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qemu-e2k/include/hw
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Alex Williamson 727b48661f pci: Sync PCIe downstream port LNKSTA on read 
The PCIe link speed and width between a downstream device and its
upstream port is negotiated on real hardware and susceptible to
dynamic changes due to signal issues and power management.  In the
emulated device case there is no real hardware link, but we still
might wish to have some consistency between endpoint and downstream
port via a virtual negotiation.  There is of course a real link for
assigned devices and this same virtual negotiation allows the
downstream port to match the endpoint, synchronizing on every read
to support underlying physical hardware dynamically adjusting the
link.

This negotiation is intentionally unidirectional for compatibility.
If the endpoint exceeds the capabilities of the downstream port or
there is no endpoint device, the downstream port reports negotiation
to its maximum speed and width, matching the previous case where
negotiation was absent.  De-tuning the endpoint to match a virtual
link doesn't seem to benefit anyone and is a condition we've thus
far reported without functional issues.

Note that PCI_EXP_LNKSTA is already ignored for migration
compatibility via pcie_cap_v1_fill().

Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Tested-by: Geoffrey McRae <geoff@hostfission.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 		2018-12-19 16:48:16 -05:00
..
acpi qom: make interface types abstract 2018-12-11 15:45:22 -02:00
adc STM32F2xx: Add the ADC device 2016-10-04 13:28:07 +01:00
arm hw/arm: versal: Correct the nr of IRQs to 192 2018-12-13 13:48:04 +00:00
audio audio: use TYPE_MV88W8618_AUDIO instead of hardcoded string 2018-10-29 13:50:15 +01:00
block block: Remove deprecated -drive option serial 2018-08-15 12:50:39 +02:00
char hw/char: Implement nRF51 SoC UART 2018-11-02 14:03:33 +00:00
core hw/core/split-irq: Device that splits IRQ lines 2018-03-02 11:03:45 +00:00
cpu hw: remove "qemu/osdep.h" from header files 2017-12-18 17:07:02 +03:00
cris char: rename CharDriverState Chardev 2017-01-27 18:07:59 +01:00
display edid: fix vendor default 2018-10-05 11:26:56 +02:00
dma hw/dma/pl080: Don't use CPU address space for DMA accesses 2018-08-20 11:24:33 +01:00
firmware hw/smbios: Move to the hw/firmware/ subdirectory 2018-12-19 16:48:16 -05:00
gpio bcm2835_gpio: add bcm2835 gpio controller 2017-02-28 17:10:00 +00:00
hyperv hyperv: process POST_MESSAGE hypercall 2018-10-19 13:44:14 +02:00
i2c i2c: Move typedef of bitbang_i2c_interface to i2c.h 2018-12-12 10:01:13 +01:00
i386 q35/440fx/arm/spapr: Add QEMU 4.0 machine type 2018-12-11 15:45:22 -02:00
ide ide: introduce ide_transfer_start_norecurse 2018-06-08 13:36:31 -04:00
input adb: add property to disable direct reg 3 writes 2018-06-16 16:32:33 +10:00
intc qom: make interface types abstract 2018-12-11 15:45:22 -02:00
ipack ipack: Update e-mail address 2016-05-18 15:04:27 +03:00
ipmi qom: make interface types abstract 2018-12-11 15:45:22 -02:00
isa qom: make interface types abstract 2018-12-11 15:45:22 -02:00
kvm hw: move headers to include/ 2013-04-08 18:13:10 +02:00
lm32 intc: make HMP 'info irq' and 'info pic' commands use InterruptStatsProvider interface 2016-10-04 10:00:25 +02:00
m68k hw/char/mcf_uart: QOMify the ColdFire UART 2017-02-16 14:06:56 +01:00
mem qom: make interface types abstract 2018-12-11 15:45:22 -02:00
mips hw/mips: Use the IEC binary prefix definitions 2018-07-02 15:41:16 +02:00
misc macio: add addr property to macio IDE object 2018-08-30 10:42:18 +10:00
net net: cadence_gem: Add support for selecting the DMA MemoryRegion 2018-10-16 17:13:49 +01:00
nvram fw_cfg: import & use linux/qemu_fw_cfg.h 2018-08-23 18:46:25 +02:00
pci pci: Sync PCIe downstream port LNKSTA on read 2018-12-19 16:48:16 -05:00
