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Thu, 23 Sep 2021 05:54:41 -0700 (PDT) From: Oleksandr Andrushchenko To: xen-devel@lists.xenproject.org Cc: julien@xen.org, sstabellini@kernel.org, oleksandr_tyshchenko@epam.com, volodymyr_babchuk@epam.com, Artem_Mygaiev@epam.com, roger.pau@citrix.com, bertrand.marquis@arm.com, rahul.singh@arm.com, Oleksandr Andrushchenko Subject: [PATCH v2 01/11] xen/arm: Fix dev_is_dt macro definition Date: Thu, 23 Sep 2021 15:54:28 +0300 Message-Id: <20210923125438.234162-2-andr2000@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210923125438.234162-1-andr2000@gmail.com> References: <20210923125438.234162-1-andr2000@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1632401712170100001 Content-Type: text/plain; charset="utf-8" From: Oleksandr Andrushchenko This macro is not currently used, but still has an error in it: a missing parenthesis. Fix this, so the macro is properly defined. Fixes: 6c5d3075d97e ("xen/arm: Introduce a generic way to describe device") Signed-off-by: Oleksandr Andrushchenko Reviewed-by: Michal Orzel Reviewed-by: Stefano Stabellini --- New in v2 --- xen/include/asm-arm/device.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/include/asm-arm/device.h b/xen/include/asm-arm/device.h index 582119c31ee0..64aaa2641b7f 100644 --- a/xen/include/asm-arm/device.h +++ b/xen/include/asm-arm/device.h @@ -29,7 +29,7 @@ typedef struct device device_t; =20 /* TODO: Correctly implement dev_is_pci when PCI is supported on ARM */ #define dev_is_pci(dev) ((void)(dev), 0) -#define dev_is_dt(dev) ((dev->type =3D=3D DEV_DT) +#define dev_is_dt(dev) ((dev)->type =3D=3D DEV_DT) =20 enum device_class { --=20 2.25.1 From nobody Fri Nov 29 16:32:51 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; 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Thu, 23 Sep 2021 05:54:42 -0700 (PDT) From: Oleksandr Andrushchenko To: xen-devel@lists.xenproject.org Cc: julien@xen.org, sstabellini@kernel.org, oleksandr_tyshchenko@epam.com, volodymyr_babchuk@epam.com, Artem_Mygaiev@epam.com, roger.pau@citrix.com, bertrand.marquis@arm.com, rahul.singh@arm.com, Oleksandr Andrushchenko Subject: [PATCH v2 02/11] xen/arm: Add new device type for PCI Date: Thu, 23 Sep 2021 15:54:29 +0300 Message-Id: <20210923125438.234162-3-andr2000@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210923125438.234162-1-andr2000@gmail.com> References: <20210923125438.234162-1-andr2000@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1632401715992100003 Content-Type: text/plain; charset="utf-8" From: Oleksandr Andrushchenko Add new device type (DEV_PCI) to distinguish PCI devices from platform DT devices, so some drivers, like IOMMU, can handle PCI devices differently. Also add a helper which is when given a struct device returns the corresponding struct pci_dev which this device is a part of. Because of the header cross-dependencies, e.g. we need both struct pci_dev and struct arch_pci_dev at the same time, this cannot be done with an inline. Macro can be implemented, but looks scary: #define dev_to_pci_dev(dev) container_of((container_of((dev), \ struct arch_pci_dev, dev), struct pci_dev, arch) Signed-off-by: Oleksandr Andrushchenko Reviewed-by: Stefano Stabellini --- Since v1: - Folded new device type (DEV_PCI) into this patch. --- xen/arch/arm/pci/pci.c | 10 ++++++++++ xen/include/asm-arm/device.h | 4 ++-- xen/include/asm-arm/pci.h | 7 +++++++ 3 files changed, 19 insertions(+), 2 deletions(-) diff --git a/xen/arch/arm/pci/pci.c b/xen/arch/arm/pci/pci.c index bb15edbccc90..e0420d0d86c1 100644 --- a/xen/arch/arm/pci/pci.c +++ b/xen/arch/arm/pci/pci.c @@ -27,6 +27,16 @@ int arch_pci_clean_pirqs(struct domain *d) return 0; } =20 +struct pci_dev *dev_to_pci(struct device *dev) +{ + struct arch_pci_dev *arch_dev; + + ASSERT(dev->type =3D=3D DEV_PCI); + + arch_dev =3D container_of((dev), struct arch_pci_dev, dev); + return container_of(arch_dev, struct pci_dev, arch); +} + static int __init dt_pci_init(void) { struct dt_device_node *np; diff --git a/xen/include/asm-arm/device.h b/xen/include/asm-arm/device.h index 64aaa2641b7f..12de217b36b9 100644 --- a/xen/include/asm-arm/device.h +++ b/xen/include/asm-arm/device.h @@ -4,6 +4,7 @@ enum device_type { DEV_DT, + DEV_PCI, }; =20 struct dev_archdata { @@ -27,8 +28,7 @@ typedef struct device device_t; =20 #include =20 -/* TODO: Correctly implement dev_is_pci when PCI is supported on ARM */ -#define dev_is_pci(dev) ((void)(dev), 0) +#define dev_is_pci(dev) ((dev)->type =3D=3D DEV_PCI) #define dev_is_dt(dev) ((dev)->type =3D=3D DEV_DT) =20 enum device_class diff --git a/xen/include/asm-arm/pci.h b/xen/include/asm-arm/pci.h index d2728a098a11..9e366ae67e83 100644 --- a/xen/include/asm-arm/pci.h +++ b/xen/include/asm-arm/pci.h @@ -27,6 +27,13 @@ struct arch_pci_dev { struct device dev; }; =20 +/* + * Because of the header cross-dependencies, e.g. we need both + * struct pci_dev and struct arch_pci_dev at the same time, this cannot be + * done with an inline here. 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charset="utf-8" From: Oleksandr Andrushchenko Get host bridge node given a PCI device attached to it. This helper will be re-used for adding PCI devices by the subsequent patches. Signed-off-by: Oleksandr Andrushchenko Signed-off-by: Oleksandr Tyshchenko Reviewed-by: Stefano Stabellini --- xen/arch/arm/pci/pci-host-common.c | 17 +++++++++++++++++ xen/include/asm-arm/pci.h | 1 + 2 files changed, 18 insertions(+) diff --git a/xen/arch/arm/pci/pci-host-common.c b/xen/arch/arm/pci/pci-host= -common.c index a88f20175ea9..1567b6e2956c 100644 --- a/xen/arch/arm/pci/pci-host-common.c +++ b/xen/arch/arm/pci/pci-host-common.c @@ -283,6 +283,23 @@ int pci_get_host_bridge_segment(const struct dt_device= _node *node, return -EINVAL; } =20 +/* + * Get host bridge node given a device attached to it. + */ +struct dt_device_node *pci_find_host_bridge_node(struct device *dev) +{ + struct pci_host_bridge *bridge; + struct pci_dev *pdev =3D dev_to_pci(dev); + + bridge =3D pci_find_host_bridge(pdev->seg, pdev->bus); + if ( unlikely(!bridge) ) + { + printk(XENLOG_ERR "Unable to find PCI bridge for "PRI_pci"\n", + pdev->seg, pdev->bus, pdev->sbdf.dev, pdev->sbdf.fn); + return NULL; + } + return bridge->dt_node; +} /* * Local variables: * mode: C diff --git a/xen/include/asm-arm/pci.h b/xen/include/asm-arm/pci.h index 9e366ae67e83..5b100556225e 100644 --- a/xen/include/asm-arm/pci.h +++ b/xen/include/asm-arm/pci.h @@ -103,6 +103,7 @@ void __iomem *pci_ecam_map_bus(struct pci_host_bridge *= bridge, struct pci_host_bridge *pci_find_host_bridge(uint16_t segment, uint8_t bus= ); int pci_get_host_bridge_segment(const struct dt_device_node *node, uint16_t *segment); +struct dt_device_node *pci_find_host_bridge_node(struct device *dev); =20 static always_inline bool is_pci_passthrough_enabled(void) { --=20 2.25.1 From nobody Fri Nov 29 16:32:51 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; 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charset="utf-8" From: Oleksandr Andrushchenko Make dt_find_node_by_phandle globally visible, so it can be re-used by other frameworks. Signed-off-by: Oleksandr Andrushchenko Reviewed-by: Stefano Stabellini --- xen/common/device_tree.c | 2 +- xen/include/xen/device_tree.h | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c index ea93da1725f6..4aae281e89bf 100644 --- a/xen/common/device_tree.c +++ b/xen/common/device_tree.c @@ -1047,7 +1047,7 @@ int dt_for_each_range(const struct dt_device_node *de= v, * * Returns a node pointer. */ -static struct dt_device_node *dt_find_node_by_phandle(dt_phandle handle) +struct dt_device_node *dt_find_node_by_phandle(dt_phandle handle) { struct dt_device_node *np; =20 diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h index 9069040ef7f7..3334048d3bb5 100644 --- a/xen/include/xen/device_tree.h +++ b/xen/include/xen/device_tree.h @@ -850,6 +850,8 @@ int dt_count_phandle_with_args(const struct dt_device_n= ode *np, */ int dt_get_pci_domain_nr(struct dt_device_node *node); =20 +struct dt_device_node *dt_find_node_by_phandle(dt_phandle handle); 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charset="utf-8" From: Oleksandr Andrushchenko While adding a PCI device mark it as such, so other frameworks can distinguish it form DT devices. Signed-off-by: Oleksandr Andrushchenko Reviewed-by: Stefano Stabellini --- Since v1: - Moved the assignment from iommu_add_device to alloc_pdev --- xen/drivers/passthrough/pci.