Andrew Turner ad020198ff Stop performing a full icache sync when the DIC and IDC flags are set ... The DIC and IDC bits in the CTR_EL0 register signal to the kernel when it can relax the instruction cache synchronisation operations. The IDC bit means we can relax cleaning the data cache to the point of unification while the DIC bit means we don't need to invalidate the instruction cache for data coherence. In both cases an appropriate barrier is still needed. For now only implement the case where both bits are set, as is the case on the Neoverse-N1 as used in the Amazon AWS Graviton 2 CPU. Note that this behaviour is a optional on the N1 so we may later need to implement only one or the other bit being set. There is a tunable to disable each flag on boot. Testing on a 4 core Graviton 2 instance found a significant improvement in sys and real time when running "make buildkernel -j4", with no significant difference in user time. Reviewed by: markj Sponsored by: Innovate UK Differential Revision: https://reviews.freebsd.org/D24853		2020-05-19 16:04:27 +00:00
..
_align.h
_bus.h	Regularize my copyright notice	2019-12-04 16:56:11 +00:00
_inttypes.h
_limits.h
_stdint.h
_types.h	Do not include float interfaces when using libsa.	2018-02-23 04:04:25 +00:00
acpica_machdep.h
armreg.h	Add more are64 special register fields	2020-03-06 16:00:35 +00:00
asm.h	Stop speculation past an eret instruction	2019-12-19 08:52:16 +00:00
atomic.h	Expand generic subword atomic primitives	2020-03-25 23:12:43 +00:00
bus_dma_impl.h	Allow loading the same DMA address multiple times without any prior	2019-05-16 17:41:16 +00:00
bus_dma.h	Allow loading the same DMA address multiple times without any prior	2019-05-16 17:41:16 +00:00
bus.h	Add genet driver for Raspberry Pi 4B Ethernet	2020-04-22 00:42:10 +00:00
clock.h
counter.h	Centralize __pcpu definitions.	2019-08-29 07:25:27 +00:00
cpu.h	Move the arm64 cache identification to identcpu.c	2020-03-03 15:25:01 +00:00
cpufunc.h	Stop performing a full icache sync when the DIC and IDC flags are set	2020-05-19 16:04:27 +00:00
csan.h	Add kcsan_md_unsupported from NetBSD.	2019-11-21 13:22:23 +00:00
db_machdep.h
debug_monitor.h	Move the struct debug_monitor_state out of _KERNEL.	2019-11-03 22:17:49 +00:00
disassem.h
dump.h
efi.h	Catch exceptions during EFI RT calls on amd64.	2018-09-02 21:37:05 +00:00
elf.h	gcore: Add aarch64 32-bit core support	2019-10-11 14:15:50 +00:00
endian.h	Add parentheses missed in r320388	2017-06-27 16:30:01 +00:00
exec.h
float.h
floatingpoint.h
fpu.h	Add machine/fpu.h on arm64 for compatibility with amd64.	2017-10-10 13:02:58 +00:00
frame.h	Impleent COMPAT_FREEBSD32 for arm64.	2019-01-13 19:49:46 +00:00
hypervisor.h	Update the hypervisor registers	2020-03-06 14:46:50 +00:00
ieeefp.h
ifunc.h	Remove resolver_qual from DEFINE_IFUNC/DEFINE_UIFUNC macros.	2019-05-16 22:20:54 +00:00
in_cksum.h
intr.h	Create macros for the ACPI interrupt cross references. This is considered a	2018-03-07 13:16:03 +00:00
iodev.h
kdb.h
machdep.h	Mark the arm64 machdep.h as kernel only	2020-03-05 10:52:16 +00:00
md_var.h
memdev.h
metadata.h	loader.efi: Make framebuffer commands available for arm64	2017-10-25 18:55:04 +00:00
minidump.h
ofw_machdep.h
param.h	Define MAXCPU consistently between the kernel and KLDs.	2020-02-05 19:08:21 +00:00
pcb.h	Add support for setting hardware breakpoints from ptrace on arm64.	2019-11-03 15:42:08 +00:00
pci_cfgreg.h
pcpu_aux.h	Centralize __pcpu definitions.	2019-08-29 07:25:27 +00:00
pcpu.h	Utilize ASIDs to reduce both the direct and indirect costs of context	2019-11-03 17:45:30 +00:00
pmap.h	Generalise the arm64 ASID allocator.	2020-02-26 11:50:24 +00:00
pmc_mdep.h
proc.h	Utilize ASIDs to reduce both the direct and indirect costs of context	2019-11-03 17:45:30 +00:00
procctl.h	amd64 KPTI: add control from procctl(2).	2019-03-16 11:44:33 +00:00
profile.h	SPDX: Consider code from Carnegie-Mellon University.	2017-11-30 15:48:35 +00:00
psl.h
pte.h	Split out the stage 1 pte bits and add the stage 2 bits	2020-02-24 16:45:31 +00:00
ptrace.h
reg.h	Add support for setting hardware breakpoints from ptrace on arm64.	2019-11-03 15:42:08 +00:00
reloc.h
resource.h
runq.h
setjmp.h
sf_buf.h
sigframe.h	Follow arm[32] and sparc64 KAPI and provide the FreeBSD standard spelling	2019-01-29 20:10:27 +00:00
signal.h
smp.h
stack.h
stdarg.h	Introduce an architecture-agnostic <sys/_stdarg.h> to reduce	2017-12-25 20:54:00 +00:00
sysarch.h
trap.h
ucontext.h	Impleent COMPAT_FREEBSD32 for arm64.	2019-01-13 19:49:46 +00:00
undefined.h	Allow the userspace ID register fields to be read from the kernel	2019-10-30 13:45:40 +00:00
vdso.h	Add rudimentary support for building FreeBSD/arm64 with COMPAT_FREEBSD32.	2017-11-24 13:50:53 +00:00
vfp.h	Impleent COMPAT_FREEBSD32 for arm64.	2019-01-13 19:49:46 +00:00
vm.h
vmparam.h	Eliminate an unused declaration. The variable in question is only defined	2019-10-07 04:22:03 +00:00