pci-bridge Clean up includes 2018-02-09 05:05:11 +01:00
pci-host spapr_pci: add an extra 'nr_msis' argument to spapr_populate_pci_dt 2018-09-25 11:12:25 +10:00
ppc ppc/spapr_caps: Add SPAPR_CAP_NESTED_KVM_HV 2018-11-08 13:08:35 +11:00
riscv RISC-V: Use atomic_cmpxchg to update PLIC bitmaps 2018-09-04 13:19:31 -07:00
s390x s390x/tod: Properly stop the KVM TOD while the guest is not running 2018-12-12 10:39:28 +01:00
scsi scsi-generic: avoid invalid access to struct when emulating block limits 2018-11-06 21:35:06 +01:00
sd sdcard: Reflect when the Spec v3 is supported in the Config Register (SCR) 2018-06-08 13:15:34 +01:00
sh4 hw: Do not include "exec/address-spaces.h" if it is not necessary 2018-06-01 14:15:10 +02:00
sparc sun4u_iommu: update to reflect IOMMU is no longer part of the APB device 2018-01-09 21:48:20 +00:00
ssi hw/ssi/pl022: Allow use as embedded-struct device 2018-08-24 13:17:44 +01:00
timer qom: make interface types abstract 2018-12-11 15:45:22 -02:00
tricore Clean up header guards that don't match their file name 2016-07-12 16:19:16 +02:00
unicore32 hw/unicore32: restrict hw addr defines to source file 2017-12-18 17:07:02 +03:00
usb usb: Add basic code to emulate Chipidea USB IP 2018-02-09 10:40:30 +00:00
vfio vfio: Clean up error reporting after previous commit 2018-10-19 14:51:34 +02:00
virtio virtio-gpu: pass down VirtIOGPU pointer to a bunch of functions 2018-09-03 08:31:50 +02:00
watchdog hw/watchdog/cmsdk_apb_watchdog: Implement CMSDK APB watchdog module 2018-08-20 11:24:33 +01:00
xen compiler: add a sizeof_field() macro 2018-06-27 13:01:40 +01:00
xtensa Clean up includes 2018-02-09 05:05:11 +01:00
boards.h fw_cfg: ignore suffixes in the bootdevice list dependent on machine class 2018-08-16 22:27:43 -03:00
bt.h char: rename CharDriverState Chardev 2017-01-27 18:07:59 +01:00
compat.h q35/440fx/arm/spapr: Add QEMU 4.0 machine type 2018-12-11 15:45:22 -02:00
devices.h hw: Clean "hw/devices.h" includes 2018-06-01 14:15:10 +02:00
elf_ops.h elf_ops.h: Use address_space_write() to write memory 2018-12-14 13:30:49 +00:00
empty_slot.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
fw-path-provider.h qom: make interface types abstract 2018-12-11 15:45:22 -02:00
hotplug.h qom: make interface types abstract 2018-12-11 15:45:22 -02:00
hw.h migration: Split qemu-file.h 2017-06-01 18:49:22 +02:00
ide.h xen-platform: add missing disk unplug option 2017-01-27 15:23:29 -08:00
irq.h hw/core/split-irq: Device that splits IRQ lines 2018-03-02 11:03:45 +00:00
loader-fit.h Use #include "..." for our own headers, <...> for others 2018-02-09 05:05:11 +01:00
loader.h include/hw/loader.h: Document load_image_size() 2018-12-14 13:30:53 +00:00
nmi.h qom: make interface types abstract 2018-12-11 15:45:22 -02:00
or-irq.h hw/core/or-irq: Support more than 16 inputs to an OR gate 2018-06-15 15:23:34 +01:00
pcmcia.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
platform-bus.h platform-bus-device: use device plug callback instead of machine_done notifier 2018-05-10 18:10:56 +01:00
ptimer.h ptimer: Add TRIGGER_ONLY_ON_DECREMENT policy option 2018-07-09 14:51:34 +01:00
qdev-core.h hw: qdev: fix error in comment 2018-12-11 18:28:46 +01:00
qdev-dma.h qdev: Remove hex8/32/64 property types 2014-02-14 21:12:04 +01:00
qdev-properties.h qdev: move qdev_prop_register_global_list() to tests 2018-12-11 15:45:23 -02:00
qdev.h hw: move headers to include/ 2013-04-08 18:13:10 +02:00
register.h hw: register: Run post_write hook on reset 2018-03-01 11:05:43 +00:00
registerfields.h Use #include "..." for our own headers, <...> for others 2018-02-09 05:05:11 +01:00
stream.h qom: make interface types abstract 2018-12-11 15:45:22 -02:00
sysbus.h core/sysbus: remove the SysBusDeviceClass::init path 2018-12-13 13:48:03 +00:00
usb.h usb: Remove legacy -usbdevice options (host, serial, disk and net) 2018-01-26 07:15:08 +01:00