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/xen/drivers/passthrough/pci.c b/xen/drivers/passthrough/pci.c index 633e89ac1311..fc3469bc12dc 100644 --- a/xen/drivers/passthrough/pci.c +++ b/xen/drivers/passthrough/pci.c @@ -328,6 +328,9 @@ static struct pci_dev *alloc_pdev(struct pci_seg *pseg,= u8 bus, u8 devfn) *((u8*) &pdev->bus) =3D bus; *((u8*) &pdev->devfn) =3D devfn; pdev->domain =3D NULL; +#ifdef CONFIG_ARM + pci_to_dev(pdev)->type =3D DEV_PCI; +#endif =20 rc =3D pdev_msi_init(pdev); if ( rc ) --=20 2.25.1 From nobody Fri Nov 29 16:32:51 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; 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Thu, 23 Sep 2021 05:54:47 -0700 (PDT) From: Oleksandr Andrushchenko To: xen-devel@lists.xenproject.org Cc: julien@xen.org, sstabellini@kernel.org, oleksandr_tyshchenko@epam.com, volodymyr_babchuk@epam.com, Artem_Mygaiev@epam.com, roger.pau@citrix.com, bertrand.marquis@arm.com, rahul.singh@arm.com Subject: [PATCH v2 06/11] xen/domain: Call pci_release_devices() when releasing domain resources Date: Thu, 23 Sep 2021 15:54:33 +0300 Message-Id: <20210923125438.234162-7-andr2000@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210923125438.234162-1-andr2000@gmail.com> References: <20210923125438.234162-1-andr2000@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1632401727932100001 Content-Type: text/plain; charset="utf-8" From: Oleksandr Tyshchenko This is the very same that we already do for DT devices. Moreover, x86 already calls pci_release_devices(). Signed-off-by: Oleksandr Tyshchenko Reviewed-by: Stefano Stabellini --- Since v1: - re-wording in the commit message --- xen/arch/arm/domain.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c index f7ed130023d5..854e8fed0393 100644 --- a/xen/arch/arm/domain.c +++ b/xen/arch/arm/domain.c @@ -985,7 +985,8 @@ static int relinquish_memory(struct domain *d, struct p= age_list_head *list) * function which may return -ERESTART. */ enum { - PROG_tee =3D 1, + PROG_pci =3D 1, + PROG_tee, PROG_xen, PROG_page, PROG_mapping, @@ -1022,6 +1023,12 @@ int domain_relinquish_resources(struct domain *d) #ifdef CONFIG_IOREQ_SERVER ioreq_server_destroy_all(d); #endif +#ifdef CONFIG_HAS_PCI + PROGRESS(pci): + ret =3D pci_release_devices(d); + if ( ret ) + return ret; +#endif =20 PROGRESS(tee): ret =3D tee_relinquish_resources(d); --=20 2.25.1 From nobody Fri Nov 29 16:32:51 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; 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Thu, 23 Sep 2021 05:54:49 -0700 (PDT) From: Oleksandr Andrushchenko To: xen-devel@lists.xenproject.org Cc: julien@xen.org, sstabellini@kernel.org, oleksandr_tyshchenko@epam.com, volodymyr_babchuk@epam.com, Artem_Mygaiev@epam.com, roger.pau@citrix.com, bertrand.marquis@arm.com, rahul.singh@arm.com, Oleksandr Andrushchenko , Ian Jackson , Juergen Gross Subject: [PATCH v2 07/11] libxl: Allow removing PCI devices for all types of domains Date: Thu, 23 Sep 2021 15:54:34 +0300 Message-Id: <20210923125438.234162-8-andr2000@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210923125438.234162-1-andr2000@gmail.com> References: <20210923125438.234162-1-andr2000@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1632401732357100001 Content-Type: text/plain; charset="utf-8" From: Oleksandr Andrushchenko The PCI device remove path may now be used by PVH on ARM, so the assert is no longer valid. Signed-off-by: Oleksandr Andrushchenko Cc: Ian Jackson Cc: Juergen Gross --- tools/libs/light/libxl_pci.