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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [XEN][PATCH v12 03/20] xen/arm/device: Remove __init from function type
Remove __init from following function to access during runtime:
1. map_irq_to_domain()
2. handle_device_interrupts()
3. map_range_to_domain()
4. unflatten_dt_node()
5. handle_device()
6. map_device_children()
7. map_dt_irq_to_domain()
Move map_irq_to_domain() prototype from domain_build.h to setup.h.
Above changes will create an error on build as non-init function are still
in domain_build.c file. So, to avoid build fails, following changes are done:
1. Move map_irq_to_domain(), handle_device_interrupts(), map_range_to_domain(),
handle_device(), map_device_children() and map_dt_irq_to_domain()
to device.c. After removing __init type, these functions are not specific
to domain building, so moving them out of domain_build.c to device.c.
2. Remove static type from handle_device_interrupts().
Also, renamed handle_device_interrupts() to map_device_irqs_to_domain().
Overall, these changes are done to support the dynamic programming of a nodes
where an overlay node will be added to fdt and unflattened node will be added to
dt_host. Furthermore, IRQ and mmio mapping will be done for the added node.
Signed-off-by: Vikram Garhwal <vikram.garhwal@xxxxxxx>
Reviewed-by: Michal Orzel <michal.orzel@xxxxxxx>
Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
Changes from v10:
Remove unnecessary rangeset variables from handle_device() declaration.
Rename handle_device_interrupts() to map_device_irqs_to_domain().
Fix code styles.
Changes from v9:
Move handle_device(), map_device_children() and map_dt_irq_to_domain() out
of domain_build.c
---
---
xen/arch/arm/device.c | 294 +++++++++++++++++++++++
xen/arch/arm/domain_build.c | 295 +-----------------------
xen/arch/arm/include/asm/domain_build.h | 2 -
xen/arch/arm/include/asm/setup.h | 9 +
xen/common/device_tree.c | 12 +-
5 files changed, 310 insertions(+), 302 deletions(-)
diff --git a/xen/arch/arm/device.c b/xen/arch/arm/device.c
index ca8539dee5..327e4d24fb 100644
--- a/xen/arch/arm/device.c
+++ b/xen/arch/arm/device.c
@@ -9,8 +9,10 @@
*/
#include <asm/device.h>
+#include <asm/setup.h>
#include <xen/errno.h>
#include <xen/init.h>
+#include <xen/iocap.h>
#include <xen/lib.h>
extern const struct device_desc _sdevice[], _edevice[];
@@ -75,6 +77,298 @@ enum device_class device_get_class(const struct
dt_device_node *dev)
return DEVICE_UNKNOWN;
}
+int map_irq_to_domain(struct domain *d, unsigned int irq,
+ bool need_mapping, const char *devname)
+{
+ int res;
+
+ res = irq_permit_access(d, irq);
+ if ( res )
+ {
+ printk(XENLOG_ERR "Unable to permit to %pd access to IRQ %u\n", d,
irq);
+ return res;
+ }
+
+ if ( need_mapping )
+ {
+ /*
+ * Checking the return of vgic_reserve_virq is not
+ * necessary. It should not fail except when we try to map
+ * the IRQ twice. This can legitimately happen if the IRQ is shared
+ */
+ vgic_reserve_virq(d, irq);
+
+ res = route_irq_to_guest(d, irq, irq, devname);
+ if ( res < 0 )
+ {
+ printk(XENLOG_ERR "Unable to map IRQ%u to %pd\n", irq, d);
+ return res;
+ }
+ }
+
+ dt_dprintk(" - IRQ: %u\n", irq);
+ return 0;
+}
+
+int map_range_to_domain(const struct dt_device_node *dev,
+ uint64_t addr, uint64_t len, void *data)
+{
+ struct map_range_data *mr_data = data;
+ struct domain *d = mr_data->d;
+ int res;
+
+ if ( (addr != (paddr_t)addr) || (((paddr_t)~0 - addr) < len) )
+ {
+ printk(XENLOG_ERR "%s: [0x%"PRIx64", 0x%"PRIx64"] exceeds the maximum
allowed PA width (%u bits)",
+ dt_node_full_name(dev), addr, (addr + len), PADDR_BITS);
+ return -ERANGE;
+ }
+
+ /*
+ * reserved-memory regions are RAM carved out for a special purpose.
