commit 49812d42fe9af04f7d5e8edbc50b53bc5ceebec3
author Ard Biesheuvel <ard.biesheuvel@linaro.org> Fri Jan 13 17:34:16 2017 +0000
committer Ard Biesheuvel <ard.biesheuvel@linaro.org> Thu Jan 26 19:45:23 2017 +0000
tree 24aaf3a81689305629fbb585214319da3d960008
parent cec1666e541501fb486d2f3fd22f7f6cdcb959f1

Platforms/AMD/Styx: reserve ECAM config space in PNP0C02 device

Linux for arm64 v4.10 and later will complain if the ECAM config space is
not reserved in the ACPI namespace:

  acpi PNP0A08:00: [Firmware Bug]: ECAM area [mem 0x3f000000-0x3fffffff]
                                   not reserved in ACPI namespace

The rationale is that OSes that don't consume the MCFG table should still
be able to infer that the PCI config space MMIO region is occupied.

So update the ACPI tables to add this reservation.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Graeme Gregory <graeme.gregory@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>

Platforms/AMD/Styx/AcpiTables/Dsdt.asl

diff --git a/Platforms/AMD/Styx/AcpiTables/Dsdt.asl b/Platforms/AMD/Styx/AcpiTables/Dsdt.asl
index 7edec3d..3bfa26a 100644
--- a/Platforms/AMD/Styx/AcpiTables/Dsdt.asl
+++ b/Platforms/AMD/Styx/AcpiTables/Dsdt.asl
@@ -646,6 +646,14 @@
                 Return (RBUF) /* \_SB_.PCI0._CRS.RBUF */

             } // Method(_CRS)

 

+            Device (RES0)

+            {

+                Name (_HID, "PNP0C02")

+                Name (_CRS, ResourceTemplate ()

+                {

+                    Memory32Fixed (ReadWrite, 0xF0000000, 0x8000000)

+                })

+            }

             Name (SUPP, 0x00)

             Name (CTRL, 0x00)

             Method (_OSC, 4, NotSerialized)  // _OSC: Operating System Capabilities