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x86/PCI: Disable E820 reserved region clipping via quirks

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To avoid unusable space that some firmware includes in PCI host bridge
_CRS, Linux currently excludes E820 reserved regions from _CRS windows; see
4dc2287c18 ("x86: avoid E820 regions when allocating address space").

However, some systems supply E820 reserved regions that cover the entire
memory window from _CRS, so clipping them out leaves no space for hot-added
or uninitialized PCI devices.

For example, from a Lenovo IdeaPad 3 15IIL 81WE:

  BIOS-e820: [mem 0x4bc50000-0xcfffffff] reserved
  pci_bus 0000:00: root bus resource [mem 0x65400000-0xbfffffff window]
  pci 0000:00:15.0: BAR 0: [mem 0x00000000-0x00000fff 64bit]
  pci 0000:00:15.0: BAR 0: no space for [mem size 0x00001000 64bit]

Add quirks to disable the E820 clipping for machines known to do this.

A single DMI_PRODUCT_VERSION "IIL" quirk matches all the below:

  Lenovo IdeaPad 3 14IIL05
  Lenovo IdeaPad 3 15IIL05
  Lenovo IdeaPad 3 17IIL05
  Lenovo IdeaPad 5 14IIL05
  Lenovo IdeaPad 5 15IIL05
  Lenovo IdeaPad Slim 7 14IIL05
  Lenovo IdeaPad Slim 7 15IIL05
  Lenovo IdeaPad S145-15IIL
  Lenovo IdeaPad S340-14IIL
  Lenovo IdeaPad S340-15IIL
  Lenovo IdeaPad C340-15IIL
  Lenovo BS145-15IIL
  Lenovo V14-IIL
  Lenovo V15-IIL
  Lenovo V17-IIL
  Lenovo Yoga C940-14IIL
  Lenovo Yoga S740-14IIL
  Lenovo Yoga Slim 7 14IIL05
  Lenovo Yoga Slim 7 15IIL05

in addition to the following that don't actually need it because they have
no E820 reserved regions that overlap _CRS windows:

  Lenovo IdeaPad Flex 5 14IIL05
  Lenovo IdeaPad Flex 5 15IIL05
  Lenovo ThinkBook 14-IIL
  Lenovo ThinkBook 15-IIL
  Lenovo Yoga S940-14IIL

Other quirks match these:

  Acer Spin 5 (SP513-54N)

  Clevo X170KM-G Barebone

Link: https://bugzilla.kernel.org/show_bug.cgi?id=206459 Lenovo Yoga C940-14IIL
Link: https://bugzilla.kernel.org/show_bug.cgi?id=214259 Clevo X170KM Barebone
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1868899 Lenovo IdeaPad 3 15IIL05
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1871793 Lenovo IdeaPad 5 14IIL05
Link: https://bugs.launchpad.net/bugs/1878279 Lenovo IdeaPad 5 14IIL05
Link: https://bugs.launchpad.net/bugs/1880172 Lenovo IdeaPad 3 14IIL05
Link: https://bugs.launchpad.net/bugs/1884232 Acer Spin SP513-54N
Link: https://bugs.launchpad.net/bugs/1921649 Lenovo IdeaPad S145
Link: https://bugs.launchpad.net/bugs/1931715 Lenovo IdeaPad S145
Link: https://bugs.launchpad.net/bugs/1932069 Lenovo BS145-15IIL
Link: https://lore.kernel.org/r/20220519152150.6135-3-hdegoede@redhat.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Benoit Grégoire <benoitg@coeus.ca>
Cc: Hui Wang <hui.wang@canonical.com>
This commit is contained in:
Hans de Goede 2022-05-19 17:21:49 +02:00 committed by Bjorn Helgaas
parent fa6dae5d82
commit d341838d77
1 changed files with 53 additions and 0 deletions
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53
arch/x86/pci/acpi.c
View File

@ -43,6 +43,14 @@ static int __init set_ignore_seg(const struct dmi_system_id *id)
return 0;
}
static int __init set_no_e820(const struct dmi_system_id *id)
{
printk(KERN_INFO "PCI: %s detected: not clipping E820 regions from _CRS\n",
id->ident);
pci_use_e820 = false;
return 0;
}
static const struct dmi_system_id pci_crs_quirks[] __initconst = {
/* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
{
@ -137,6 +145,51 @@ static const struct dmi_system_id pci_crs_quirks[] __initconst = {
DMI_MATCH(DMI_PRODUCT_NAME, "HP xw9300 Workstation"),
},
},
/*
* Many Lenovo models with "IIL" in their DMI_PRODUCT_VERSION have
* an E820 reserved region that covers the entire 32-bit host
* bridge memory window from _CRS. Using the E820 region to clip
* _CRS means no space is available for hot-added or uninitialized
* PCI devices. This typically breaks I2C controllers for touchpads
* and hot-added Thunderbolt devices. See the commit log for
* models known to require this quirk and related bug reports.
*/
{
.callback = set_no_e820,
.ident = "Lenovo *IIL* product version",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "IIL"),
},
},
/*
* The Acer Spin 5 (SP513-54N) has the same E820 reservation covering
* the entire _CRS 32-bit window issue as the Lenovo *IIL* models.
* See https://bugs.launchpad.net/bugs/1884232
*/
{
.callback = set_no_e820,
.ident = "Acer Spin 5 (SP513-54N)",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Spin SP513-54N"),
},
},
/*
* Clevo X170KM-G barebones have the same E820 reservation covering
* the entire _CRS 32-bit window issue as the Lenovo *IIL* models.
* See https://bugzilla.kernel.org/show_bug.cgi?id=214259
*/
{
.callback = set_no_e820,
.ident = "Clevo X170KM-G Barebone",
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "X170KM-G"),
},
},
{}
};