From 3b5c492b1c728f90b17520be74c4d74c9797c55c Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Fri, 10 Feb 2017 17:40:29 +0000 Subject: [PATCH] hw/arm/virt: Declare fwcfg as dma cache coherent in ACPI 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 Reviewed-by: Laszlo Ersek Reviewed-by: Ard Biesheuvel Reviewed-by: Shannon Zhao Message-id: 1486644810-33181-4-git-send-email-agraf@suse.de Signed-off-by: Peter Maydell --- 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 8955a9d384..0835e59bb2 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,