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Tsirkin" To: Thierry Escande Cc: qemu-devel@nongnu.org, Paolo Bonzini , Richard Henderson , Eduardo Habkost , Anthony PERARD , xen-devel@lists.xenproject.org Subject: Re: [PATCH 0/4] Xen: Add Q35 initial support for HVM guests Message-ID: <20260524031423-mutt-send-email-mst@kernel.org> References: <20260313164649.794591-1-thierry.escande@vates.tech> MIME-Version: 1.0 In-Reply-To: <20260313164649.794591-1-thierry.escande@vates.tech> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: UMLJ2wn_Ads9pNsy3JZ6VGbbhgRre4jvXHr2MJ1VWpc_1779606916 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-purgate-ID: tlsNG-42698a/1779606920-18563F3B-3B1B950C/0/0 X-purgate-type: clean X-purgate-size: 2062 On Fri, Mar 13, 2026 at 04:46:56PM +0000, Thierry Escande wrote: > This patch series introduces Q35 chipset support for Xen HVM guests. This is > based on the work from Alexey Gerasimenko (See patchset [1] for reference). > > This series does not implement device passthrough as this will need more work > on the Xen side to support multiple PCI buses. Since Q35 chipset does not > support device hotplugging and with current Xen mechanism for device > passthrough, they have to be plugged to a new PCIe root port, i.e. not the PCI > bus 0. > > As a first step for Q35 guests support, this series implements: > - Legacy interrupt routing for the ICH9 LPC bridge (i.e. not IOAPIC) > - Xen HVM machine initialization in pc_q35_init() > - Access to PCIe Extended Config Space > - Fix for incorrect values and usage for PCIEXBAR masks Xen maintainers, who's merging this? > The corresponding patchset for the Xen Project has been posted at [2]. > > [1] https://lore.kernel.org/xen-devel/cover.1520867740.git.x1917x@gmail.com/ > [2] https://lore.kernel.org/xen-devel/20260313163455.790692-1-thierry.escande@vates.tech/ > > Alexey Gerasimenko (2): > pc/xen: Xen Q35 support: provide IRQ handling for PCI devices > q35: Fix incorrect values for PCIEXBAR masks > > Thierry Escande (2): > q35/xen: Add Xen support for Q35 > xen: Handle PCIe config space size in cpu_ioreq_config() > > hw/i386/pc_piix.c | 2 -- > hw/i386/pc_q35.c | 12 +++++++++++- > hw/i386/xen/xen-hvm.c | 38 ++++++++++++++++++++++++++++++++++++++ > hw/isa/lpc_ich9.c | 16 +++++++++++++--- > hw/pci-host/q35.c | 6 +++--- > hw/xen/xen-hvm-common.c | 11 +++++++---- > include/hw/pci-host/q35.h | 4 ++-- > include/hw/xen/xen.h | 5 +++++ > stubs/xen-hw-stub.c | 4 ++++ > 9 files changed, 83 insertions(+), 15 deletions(-) > > -- > 2.51.0 > > > > -- > Thierry Escande | Vates XCP-ng Developer > > XCP-ng & Xen Orchestra - Vates solutions > > web: https://vates.tech