motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 08:13:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

s390x/pci: Honor DMA limits set by vfio

Browse source 
When an s390 guest is using lazy unmapping, it can result in a very
large number of oustanding DMA requests, far beyond the default
limit configured for vfio.  Let's track DMA usage similar to vfio
in the host, and trigger the guest to flush their DMA mappings
before vfio runs out.

Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
[aw: non-Linux build fixes]
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Matthew Rosato 2020-10-26 11:34:35 -04:00 • committed by Alex Williamson
parent cd7498d07f
commit 37fa32de70
6 changed files with 117 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

3
include/hw/s390x/s390-pci-inst.h
View file

@ -254,6 +254,9 @@ typedef struct ClpReqRspQueryPciGrp {
#define ZPCI_STPCIFC_ST_INVAL_DMAAS 28
#define ZPCI_STPCIFC_ST_ERROR_RECOVER 40
/* Refresh PCI Translations status codes */
#define ZPCI_RPCIT_ST_INSUFF_RES 16
/* FIB function controls */
#define ZPCI_FIB_FC_ENABLED 0x80
#define ZPCI_FIB_FC_ERROR 0x40