On x86, calling inb/outb special instructions (used in UIO ioport
read/write parts) is only possible if the right IO permissions has been
granted.
The only user of this API (the net/virtio pmd) checks this
unconditionnaly but this should be hidden by the rte_pci_ioport API
itself and only checked when the device is bound to a UIO driver.
Signed-off-by: David Marchand <david.march...@redhat.com>
---
Changelog since v2:
- do not switch to pci_ioport_map in igb_uio case, add a check on iopl
there too,
Changelog since v1:
- change log message level from DEBUG to ERR,
- add device name in log message,
---
drivers/bus/pci/bsd/pci.c | 5 +++++
drivers/bus/pci/linux/pci.c | 6 ++++++
drivers/bus/pci/linux/pci_uio.c | 6 ++++++
3 files changed, 17 insertions(+)
diff --git a/drivers/bus/pci/bsd/pci.c b/drivers/bus/pci/bsd/pci.c
index 7777179..ebbfeb1 100644
--- a/drivers/bus/pci/bsd/pci.c
+++ b/drivers/bus/pci/bsd/pci.c
@@ -539,6 +539,11 @@ rte_pci_ioport_map(struct rte_pci_device *dev, int bar,
switch (dev->kdrv) {
#if defined(RTE_ARCH_X86)
case RTE_KDRV_NIC_UIO:
+ if (rte_eal_iopl_init() != 0) {
+ RTE_LOG(ERR, EAL, "%s(): insufficient ioport
permissions for PCI device %s\n",
+ __func__, dev->name);
+ return -1;
+ }
if ((uintptr_t) dev->mem_resource[bar].addr <= UINT16_MAX) {
p->base = (uintptr_t)dev->mem_resource[bar].addr;
ret = 0;
diff --git a/drivers/bus/pci/linux/pci.c b/drivers/bus/pci/linux/pci.c
index 318db19..740a2cd 100644
--- a/drivers/bus/pci/linux/pci.c
+++ b/drivers/bus/pci/linux/pci.c
@@ -657,6 +657,12 @@ pci_ioport_map(struct rte_pci_device *dev, int bar
__rte_unused,
int found = 0;
size_t linesz;
+ if (rte_eal_iopl_init() != 0) {
+ RTE_LOG(ERR, EAL, "%s(): insufficient ioport permissions for
PCI device %s\n",
+ __func__, dev->name);
+ return -1;
+ }
+
snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT,
dev->addr.domain, dev->addr.bus,
dev->addr.devid, dev->addr.function);
diff --git a/drivers/bus/pci/linux/pci_uio.c b/drivers/bus/pci/linux/pci_uio.c
index e031361..6dca05a 100644
--- a/drivers/bus/pci/linux/pci_uio.c
+++ b/drivers/bus/pci/linux/pci_uio.c
@@ -375,6 +375,12 @@ pci_uio_ioport_map(struct rte_pci_device *dev, int bar,
int uio_num;
unsigned long start;
+ if (rte_eal_iopl_init() != 0) {
+ RTE_LOG(ERR, EAL, "%s(): insufficient ioport permissions for
PCI device %s\n",
+ __func__, dev->name);
+ return -1;
+ }
+
uio_num = pci_get_uio_dev(dev, dirname, sizeof(dirname), 0);
if (uio_num < 0)
return -1;
--
1.8.3.1
