Removes special purpose access to Credit1 vCPU
migration delay parameter.
This fixes a build breakage, occuring when Xen
is configured with SCHED_CREDIT=n.
Signed-off-by: Dario Faggioli <dfaggioli@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: George Dunlap <george.dunlap@citrix.com>
This is for the proposal "Allow setting up shared memory areas between VMs
from xl config file". See:
https://lists.xen.org/archives/html/xen-devel/2017-08/msg03242.html
Then plan is to use XENMEM_add_to_physmap_batch to map the shared pages from
one domU to another and use XENMEM_remove_from_physmap to cancel the sharing.
A wrapper to XENMEM_add_to_physmap_batch was added in the following commit:
commit 20e725e936
Now add the wrapper to XENMEM_remove_from_physmap.
Signed-off-by: Zhongze Liu <blackskygg@gmail.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Wei Liu <wei.liu2@citrix.com>
c/s 4ddf474e2 "tools/xen-mceinj: Pass in GPA when injecting through
MSR_MCI_ADDR" removed the remaining user of hypercall.
It has been listed as broken, deprecated and wont-fix since XSA-74, so take
this opportunity to remove it completely.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Christian Lindig <christian.lindig@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Remove the implementation of XEN_DOMCTL_pin_mem_cacheattr since it has
been replaced by a dmop. Change xc_domain_pin_memory_cacheattr() so
that it is only defined when XC_WANT_COMPAT_DEVICEMODEL_API is set and
have it call the new dmop. Leave the definitions of
XEN_DOMCTL_MEM_CACHEATTR_* since they are still used by QEMU.
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
This patch implements new generic set value interfaces in libxc and libxl.
These interfaces are suitable for all allocation features. It also adds a
new MBA set value command in xl.
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
This patch implements generic get value interfaces in libxc and libxl.
It also refactors the get value flow in xl to make it be suitable for all
allocation features. Based on that, a new MBA get value command is added in xl.
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
This patch implements a new libxc get hw info interface and corresponding
data structures. It also changes libxl_psr.c to call this new interface.
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
This patch adds the old value param and the onchangeonly option
to the VM_EVENT_REASON_MOV_TO_MSR event.
The param was added to the vm_event_mov_to_msr struct and to the
hvm_monitor_msr function. Finally I've changed the bool_t param
to a bool for the hvm_msr_write_intercept function.
Signed-off-by: Alexandru Isaila <aisaila@bitdefender.com>
Acked-by: Tamas K Lengyel <tamas@tklengyel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Mixed throughout libxc are uint32_t, int, and domid_t for domid parameters.
With a signed type, and an explicitly 16-bit type, it is exceedingly difficult
to construct an INVALID_DOMID constant which works with all of them. (The
main problem being that domid_t gets unconditionally zero extended when
promoted to int for arithmatic.)
Libxl uses uint32_t consistently everywhere, so alter libxc to match.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Release-acked-by: Julien Grall <julien.grall@linaro.org>
[ wei: fix compilation error in libxl ]
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Add a new domctl API to initialize vpl011. It takes the GFN and console
backend domid as input and returns an event channel to be used for
sending and receiving events from Xen.
Xen will communicate with xenconsole using GFN as the ring buffer and
the event channel to transmit and receive pl011 data on the guest domain's
behalf.
Signed-off-by: Bhupinder Thakur <bhupinder.thakur@linaro.org>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Wei Liu <wei.liu2@citrix.com>
If case of a vm_event with the emulate_flags set, if the instruction
is not implemented by the emulator, the monitor should be notified instead
of directly injecting a hw exception.
This behavior can be used to re-execute an instruction not supported by
the emulator using the real processor (e.g. altp2m) instead of just
crashing.
Signed-off-by: Petre Pircalabu <ppircalabu@bitdefender.com>
Acked-by: Tamas K Lengyel <tamas@tklengyel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Add a new libxc function xc_domain_set_gnttbl_limits() setting the
limits for the maximum numbers of grant table frames and maptrack
frames of a domain.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
In some introspection usecases, an in-guest agent needs to communicate
with the external introspection agent. An existing mechanism is
HVMOP_guest_request_vm_event, but this is restricted to kernel usecases
like all other hypercalls.
Introduce a mechanism whereby the introspection agent can whitelist the
use of HVMOP_guest_request_vm_event directly from userspace.
Signed-off-by: Alexandru Isaila <aisaila@bitdefender.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Tamas K Lengyel <tamas@tklengyel.com>
Add a new libxc function to set hypervisor parameters at runtime
similar to boot time parameters via command line.
Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
In some introspection usecases, an in-guest agent needs to communicate
with the external introspection agent. An existing mechanism is
HVMOP_guest_request_vm_event, but this is restricted to kernel usecases
like all other hypercalls.
Introduce a mechanism whereby the introspection agent can whitelist the
use of HVMOP_guest_request_vm_event directly from userspace.
Signed-off-by: Alexandru Isaila <aisaila@bitdefender.com>
Acked-by: Tamas K Lengyel <tamas@tklengyel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
This patch implements changes in xl/xc changes to support
showing CBM of L2 CAT.
The new level option is introduced to original CAT showing
command in order to show CBM for specified level CAT.
- 'xl psr-cat-show' is updated to show CBM of a domain
according to input cache level.
Examples:
root@:~$ xl psr-cat-show -l2 1
Socket ID : 0
Default CBM : 0xff
ID NAME CBM
1 ubuntu14 0x7f
Signed-off-by: He Chen <he.chen@linux.intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
This patch implements xl/xc changes to support get HW info
for L2 CAT.
'xl psr-hwinfo' is updated to show both L3 CAT and L2 CAT
info.
Example(on machine which only supports L2 CAT):
Cache Monitoring Technology (CMT):
Enabled : 0
Cache Allocation Technology (CAT): L2
Socket ID : 0
Maximum COS : 3
CBM length : 8
Default CBM : 0xff
Signed-off-by: He Chen <he.chen@linux.intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
There are no current users which I can locate. One piece of xend which didn't
move forwards into xl/libxl is this:
# Configure host CPUID consistency checks, which must be satisfied for this
# VM to be allowed to run on this host's processor type:
#cpuid_check=[ '1:ecx=xxxxxxxxxxxxxxxxxxxxxxxxxx1xxxxx' ]
# - Host must have VMX feature flag set
The implementation of xc_cpuid_check() is conceptually broken. Dom0's view of
CPUID is not the approprite view to check, and will be wrong in the presence
of CPUID masking/faulting, and for HVM-based toolstack domains.
If it turns out that the functionality is required, it should be implemented
in terms of XEN_SYSCTL_get_cpuid_policy to use the proper CPUID view.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Though XEN_MC_inject_v2 allows injecting MC# to specified CPUs, the
current xc_mca_op() does not use this feature and not provide an
interface to callers. This commit add a new xc_mca_op_inject_v2() that
receives a cpumap providing the set of target CPUs.
Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
This patch adds new interface for GNTTABOP_query_size in libxc to help
query the current grant table frames and maximum grant table frames for a
specific domain.
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Add support for filtering out the write_ctrlreg monitor events if they
are generated only by changing certains bits.
A new parameter (bitmask) was added to the xc_monitor_write_ctrlreg
function in order to mask the event generation if the changed bits are
set.
Signed-off-by: Petre Pircalabu <ppircalabu@bitdefender.com>
Acked-by: Tamas K Lengyel <tamas@tklengyel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
xc_{get,set}_hvm_param() are deprecated because they truncate their value
parameter in 32bit builds of libxc, and are therefore unfit for use.
As there is only a single remaining user, switch that user over to
xc_hvm_param_get() and drop these functions completely.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Currently xc_translate_foreign_address() only checks for the PSE bit on
level 2 entries (that's 2 MB pages on x64 and 32-bit with PAE, and 4 MB
pages on 32-bit). But the Linux kernel sometimes uses 1 GB pages. This
patch fixes that, by checking the PSE bit on level 3 entries if the guest
has 4 translation levels (that means 64-bit guests only).
Signed-off-by: Cristian-Bogdan Sirb <csirb@bitdefender.com>
Signed-off-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Release-acked-by: Julien Grall <julien.grall@arm.com>
which surprisingly (or maybe not) looks like
XEN_SYSCTL_TMEM_OP_SET_POOLS.
This hypercall came about, as explained in docs/misc/tmem-internals.html:
When tmem was first proposed to the linux kernel mailing list
(LKML), there was concern expressed about security of shared ephemeral
pools. The initial tmem implementation only
required a client to provide a 128-bit UUID to identify a shared pool, and the
linux-side tmem implementation obtained this UUID from the superblock of the
shared filesystem (in ocfs2). It was
pointed out on LKML that the UUID was essentially a security key and any
malicious domain that guessed it would have access to any data from the shared
filesystem that found its way into tmem.
..
As a result, a Xen boot option -- tmem_shared_auth; -- was
added. The option defaults to disabled,
but when it is enabled, management tools must explicitly authenticate (or may
explicitly deny) shared pool access to any client.