+ * They are not MMIO and therefore a domain should not be able to
+ * manage them via the IOMEM interface.
+ */
+ if ( strncasecmp(dt_node_full_name(dev), "/reserved-memory/",
+ strlen("/reserved-memory/")) != 0 )
+ {
+ res = iomem_permit_access(d, paddr_to_pfn(addr),
+ paddr_to_pfn(PAGE_ALIGN(addr + len - 1)));
+ if ( res )
+ {
+ printk(XENLOG_ERR "Unable to permit to dom%d access to"
+ " 0x%"PRIx64" - 0x%"PRIx64"\n",
+ d->domain_id,
+ addr & PAGE_MASK, PAGE_ALIGN(addr + len) - 1);
+ return res;
+ }
+ }
+
+ if ( !mr_data->skip_mapping )
+ {
+ res = map_regions_p2mt(d,
+ gaddr_to_gfn(addr),
+ PFN_UP(len),
+ maddr_to_mfn(addr),
+ mr_data->p2mt);
+
+ if ( res < 0 )
+ {
+ printk(XENLOG_ERR "Unable to map 0x%"PRIx64
+ " - 0x%"PRIx64" in domain %d\n",
+ addr & PAGE_MASK, PAGE_ALIGN(addr + len) - 1,
+ d->domain_id);
+ return res;
+ }
+ }
+
+ dt_dprintk(" - MMIO: %010"PRIx64" - %010"PRIx64" P2MType=%x\n",
+ addr, addr + len, mr_data->p2mt);
+
+ return 0;
+}
+
+/*
+ * map_device_irqs_to_domain retrieves the interrupts configuration from
+ * a device tree node and maps those interrupts to the target domain.
+ *
+ * Returns:
+ * < 0 error
+ * 0 success
+ */
+int map_device_irqs_to_domain(struct domain *d,
+ struct dt_device_node *dev,
+ bool need_mapping)
+{
+ unsigned int i, nirq;
+ int res;
+ struct dt_raw_irq rirq;
+
+ nirq = dt_number_of_irq(dev);
+
+ /* Give permission and map IRQs */
+ for ( i = 0; i < nirq; i++ )
+ {
+ res = dt_device_get_raw_irq(dev, i, &rirq);
+ if ( res )
+ {
+ printk(XENLOG_ERR "Unable to retrieve irq %u for %s\n",
+ i, dt_node_full_name(dev));
+ return res;
+ }
+
+ /*
+ * Don't map IRQ that have no physical meaning
+ * ie: IRQ whose controller is not the GIC
+ */
+ if ( rirq.controller != dt_interrupt_controller )
+ {
+ dt_dprintk("irq %u not connected to primary controller. Connected
to %s\n",
+ i, dt_node_full_name(rirq.controller));
+ continue;
+ }
+
+ res = platform_get_irq(dev, i);
+ if ( res < 0 )
+ {
+ printk(XENLOG_ERR "Unable to get irq %u for %s\n",
+ i, dt_node_full_name(dev));
+ return res;
+ }
+
+ res = map_irq_to_domain(d, res, need_mapping, dt_node_name(dev));
+ if ( res )
+ return res;
+ }
+
+ return 0;
+}
+
+static int map_dt_irq_to_domain(const struct dt_device_node *dev,
+ const struct dt_irq *dt_irq,
+ void *data)
+{
+ struct map_range_data *mr_data = data;
+ struct domain *d = mr_data->d;
+ unsigned int irq = dt_irq->irq;
+ int res;
+
+ if ( irq < NR_LOCAL_IRQS )
+ {
+ printk(XENLOG_ERR "%s: IRQ%u is not a SPI\n", dt_node_name(dev), irq);
+ return -EINVAL;
+ }
+
+ /* Setup the IRQ type */
+ res = irq_set_spi_type(irq, dt_irq->type);
+ if ( res )
+ {
+ printk(XENLOG_ERR "%s: Unable to setup IRQ%u to %pd\n",
+ dt_node_name(dev), irq, d);
+ return res;
+ }
+
+ res = map_irq_to_domain(d, irq, !mr_data->skip_mapping, dt_node_name(dev));
+
+ return res;
+}
+
+/*
+ * For a node which describes a discoverable bus (such as a PCI bus)
+ * then we may need to perform additional mappings in order to make
+ * the child resources available to domain 0.
