Commit Graph

146 Commits

Author SHA1 Message Date
Andrew Turner
9439047657 Use pmap_load more consistently. While here try to only load the data once
when we reuse the same data.

Obtained from:	EuroBSDCon Devsummit
Sponsored by:	ABT Systems Ltd
2015-10-01 10:43:40 +00:00
Andrew Turner
7991717238 Add the ENTRY/END entries around the exception handlers.
Obtained from:	EuroBSDCon Devsummit
Sponsored by:	ABT Systems Ltd
2015-10-01 09:44:15 +00:00
Alan Cox
9f86aba61c Exploit r288122 to address a cosmetic issue. Since PV chunk pages don't
belong to a vm object, they can't be paged out.  Since they can't be paged
out, they are never enqueued in a paging queue.  Nonetheless, passing
PQ_INACTIVE to vm_page_unwire() creates the appearance that these pages
are being enqueued in the inactive queue.  As of r288122, we can avoid
this false impression by passing PQ_NONE.

Submitted by:	kmacy (an earlier version)
Differential Revision:	https://reviews.freebsd.org/D1674
2015-09-26 07:18:05 +00:00
Ed Maste
7fc0791608 Remove apostrophe from AP's for consistency (arm64 mp_machdep) 2015-09-25 21:04:31 +00:00
Ed Maste
2ed39a2216 Add pass device to arm64 GENERIC (for smartctl)
Sponsored by:	The FreeBSD Foundation
2015-09-22 21:43:08 +00:00
Konstantin Belousov
37864a5451 Call ast when handling irq from userspace, otherwise we could miss
reschedule.  Right now arm_cpu_intr() does critical_exit() as the last
action, so the impact is not serious.

Remove duplicated interrupt disable in restore_registers macro, when
returning to usermode.  The do_ast macro disabled interrupts for us.

Reviewed by:	andrew
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D3714
2015-09-22 18:30:06 +00:00
Andrew Turner
9063d39e49 Don't restore interrupts when we are about to disable them in the next
instruction.
2015-09-22 16:46:34 +00:00
Konstantin Belousov
d50c68b2f0 Re-check for new ast after ast was handled. We should not return to
usermode with pending asts.

Reviewed by:	andrew
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D3667
2015-09-22 16:29:55 +00:00
Ed Maste
a9ee805d45 arm64 ThunderX PCIe workaround: enumerate only one slot for now
Otherwise an em(4) NIC is detected 32 times.

Submitted by:	wma@semihalf.com
Obtained from:	Semihalf
Differential Revision:	https://reviews.freebsd.org/D3706
2015-09-22 12:56:34 +00:00
Konstantin Belousov
0510aedcd5 Do not execute exception handlers with disabled interrupts.
We should not call vm_fault(), or send a signal, with interrupts
disabled.  MI kernel code is not prepared for such environment, not to
mention that this increases system latency, since code appears to be
executing as being under spinlock.

The FAR register for data aborts is read before the interrupts are
enabled, to avoid its corruption due to nested exception or context
switch.

Add asserts, similar to the checks done by other architectures, about
not taking page faults in non-sleepable contexts, rather than die with
late and somewhat confusing witness diagnostic.

Reviewed by:	andrew
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D3669
2015-09-18 17:09:59 +00:00
Konstantin Belousov
6ced378970 Clear exclusive monitors when handling data aborts, the monitors are
in unknown state per spec.

Reviewed by:	andrew (previous version)
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D3668
2015-09-18 16:52:18 +00:00
Andrew Turner
cf8b6f76a2 Don't read the floating-point registers for now. We will need to enable the
VFP around the read of these instructions as they may raise an exception.

Sponsored by:	ABT Systems Ltd
2015-09-18 13:44:15 +00:00
Zbigniew Bodek
7b1c945350 Block secondary ITS instances from attaching on ARM64
Currently FreeBSD supports only single PIC controller. Some systems
that have more than one (like ThunderX dual-socket) fails to boot.
Disable other PICes until proper handling is implemented in the
generic interrupt code.

Reviewed by:   imp
Obtained from: Semihalf
Sponsored by:  The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3682
2015-09-16 23:59:45 +00:00
Zbigniew Bodek
dbf66ac207 Release memory for CPUs that fail to init on ARM64
cpu_init_fdt will now release memory allocated for structures
serving CPUs that have failed to init.

Obtained from: Semihalf
Sponsored by:  The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3297
2015-09-16 23:46:20 +00:00
Ed Maste
9b76bf99d5 arm64: add xhci driver and umass/ukbd to GENERIC for Cavium ThunderX
Sponsored by:	The FreeBSD Foundation
2015-09-15 19:59:35 +00:00
Mark Johnston
610141cebb Add stack_save_td_running(), a function to trace the kernel stack of a
running thread.

