diff options
| author | Andrzej Kacprowski <Andrzej.Kacprowski@intel.com> | 2024-10-17 16:49:58 +0200 |
|---|---|---|
| committer | Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> | 2024-10-30 10:17:00 +0100 |
| commit | 72f7e16eccddde99386a10eb2d08833e805917c6 (patch) | |
| tree | 7031d963424d45507456fc0d0e79548f5cf441f5 /drivers/accel | |
| parent | 746ae46c11137ba21f0c0c68f082a9d8c1222c78 (diff) | |
accel/ivpu: Fix NOC firewall interrupt handling
The NOC firewall interrupt means that the HW prevented
unauthorized access to a protected resource, so there
is no need to trigger device reset in such case.
To facilitate security testing add firewall_irq_counter
debugfs file that tracks firewall interrupts.
Fixes: 8a27ad81f7d3 ("accel/ivpu: Split IP and buttress code")
Cc: stable@vger.kernel.org # v6.11+
Signed-off-by: Andrzej Kacprowski <Andrzej.Kacprowski@intel.com>
Reviewed-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241017144958.79327-1-jacek.lawrynowicz@linux.intel.com
Diffstat (limited to 'drivers/accel')
| -rw-r--r-- | drivers/accel/ivpu/ivpu_debugfs.c | 9 | ||||
| -rw-r--r-- | drivers/accel/ivpu/ivpu_hw.c | 1 | ||||
| -rw-r--r-- | drivers/accel/ivpu/ivpu_hw.h | 1 | ||||
| -rw-r--r-- | drivers/accel/ivpu/ivpu_hw_ip.c | 5 |
4 files changed, 15 insertions, 1 deletions
diff --git a/drivers/accel/ivpu/ivpu_debugfs.c b/drivers/accel/ivpu/ivpu_debugfs.c index 6f86f8df30db..8d50981594d1 100644 --- a/drivers/accel/ivpu/ivpu_debugfs.c +++ b/drivers/accel/ivpu/ivpu_debugfs.c @@ -108,6 +108,14 @@ static int reset_pending_show(struct seq_file *s, void *v) return 0; } +static int firewall_irq_counter_show(struct seq_file *s, void *v) +{ + struct ivpu_device *vdev = seq_to_ivpu(s); + + seq_printf(s, "%d\n", atomic_read(&vdev->hw->firewall_irq_counter)); + return 0; +} + static const struct drm_debugfs_info vdev_debugfs_list[] = { {"bo_list", bo_list_show, 0}, {"fw_name", fw_name_show, 0}, @@ -116,6 +124,7 @@ static const struct drm_debugfs_info vdev_debugfs_list[] = { {"last_bootmode", last_bootmode_show, 0}, {"reset_counter", reset_counter_show, 0}, {"reset_pending", reset_pending_show, 0}, + {"firewall_irq_counter", firewall_irq_counter_show, 0}, }; static ssize_t diff --git a/drivers/accel/ivpu/ivpu_hw.c b/drivers/accel/ivpu/ivpu_hw.c index 27f0fe4d54e0..e69c0613513f 100644 --- a/drivers/accel/ivpu/ivpu_hw.c +++ b/drivers/accel/ivpu/ivpu_hw.c @@ -249,6 +249,7 @@ int ivpu_hw_init(struct ivpu_device *vdev) platform_init(vdev); wa_init(vdev); timeouts_init(vdev); + atomic_set(&vdev->hw->firewall_irq_counter, 0); return 0; } diff --git a/drivers/accel/ivpu/ivpu_hw.h b/drivers/accel/ivpu/ivpu_hw.h index 1c0c98e3afb8..a96a05b2acda 100644 --- a/drivers/accel/ivpu/ivpu_hw.h +++ b/drivers/accel/ivpu/ivpu_hw.h @@ -52,6 +52,7 @@ struct ivpu_hw_info { int dma_bits; ktime_t d0i3_entry_host_ts; u64 d0i3_entry_vpu_ts; + atomic_t firewall_irq_counter; }; int ivpu_hw_init(struct ivpu_device *vdev); diff --git a/drivers/accel/ivpu/ivpu_hw_ip.c b/drivers/accel/ivpu/ivpu_hw_ip.c index dfd2f4a5b526..60b33fc59d96 100644 --- a/drivers/accel/ivpu/ivpu_hw_ip.c +++ b/drivers/accel/ivpu/ivpu_hw_ip.c @@ -1062,7 +1062,10 @@ static void irq_wdt_mss_handler(struct ivpu_device *vdev) static void irq_noc_firewall_handler(struct ivpu_device *vdev) { - ivpu_pm_trigger_recovery(vdev, "NOC Firewall IRQ"); + atomic_inc(&vdev->hw->firewall_irq_counter); + + ivpu_dbg(vdev, IRQ, "NOC Firewall interrupt detected, counter %d\n", + atomic_read(&vdev->hw->firewall_irq_counter)); } /* Handler for IRQs from NPU core */ |