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Michael S. Tsirkin 8347c53243 dataplane: support non-contigious s/g 
bring_map currently fails if one of the entries it's mapping is
contigious in GPA but not HVA address space.  Introduce a mapped_len
parameter so it can handle this, returning the actual mapped length.

This will still fail if there's no space left in the sg, but luckily max
queue size in use is currently 256, while max sg size is 1024, so we
should be OK even is all entries happen to cross a single DIMM boundary.

Won't work well with very small DIMM sizes, unfortunately:
e.g. this will fail with 4K DIMMs where a single
request might span a large number of DIMMs.

Let's hope these are uncommon - at least we are not breaking things.

Reported-by: Stefan Hajnoczi <stefanha@redhat.com>
Reported-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Igor Mammedov <imammedo@redhat.com>
Message-id: 1446047243-3221-2-git-send-email-mst@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-11-09 09:59:32 +00:00
..
9pfs coroutine: move into libqemuutil.a library 2015-10-20 14:59:04 +01:00
acpi hw/acpi/aml-build: remove useless glib version check 2015-11-06 15:42:37 +03:00
alpha Use DEFINE_MACHINE() to register all machines 2015-09-19 16:40:15 +02:00
arm arm: allwinner-a10: Add SATA 2015-11-06 14:09:01 -05:00
audio Remove macros IO_READ_PROTO and IO_WRITE_PROTO 2015-10-19 09:03:53 +02:00
block virtio: sync the dataplane vring state to the virtqueue before virtio_save 2015-10-29 17:59:27 +00:00
bt bt: fix use of uninitialized variable seqlen 2015-11-06 15:42:38 +03:00
char input: Convert to new qapi union layout 2015-11-02 08:30:28 +01:00
core replay: ptimer 2015-11-06 10:16:03 +01:00
cpu icc_bus: drop the unused files 2015-10-02 16:22:02 -03:00
cris cris: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:43 +02:00
display qxl: Use g_new() & friends where that makes obvious sense 2015-11-06 15:42:38 +03:00
dma hw/dma/pxa2xx: Remove superfluous memset 2015-11-06 15:42:38 +03:00
gpio i.MX: Standardize i.MX GPIO debug 2015-10-27 15:59:46 +00:00
i2c i.MX: Standardize i.MX I2C debug 2015-10-27 15:59:46 +00:00
i386 pci-assign: do not test path with access() before opening 2015-11-06 15:42:38 +03:00
ide ahci: Add allwinner AHCI 2015-11-06 14:09:01 -05:00
input hw/input/tsc210x: Remove superfluous memset 2015-11-06 15:42:38 +03:00
intc armv7-m: Implement SYSRESETREQ 2015-11-03 13:49:41 +00:00
ipack pci: Trivial device model conversions to realize 2015-02-26 12:42:16 +01:00
isa hw/isa/lpc_ich9: inject the SMI on the VCPU that is writing to APM_CNT 2015-10-22 14:39:09 +03:00
lm32 ui/opengl: Reduce build required libraries for opengl 2015-11-03 10:13:42 +01:00
m68k m68k: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:43 +02:00
mem memory: Convert to new qapi union layout 2015-11-02 08:30:28 +01:00
microblaze mb: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:43 +02:00
mips hw/mips_malta: Fix KVM PC initialisation 2015-10-30 13:30:14 +00:00
misc i.MX: Standardize i.MX CCM debug 2015-10-27 15:59:46 +00:00
moxie moxie: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:43 +02:00
net i.MX: Standardize i.MX FEC debug 2015-10-27 15:59:46 +00:00
nvram macio-nvram: add to misc category 2015-10-23 12:35:18 +11:00
openrisc * First batch of MAINTAINERS updates 2015-09-25 21:52:30 +01:00
pci fix bad indentation in pcie_cap_slot_write_config() 2015-11-06 15:42:38 +03:00
pci-bridge hw/pci-bridge: format special OFW unit address for PXB host 2015-06-23 22:58:36 +02:00
pci-host uninorth: add to bridge category 2015-10-23 12:35:18 +11:00
pcmcia hw: do not pass NULL to memory_region_init from instance_init 2015-10-09 15:25:56 +02:00
ppc ppc/spapr: add 2.4 compat props 2015-10-29 17:59:26 +00:00
s390x s390x: include HW_COMPAT_* props 2015-10-29 17:59:26 +00:00
scsi * Guest ABI fixes for PC machines (hw_version) 2015-11-05 14:31:24 +00:00
sd sdhci: Split sdhci.h for public and internal device usage 2015-10-29 17:59:27 +00:00
sh4 Use DEFINE_MACHINE() to register all machines 2015-09-19 16:40:15 +02:00
smbios smbios: add smbios 3.0 support 2015-09-07 10:39:28 +01:00
sparc sparc: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:44 +02:00
sparc64 sparc: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:44 +02:00
ssi arm: Use g_new() & friends where that makes obvious sense 2015-09-07 10:39:27 +01:00
timer i.MX: Standardize i.MX GPT debug 2015-10-27 15:59:46 +00:00
tpm maint: remove unused include for dirent.h 2015-09-11 10:21:38 +03:00
tricore tricore: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:44 +02:00
unicore32 Use DEFINE_MACHINE() to register all machines 2015-09-19 16:40:15 +02:00
usb usb: Use g_new() & friends where that makes obvious sense 2015-11-06 15:42:38 +03:00
vfio kvm: Pass PCI device pointer to MSI routing functions 2015-10-19 10:13:07 +02:00
virtio dataplane: support non-contigious s/g 2015-11-09 09:59:32 +00:00
watchdog i6300esb: remove muldiv64() 2015-09-25 14:52:17 +02:00
xen xen: fix invalid assertion 2015-11-06 15:42:38 +03:00
xenpv Use DEFINE_MACHINE() to register all machines 2015-09-19 16:40:15 +02:00
xtensa target-xtensa: xtfpga: attach FLASH to system IO 2015-10-21 21:28:33 +03:00
Makefile.objs smbios: move smbios code into a common folder 2015-08-13 14:08:30 +03:00