+ */
+static int map_device_children(const struct dt_device_node *dev,
+ struct map_range_data *mr_data)
+{
+ if ( dt_device_type_is_equal(dev, "pci") )
+ {
+ int ret;
+
+ dt_dprintk("Mapping children of %s to guest\n",
+ dt_node_full_name(dev));
+
+ ret = dt_for_each_irq_map(dev, &map_dt_irq_to_domain, mr_data);
+ if ( ret < 0 )
+ return ret;
+
+ ret = dt_for_each_range(dev, &map_range_to_domain, mr_data);
+ if ( ret < 0 )
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ * For a given device node:
+ * - Give permission to the guest to manage IRQ and MMIO range
+ * - Retrieve the IRQ configuration (i.e edge/level) from device tree
+ * When the device is not marked for guest passthrough:
+ * - Try to call iommu_add_dt_device to protect the device by an IOMMU
+ * - Assign the device to the guest if it's protected by an IOMMU
+ * - Map the IRQs and iomem regions to DOM0
+ */
+int handle_device(struct domain *d, struct dt_device_node *dev, p2m_type_t
p2mt)
+{
+ unsigned int naddr;
+ unsigned int i;
+ int res;
+ paddr_t addr, size;
+ bool own_device = !dt_device_for_passthrough(dev);
+ /*
+ * We want to avoid mapping the MMIO in dom0 for the following cases:
+ * - The device is owned by dom0 (i.e. it has been flagged for
+ * passthrough).
+ * - PCI host bridges with driver in Xen. They will later be mapped by
+ * pci_host_bridge_mappings().
+ */
+ struct map_range_data mr_data = {
+ .d = d,
+ .p2mt = p2mt,
+ .skip_mapping = !own_device ||
+ (is_pci_passthrough_enabled() &&
+ (device_get_class(dev) == DEVICE_PCI_HOSTBRIDGE))
+ };
+
+ naddr = dt_number_of_address(dev);
+
+ dt_dprintk("%s passthrough = %d naddr = %u\n",
+ dt_node_full_name(dev), own_device, naddr);
+
+ if ( own_device )
+ {
+ dt_dprintk("Check if %s is behind the IOMMU and add it\n",
+ dt_node_full_name(dev));
+
+ res = iommu_add_dt_device(dev);
+ if ( res < 0 )
+ {
+ printk(XENLOG_ERR "Failed to add %s to the IOMMU\n",
+ dt_node_full_name(dev));
+ return res;
+ }
+
+ if ( dt_device_is_protected(dev) )
+ {
+ dt_dprintk("%s setup iommu\n", dt_node_full_name(dev));
+ res = iommu_assign_dt_device(d, dev);
+ if ( res )
+ {
+ printk(XENLOG_ERR "Failed to setup the IOMMU for %s\n",
+ dt_node_full_name(dev));
+ return res;
+ }
+ }
+ }
+
+ res = map_device_irqs_to_domain(d, dev, own_device);
+ if ( res < 0 )
+ return res;
+
+ /* Give permission and map MMIOs */
+ for ( i = 0; i < naddr; i++ )
+ {
+ res = dt_device_get_paddr(dev, i, &addr, &size);
+ if ( res )
+ {
+ printk(XENLOG_ERR "Unable to retrieve address %u for %s\n",
+ i, dt_node_full_name(dev));
+ return res;
+ }
+
+ res = map_range_to_domain(dev, addr, size, &mr_data);
+ if ( res )
+ return res;
+ }
+
+ res = map_device_children(dev, &mr_data);
+ if ( res )
+ return res;
+
+ return 0;
+}
+
/*
* Local variables:
* mode: C
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 54bf5623c8..ff4fc30769 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -2293,299 +2293,6 @@ int __init make_chosen_node(const struct kernel_info
*kinfo)
return res;
}
-int __init map_irq_to_domain(struct domain *d, unsigned int irq,
