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[Qemu-arm] [PATCH v2 3/4] hw/arm/virt: Declare fwcfg as dma cache cohere
From: |
Alexander Graf |
Subject: |
[Qemu-arm] [PATCH v2 3/4] hw/arm/virt: Declare fwcfg as dma cache coherent in ACPI |
Date: |
Thu, 9 Feb 2017 13:53:29 +0100 |
Fw-cfg recently learned how to directly access guest memory and does so in
cache coherent fashion. Tell the guest about that fact when it's using ACPI.
Signed-off-by: Alexander Graf <address@hidden>
---
hw/arm/virt-acpi-build.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 8955a9d..0835e59 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -90,6 +90,7 @@ static void acpi_dsdt_add_fw_cfg(Aml *scope, const
MemMapEntry *fw_cfg_memmap)
aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
/* device present, functioning, decoding, not shown in UI */
aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
+ aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
Aml *crs = aml_resource_template();
aml_append(crs, aml_memory32_fixed(fw_cfg_memmap->base,
--
2.10.0