On Tue, Mar 1, 2022 at 8:34 PM Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote: > > On Thu, Feb 24, 2022 at 9:41 AM Hans de Goede <hdegoede@xxxxxxxxxx> wrote: > > > > Hi Mark, > > > > On 2/23/22 17:07, Mark Cilissen wrote: > > > On this board the ACPI RSDP structure points to both a RSDT and an XSDT, > > > but the XSDT points to a truncated FADT. This causes all sorts of trouble > > > and usually a complete failure to boot after the following error occurs: > > > > > > ACPI Error: Unsupported address space: 0x20 (*/hwregs-*) > > > ACPI Error: AE_SUPPORT, Unable to initialize fixed events (*/evevent-*) > > > ACPI: Unable to start ACPI Interpreter > > > > > > This leaves the ACPI implementation in such a broken state that subsequent > > > kernel subsystem initialisations go wrong, resulting in among others > > > mismapped PCI memory, SATA and USB enumeration failures, and freezes. > > > > > > As this is an older embedded platform that will likely never see any BIOS > > > updates to address this issue and its default shipping OS only complies to > > > ACPI 1.0, work around this by forcing `acpi=rsdt`. This patch, applied on > > > top of Linux 5.10.102, was confirmed on real hardware to fix the issue. > > > > > > Signed-off-by: Mark Cilissen <mark@xxxxxxxxxx> > > > Cc: stable@xxxxxxxxxxxxxxx > > > > Wow, you got it working, cool! > > > > The patch looks good to me: > > > > Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx> > > Applied as 5.18 material, thanks! And dropped due to a problem introduced by it. Also please note that the x86 mailing list address originally used in the CC list was incorrect.
