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qemu-e2k/hw
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Jason Wang 1001cf45a7 e1000: indicate dropped packets in HW counters 
The e1000 emulation silently discards RX packets if there's
insufficient space in the ring buffer. This leads to errors
on higher-level protocols in the guest, with no indication
about the error cause.

This patch increments the "Missed Packets Count" (MPC) and
"Receive No Buffers Count" (RNBC) HW counters in this case.
As the emulation has no FIFO for buffering packets that can't
immediately be pushed to the guest, these two registers are
practically equivalent (see 10.2.7.4, 10.2.7.33 in
https://www.intel.com/content/www/us/en/embedded/products/networking/82574l-gbe-controller-datasheet.html).

On a Linux guest, the register content  will be reflected in
the "rx_missed_errors" and "rx_no_buffer_count" stats from
"ethtool -S", and in the "missed" stat from "ip -s -s link show",
giving at least some hint about the error cause inside the guest.

If the cause is known, problems like this can often be avoided
easily, by increasing the number of RX descriptors in the guest
e1000 driver (e.g under Linux, "e1000.RxDescriptors=1024").

The patch also adds a qemu trace message for this condition.

Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
 		2018-10-19 11:15:04 +08:00
..
9pfs 9p: darwin: Explicitly cast comparisons of mode_t with -1 2018-06-29 12:32:10 +02:00
acpi pci, pc, virtio: fixes, features 2018-09-24 18:49:11 +01:00
adc Include qapi/error.h exactly where needed 2018-02-09 13:50:17 +01:00
alpha change get_image_size return type to int64_t 2018-10-02 19:08:49 +02:00
arm hw/arm/virt: add DT property /secure-chosen/stdout-path indicating secure UART 2018-10-16 16:15:01 +01:00
audio es1370: fix ADC_FRAMEADR and ADC_FRAMECNT 2018-10-02 18:47:55 +02:00
block block: Remove deprecated -drive option serial 2018-08-15 12:50:39 +02:00
bt hw/bt: Replace fprintf(stderr, "*\n" with error_report() 2018-01-22 09:51:00 +01:00
char chardev: mark the calls that allow an implicit mux monitor 2018-10-03 14:45:05 +04:00
core hw/core/generic-loader: Compile only once, not for each target 2018-10-17 08:45:37 +02:00
cpu hw/cpu/a15mpcore: If CPU has EL2, enable it on the GIC and wire it up 2018-08-24 13:17:34 +01:00
cris hw/cris: Use the IEC binary prefix definitions 2018-07-02 15:41:15 +02:00
display hw/display/cirrus_vga: Move "isa-cirrus-vga" device into a separate file 2018-10-15 09:57:33 +02:00
dma hw/dma/pl080: Remove hw_error() if DMA is enabled 2018-08-20 11:24:33 +01:00
gpio hw/i2c: Use DeviceClass::realize instead of I2CSlaveClass::init 2018-06-01 15:14:31 +02:00
hppa change get_image_size return type to int64_t 2018-10-02 19:08:49 +02:00
i2c i2c: switch ddc to use the new edid generator 2018-10-15 09:57:33 +02:00
i386 kvmclock: run KVM_KVMCLOCK_CTRL ioctl in vcpu thread 2018-10-02 19:09:13 +02:00
ide replay: replay BH for IDE trim operation 2018-10-02 19:09:13 +02:00
input ps2: prevent changing irq state on save and load 2018-10-02 18:47:55 +02:00
intc hw/intc/arm_gic: Drop GIC_BASE_IRQ macro 2018-09-25 15:13:24 +01:00
ipack hw/ipack: Use the IEC binary prefix definitions 2018-07-02 15:41:12 +02:00
ipmi ipmi: Use proper struct reference for BT vmstate 2018-08-23 18:46:25 +02:00
