From: Shannon Zhao <zhaoshenglong@huawei.com>
To: Alexander Graf <agraf@suse.de>, <qemu-devel@nongnu.org>
Cc: mst@redhat.com, qemu-arm@nongnu.org,
Laszlo Ersek <lersek@redhat.com>,
Shannon Zhao <shannon.zhao@linaro.org>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>
Subject: Re: [Qemu-arm] [Qemu-devel] [PATCH v2 2/4] hw/arm/virt: Declare virtio-mmio as dma cache coherent in ACPI
Date: Fri, 10 Feb 2017 10:49:20 +0800 [thread overview]
Message-ID: <589D2A30.5030804@huawei.com> (raw)
In-Reply-To: <1486644810-33181-3-git-send-email-agraf@suse.de>
On 2017/2/9 20:53, Alexander Graf wrote:
> Virtio-mmio devices can directly access guest memory and do so in cache
> coherent fashion. Tell the guest about that fact when it's using ACPI.
>
> Signed-off-by: Alexander Graf <agraf@suse.de>
> ---
> hw/arm/virt-acpi-build.c | 1 +
> 1 file changed, 1 insertion(+)
>
Reviewed-by: Shannon Zhao <shannon.zhao@linaro.org>
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index 07a10ac..8955a9d 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -135,6 +135,7 @@ static void acpi_dsdt_add_virtio(Aml *scope,
> Aml *dev = aml_device("VR%02u", i);
> aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005")));
> aml_append(dev, aml_name_decl("_UID", aml_int(i)));
> + aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
>
> Aml *crs = aml_resource_template();
> aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE));
>
--
Shannon
next prev parent reply other threads:[~2017-02-10 2:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-09 12:53 [Qemu-arm] [PATCH v2 0/4] target-arm: Add some omitted dma cache coherency flags Alexander Graf
2017-02-09 12:53 ` [Qemu-arm] [PATCH v2 1/4] target-arm: Declare virtio-mmio as dma-coherent in dt Alexander Graf
2017-02-09 12:53 ` [Qemu-arm] [PATCH v2 2/4] hw/arm/virt: Declare virtio-mmio as dma cache coherent in ACPI Alexander Graf
2017-02-10 2:49 ` Shannon Zhao [this message]
2017-02-09 12:53 ` [Qemu-arm] [PATCH v2 3/4] hw/arm/virt: Declare fwcfg " Alexander Graf
2017-02-10 2:49 ` [Qemu-arm] [Qemu-devel] " Shannon Zhao
2017-02-09 12:53 ` [Qemu-arm] [PATCH v2 4/4] hw/arm/virt: Declare fwcfg as dma cache coherent in dt Alexander Graf
2017-02-09 13:15 ` [Qemu-arm] [PATCH v2 0/4] target-arm: Add some omitted dma cache coherency flags Laszlo Ersek
2017-02-09 18:13 ` Michael S. Tsirkin
2017-02-09 18:27 ` Alexander Graf
2017-02-09 20:28 ` Laszlo Ersek
2017-02-09 17:51 ` [Qemu-devel] " Ard Biesheuvel
2017-02-10 15:02 ` [Qemu-arm] " Peter Maydell
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