| 5ebc77de83c7b74543de774afa7395b3b790e65e |
|
11-Sep-2014 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: introduce XENFEAT_grant_map_identity
The flag tells us that the hypervisor maps a grant page to guest
physical address == machine address of the page in addition to the
normal grant mapping address. It is needed to properly issue cache
maintenance operation at the completion of a DMA operation involving a
foreign grant.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Tested-by: Denis Schneider <v1ne2go@gmail.com>
|
| a91c7775e3469821711c1eadf15149b3ba2c82c9 |
|
25-Jul-2014 |
Himangi Saraogi <himangi774@gmail.com> |
xen/arm: use BUG_ON
Use BUG_ON(x) rather than if(x) BUG();
The semantic patch that fixes this problem is as follows:
// <smpl>
@@ identifier x; @@
-if (x) BUG();
+BUG_ON(x);
// </smpl>
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| 79390289cfeb6d0f4295ca32a54630c93154428e |
|
08-May-2014 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
arm,arm64/xen: introduce HYPERVISOR_suspend()
Introduce HYPERVISOR_suspend() and a few additional empty stubs for
Xen arch specific functions called by drivers/xen/manage.c.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
|
| 9f1d341415b9d84fcf0cb04f409bd61fac5e2f14 |
|
09-May-2014 |
Ian Campbell <ian.campbell@citrix.com> |
arm: xen: export HYPERVISOR_multicall to modules.
"arm: xen: implement multicall hypercall support." forgot to do this.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| 47c542050d306e50f09512eb6339dbf2fc02fddd |
|
30-Jan-2014 |
Julien Grall <julien.grall@linaro.org> |
xen/gnttab: Use phys_addr_t to describe the grant frame base address
On ARM, address size can be 32 bits or 64 bits (if CONFIG_ARCH_PHYS_ADDR_T_64BIT
is enabled).
We can't assume that the grant frame base address will always fits in an
unsigned long. Use phys_addr_t instead of unsigned long as argument for
gnttab_setup_auto_xlat_frames.
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
|
| 8b271d57b57585a3e3e8cd7abc5f4d7710a0e62d |
|
30-Jan-2014 |
Julien Grall <julien.grall@linaro.org> |
arm/xen: Initialize event channels earlier
Event channels driver needs to be initialized very early. Until now, Xen
initialization was done after all CPUs was bring up.
We can safely move the initialization to an early initcall.
Also use a cpu notifier to:
- Register the VCPU when the CPU is prepared
- Enable event channel IRQ when the CPU is running
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| efaf30a3357872cf0fc7d555b1f9968ec71535d3 |
|
06-Jan-2014 |
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
xen/grant: Implement an grant frame array struct (v3).
The 'xen_hvm_resume_frames' used to be an 'unsigned long'
and contain the virtual address of the grants. That was OK
for most architectures (PVHVM, ARM) were the grants are contiguous
in memory. That however is not the case for PVH - in which case
we will have to do a lookup for each virtual address for the PFN.
Instead of doing that, lets make it a structure which will contain
the array of PFNs, the virtual address and the count of said PFNs.
Also provide a generic functions: gnttab_setup_auto_xlat_frames and
gnttab_free_auto_xlat_frames to populate said structure with
appropriate values for PVHVM and ARM.
To round it off, change the name from 'xen_hvm_resume_frames' to
a more descriptive one - 'xen_auto_xlat_grant_frames'.
For PVH, in patch "xen/pvh: Piggyback on PVHVM for grant driver"
we will populate the 'xen_auto_xlat_grant_frames' by ourselves.
v2 moves the xen_remap in the gnttab_setup_auto_xlat_frames
and also introduces xen_unmap for gnttab_free_auto_xlat_frames.
Suggested-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
[v3: Based on top of 'asm/xen/page.h: remove redundant semicolon']
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| a7892f32cc3534d4cc0e64b245fbf47a8e364652 |
|
11-Dec-2013 |
Ian Campbell <ian.campbell@citrix.com> |
arm: xen: foreign mapping PTEs are special.