It is currently implemented only on amd64 and i386; on these
architectures, it is implemented by raising an NMI on the CPU on which
the target thread is currently running. Unlike stack_save_td(), it may
fail, for example if the thread is running in user mode.

This change also modifies the kern.proc.kstack sysctl to use this function,
so that stacks of running threads are shown in the output of "procstat -kk".
This is handy for debugging threads that are stuck in a busy loop.

Reviewed by:	bdrewery, jhb, kib
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D3256
2015-09-11 03:54:37 +00:00
Konstantin Belousov
1fa6712471 Do not hold the process around the vm_fault() call from the trap()s.
The only operation which is prevented by the hold is the kernel stack
swapout for the faulted thread, which should be fine to allow.

Remove useless checks for NULL curproc or curproc->p_vmspace from the
trap_pfault() wrappers on x86 and powerpc.

Reviewed by:	alc (previous version)
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2015-09-10 17:46:48 +00:00
Andrew Turner
8fe99e427f Rework copyinstr to:
* Fail when the length passed in is 0
 * Remove an unneeded increment of the count on success
 * Return ENAMETOOLONG when the input pointer is too long

Sponsored by:	ABT Systems Ltd
2015-09-09 11:51:14 +00:00
Andrew Turner
384dd3be15 Add support for pmap_mincore on arm64 by walking the page tables to find
the details for the requested address.

PR:		202307
Obtained from:	ABT Systems Ltd
Sponsored by:	The FreeBSD Foundation
2015-09-08 18:41:06 +00:00
Andrew Turner
0a21ab2c4b Use load-acquire semantics while waiting for td_lock to be released. The
store should have release semantics and will have due to the dsb above it
so add a comment to explain this. [1]

While here update the code to not reload the current thread, it's already
in a register, we just need to not trash it.

Suggested by:	kib [1]
Sponsored by:	ABT Systems Ltd
2015-09-07 14:01:18 +00:00
Andrew Turner
f452c30169 When dropping to EL1 ensure we have written to all special registers by
moving the instruction barrier to just before we drop exception level.

Sponsored by:	ABT Systems Ltd
2015-09-07 10:13:14 +00:00
Andrew Turner
2dae850b5e Add ddb show commands to print the special registers and to ask the
hardware to perform address translation for us. These are useful to help
track down what caused us to enter the debugger.

Sponsored by:	ABT Systems Ltd
2015-09-05 17:29:07 +00:00
Andrew Turner
504a0067c7 Add support for the dwc usb in the HiSilicon hi6220 in the HiKey board. For
this we need to force the driver into host mode, as without this the driver
fails to detect any devices.

Relnotes:	yes
Sponsored by:	ABT Systems Ltd
2015-09-01 17:13:04 +00:00
Andrew Turner
c0e5e17237 Add support for the DesignWare MMC hardware in the HiSilicon hi6220. This
SoC is used in the HiKey board from 96boards.

Currently on the SD card is working on the HiKey, as such devices 0 and 2
will need to be disabled, for example by adding the following to
loader.conf:

hint.hisi_dwmmc.0.disabled=1
hint.hisi_dwmmc.2.disabled=1

Relnotes:	yes (Hikey board booting)
Sponsored by:	ABT Systems Ltd
2015-09-01 16:25:12 +00:00
Andrew Turner
bbbde6d844 Add the SOC_HISI_HI6220 option. This will be used to enable drivers for
the HiSilicon hi6220 SoC used in the HiKey 96boards board.

Sponsored by:	ABT Systems Ltd
2015-08-26 18:09:17 +00:00
Zbigniew Bodek
bb2295eb2c Fix race condition in its_cmd_send()
its_cmd_send() can be called by multiple CPUs simultaneously.
After the command is pushed to ITS command ring the completion
status is polled using global pointer to the next free ring slot.
Use copied pointer and provide correct locking to avoid spurious
pointer value when concurrent access occurs.

Obtained from: Semihalf
Sponsored by:  The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3436
2015-08-26 12:32:46 +00:00
Andrew Turner
75e0dfe336 Add an option to select which SoCs we are building for. It is intended to
be used with any SoC specific drivers, for example a ThunderX nic driver
would use something like the following in files.arm64:

arm64/cavium/thunder_nic.c optional soc_cavm_thunderx thndr_nic

Reviewed by:	imp
Sponsored by:	ABT Systems Ltd
Differential Revision:	https://reviews.freebsd.org/D3479
2015-08-26 11:36:23 +00:00
Andrew Turner
ed33af42ff Add a above the virtio section. 2015-08-26 10:32:23 +00:00
Andrew Turner
7a1ac4a701 Use kdb_jmpbuf and setjmp to handle accessing invalid addresses in the
debugger memory access functions. This allows us to correctly reenter into
the debugger on failure.