- bool need_mapping, const char *devname)
-{
- int res;
-
- res = irq_permit_access(d, irq);
- if ( res )
- {
- printk(XENLOG_ERR "Unable to permit to %pd access to IRQ %u\n", d,
irq);
- return res;
- }
-
- if ( need_mapping )
- {
- /*
- * Checking the return of vgic_reserve_virq is not
- * necessary. It should not fail except when we try to map
- * the IRQ twice. This can legitimately happen if the IRQ is shared
- */
- vgic_reserve_virq(d, irq);
-
- res = route_irq_to_guest(d, irq, irq, devname);
- if ( res < 0 )
- {
- printk(XENLOG_ERR "Unable to map IRQ%u to %pd\n", irq, d);
- return res;
- }
- }
-
- dt_dprintk(" - IRQ: %u\n", irq);
- return 0;
-}
-
-static int __init map_dt_irq_to_domain(const struct dt_device_node *dev,
- const struct dt_irq *dt_irq,
- void *data)
-{
- struct map_range_data *mr_data = data;
- struct domain *d = mr_data->d;
- unsigned int irq = dt_irq->irq;
- int res;
-
- if ( irq < NR_LOCAL_IRQS )
- {
- printk(XENLOG_ERR "%s: IRQ%u is not a SPI\n", dt_node_name(dev), irq);
- return -EINVAL;
- }
-
- /* Setup the IRQ type */
- res = irq_set_spi_type(irq, dt_irq->type);
- if ( res )
- {
- printk(XENLOG_ERR "%s: Unable to setup IRQ%u to %pd\n",
- dt_node_name(dev), irq, d);
- return res;
- }
-
- res = map_irq_to_domain(d, irq, !mr_data->skip_mapping, dt_node_name(dev));
-
- return res;
-}
-
-int __init map_range_to_domain(const struct dt_device_node *dev,
- uint64_t addr, uint64_t len, void *data)
-{
- struct map_range_data *mr_data = data;
- struct domain *d = mr_data->d;
- int res;
-
- if ( (addr != (paddr_t)addr) || (((paddr_t)~0 - addr) < len) )
- {
- printk(XENLOG_ERR "%s: [0x%"PRIx64", 0x%"PRIx64"] exceeds the maximum
allowed PA width (%u bits)",
- dt_node_full_name(dev), addr, (addr + len), PADDR_BITS);
- return -ERANGE;
- }
-
- /*
- * reserved-memory regions are RAM carved out for a special purpose.
- * They are not MMIO and therefore a domain should not be able to
- * manage them via the IOMEM interface.
- */
- if ( strncasecmp(dt_node_full_name(dev), "/reserved-memory/",
- strlen("/reserved-memory/")) != 0 )
- {
- res = iomem_permit_access(d, paddr_to_pfn(addr),
- paddr_to_pfn(PAGE_ALIGN(addr + len - 1)));
- if ( res )
- {
- printk(XENLOG_ERR "Unable to permit to dom%d access to"
- " 0x%"PRIx64" - 0x%"PRIx64"\n",
- d->domain_id,
- addr & PAGE_MASK, PAGE_ALIGN(addr + len) - 1);
- return res;
- }
- }
-
- if ( !mr_data->skip_mapping )
- {
- res = map_regions_p2mt(d,
- gaddr_to_gfn(addr),
- PFN_UP(len),
- maddr_to_mfn(addr),
- mr_data->p2mt);
-
- if ( res < 0 )
- {
- printk(XENLOG_ERR "Unable to map 0x%"PRIx64
- " - 0x%"PRIx64" in domain %d\n",
- addr & PAGE_MASK, PAGE_ALIGN(addr + len) - 1,
- d->domain_id);
- return res;
- }
- }
-
- dt_dprintk(" - MMIO: %010"PRIx64" - %010"PRIx64" P2MType=%x\n",
- addr, addr + len, mr_data->p2mt);
-
- return 0;
-}
-
-/*
- * For a node which describes a discoverable bus (such as a PCI bus)
- * then we may need to perform additional mappings in order to make
- * the child resources available to domain 0.
