[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Qemu-devel] [PATCH v2] hw/arm/virt-acpi - reserve ECAM space as PNP0C02

From: Ard Biesheuvel
Subject: [Qemu-devel] [PATCH v2] hw/arm/virt-acpi - reserve ECAM space as PNP0C02 device
Date: Fri, 13 Jan 2017 17:32:18 +0000

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 table generation routine to add this reservation.

Signed-off-by: Ard Biesheuvel <address@hidden>
 hw/arm/virt-acpi-build.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 085a61117378..50d52f685f68 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -310,6 +310,13 @@ static void acpi_dsdt_add_pci(Aml *scope, const 
MemMapEntry *memmap,
     Aml *dev_rp0 = aml_device("%s", "RP0");
     aml_append(dev_rp0, aml_name_decl("_ADR", aml_int(0)));
     aml_append(dev, dev_rp0);
+    Aml *dev_res0 = aml_device("%s", "RES0");
+    aml_append(dev_res0, aml_name_decl("_HID", aml_string("PNP0C02")));
+    crs = aml_resource_template();
+    aml_append(crs, aml_memory32_fixed(base_ecam, size_ecam, AML_READ_WRITE));
+    aml_append(dev_res0, aml_name_decl("_CRS", crs));
+    aml_append(dev, dev_res0);
     aml_append(scope, dev);

reply via email to

[Prev in Thread] Current Thread [Next in Thread]