These mappings are in fact special and require special handling in privcmd,
which already exists. Failure to mark the PTE as special on arm64 causes all
sorts of bad PTE fun. e.g.
e.g.:
BUG: Bad page map in process xl pte:e0004077b33f53 pmd:4079575003
page:ffffffbce1a2f328 count:1 mapcount:-1 mapping: (null) index:0x0
page flags: 0x4000000000000014(referenced|dirty)
addr:0000007fb5259000 vm_flags:040644fa anon_vma: (null) mapping:ffffffc03a6fda58 index:0
vma->vm_ops->fault: privcmd_fault+0x0/0x38
vma->vm_file->f_op->mmap: privcmd_mmap+0x0/0x2c
CPU: 0 PID: 2657 Comm: xl Not tainted 3.12.0+ #102
Call trace:
[<ffffffc0000880f8>] dump_backtrace+0x0/0x12c
[<ffffffc000088238>] show_stack+0x14/0x1c
[<ffffffc0004b67e0>] dump_stack+0x70/0x90
[<ffffffc000125690>] print_bad_pte+0x12c/0x1bc
[<ffffffc0001268f4>] unmap_single_vma+0x4cc/0x700
[<ffffffc0001273b4>] unmap_vmas+0x68/0xb4
[<ffffffc00012c050>] unmap_region+0xcc/0x1d4
[<ffffffc00012df20>] do_munmap+0x218/0x314
[<ffffffc00012e060>] vm_munmap+0x44/0x64
[<ffffffc00012ed78>] SyS_munmap+0x24/0x34
Where unmap_single_vma contains inlined -> unmap_page_range -> zap_pud_range
-> zap_pmd_range -> zap_pte_range -> print_bad_pte.
Or:
BUG: Bad page state in process xl pfn:4077b4d
page:ffffffbce1a2f8d8 count:0 mapcount:-1 mapping: (null) index:0x0
page flags: 0x4000000000000014(referenced|dirty)
Modules linked in:
CPU: 0 PID: 2657 Comm: xl Tainted: G B 3.12.0+ #102
Call trace:
[<ffffffc0000880f8>] dump_backtrace+0x0/0x12c
[<ffffffc000088238>] show_stack+0x14/0x1c
[<ffffffc0004b67e0>] dump_stack+0x70/0x90
[<ffffffc00010f798>] bad_page+0xc4/0x110
[<ffffffc00010f8b4>] free_pages_prepare+0xd0/0xd8
[<ffffffc000110e94>] free_hot_cold_page+0x28/0x178
[<ffffffc000111460>] free_hot_cold_page_list+0x38/0x60
[<ffffffc000114cf0>] release_pages+0x190/0x1dc
[<ffffffc00012c0e0>] unmap_region+0x15c/0x1d4
[<ffffffc00012df20>] do_munmap+0x218/0x314
[<ffffffc00012e060>] vm_munmap+0x44/0x64
[<ffffffc00012ed78>] SyS_munmap+0x24/0x34
x86 already gets this correct. 32-bit arm gets away with this because there is
not PTE_SPECIAL bit in the PTE there and the vm_normal_page fallback path does
the right thing.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| c94cae53f9e564484f906a79be5639fc66e8cb02 |
|
04-Dec-2013 |
Eric Trudeau <etrudeau@broadcom.com> |
XEN: Grant table address, xen_hvm_resume_frames, is a phys_addr not a pfn
From: Eric Trudeau <etrudeau@broadcom.com>
xen_hvm_resume_frames stores the physical address of the grant table.
englighten.c was incorrectly setting it as if it was a page frame number.
This caused the table to be mapped into the guest at an unexpected physical
address.
Additionally, a warning is improved to include the grant table address which
failed in xen_remap.
Signed-off-by: Eric Trudeau <etrudeau@broadcom.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| e1a9c16b303725ac900fee2a3ec4dbe2c2f846ab |
|
09-Sep-2013 |
Julien Grall <julien.grall@linaro.org> |
xen/arm: disable cpuidle and cpufreq when linux is running as dom0
When linux is running as dom0, Xen doesn't show the physical cpu but a
virtual CPU.
On some ARM SOC (for instance the exynos 5250), linux registers callbacks
for cpuidle and cpufreq. When these callbacks are called, they will modify
directly the physical cpu not the virtual one. It can impact the whole board
instead of only dom0.