On Xen, this is done with the xm tmem-shared-auth command.
"
However the implementation has some rather large holes:
a) The hypercall was accessed from any guest.
b) If the ->domain id value is 0xFFFF then one can toggle the
tmem_global.shared_auth knob on/off. That with a)
made it pretty bad.
c) If one toggles the tmem_global.shared_auth off, then the
'tmem_shared_auth=1' bootup parameter is ignored and
one can join any shared pool (if UUID is known)!
d) If the 'tmem_shared_auth=1' and tmem_global.shared_auth is
set to 1, then one can only join an shared pool if the
UUID has been set by 'xl tmem-shared-auth'. Otherwise
the joining of a pool fails and a non-shared pool is
created (without errors to guest). Not exactly sure if
the shared pool creation at that point should error out
or not.
e) If a guest is migrated, the policy values (which UUID
can be shared, whether tmem_global.shared_auth is set, etc)
are completely ignored.
This patch only fixes a) and only allows the hypercall to
be called by the control domain. Subsequent patches will
fix the remaining issues.
We also have to call client_create as the guest at this
point may not have done any tmem hypercalls - and hence
the '->tmem' from 'struct domain' is still NULL. Us calling
client_create fixes this.
Acked-by: Wei Liu <wei.liu2@citrix.com> [libxc changes]
Reviewed-by: Jan Beulich <jbeulich@suse.com> [hypervisor changes]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
It's useful for an introspection tool to be able to inspect
XSAVE states. Xen already has a DOMCTL that can be used for this
purpose, but it had no public libxc wrapper. This patch adds
xc_vcpu_get_extstate().
Signed-off-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
This patch extracts all functions resulting in a dm_op hypercall from
libxenctrl and moves them into libxendevicemodel. It also adds a compat
layer into libxenctrl, which can be selected by defining
XC_WANT_COMPAT_DEVICEMODEL_API to 1 before including xenctrl.h.
With this patch the core of libxendevicemodel still uses libxencall to
issue the dm_op hypercalls, but this is done by calling through code that
can be modified on a per-OS basis. A subsequent patch will add a Linux-
specific variant.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Callers to xc_cpupool_create() can either request a specific pool id,
or request that Xen do it for them. But at the moment, the
"automatic" selection is indicated by using a magic value, 0. This is
undesirable both because it doesn't obviously have meaning, but also
because '0' is a valid cpupool (albeit one which at the moment can't
be changed).
Introduce a constant, XC_CPUPOOL_POOLID_ANY, to indicate this instead.
Have it be the default for the python bindings.
Manually translate it, even though it's the same underlying value,
because we don't yet have a relaible way of enforcing that these
values are the same.
Signed-off-by: George Dunlap <george.dunlap@citrix.com>
Reviewed-by: Dario Faggioli <dario.faggioli@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
When the toolstack modifies memory of a running ARM VM it may happen
that the underlying memory of a current vCPU PC is changed. Without
flushing the icache the vCPU may continue executing stale instructions.
Also expose the xc_domain_cacheflush through xenctrl.h.
Signed-off-by: Tamas K Lengyel <tamas.lengyel@zentific.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
NOTE: This patch also modifies the types of the 'vector', 'type' and
'insn_len' arguments of xc_hvm_inject_trap() from uint32_t to
uint8_t. In practice the values passed were always truncated to
8 bits.
Suggested-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
This patch removes the need for handling HVMOP restarts, so that
infrastructure is removed.
NOTE: This patch also modifies the type of the 'nr' argument of
xc_hvm_set_mem_type() from uint64_t to uint32_t. In practice the
value passed was always truncated to 32 bits.
Suggested-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
This patch introduces code to handle DMOP continuations.
NOTE: This patch also modifies the type of the 'nr' argument of
xc_hvm_modified_memory() from uint64_t to uint32_t. In practice the
value passed was always truncated to 32 bits.
Suggested-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
... HVMOP_set_pci_link_route
These HVMOPs were exposed to guests so their definitions need to be
preserved for compatibility. This patch therefore updates
__XEN_LATEST_INTERFACE_VERSION__ to 0x00040900 and makes the HVMOP
defintions conditional on __XEN_INTERFACE_VERSION__ less than that value.
NOTE: This patch also widens the 'domain' parameter of
xc_hvm_set_pci_intx_level() from a uint8_t to a uint16_t.
Suggested-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
The handle type passed to the underlying shadow and hap functions is
changed for compatibility with the new hypercall buffer.
NOTE: This patch also modifies the type of the 'nr' parameter of
xc_hvm_track_dirty_vram() from uint64_t to uint32_t. In practice
the value passed was always truncated to 32 bits.