isa i2c: pm_smbus: Add the ability to force block transfer enable 2018-08-23 18:46:25 +02:00
lm32 hw/lm32: Use the IEC binary prefix definitions 2018-07-02 15:41:15 +02:00
m68k hw/m68k: Use the IEC binary prefix definitions 2018-07-02 15:41:14 +02:00
mem pc-dimm: assign and verify the "addr" property during pre_plug 2018-08-23 18:46:25 +02:00
microblaze hw/microblaze/xlnx-zynqmp-pmu: Fix introspection problem in 'xlnx, zynqmp-pmu-soc' 2018-07-23 15:21:25 +01:00
mips change get_image_size return type to int64_t 2018-10-02 19:08:49 +02:00
misc ivshmem: Fix unplug of device "ivshmem-plain" 2018-10-10 08:01:36 +02:00
moxie change get_image_size return type to int64_t 2018-10-02 19:08:49 +02:00
net e1000: indicate dropped packets in HW counters 2018-10-19 11:15:04 +08:00
nios2 hw/nios2: Use the IEC binary prefix definitions 2018-07-02 15:41:15 +02:00
nvram hw/nvram/fw_cfg: Use memberwise copy of MemoryRegionOps struct 2018-10-02 19:09:14 +02:00
openrisc Change references to serial_hds[] to serial_hd() 2018-04-26 13:57:00 +01:00
pci qmp, hmp: make subsystem/system-vendor identities optional 2018-10-11 19:58:26 +01:00
pci-bridge hw/pci: add PCI resource reserve capability to legacy PCI bridge 2018-09-07 17:05:18 -04:00
pci-host ppc patch queue 2018-09-25 2018-09-25 13:30:45 +01:00
pcmcia hw: Clean up includes 2016-01-29 15:07:25 +00:00
ppc ppc patch queue 2018-09-25 2018-09-25 13:30:45 +01:00
rdma config: split PVRDMA from RDMA 2018-08-18 18:01:34 +03:00
riscv Error reporting & miscellaneous patches for 2018-09-24 2018-09-25 11:37:39 +01:00
s390x hw/s390x: Include the tod-qemu also for builds with --disable-tcg 2018-10-12 11:32:19 +02:00
scsi hw/scsi/mptendian: Avoid taking address of fields in packed structs 2018-10-02 19:09:14 +02:00
sd sdhci: add i.MX SD Stable Clock bit 2018-08-20 11:24:32 +01:00
sh4 hw/sh4: Use the IEC binary prefix definitions 2018-07-02 15:41:15 +02:00
smbios hw/smbios: Use the IEC binary prefix definitions 2018-07-02 15:41:12 +02:00
sparc sun4m: don't use legacy fw_cfg_init_mem() function 2018-08-20 19:18:31 +01:00
sparc64 sun4u: implement custom FWPathProvider 2018-09-14 09:18:11 +01:00
ssi aspeed/smc: fix some alignment issues 2018-09-25 15:13:24 +01:00
timer aspeed/timer: fix compile breakage with clang 3.4.2 2018-09-25 15:13:24 +01:00
tpm tpm: extend TPM TIS with state migration support 2018-05-24 12:07:04 -04:00
tricore hw/tricore: Use the IEC binary prefix definitions 2018-07-02 15:41:14 +02:00
unicore32 hw/input/i8042: Extract declarations from i386/pc.h into input/i8042.h 2018-03-12 16:12:48 +01:00
usb ohci: set effectively usb frame rate to 1kHz 2018-10-01 10:49:54 +02:00
vfio vfio-pci: make vfio-pci device more QOM conventional 2018-10-15 11:22:29 -06:00
virtio clean up callback when del virtqueue 2018-10-19 11:15:03 +08:00
watchdog qapi: Drop qapi_event_send_FOO()'s Error ** argument 2018-08-28 18:21:38 +02:00
xen xen: Don't use memory_region_init_ram_nomigrate() in pci_assign_dev_load_option_rom() 2018-06-22 13:28:42 +01:00
xenpv hw/xen: Use the IEC binary prefix definitions 2018-07-02 15:41:13 +02:00
xtensa hw/xtensa: Use the IEC binary prefix definitions 2018-07-02 15:41:14 +02:00
Makefile.objs hw: allow compiling out SCSI 2018-06-01 15:14:31 +02:00