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
|
| 9dd4b2944c46e1fdbd0a516c221c8a2670cbf005 |
|
29-Aug-2013 |
Rob Herring <rob.herring@calxeda.com> |
ARM: xen: only set pm function ptrs for Xen guests
xen_pm_init was unconditionally setting pm_power_off and arm_pm_restart
function pointers. This breaks multi-platform kernels. Make this
conditional on running as a Xen guest and make it a late_initcall to
ensure it is setup after platform code for Dom0.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
CC: stable@vger.kernel.org
|
| 0d7febe58413884f6428143221971618fbf3a47d |
|
29-Jul-2013 |
Julien Grall <julien.grall@linaro.org> |
xen/arm: missing put_cpu in xen_percpu_init
When CONFIG_PREEMPT is enabled, Linux will not be able to boot and warn:
[ 4.127825] ------------[ cut here ]------------
[ 4.133376] WARNING: at init/main.c:699 do_one_initcall+0x150/0x158()
[ 4.140738] initcall xen_init_events+0x0/0x10c returned with preemption imbalance
This is because xen_percpu_init uses get_cpu but doesn't have the corresponding
put_cpu.
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| 2451ade070ef9b0a0f118ac41896da856e72b5a1 |
|
21-Jul-2013 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm,arm64: update xen_restart after ff701306cd49 and 7b6d864b48d9
Commit 7b6d864b48d9 (reboot: arm: change reboot_mode to use enum
reboot_mode) and ff701306cd49 (arm64: use common reboot infrastructure)
change the prototype of arm_pm_restart on arm and arm64.
Update xen_restart accordingly.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| 176455e9a9e2a37a0b3eec6f6d7883de720c02c7 |
|
02-Jul-2013 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm and xen/arm64: implement HYPERVISOR_tmem_op
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| 3cc8e40e8ff8e232a9dd672da81beabd09f87366 |
|
08-May-2013 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: rename xen_secondary_init and run it on every online cpu
Rename xen_secondary_init to xen_percpu_init.
Run xen_percpu_init on the each online cpu, reuse the current on_each_cpu call.
Merge xen_percpu_enable_events into xen_percpu_init.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| d7266d7894b111dee9b081c05944533bc8780eca |
|
08-May-2013 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: do not handle VCPUOP_register_vcpu_info failures
We expect VCPUOP_register_vcpu_info to succeed, do not try to handle
failures.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
|
| 1aa3d8d9935dfb459d64f06ccd828b56147fd971 |
|
08-May-2013 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: initialize pm functions later
If we are running in dom0, we have to wait for the arch specific code to
complete the initialization in order for us to successfully reset the
power_off and pm_restart functions.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| 9bc25a1d5f95f97e9e378620a46e954d3f842641 |
|
27-Apr-2013 |
Wei Yongjun <yongjun_wei@trendmicro.com.cn> |
xen/arm: remove duplicated include from enlighten.c
Remove duplicated include.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
|
| 6abb749e83cf100bc4c71537e4c4e97ccdadcafe |
|
25-Apr-2013 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: use sched_op hypercalls for machine reboot and power off
Changes in v5:
- set pm_power_off and arm_pm_restart from the Xen specific
intialization code.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| 9a9ab3cc00dc0c338e3ab96f75a0e1a3c1aa3c27 |
|
25-Apr-2013 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: SMP support
Map vcpu_info using VCPUOP_register_vcpu_info on all the online vcpus,
make sure the allocated struct doesn't cross a page boundary.
Call enable_percpu_irq on every cpu.
Changes in v5:
- allocate xen_vcpu_info dynamically, aligning it to the size of the
struct;
- use VCPUOP_register_vcpu_info on cpu0 too.
Changed in v2:
- move the percpu variable argument fix to a separate patch;
- remove unused variable.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| ea0af61321347d7742714d3ebf30df418e6482e2 |
|
25-Apr-2013 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: implement HYPERVISOR_vcpu_op
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Ian Campbell <ian.campbell@citrix.com>
|
| 2798ba7d19aed645663398a21ec4006bfdbb1ef3 |
|
25-Apr-2013 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: actually pass a non-NULL percpu pointer to request_percpu_irq
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Ian Campbell <ian.camjpbell@citrix.com>
CC: stable@vger.kernel.org
|
| 07d0c943663f82d9682856c0a7db7145a6c911d6 |
|
20-Feb-2013 |
Ian Campbell <ian.campbell@citrix.com> |
xen: implement updated XENMEM_add_to_physmap_range ABI
Allows for more fine grained error reporting. Only used by PVH and
ARM both of which are marked EXPERIMENTAL precisely because the ABI
is not yet stable
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
[v1: Rebased without PVH patches]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
|
| f832da068b0aadb15f747f6427b6bf945f525ba4 |
|
03-Oct-2012 |
Ian Campbell <ian.campbell@citrix.com> |
xen: arm: implement remap interfaces needed for privcmd mappings.
