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b=rZ3WCSx7wV1rnlZAjuz4w5yBfpIXOPq3GBPJKFB09HlUgZJZ+zFGtoA5Q1a2S0CB8/cjLkD5iNxhWw1h1zPrgo1eYhykjHMrdsC7FGC5HdpljdVNMEGXtNRl47JjqvhQTG8ni2FK537po9KEb+Gp7S5uHLyED72WkoNzkkt0RGhz4Bd90dag3UZyVBsCCGw0cSV8Xj6d8+xWAx9lJtM/40iqapSl/vRty10Q5GiE2RsiQyDjUVCnENJ8H3yw7jb3SmneKodrdPTGrRcpiiSgEl04nLnHeZL08WIK/4bD6JdqXAthutCRlctulFxZKfdyU/tr3/8I8xIBoMrxWsXozQ== From: Milan Djokic To: "xen-devel@lists.xenproject.org" CC: Rahul Singh , Anthony PERARD , Juergen Gross , Milan Djokic Subject: [PATCH v3 16/23] arm/libxl: vsmmuv3: Emulated SMMUv3 device tree node in libxl Thread-Topic: [PATCH v3 16/23] arm/libxl: vsmmuv3: Emulated SMMUv3 device tree node in libxl Thread-Index: AQHcwLD+lzo9LgbX1UGwfRiRzfrENQ== Date: Tue, 31 Mar 2026 01:52:13 +0000 Message-ID: <58c7eb798749c8c78935f5a8fc9e0aeff81760bb.1774918270.git.milan_djokic@epam.com> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=epam.com; 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charset="utf-8" From: Rahul Singh libxl will create an Emulated SMMUv3 device tree node in the device tree to enable the guest OS to discover the virtual SMMUv3 during guest boot. Emulated SMMUv3 device tree node will only be created when "viommu=3Dsmmuv3" is set in xl domain configuration. Signed-off-by: Rahul Singh Signed-off-by: Milan Djokic --- tools/libs/light/libxl_arm.c | 37 ++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/tools/libs/light/libxl_arm.c b/tools/libs/light/libxl_arm.c index a248793588..eb879473f5 100644 --- a/tools/libs/light/libxl_arm.c +++ b/tools/libs/light/libxl_arm.c @@ -901,6 +901,36 @@ static int make_vpl011_uart_node(libxl__gc *gc, void *= fdt, return 0; } =20 +static int make_vsmmuv3_node(libxl__gc *gc, void *fdt, + const struct arch_info *ainfo, + struct xc_dom_image *dom) +{ + int res; + const char *name =3D GCSPRINTF("iommu@%llx", GUEST_VSMMUV3_BASE); + + res =3D fdt_begin_node(fdt, name); + if (res) return res; + + res =3D fdt_property_compat(gc, fdt, 1, "arm,smmu-v3"); + if (res) return res; + + res =3D fdt_property_regs(gc, fdt, GUEST_ROOT_ADDRESS_CELLS, + GUEST_ROOT_SIZE_CELLS, 1, GUEST_VSMMUV3_BASE, + GUEST_VSMMUV3_SIZE); + if (res) return res; + + res =3D fdt_property_cell(fdt, "phandle", GUEST_PHANDLE_VSMMUV3); + if (res) return res; + + res =3D fdt_property_cell(fdt, "#iommu-cells", 1); + if (res) return res; + + res =3D fdt_end_node(fdt); + if (res) return res; + + return 0; +} + static int make_vpci_node(libxl__gc *gc, void *fdt, const struct arch_info *ainfo, struct xc_dom_image *dom) @@ -942,6 +972,10 @@ static int make_vpci_node(libxl__gc *gc, void *fdt, GUEST_VPCI_PREFETCH_MEM_SIZE); if (res) return res; =20 + res =3D fdt_property_values(gc, fdt, "iommu-map", 4, 0, + GUEST_PHANDLE_VSMMUV3, 0, 0x10000); + if (res) return res; + res =3D fdt_end_node(fdt); if (res) return res; =20 @@ -1408,6 +1442,9 @@ next_resize: if (d_config->num_pcidevs) FDT( make_vpci_node(gc, fdt, ainfo, dom) ); =20 + if (info->arch_arm.viommu_type =3D=3D LIBXL_VIOMMU_TYPE_SMMUV3) + FDT( make_vsmmuv3_node(gc, fdt, ainfo, dom) ); + for (i =3D 0; i < d_config->num_disks; i++) { libxl_device_disk *disk =3D &d_config->disks[i]; =20 --=20 2.43.0