Sponsored by:	ABT Systems Ltd
2015-08-25 17:02:28 +00:00
Andrew Turner
84a9a3a344 Use nitems to count the number of items in a static array.
Sponsored by:	ABT Systems Ltd
2015-08-25 16:50:25 +00:00
Andrew Turner
8f7467734a Call into kdb on a data abort when it's enabled. This is needed to
correctly handle trying to access an invalid address in the debugger.

While here document that the breakpoint handler is supposed to fall
through to the following case.

Sponsored by:	ABT Systems Ltd
2015-08-25 16:49:10 +00:00
Andrew Turner
65780a4020 Correctly update the address to write to after storing the stack pointer
in the kernels setjmp function.

Sponsored by:	ABT Systems Ltd
2015-08-25 16:43:32 +00:00
Andrew Turner
9b9266e8e7 Check the frame pointer is within the kernel before accessing it. 2015-08-24 17:28:19 +00:00
Andrew Turner
67905e0aec Add support for pmap_sync_icache on arm64.
Reviewed by:	emaste, imp (both earlier version)
Obtained from:	ABT Systems Ltd
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D3438
2015-08-24 12:01:39 +00:00
Andrew Turner
db36b645a0 Add pages used by the PV entries to minidumps. 2015-08-24 10:55:54 +00:00
Andrew Turner
0987c184a1 Handle the breakpoint instruction in userland by sending a SIGTRAP signal. 2015-08-23 13:18:56 +00:00
Andrew Turner
52afd687c3 Add the kernel support for minidumps on arm64.
Obtained from:	ABT Systems Ltd
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D3318
2015-08-20 12:49:56 +00:00
Andrew Turner
b0d415fc85 Remove pmap_kenter from pmap.h, the function doesn't exist. 2015-08-20 12:07:44 +00:00
Andrew Turner
9a0de24b5e Add pmap_get_tables to get the page tables for a given virtual address. This
will be used for minidump support.

Obtained from:	ABT Systems Ltd
Sponsored by:	The FreeBSD Foundation
2015-08-20 12:05:42 +00:00
Andrew Turner
5c714b29ff Add the arm64 minidump header. This was missed from r286953. 2015-08-20 11:26:26 +00:00
Zbigniew Bodek
a8d377b809 Increase MAXCPU in ARM64
Increase MAXCPU number to the maximum known value the existing
hardware can support.

Obtained from: Semihalf
Sponsored by:  The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3405
2015-08-19 11:59:41 +00:00
Zbigniew Bodek
04ae5bbe55 Remove redundant mp_naps from ARM64 secondary CPU start-up code
The global variable has been only used for CPU startup ordering
which is not needed anyway.

Obtained from: Semihalf
Sponsored by:  The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3296
2015-08-19 11:45:45 +00:00
Zbigniew Bodek
c50231a494 Add SMP support to GICv3 and ITS drivers
Introduce supprot for SMP to GICv3 and ITS drivers.

Obtained from: Semihalf
Sponsored by:  The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3299
2015-08-19 10:36:36 +00:00
Ed Maste
8d5bb77429 Correct comment typo noted by erik 2015-08-18 11:52:45 +00:00
Ed Maste
5a060174cd Remove register dump from arm64 el0 unknown exception
An exception with an unknown reasion is the expected result of the
attempted execution of an instruction bit pattern that has no allocated
instruction.

Sponsored by:	The FreeBSD Foundation
2015-08-18 10:07:03 +00:00
Andrew Turner
edc2af7807 Add support for bus_space_read_region and bus_space_write_region. This is
needed for the dwc USB controller driver.

Sponsored by:	ABT Systems Ltd
2015-08-14 09:55:25 +00:00
Ed Maste
13d06fd808 Remove arm64 workaround for Clang 3.4 crash 2015-08-13 19:05:18 +00:00
Ed Maste
ccd285e76c arm64: turn unknown el0 exception into a SIGILL
It seems we get EXCP_UNKNOWN from QEMU when executing zeroed memory.
Print a register dump here and signal illegal instruction. Also print
a register dump for other invalid exceptions, before panic.

Reviewed by:	andrew
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D3370
2015-08-13 13:21:00 +00:00
Andrew Turner
b1bacc1cbd Add the CNTHCTL_EL2 register bits missed in r286674 2015-08-12 17:09:57 +00:00
Andrew Turner
f03aa10f47 Set the counter-timer virtual offset to a know value, it may not have been
set by the boot code and are reset to an implementation defined value that
may be unknown.

Sponsored by:	ABT Systems Ltd
2015-08-12 17:06:22 +00:00