Suggested-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: George Dunlap <george.dunlap@eu.citrix.com>
Acked-by: Tim Deegan <tim@xen.org>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
...as a set of hypercalls to be used by a device model.
As stated in the new docs/designs/dm_op.markdown:
"The aim of DMOP is to prevent a compromised device model from
compromising domains other then the one it is associated with. (And is
therefore likely already compromised)."
See that file for further information.
This patch simply adds the boilerplate for the hypercall.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Suggested-by: Ian Jackson <ian.jackson@citrix.com>
Suggested-by: Jennifer Herbert <jennifer.herbert@citrix.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
The tools that use kexec are asynchronous in nature and do not keep
state changes. As such provide an hypercall to find out whether an
image has been loaded for either type.
Note: No need to modify XSM as it has one size fits all check and
does not check for subcommands.
Note: No need to check KEXEC_FLAG_IN_PROGRESS (and error out of
kexec_status()) as this flag is set only once by the first/only
cpu on the crash path.
Note: This is just the Xen side of the hypercall, kexec-tools patch
to come separately.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Eric DeVolder <eric.devolder@oracle.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
The hypervisor expects the timeout from the hypercall to be in
nanoseconds, so document this correctly. Also correctly document
what happens when timeout is set to zero.
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
That is what they are used for. Lets make it more clear.
Of all the various sub-commands, the only one that needed
semantic change is XEN_SYSCTL_TMEM_OP_SAVE_BEGIN. That in the
past used 'arg1', and now we are moving it to use 'arg'.
Since that code is only used during migration which is tied
to the toolstack it is OK to change it.
We should increment the XEN_SYSCTL_INTERFACE_VERSION because
of this, and that was fortunatly done in the patch titled:
"tmem/libxc: Squash XEN_SYSCTL_TMEM_OP_[SET|SAVE].."
While at it, also fix xc_tmem_control_oid to properly handle
the 'buf' and bounce it as appropiate.
Acked-by: Andrew cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The ARM SMC instructions are already configured to trap to Xen by default. In
this patch we allow a user-space process in a privileged domain to receive
notification of when such event happens through the vm_event subsystem by
introducing the PRIVILEGED_CALL type.
The intended use-case for this feature is for a monitor application to be able
insert tap-points into the domU kernel-code. For this task only unconditional
SMC instruction should be used.
Signed-off-by: Tamas K Lengyel <tamas.lengyel@zentific.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
The main purpose of the patch is to provide the xen-libxc
plumbing necessary to be able to change the value of the
ratelimit_us parameter online, for Credit2 (like it is
already for Credit1).
While there:
- mention in the Xen logs when rate limiting was enables
and is being disabled (and vice-versa);
- fix csched2_sys_cntl() which was always returning
-EINVAL in the XEN_SYSCTL_SCHEDOP_putinfo case.
And also:
- fix style of an if in csched_sys_cntl();
- fix the style of the switch in csched2_sys_cntl();
Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
Reviewed-by: George Dunlap <george.dunlap@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Currently it is only possible to set mem_access restrictions only for
a contiguous range of GFNs (or, as a particular case, for a single GFN).
This patch introduces a new libxc function taking an array of GFNs.
The alternative would be to set each page in turn, using a userspace-HV
roundtrip for each call, and triggering a TLB flush per page set.
Signed-off-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Tamas K Lengyel <tamas@tklengyel.com>
Acked-by: Julien Grall <julien.grall@arm.com>
Acked-by: George Dunlap <george.dunlap@citrix.com>
Currently mem-sharing can be performed on a page-by-page basis from the control
domain. However, this process is quite wasteful when a range of pages have to
be deduplicated.
This patch introduces a new mem_sharing memop for range sharing where
the user doesn't have to separately nominate each page in both the source and
destination domain, and the looping over all pages happen in the hypervisor.
This significantly reduces the overhead of sharing a range of memory.
Signed-off-by: Tamas K Lengyel <tamas.lengyel@zentific.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Dario Faggioli
Zhongze Liu
Andrew Cooper
Ross Lagerwall
Yi Sun
Alexandru Isaila
Bhupinder Thakur
Petre Pircalabu
Juergen Gross
Jan Beulich
Haozhong Zhang
Dongli Zhang
Wei Liu
Adrian Pop
Cristian-Bogdan Sirb
Konrad Rzeszutek Wilk
Roger Pau Monne
Razvan Cojocaru
Paul Durrant
George Dunlap
Tamas K Lengyel
Eric DeVolder
Dario Faggioli