freebsd-dev/sys/x86/include
Konstantin Belousov 2a508645b4 pci_cfgreg.c: Use io port config access for early boot time.
Some early PCIe chipsets are explicitly listed in the white-list to
enable use of the MMIO config space accesses, perhaps because ACPI
tables were not reliable source of the base MCFG address at that time.
For that chipsets, MCFG base was read from the known chipset MCFGbase
config register.

During very early stage of boot, when access to the PCI config space
is performed (see e.g. pci_early_quirks.c), we cannot map 255MB of
registers because the method used with pre-boot pmap overflows initial
kernel page tables.

Move fallback to read MCFGbase to the attachment method of the
x86/legacy device, which removes code duplication, and results in the
use of io accesses until MCFG is parsed or legacy attach called.

For amd64, pre-initialize cfgmech with CFGMECH_1, right now we
dynamically assign CFGMECH_1 to it anyway, and remove checks for
CFGMECH_NONE.

There is a mention in the Intel documentation for corresponding
chipsets that OS must use either io port or MMIO access method, but we
already break this rule by reading MCFGbase register, so one more
access seems to be innocent.

Reported by:	longwitz@incore.de
PR:	236838
Reviewed by:	avg (other version), jhb
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D19833
2019-04-09 18:07:17 +00:00
..
xen
_align.h spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
_inttypes.h sys/x86: further adoption of SPDX licensing ID tags. 2017-11-27 15:11:47 +00:00
_limits.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
_stdint.h sys/x86: further adoption of SPDX licensing ID tags. 2017-11-27 15:11:47 +00:00
_types.h i386: Merge PAE and non-PAE pmaps into same kernel. 2019-01-30 02:07:13 +00:00
acpica_machdep.h sys/x86: further adoption of SPDX licensing ID tags. 2017-11-27 15:11:47 +00:00
apicreg.h sys/x86: further adoption of SPDX licensing ID tags. 2017-11-27 15:11:47 +00:00
apicvar.h Drop "All rights reserved" from my copyright statements. 2019-03-06 22:11:45 +00:00
apm_bios.h
bus_dma.h
bus.h amd64: Add a 48-bit MAXADDR constant 2018-01-13 17:55:22 +00:00
busdma_impl.h x86 busdma: fix mis-use of bus_addr_t where vm_paddr_t is assumed. 2019-01-18 13:38:56 +00:00
cputypes.h
dump.h
elf.h Consolidate identical ELF auxargs type defintions. 2018-10-22 22:24:32 +00:00
endian.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
fdt.h sys/x86: further adoption of SPDX licensing ID tags. 2017-11-27 15:11:47 +00:00
float.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
fpu.h
frame.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
ifunc.h Update x86/ifunc.h. 2018-09-30 16:57:30 +00:00
init.h x86: improve reservation of AP trampoline memory 2018-04-05 14:39:51 +00:00
intr_machdep.h Drop "All rights reserved" from my copyright statements. 2019-03-06 22:11:45 +00:00
legacyvar.h sys/x86: further adoption of SPDX licensing ID tags. 2017-11-27 15:11:47 +00:00
mca.h sys/x86: further adoption of SPDX licensing ID tags. 2017-11-27 15:11:47 +00:00
metadata.h
mptable.h sys/x86: further adoption of SPDX licensing ID tags. 2017-11-27 15:11:47 +00:00
ofw_machdep.h sys/x86: further adoption of SPDX licensing ID tags. 2017-11-27 15:11:47 +00:00
pci_cfgreg.h pci_cfgreg.c: Use io port config access for early boot time. 2019-04-09 18:07:17 +00:00
procctl.h amd64 KPTI: add control from procctl(2). 2019-03-16 11:44:33 +00:00
psl.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
ptrace.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
pvclock.h
reg.h Cleanups related to debug exceptions on x86. 2018-05-22 00:45:00 +00:00
segments.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
setjmp.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
sigframe.h sys/x86: further adoption of SPDX licensing ID tags. 2017-11-27 15:11:47 +00:00
signal.h Remove very old and unused signal information codes. 2018-03-27 20:57:51 +00:00
specialreg.h Add symbolic name for TSC_AUX MSR address. 2019-03-15 16:39:05 +00:00
stack.h
stdarg.h Introduce an architecture-agnostic <sys/_stdarg.h> to reduce 2017-12-25 20:54:00 +00:00
sysarch.h Add usermode helpers for for Intel userspace protection keys feature. 2019-02-20 09:56:23 +00:00
trap.h Remove very old and unused signal information codes. 2018-03-27 20:57:51 +00:00
ucode.h Log a message after a successful boot-time microcode update. 2018-09-14 17:04:36 +00:00
ucontext.h Fix a typo. 2018-03-19 17:14:56 +00:00
vdso.h sys/x86: further adoption of SPDX licensing ID tags. 2017-11-27 15:11:47 +00:00
vmware.h
x86_smp.h x86: improve reservation of AP trampoline memory 2018-04-05 14:39:51 +00:00
x86_var.h Port sysctl kern.elf32.read_exec from amd64 to i386. 2019-02-07 02:17:34 +00:00