From: "Michael S. Tsirkin" <mst@redhat.com>
To: Zha Bin <zhabin@linux.alibaba.com>
Cc: linux-kernel@vger.kernel.org, jasowang@redhat.com,
slp@redhat.com, virtio-dev@lists.oasis-open.org,
qemu-devel@nongnu.org, gerry@linux.alibaba.com,
jing2.liu@linux.intel.com, chao.p.peng@linux.intel.com
Subject: Re: [PATCH v2 5/5] x86: virtio-mmio: support virtio-mmio with MSI for x86
Date: Tue, 11 Feb 2020 06:14:43 -0500 [thread overview]
Message-ID: <20200211061148-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <946b71e77a34666a9b8c419c5a467d1628b50fa0.1581305609.git.zhabin@linux.alibaba.com>
On Mon, Feb 10, 2020 at 05:05:21PM +0800, Zha Bin wrote:
> From: Liu Jiang <gerry@linux.alibaba.com>
>
> virtio-mmio supports a generic MSI irq domain for all archs. This
> patch adds the x86 architecture support.
>
> Signed-off-by: Liu Jiang <gerry@linux.alibaba.com>
> Co-developed-by: Zha Bin <zhabin@linux.alibaba.com>
> Signed-off-by: Zha Bin <zhabin@linux.alibaba.com>
> Co-developed-by: Jing Liu <jing2.liu@linux.intel.com>
> Signed-off-by: Jing Liu <jing2.liu@linux.intel.com>
> Co-developed-by: Chao Peng <chao.p.peng@linux.intel.com>
> Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
> ---
> arch/x86/kernel/apic/msi.c | 11 ++++++++++-
Patches like this need to CC x86 maintainers.
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
> index 159bd0c..2fcd602 100644
> --- a/arch/x86/kernel/apic/msi.c
> +++ b/arch/x86/kernel/apic/msi.c
> @@ -45,7 +45,11 @@ static void __irq_msi_compose_msg(struct irq_cfg *cfg, struct msi_msg *msg)
> MSI_DATA_VECTOR(cfg->vector);
> }
>
> -static void irq_msi_compose_msg(struct irq_data *data, struct msi_msg *msg)
> +/*
> + * x86 PCI-MSI/HPET/DMAR related method.
> + * Also can be used as arch specific method for virtio-mmio MSI.
> + */
> +void irq_msi_compose_msg(struct irq_data *data, struct msi_msg *msg)
> {
> __irq_msi_compose_msg(irqd_cfg(data), msg);
> }
> @@ -166,6 +170,11 @@ static void irq_msi_update_msg(struct irq_data *irqd, struct irq_cfg *cfg)
> return ret;
> }
>
> +struct irq_domain *arch_msi_root_irq_domain(void)
> +{
> + return x86_vector_domain;
> +}
> +
> /*
> * IRQ Chip for MSI PCI/PCI-X/PCI-Express Devices,
> * which implement the MSI or MSI-X Capability Structure.
So there's a new non-static functions with no callers here,
and a previously static irq_msi_compose_msg is not longer
static. No callers so how does this help anyone?
And how does this achieve the goal of enabling virtio mmio?
> --
> 1.8.3.1
next prev parent reply other threads:[~2020-02-11 11:14 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-10 9:05 [PATCH v2 0/5] virtio mmio specification enhancement Zha Bin
2020-02-10 9:05 ` [PATCH v2 1/5] virtio-mmio: add notify feature for per-queue Zha Bin
2020-02-11 10:50 ` Michael S. Tsirkin
2020-02-11 11:33 ` Michael S. Tsirkin
2020-02-12 3:39 ` Jason Wang
2020-02-12 8:18 ` Michael S. Tsirkin
2020-02-12 8:53 ` Jason Wang
2020-02-12 9:33 ` Jason Wang
2020-02-12 9:55 ` Michael S. Tsirkin
2020-02-13 3:38 ` Jason Wang
2020-02-10 9:05 ` [PATCH v2 2/5] virtio-mmio: refactor common functionality Zha Bin
2020-02-11 11:19 ` Michael S. Tsirkin
2020-02-12 2:58 ` [virtio-dev] " Liu, Jing2
2020-02-12 7:29 ` Michael S. Tsirkin
2020-02-10 9:05 ` [PATCH v2 3/5] virtio-mmio: create a generic MSI irq domain Zha Bin
2020-02-11 11:16 ` Michael S. Tsirkin
2020-02-12 7:40 ` Michael S. Tsirkin
2020-02-10 9:05 ` [PATCH v2 4/5] virtio-mmio: add MSI interrupt feature support Zha Bin
2020-02-11 3:17 ` Jason Wang
2020-02-11 3:35 ` [virtio-dev] " Liu, Jing2
2020-02-11 4:02 ` Jason Wang
[not found] ` <5522f205-207b-b012-6631-3cc77dde3bfe@linux.intel.com>
2020-02-11 7:40 ` Jason Wang
2020-02-11 11:58 ` Michael S. Tsirkin
2020-02-11 12:04 ` Jason Wang
2020-02-11 12:08 ` Michael S. Tsirkin
2020-02-11 12:18 ` Jason Wang
2020-02-11 14:00 ` Michael S. Tsirkin
2020-02-12 9:03 ` Jason Wang
2020-02-12 9:15 ` Michael S. Tsirkin
[not found] ` <4c19292f-9d25-a859-3dde-6dd5a03fdf0b@linux.intel.com>
2020-02-12 7:33 ` Michael S. Tsirkin
2020-02-12 9:06 ` Jason Wang
2020-02-12 9:16 ` Michael S. Tsirkin
2020-02-13 3:40 ` Jason Wang
2020-02-11 11:21 ` Michael S. Tsirkin
2020-02-11 11:11 ` Michael S. Tsirkin
2020-02-10 9:05 ` [PATCH v2 5/5] x86: virtio-mmio: support virtio-mmio with MSI for x86 Zha Bin
2020-02-11 11:14 ` Michael S. Tsirkin [this message]
2020-02-10 11:44 ` [PATCH v2 0/5] virtio mmio specification enhancement Michael S. Tsirkin
2020-02-11 16:05 ` Chao Peng
2020-02-11 10:57 ` Michael S. Tsirkin
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