We use XENMEM_add_to_physmap_range which is the preferred interface
for foreign mappings.
Acked-by: Mukesh Rathor <mukesh.rathor@oracle.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
|
| c61ba7291b81ed7fd8c1dba1b45d05cae3f150f7 |
|
03-Oct-2012 |
Ian Campbell <ian.campbell@citrix.com> |
xen: arm: enable balloon driver
The code is now in a state where can just enable it.
Drop the *_xenballloned_pages duplicates since these are now supplied
by the balloon code.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
|
| ab277bbf662ef17ffb7fd8dd7a462a34e326e492 |
|
08-Nov-2012 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: Fix compile errors when drivers are compiled as modules (export more).
The commit 911dec0db4de6ccc544178a8ddaf9cec0a11d533
"xen/arm: Fix compile errors when drivers are compiled as modules." exports
the neccessary functions. But to guard ourselves against out-of-tree modules
and future drivers hitting this, lets export all of the relevant
hypercalls.
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
|
| 911dec0db4de6ccc544178a8ddaf9cec0a11d533 |
|
06-Nov-2012 |
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
xen/arm: Fix compile errors when drivers are compiled as modules.
We end up with:
ERROR: "HYPERVISOR_event_channel_op" [drivers/xen/xen-gntdev.ko] undefined!
ERROR: "privcmd_call" [drivers/xen/xen-privcmd.ko] undefined!
ERROR: "HYPERVISOR_grant_table_op" [drivers/net/xen-netback/xen-netback.ko] undefined!
and this patch exports said function (which is implemented in hypercall.S).
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
|
| ea54209b16cbecad8928f6067af29069ac44e360 |
|
08-Aug-2012 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: implement alloc/free_xenballooned_pages with alloc_pages/kfree
Only until we get the balloon driver to work.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
|
| 0ec53ecf38bcbf95b4b057328a8fbba4d22ef28b |
|
14-Sep-2012 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: receive Xen events on ARM
Compile events.c on ARM.
Parse, map and enable the IRQ to get event notifications from the device
tree (node "/xen").
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
|
| b3b52fd87e8f7544fde75a471108bd5bd4492c90 |
|
13-Sep-2012 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: initialize grant_table on ARM
Initialize the grant table mapping at the address specified at index 0
in the DT under the /xen node.
After the grant table is initialized, call xenbus_probe (if not dom0).
Changes in v2:
- introduce GRANT_TABLE_PHYSADDR;
- remove unneeded initialization of boot_max_nr_grant_frames.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| ef61ee0dc7ba0409dc0e8122de90d4e48d4c8669 |
|
08-Aug-2012 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: get privilege status
Use Xen features to figure out if we are privileged.
XENFEAT_dom0 was introduced by 23735 in xen-unstable.hg.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
|
| 2e01f16601d8924b12b1acf1cdc49a0d1cc1cfb2 |
|
14-Sep-2012 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
xen/arm: Xen detection and shared_info page mapping
Check for a node in the device tree compatible with "xen,xen", if it is
present set xen_domain_type to XEN_HVM_DOMAIN and continue
initialization.
Map the real shared info page using XENMEM_add_to_physmap with
XENMAPSPACE_shared_info.
Changes in v4:
- simpler parsing of Xen version in the compatible DT node.
Changes in v3:
- use the "xen,xen" notation rather than "arm,xen";
- add an additional check on the presence of the Xen version.
Changes in v2:
- replace pr_info with pr_debug.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
| 4c071ee5268f7234c3d084b6093bebccc28cdcba |
|
14-Sep-2012 |
Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
arm: initial Xen support
- Basic hypervisor.h and interface.h definitions.
- Skeleton enlighten.c, set xen_start_info to an empty struct.
- Make xen_initial_domain dependent on the SIF_PRIVILIGED_BIT.
The new code only compiles when CONFIG_XEN is set, that is going to be
added to arch/arm/Kconfig in patch #11 "xen/arm: introduce CONFIG_XEN on
ARM".
Changes in v3:
- improve comments.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
|