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/tools/libs/light/libxl_pci.c b/tools/libs/light/libxl_pci.c index 1a1c2630803b..59f3686fc85e 100644 --- a/tools/libs/light/libxl_pci.c +++ b/tools/libs/light/libxl_pci.c @@ -1947,8 +1947,6 @@ static void do_pci_remove(libxl__egc *egc, pci_remove= _state *prs) goto out_fail; } } else { - assert(type =3D=3D LIBXL_DOMAIN_TYPE_PV); - char *sysfs_path =3D GCSPRINTF(SYSFS_PCI_DEV"/"PCI_BDF"/resource",= pci->domain, pci->bus, pci->dev, pci->func); FILE *f =3D fopen(sysfs_path, "r"); --=20 2.25.1 From nobody Fri Nov 29 16:32:51 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; 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charset="utf-8" From: Oleksandr Andrushchenko Arm's PCI passthrough implementation doesn't support legacy interrupts, but MSI/MSI-X. This can be the case for other platforms too. For that reason introduce a new CONFIG_PCI_SUPP_LEGACY_IRQ and add it to the CFLAGS and compile the relevant code in the toolstack only if applicable. Signed-off-by: Oleksandr Andrushchenko Cc: Ian Jackson Cc: Juergen Gross --- Since v1: - Minimized #idefery by introducing pci_supp_legacy_irq function for relevant checks --- tools/libs/light/Makefile | 4 ++++ tools/libs/light/libxl_pci.c | 13 +++++++++++++ 2 files changed, 17 insertions(+) diff --git a/tools/libs/light/Makefile b/tools/libs/light/Makefile index 7d8c51d49242..bd3f6be2a183 100644 --- a/tools/libs/light/Makefile +++ b/tools/libs/light/Makefile @@ -46,6 +46,10 @@ CFLAGS +=3D -Wno-format-zero-length -Wmissing-declaratio= ns \ -Wno-declaration-after-statement -Wformat-nonliteral CFLAGS +=3D -I. =20 +ifeq ($(CONFIG_X86),y) +CFLAGS +=3D -DCONFIG_PCI_SUPP_LEGACY_IRQ +endif + SRCS-$(CONFIG_X86) +=3D libxl_cpuid.c SRCS-$(CONFIG_X86) +=3D libxl_x86.c SRCS-$(CONFIG_X86) +=3D libxl_psr.c diff --git a/tools/libs/light/libxl_pci.c b/tools/libs/light/libxl_pci.c index 59f3686fc85e..4c2d7aeefbb2 100644 --- a/tools/libs/light/libxl_pci.c +++ b/tools/libs/light/libxl_pci.c @@ -1364,6 +1364,15 @@ static void pci_add_timeout(libxl__egc *egc, libxl__= ev_time *ev, pci_add_dm_done(egc, pas, rc); } =20 +static bool pci_supp_legacy_irq(void) +{ +#ifdef CONFIG_PCI_SUPP_LEGACY_IRQ + return true; +#else + return false; +#endif +} + static void pci_add_dm_done(libxl__egc *egc, pci_add_state *pas, int rc) @@ -1434,6 +1443,8 @@ static void pci_add_dm_done(libxl__egc *egc, } } fclose(f); + if (!pci_supp_legacy_irq()) + goto out_no_irq; sysfs_path =3D GCSPRINTF(SYSFS_PCI_DEV"/"PCI_BDF"/irq", pci->domain, pci->bus, pci->dev, pci->func); f =3D fopen(sysfs_path, "r"); @@ -1983,6 +1994,8 @@ static void do_pci_remove(libxl__egc *egc, pci_remove= _state *prs) } fclose(f); skip1: + if (!pci_supp_legacy_irq()) + goto skip_irq; sysfs_path =3D GCSPRINTF(SYSFS_PCI_DEV"/"PCI_BDF"/irq", pci->domai= n, pci->bus, pci->dev, pci->func); f =3D fopen(sysfs_path, "r"); --=20 2.25.1 From nobody Fri Nov 29 16:32:51 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; 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Thu, 23 Sep 2021 05:54:51 -0700 (PDT) From: Oleksandr Andrushchenko To: xen-devel@lists.xenproject.org Cc: julien@xen.org, sstabellini@kernel.org, oleksandr_tyshchenko@epam.com, volodymyr_babchuk@epam.com, Artem_Mygaiev@epam.com, roger.pau@citrix.com, bertrand.marquis@arm.com, rahul.singh@arm.com, Oleksandr Andrushchenko Subject: [PATCH v2 09/11] xen/arm: Setup MMIO range trap handlers for hardware domain Date: Thu, 23 Sep 2021 15:54:36 +0300 Message-Id: <20210923125438.234162-10-andr2000@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210923125438.234162-1-andr2000@gmail.com> References: <20210923125438.234162-1-andr2000@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1632401739017100001 Content-Type: text/plain; charset="utf-8" From: Oleksandr Andrushchenko In order for vPCI to work it needs to maintain guest and hardware domain's views on the configuration space. For example, BARs and COMMAND registers require emulation for guests and the guest view on the registers needs to be in sync with the real contents of the relevant registers. For that ECAM address space needs to also be trapped for the hardware domain, so we need to implement PCI host bridge specific callbacks to properly setup MMIO handlers for those ranges depending on particular host bridge implementation. Signed-off-by: Oleksandr Andrushchenko --- Since v1: - Dynamically calculate the number of MMIO handlers required for vPCI and update the total number accordingly - s/clb/cb - Do not introduce a new callback for MMIO handler setup --- xen/arch/arm/domain.c | 2 ++ xen/arch/arm/pci/pci-host-common.c | 28 +++++++++++++++++++++++++ xen/arch/arm/vpci.c | 33 ++++++++++++++++++++++++++++++ xen/arch/arm/vpci.h | 6 ++++++ xen/include/asm-arm/pci.h | 7 +++++++ 5 files changed, 76 insertions(+) diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c index 854e8fed0393..c7b25bc70439 100644 --- a/xen/arch/arm/domain.c +++ b/xen/arch/arm/domain.c @@ -733,6 +733,8 @@ int arch_domain_create(struct domain *d, if ( (rc =3D domain_vgic_register(d, &count)) !