` object. Note that every dropped
`_PRS` object only provides one set of resource settings, which is
identical to the resource settings provided by the `_CRS` object.
In addition, drop `IGNORE_IASL_MISSING_DEPENDENCY` from the only
mainboard using the SCH5545 code, `dell/snb_ivb_workstations`.
Change-Id: Ic462bd3dfa287744d4f733561de81c09c1c397e6
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63522
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
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The SMSC SCH5545 is very similar to the publicly available
datasheet for the SCH5627.
TEST=use PS2 keyboard and mouse, serial port, runtime registers and
Embedded Memory Interface on Dell Optiplex 9010
Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: If8a60d5802675f09b08014ed583d2d8afa29fc04
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40350
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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