diff options
| author | Patrick Rudolph <patrick.rudolph@9elements.com> | 2019-12-13 12:16:06 +0100 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2020-01-09 14:22:51 +0000 |
| commit | c83bab62b3657d97299c8368b6c610e4cbf994b6 (patch) | |
| tree | f568d7f66b4a3491c6292040db29905111771de4 /src/drivers | |
| parent | 5c8ff794a8dcb0760c137d3b2dff1879a4a8dad6 (diff) | |
acpi: Be more ACPI compliant when generating _UID
* Add function to generate unique _UID using CRC32
* Add function to write the _UID based on a device's ACPI path
ACPI devices that have the same _HID must use different _UID.
Linux doesn't care about _UID if it's not used.
Windows 10 verifies the ACPI code on boot and BSODs if two devices
with the same _HID share the same _UID.
Fixes BSOD seen on Windows 10.
Change-Id: I47cd5396060d325f9ce338afced6af021e7ff2b4
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37695
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/crb/tis.c | 2 | ||||
| -rw-r--r-- | src/drivers/net/r8168.c | 3 | ||||
| -rw-r--r-- | src/drivers/pc80/tpm/tis.c | 2 | ||||
| -rw-r--r-- | src/drivers/wifi/generic.c | 3 |
4 files changed, 6 insertions, 4 deletions
diff --git a/src/drivers/crb/tis.c b/src/drivers/crb/tis.c index f2aba48297..b1fbad01eb 100644 --- a/src/drivers/crb/tis.c +++ b/src/drivers/crb/tis.c @@ -117,7 +117,7 @@ static void crb_tpm_fill_ssdt(struct device *dev) acpigen_write_name_string("_HID", "MSFT0101"); acpigen_write_name_string("_CID", "MSFT0101"); - acpigen_write_name_integer("_UID", 1); + acpi_device_write_uid(dev); acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON); diff --git a/src/drivers/net/r8168.c b/src/drivers/net/r8168.c index bc0132fc13..1bca8799aa 100644 --- a/src/drivers/net/r8168.c +++ b/src/drivers/net/r8168.c @@ -312,7 +312,8 @@ static void r8168_net_fill_ssdt(struct device *dev) acpigen_write_scope(path); acpigen_write_device(acpi_device_name(dev)); acpigen_write_name_string("_HID", R8168_ACPI_HID); - acpigen_write_name_integer("_UID", 0); + acpi_device_write_uid(dev); + if (dev->chip_ops) acpigen_write_name_string("_DDN", dev->chip_ops->name); diff --git a/src/drivers/pc80/tpm/tis.c b/src/drivers/pc80/tpm/tis.c index e9f14854c4..a35ef83d2c 100644 --- a/src/drivers/pc80/tpm/tis.c +++ b/src/drivers/pc80/tpm/tis.c @@ -902,7 +902,7 @@ static void lpc_tpm_fill_ssdt(struct device *dev) acpigen_write_name("_CID"); acpigen_emit_eisaid("PNP0C31"); - acpigen_write_name_integer("_UID", 1); + acpi_device_write_uid(dev); u32 did_vid = tpm_read_did_vid(0); if (did_vid > 0 && did_vid < 0xffffffff) diff --git a/src/drivers/wifi/generic.c b/src/drivers/wifi/generic.c index 9f9f4faae7..fe2e39d29d 100644 --- a/src/drivers/wifi/generic.c +++ b/src/drivers/wifi/generic.c @@ -187,7 +187,8 @@ void generic_wifi_fill_ssdt(struct device *dev, /* Device */ acpigen_write_scope(path); acpigen_write_device(acpi_device_name(dev)); - acpigen_write_name_integer("_UID", 0); + acpi_device_write_uid(dev); + if (dev->chip_ops) acpigen_write_name_string("_DDN", dev->chip_ops->name); |