- */
-static int __init map_device_children(const struct dt_device_node *dev,
- struct map_range_data *mr_data)
-{
- if ( dt_device_type_is_equal(dev, "pci") )
- {
- int ret;
-
- dt_dprintk("Mapping children of %s to guest\n",
- dt_node_full_name(dev));
-
- ret = dt_for_each_irq_map(dev, &map_dt_irq_to_domain, mr_data);
- if ( ret < 0 )
- return ret;
-
- ret = dt_for_each_range(dev, &map_range_to_domain, mr_data);
- if ( ret < 0 )
- return ret;
- }
-
- return 0;
-}
-
-/*
- * handle_device_interrupts retrieves the interrupts configuration from
- * a device tree node and maps those interrupts to the target domain.
- *
- * Returns:
- * < 0 error
- * 0 success
- */
-static int __init handle_device_interrupts(struct domain *d,
- struct dt_device_node *dev,
- bool need_mapping)
-{
- unsigned int i, nirq;
- int res;
- struct dt_raw_irq rirq;
-
- nirq = dt_number_of_irq(dev);
-
- /* Give permission and map IRQs */
- for ( i = 0; i < nirq; i++ )
- {
- res = dt_device_get_raw_irq(dev, i, &rirq);
- if ( res )
- {
- printk(XENLOG_ERR "Unable to retrieve irq %u for %s\n",
- i, dt_node_full_name(dev));
- return res;
- }
-
- /*
- * Don't map IRQ that have no physical meaning
- * ie: IRQ whose controller is not the GIC
- */
- if ( rirq.controller != dt_interrupt_controller )
- {
- dt_dprintk("irq %u not connected to primary controller. Connected
to %s\n",
- i, dt_node_full_name(rirq.controller));
- continue;
- }
-
- res = platform_get_irq(dev, i);
- if ( res < 0 )
- {
- printk(XENLOG_ERR "Unable to get irq %u for %s\n",
- i, dt_node_full_name(dev));
- return res;
- }
-
- res = map_irq_to_domain(d, res, need_mapping, dt_node_name(dev));
- if ( res )
- return res;
- }
-
- return 0;
-}
-
-/*
- * For a given device node:
- * - Give permission to the guest to manage IRQ and MMIO range
- * - Retrieve the IRQ configuration (i.e edge/level) from device tree
- * When the device is not marked for guest passthrough:
- * - Try to call iommu_add_dt_device to protect the device by an IOMMU
- * - Assign the device to the guest if it's protected by an IOMMU
- * - Map the IRQs and iomem regions to DOM0
- */
-static int __init handle_device(struct domain *d, struct dt_device_node *dev,
- p2m_type_t p2mt)
-{
- unsigned int naddr;
- unsigned int i;
- int res;
- paddr_t addr, size;
- bool own_device = !dt_device_for_passthrough(dev);
- /*
- * We want to avoid mapping the MMIO in dom0 for the following cases:
- * - The device is owned by dom0 (i.e. it has been flagged for
- * passthrough).
- * - PCI host bridges with driver in Xen. They will later be mapped by
- * pci_host_bridge_mappings().
