From: Jonathan Cameron via <qemu-devel@nongnu.org>
To: wangyuquan <wangyuquan1236@phytium.com.cn>
Cc: <fan.ni@samsung.com>, <mst@redhat.com>,
<marcel.apfelbaum@gmail.com>, <rad@semihalf.com>,
<peter.maydell@linaro.org>, <leif.lindholm@oss.qualcomm.com>,
<graf@amazon.com>, <claudio.fontana@huawei.com>,
<philmd@linaro.org>, <richard.henderson@linaro.org>,
<chenbaozi@phytium.com.cn>, <qemu-devel@nongnu.org>,
<linux-cxl@vger.kernel.org>
Subject: Re: [RFC QEMU PATCH v4 2/2] pci-host/cxl: Support creation of a new CXL Host Bridge
Date: Wed, 17 Sep 2025 17:37:42 +0100 [thread overview]
Message-ID: <20250917173742.000078cc@huawei.com> (raw)
In-Reply-To: <20250807105910.240070-3-wangyuquan1236@phytium.com.cn>
On Thu, 7 Aug 2025 18:59:10 +0800
wangyuquan <wangyuquan1236@phytium.com.cn> wrote:
> From: Yuquan Wang <wangyuquan1236@phytium.com.cn>
>
> Define a new CXL host bridge type (TYPE_CXL_HOST). This is an
> independent CXL host bridge which combined GPEX features (ECAM, MMIO
> windows and irq) and CXL Host Bridge Component Registers (CHBCR).
>
> The root bus path of CXL_HOST is "0001:00", that would not affect the
> original PCIe host topology on some platforms. In the previous, the
> pxb-cxl-host with any CXL root ports and CXL endpoint devices would
> share the resources (like BDF, MMIO space) of the original pcie
> domain, but it would cause some platforms like sbsa-ref are unable to
> support the original number of PCIe devices. The new type provides a
> solution to resolve the problem.
>
> Signed-off-by: Yuquan Wang <wangyuquan1236@phytium.com.cn>
Likewise, this looks fine to me. If the SBSA maintainers
are happy with the approach and PCI folk think the more generic parts
look fine then would be good to move this forwards.
Acked-by: Jonathan Cameron <jonathan.cameron@huawei.com>
next prev parent reply other threads:[~2025-09-17 16:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-07 10:59 [RFC QEMU PATCH v4 0/2] cxl: Support creation of a new CXL Host Bridge wangyuquan
2025-08-07 10:59 ` [RFC QEMU PATCH v4 1/2] hw/pxb-cxl: Rename the pxb cxl host bridge wangyuquan
2025-09-17 16:32 ` Jonathan Cameron via
2025-08-07 10:59 ` [RFC QEMU PATCH v4 2/2] pci-host/cxl: Support creation of a new CXL Host Bridge wangyuquan
2025-09-17 16:37 ` Jonathan Cameron via [this message]
2025-09-18 2:59 ` Yuquan Wang
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