=3D 0 ) goto fail; =20 + count +=3D domain_vpci_get_num_mmio_handlers(d); + if ( (rc =3D domain_io_init(d, count + MAX_IO_HANDLER)) !=3D 0 ) goto fail; =20 diff --git a/xen/arch/arm/pci/pci-host-common.c b/xen/arch/arm/pci/pci-host= -common.c index 1567b6e2956c..155f2a2743af 100644 --- a/xen/arch/arm/pci/pci-host-common.c +++ b/xen/arch/arm/pci/pci-host-common.c @@ -300,6 +300,34 @@ struct dt_device_node *pci_find_host_bridge_node(struc= t device *dev) } return bridge->dt_node; } + +int pci_host_iterate_bridges(struct domain *d, + int (*cb)(struct domain *d, + struct pci_host_bridge *bridge)) +{ + struct pci_host_bridge *bridge; + int err; + + list_for_each_entry( bridge, &pci_host_bridges, node ) + { + err =3D cb(d, bridge); + if ( err ) + return err; + } + return 0; +} + +int pci_host_get_num_bridges(void) +{ + struct pci_host_bridge *bridge; + int count =3D 0; + + list_for_each_entry( bridge, &pci_host_bridges, node ) + count++; + + return count; +} + /* * Local variables: * mode: C diff --git a/xen/arch/arm/vpci.c b/xen/arch/arm/vpci.c index 76c12b92814f..14947e975d69 100644 --- a/xen/arch/arm/vpci.c +++ b/xen/arch/arm/vpci.c @@ -80,17 +80,50 @@ static const struct mmio_handler_ops vpci_mmio_handler = =3D { .write =3D vpci_mmio_write, }; =20 +static int vpci_setup_mmio_handler(struct domain *d, + struct pci_host_bridge *bridge) +{ + struct pci_config_window *cfg =3D bridge->cfg; + + register_mmio_handler(d, &vpci_mmio_handler, + cfg->phys_addr, cfg->size, NULL); + return 0; +} + int domain_vpci_init(struct domain *d) { if ( !has_vpci(d) ) return 0; =20 + if ( is_hardware_domain(d) ) + return pci_host_iterate_bridges(d, vpci_setup_mmio_handler); + + /* Guest domains use what is programmed in their device tree. */ register_mmio_handler(d, &vpci_mmio_handler, GUEST_VPCI_ECAM_BASE, GUEST_VPCI_ECAM_SIZE, NULL= ); =20 return 0; } =20 +int domain_vpci_get_num_mmio_handlers(struct domain *d) +{ + int count =3D 0; + + if ( is_hardware_domain(d) ) + /* For each PCI host bridge's configuration space. */ + count +=3D pci_host_get_num_bridges(); + else + /* + * VPCI_MSIX_MEM_NUM handlers for MSI-X tables per each PCI device + * being passed through. Maximum number of supported devices + * is 32 as virtual bus topology emulates the devices as embedded + * endpoints. + * +1 for a single emulated host bridge's configuration space. */ + count =3D VPCI_MSIX_MEM_NUM * 32 + 1; + + return count; +} + /* * Local variables: * mode: C diff --git a/xen/arch/arm/vpci.h b/xen/arch/arm/vpci.h index d8a7b0e3e802..27a2b069abd2 100644 --- a/xen/arch/arm/vpci.h +++ b/xen/arch/arm/vpci.h @@ -17,11 +17,17 @@ =20 #ifdef CONFIG_HAS_VPCI int domain_vpci_init(struct domain *d); +int domain_vpci_get_num_mmio_handlers(struct domain *d); #else static inline int domain_vpci_init(struct domain *d) { return 0; } + +static inline int domain_vpci_get_num_mmio_handlers(struct domain *d) +{ + return 0; +} #endif =20 #endif /* __ARCH_ARM_VPCI_H__ */ diff --git a/xen/include/asm-arm/pci.h b/xen/include/asm-arm/pci.h index 5b100556225e..7618f0b6725b 100644 --- a/xen/include/asm-arm/pci.h +++ b/xen/include/asm-arm/pci.h @@ -15,6 +15,8 @@ #ifndef __ARM_PCI_H__ #define __ARM_PCI_H__ =20 +#include + #ifdef CONFIG_HAS_PCI =20 #define pci_to_dev(pcidev) (&(pcidev)->arch.dev) @@ -109,6 +111,11 @@ static always_inline bool is_pci_passthrough_enabled(v= oid) { return !!pci_passthrough_enabled; 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charset="utf-8" From: Oleksandr Andrushchenko PCI host bridges are special devices in terms of implementing PCI passthrough. According to [1] the current implementation depends on Domain-0 to perform the initialization of the relevant PCI host bridge hardware and perform PCI device enumeration. In order to achieve that one of the required changes is to not map