- */
- struct map_range_data mr_data = {
- .d = d,
- .p2mt = p2mt,
- .skip_mapping = !own_device ||
- (is_pci_passthrough_enabled() &&
- (device_get_class(dev) == DEVICE_PCI_HOSTBRIDGE))
- };
-
- naddr = dt_number_of_address(dev);
-
- dt_dprintk("%s passthrough = %d naddr = %u\n",
- dt_node_full_name(dev), own_device, naddr);
-
- if ( own_device )
- {
- dt_dprintk("Check if %s is behind the IOMMU and add it\n",
- dt_node_full_name(dev));
-
- res = iommu_add_dt_device(dev);
- if ( res < 0 )
- {
- printk(XENLOG_ERR "Failed to add %s to the IOMMU\n",
- dt_node_full_name(dev));
- return res;
- }
-
- if ( dt_device_is_protected(dev) )
- {
- dt_dprintk("%s setup iommu\n", dt_node_full_name(dev));
- res = iommu_assign_dt_device(d, dev);
- if ( res )
- {
- printk(XENLOG_ERR "Failed to setup the IOMMU for %s\n",
- dt_node_full_name(dev));
- return res;
- }
- }
- }
-
- res = handle_device_interrupts(d, dev, own_device);
- if ( res < 0 )
- return res;
-
- /* Give permission and map MMIOs */
- for ( i = 0; i < naddr; i++ )
- {
- res = dt_device_get_paddr(dev, i, &addr, &size);
- if ( res )
- {
- printk(XENLOG_ERR "Unable to retrieve address %u for %s\n",
- i, dt_node_full_name(dev));
- return res;
- }
-
- res = map_range_to_domain(dev, addr, size, &mr_data);
- if ( res )
- return res;
- }
-
- res = map_device_children(dev, &mr_data);
- if ( res )
- return res;
-
- return 0;
-}
-
static int __init handle_node(struct domain *d, struct kernel_info *kinfo,
struct dt_device_node *node,
p2m_type_t p2mt)
@@ -3038,7 +2745,7 @@ static int __init handle_passthrough_prop(struct
kernel_info *kinfo,
return -EINVAL;
}
- res = handle_device_interrupts(kinfo->d, node, true);
+ res = map_device_irqs_to_domain(kinfo->d, node, true);
if ( res < 0 )
return res;
diff --git a/xen/arch/arm/include/asm/domain_build.h
b/xen/arch/arm/include/asm/domain_build.h
index 34ceddc995..b9329c9ee0 100644
--- a/xen/arch/arm/include/asm/domain_build.h
+++ b/xen/arch/arm/include/asm/domain_build.h
@@ -4,8 +4,6 @@
#include <xen/sched.h>
#include <asm/kernel.h>
-int map_irq_to_domain(struct domain *d, unsigned int irq,
- bool need_mapping, const char *devname);
int make_chosen_node(const struct kernel_info *kinfo);
void evtchn_allocate(struct domain *d);
diff --git a/xen/arch/arm/include/asm/setup.h b/xen/arch/arm/include/asm/setup.h
index 19dc637d55..6cda3e4039 100644
--- a/xen/arch/arm/include/asm/setup.h
+++ b/xen/arch/arm/include/asm/setup.h
@@ -165,6 +165,15 @@ void device_tree_get_reg(const __be32 **cell, uint32_t
address_cells,
u32 device_tree_get_u32(const void *fdt, int node,
const char *prop_name, u32 dflt);
+int handle_device(struct domain *d, struct dt_device_node *dev,
+ p2m_type_t p2mt);
+
+int map_device_irqs_to_domain(struct domain *d, struct dt_device_node *dev,
+ bool need_mapping);
+
+int map_irq_to_domain(struct domain *d, unsigned int irq,
+ bool need_mapping, const char *devname);
+
int map_range_to_domain(const struct dt_device_node *dev,
uint64_t addr, uint64_t len, void *data);
diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c
index b6d9f018c6..fccf98f94e 100644
--- a/xen/common/device_tree.c
+++ b/xen/common/device_tree.c
@@ -1847,12 +1847,12 @@ int dt_count_phandle_with_args(const struct
dt_device_node *np,
* @allnextpp: pointer to ->allnext from last allocated device_node
* @fpsize: Size of the node path up at the current depth.
*/
-static unsigned long __init unflatten_dt_node(const void *fdt,
- unsigned long mem,
- unsigned long *p,
- struct dt_device_node *dad,
- struct dt_device_node
***allnextpp,
- unsigned long fpsize)
+static unsigned long unflatten_dt_node(const void *fdt,
+ unsigned long mem,
+ unsigned long *p,
+ struct dt_device_node *dad,
+ struct dt_device_node ***allnextpp,
+ unsigned long fpsize)
{
struct dt_device_node *np;
struct dt_property *pp, **prev_pp = NULL;
--
2.17.1
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