diff options
| author | Nick Hudson <skrll@netbsd.org> | 2022-02-12 09:44:17 +0000 |
|---|---|---|
| committer | Jason Wang <jasowang@redhat.com> | 2022-02-14 11:50:44 +0800 |
| commit | 870374214e4cc122f086f55732f1b17ec320132e (patch) | |
| tree | 1a42e7f7654337dcc5e1c26f46bb850444f2376e /hw/net | |
| parent | 611382968069f54914e3cfff30f2a3b92c6219cd (diff) | |
hw/net: e1000e: Clear ICR on read when using non MSI-X interrupts
In section 7.4.3 of the 82574 datasheet it states that
"In systems that do not support MSI-X, reading the ICR
register clears it's bits..."
Some OSes rely on this.
Signed-off-by: Nick Hudson <skrll@netbsd.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'hw/net')
| -rw-r--r-- | hw/net/e1000e_core.c | 5 | ||||
| -rw-r--r-- | hw/net/trace-events | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/hw/net/e1000e_core.c b/hw/net/e1000e_core.c index 8ae6fb7e14..2c51089a82 100644 --- a/hw/net/e1000e_core.c +++ b/hw/net/e1000e_core.c @@ -2607,6 +2607,11 @@ e1000e_mac_icr_read(E1000ECore *core, int index) core->mac[ICR] = 0; } + if (!msix_enabled(core->owner)) { + trace_e1000e_irq_icr_clear_nonmsix_icr_read(); + core->mac[ICR] = 0; + } + if ((core->mac[ICR] & E1000_ICR_ASSERTED) && (core->mac[CTRL_EXT] & E1000_CTRL_EXT_IAME)) { trace_e1000e_irq_icr_clear_iame(); diff --git a/hw/net/trace-events b/hw/net/trace-events index 643338f610..4c0ec3fda1 100644 --- a/hw/net/trace-events +++ b/hw/net/trace-events @@ -221,6 +221,7 @@ e1000e_irq_write_ics(uint32_t val) "Adding ICR bits 0x%x" e1000e_irq_icr_process_iame(void) "Clearing IMS bits due to IAME" e1000e_irq_read_ics(uint32_t ics) "Current ICS: 0x%x" e1000e_irq_read_ims(uint32_t ims) "Current IMS: 0x%x" +e1000e_irq_icr_clear_nonmsix_icr_read(void) "Clearing ICR on read due to non MSI-X int" e1000e_irq_icr_read_entry(uint32_t icr) "Starting ICR read. Current ICR: 0x%x" e1000e_irq_icr_read_exit(uint32_t icr) "Ending ICR read. Current ICR: 0x%x" e1000e_irq_icr_clear_zero_ims(void) "Clearing ICR on read due to zero IMS" |