all the memory ranges in map_range_to_domain as we traverse the device tree on startup and perform some additional checks if the range needs to be mapped to Domain-0. The generic PCI host controller device tree binding says [2]: - ranges: As described in IEEE Std 1275-1994, but must provide at least a definition of non-prefetchable memory. One or both of prefetchable Memory and IO Space may also be provided. - reg : The Configuration Space base address and size, as accessed from the parent bus. The base address corresponds to the first bus in the "bus-range" property. If no "bus-range" is specified, this will be bus 0 (the default). From the above none of the memory ranges from the "ranges" property needs to be mapped to Domain-0 at startup as MMIO mapping is going to be handled dynamically by vPCI as we assign PCI devices, e.g. each device assigned to Domain-0/guest will have its MMIOs mapped/unmapped as needed by Xen. The "reg" property covers not only ECAM space, but may also have other then the configuration memory ranges described, for example [3]: - reg: Should contain rc_dbi, config registers location and length. - reg-names: Must include the following entries: "rc_dbi": controller configuration registers; "config": PCIe configuration space registers. This patch makes it possible to not map all the ranges from the "ranges" property and also ECAM from the "reg". All the rest from the "reg" property still needs to be mapped to Domain-0, so the PCI host bridge remains functional in Domain-0. [1] https://lists.xenproject.org/archives/html/xen-devel/2020-07/msg00777.h= tml [2] https://www.kernel.org/doc/Documentation/devicetree/bindings/pci/host-g= eneric-pci.txt [3] https://www.kernel.org/doc/Documentation/devicetree/bindings/pci/hisili= con-pcie.txt Signed-off-by: Oleksandr Andrushchenko --- Since v1: - Added better description of why and what needs to be mapped into Domain-0's p2m and what doesn't - Do not do any mappings for PCI devices while traversing the DT - Walk all the bridges and make required mappings in one go --- xen/arch/arm/domain_build.c | 38 +++++++++++++++-------- xen/arch/arm/pci/ecam.c | 14 +++++++++ xen/arch/arm/pci/pci-host-common.c | 48 ++++++++++++++++++++++++++++++ xen/arch/arm/pci/pci-host-zynqmp.c | 1 + xen/include/asm-arm/pci.h | 9 ++++++ xen/include/asm-arm/setup.h | 13 ++++++++ 6 files changed, 111 insertions(+), 12 deletions(-) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 83ab0d52cce9..e72c1b881cae 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -10,7 +10,6 @@ #include #include #include -#include #include #include #include @@ -47,12 +46,6 @@ static int __init parse_dom0_mem(const char *s) } custom_param("dom0_mem", parse_dom0_mem); =20 -struct map_range_data -{ - struct domain *d; - p2m_type_t p2mt; -}; - /* Override macros from asm/page.h to make them work with mfn_t */ #undef virt_to_mfn #define virt_to_mfn(va) _mfn(__virt_to_mfn(va)) @@ -1388,9 +1381,8 @@ static int __init map_dt_irq_to_domain(const struct d= t_device_node *dev, return 0; } =20 -static int __init map_range_to_domain(const struct dt_device_node *dev, - u64 addr, u64 len, - void *data) +int __init map_range_to_domain(const struct dt_device_node *dev, + u64 addr, u64 len, void *data) { struct map_range_data *mr_data =3D data; struct domain *d =3D mr_data->d; @@ -1417,6 +1409,13 @@ static int __init map_range_to_domain(const struct d= t_device_node *dev, } } =20 +#ifdef CONFIG_HAS_PCI + if ( is_pci_passthrough_enabled() && + (device_get_class(dev) =3D=3D DEVICE_PCI) && + !mr_data->map_pci_bridge ) + need_mapping =3D false; +#endif + if ( need_mapping ) { res =3D map_regions_p2mt(d, @@ -1450,7 +1449,11 @@ static int __init map_device_children(struct domain = *d, const struct dt_device_node *dev, p2m_type_t p2mt) { - struct map_range_data mr_data =3D { .d =3D d, .p2mt =3D p2mt }; + struct map_range_data mr_data =3D { + .d =3D d, + .p2mt =3D p2mt, + .map_pci_bridge =3D false + }; int ret; =20 if ( dt_device_type_is_equal(dev, "pci") ) @@ -1582,7 +1585,11 @@ static int __init handle_device(struct domain *d, st= ruct dt_device_node *dev, /* Give permission and map MMIOs */ for ( i =3D 0; i < naddr; i++ ) { - struct map_range_data mr_data =3D { .d =3D d, .p2mt =3D p2mt }; + struct map_range_data mr_data =3D { + .d =3D d, + .p2mt =3D p2mt, + .map_pci_bridge =3D false + }; res =3D dt_device_get_address(dev, i, &addr, &size); if ( res ) { @@ -2754,7 +2761,14 @@ static int __init construct_dom0(struct domain *d) return rc; =20 if ( acpi_disabled ) + { rc =3D prepare_dtb_hwdom(d, &kinfo); +#ifdef CONFIG_HAS_PCI + if ( rc < 0 ) + return rc; + rc =3D pci_host_bridge_mappings(d, p2m_mmio_direct_c); +#endif + } else rc =3D prepare_acpi(d, &kinfo); =20 diff --git a/xen/arch/arm/pci/ecam.c b/xen/arch/arm/pci/ecam.c index 9b88b1cedaa2..eae177f2cbc2 100644 --- a/xen/arch/arm/pci/ecam.c +++ b/xen/arch/arm/pci/ecam.c @@ -39,6 +39,19 @@ void __iomem *pci_ecam_map_bus(struct pci_host_bridge *b= ridge, return base + (PCI_DEVFN2(sbdf) << devfn_shift) + where; } =20 +bool pci_ecam_need_p2m_mapping(struct domain *d, + struct pci_host_bridge *bridge, + uint64_t addr) +{ + struct pci_config_window *cfg =3D bridge->cfg; + + /* + * We do not want ECAM address space to be mapped in Domain-0's p2m, + * so we can trap access to it. + */ + return cfg->phys_addr !=3D addr; +} + /* ECAM ops */ const struct pci_ecam_ops pci_generic_ecam_ops =3D { .bus_shift =3D 20, @@ -46,6 +59,7 @@ const struct pci_ecam_ops pci_generic_ecam_ops =3D { .map_bus =3D pci_ecam_map_bus, .read =3D pci_generic_config_read, .write =3D pci_generic_config_write, + .need_p2m_mapping =3D pci_ecam_need_p2m_mapping, } }; =20 diff --git a/xen/arch/arm/pci/pci-host-common.c b/xen/arch/arm/pci/pci-host= -common.c index 155f2a2743af..f350826ea26b 100644 --- a/xen/arch/arm/pci/pci-host-common.c +++ b/xen/arch/arm/pci/pci-host-common.c @@ -18,6 +18,7 @@ =20 #include #include +#include #include #include #include @@ -328,6 +329,53 @@ int pci_host_get_num_bridges(void) return count; } =20 +int __init pci_host_bridge_mappings(struct domain *d, p2m_type_t p2mt) +{ + struct pci_host_bridge *bridge; + struct map_range_data mr_data =3D { + .d =3D d, + .p2mt =3D p2mt, + .map_pci_bridge =3D true + }; + + /* + * For each PCI host bridge we need to only map those ranges + * which are used by Domain-0 to properly initialize the bridge, + * e.g. we do not want to map ECAM configuration space which lives in + * "reg" or "assigned-addresses" device tree property. + * Neither we want to map any of the MMIO ranges found in the "ranges" + * device tree property. + */ + list_for_each_entry( bridge, &pci_host_bridges, node ) + { + const struct dt_device_node *dev =3D bridge->dt_node; + int i; + + for ( i =3D 0; i < dt_number_of_address(dev); i++ ) + { + uint64_t addr, size; + int err; + + err =3D dt_device_get_address(dev, i, &addr, &size); + if ( err ) + { + printk(XENLOG_ERR "Unable to retrieve address %u for %s\n", + i, dt_node_full_name(dev)); + return err; + } + + if ( bridge->ops->need_p2m_mapping(d, bridge, addr) ) + { + err =3D map_range_to_domain(dev, addr, size, &mr_data); + if ( err ) + return err; + } + } + } + + return 0; +} + /* * Local variables: * mode: C diff --git a/xen/arch/arm/pci/pci-host-zynqmp.c b/xen/arch/arm/pci/pci-host= -zynqmp.c index c27b4ea9f02f..adbe3627871f 100644 --- a/xen/arch/arm/pci/pci-host-zynqmp.c +++ b/xen/arch/arm/pci/pci-host-zynqmp.c @@ -33,6 +33,7 @@ const struct pci_ecam_ops nwl_pcie_ops =3D { .map_bus =3D pci_ecam_map_bus, .read =3D pci_generic_config_read, .write =3D pci_generic_config_write, + .need_p2m_mapping =3D pci_ecam_need_p2m_mapping, } }; =20 diff --git a/xen/include/asm-arm/pci.h b/xen/include/asm-arm/pci.h index 7618f0b6725b..b81f66e813ef 100644 --- a/xen/include/asm-arm/pci.h +++ b/xen/include/asm-arm/pci.h @@ -19,6 +19,8 @@ =20 #ifdef CONFIG_HAS_PCI =20 +#include + #define pci_to_dev(pcidev) (&(pcidev)->arch.dev) #define PRI_pci "%04x:%02x:%02x.%u" =20 @@ -79,6 +81,9 @@ struct pci_ops { uint32_t reg, uint32_t len, uint32_t *value); int (*write)(struct pci_host_bridge *bridge, uint32_t sbdf, uint32_t reg, uint32_t len, uint32_t value); + bool (*need_p2m_mapping)(struct domain *d, + struct pci_host_bridge *bridge, + uint64_t addr); }; =20 /* @@ -102,6 +107,9 @@ int pci_generic_config_write(struct pci_host_bridge *br= idge, uint32_t sbdf, uint32_t reg, uint32_t len, uint32_t value); void __iomem *pci_ecam_map_bus(struct pci_host_bridge *bridge, uint32_t sbdf, uint32_t where); +bool pci_ecam_need_p2m_mapping(struct domain *d, + struct pci_host_bridge *bridge, + uint64_t addr); struct pci_host_bridge *pci_find_host_bridge(uint16_t segment, uint8_t bus= ); int pci_get_host_bridge_segment(const struct dt_device_node *node, uint16_t *segment); @@ -116,6 +124,7 @@ int pci_host_iterate_bridges(struct domain *d, int (*clb)(struct domain *d, struct pci_host_bridge *bridge)); int pci_host_get_num_bridges(void); +int pci_host_bridge_mappings(struct domain *d, p2m_type_t p2mt); #else /*!CONFIG_HAS_PCI*/ =20 #define pci_passthrough_enabled (false) diff --git a/xen/include/asm-arm/setup.h b/xen/include/asm-arm/setup.h index 95da0b7ab9cd..21863dd2bc58 100644 --- a/xen/include/asm-arm/setup.h +++ b/xen/include/asm-arm/setup.h @@ -2,6 +2,8 @@ #define __ARM_SETUP_H_ =20 #include +#include +#include =20 #define MIN_FDT_ALIGN 8 #define MAX_FDT_SIZE SZ_2M @@ -77,6 +79,14 @@ struct bootinfo { #endif }; =20 +struct map_range_data +{ + struct domain *d; + p2m_type_t p2mt; + /* Set if mappings for PCI host bridges must not be skipped. */ + bool map_pci_bridge; +}; + extern struct bootinfo bootinfo; =20 extern domid_t max_init_domid; @@ -124,6 +134,9 @@ void device_tree_get_reg(const __be32 **cell, u32 addre= ss_cells, u32 device_tree_get_u32(const void *fdt, int node, const char *prop_name, u32 dflt); =20 +int map_range_to_domain(const struct dt_device_node *dev, + u64 addr, u64 len, void *data); + #endif /* * Local variables: --=20 2.25.1 From nobody Fri Nov 29 16:32:51 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; 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charset="utf-8" From: Oleksandr Andrushchenko vPCI may map and unmap PCI device memory (BARs) being passed through which may take a lot of time. For this those operations may be deferred to be performed later, so that they can be safely preempted. Run the corresponding vPCI code while switching a vCPU. Signed-off-by: Oleksandr Andrushchenko --- Since v1: - Moved the check for pending vpci work from the common IOREQ code to hvm_do_resume on x86 - Re-worked the code for Arm to ensure we don't miss pending vPCI work --- xen/arch/arm/traps.c | 13 +++++++++++++ xen/arch/x86/hvm/hvm.c | 6 ++++++ xen/common/ioreq.c | 9 --------- 3 files changed, 19 insertions(+), 9 deletions(-) diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c index 219ab3c3fbde..b246f51086e3 100644 --- a/xen/arch/arm/traps.c +++ b/xen/arch/arm/traps.c @@ -34,6 +34,7 @@ #include #include #include +#include =20 #include #include @@ -2304,6 +2305,18 @@ static bool check_for_vcpu_work(void) } #endif =20 + if ( has_vpci(v->domain) ) + { + bool pending; + + local_irq_enable(); + pending =3D vpci_process_pending(v); + local_irq_disable(); + + if ( pending ) + return true; + } + if ( likely(!v->arch.need_flush_to_ram) ) return false; =20 diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c index 7b48a1b925bb..d32f5d572941 100644 --- a/xen/arch/x86/hvm/hvm.c +++ b/xen/arch/x86/hvm/hvm.c @@ -549,6 +549,12 @@ void hvm_do_resume(struct vcpu *v) if ( !vcpu_ioreq_handle_completion(v) ) return; =20 + if ( has_vpci(v->domain) && vpci_process_pending(v) ) + { + raise_softirq(SCHEDULE_SOFTIRQ); + return; + } + if ( unlikely(v->arch.vm_event) ) hvm_vm_event_do_resume(v); =20 diff --git a/xen/common/ioreq.c b/xen/common/ioreq.c index d732dc045df9..689d256544c8 100644 --- a/xen/common/ioreq.c +++ b/xen/common/ioreq.c @@ -25,9 +25,7 @@ #include #include #include -#include #include -#include =20 #include #include @@ -212,19 +210,12 @@ static bool wait_for_io(struct ioreq_vcpu *sv, ioreq_= t *p) =20 bool vcpu_ioreq_handle_completion(struct vcpu *v) { - struct domain *d =3D v->domain; struct vcpu_io *vio =3D &v->io; struct ioreq_server *s; struct ioreq_vcpu *sv; enum vio_completion completion; bool res =3D true; =20 - if ( has_vpci(d) && vpci_process_pending(v) ) - { - raise_softirq(SCHEDULE_SOFTIRQ); - return false; - } - while ( (sv =3D get_pending_vcpu(v, &s)) !=3D NULL ) if ( !wait_for_io(sv, get_ioreq(s, v)) ) return false; --=20 2.25.1