alc e02fd6b842 Handle spurious page faults that may occur in no-fault sections of the ... kernel. When access restrictions are added to a page table entry, we flush the corresponding virtual address mapping from the TLB. In contrast, when access restrictions are removed from a page table entry, we do not flush the virtual address mapping from the TLB. This is exactly as recommended in AMD's documentation. In effect, when access restrictions are removed from a page table entry, AMD's MMUs will transparently refresh a stale TLB entry. In short, this saves us from having to perform potentially costly TLB flushes. In contrast, Intel's MMUs are allowed to generate a spurious page fault based upon the stale TLB entry. Usually, such spurious page faults are handled by vm_fault() without incident. However, when we are executing no-fault sections of the kernel, we are not allowed to execute vm_fault(). This change introduces special-case handling for spurious page faults that occur in no-fault sections of the kernel. In collaboration with: kib Tested by: gibbs (an earlier version) I would also like to acknowledge Hiroki Sato's assistance in diagnosing this problem. MFC after: 1 week		2012-03-22 04:52:51 +00:00
..
pc
xen	Fix the netback driver build for i386.	2012-02-02 17:54:35 +00:00
_align.h	Merge amd64/i386 _align.h by aligning on the size of register_t (copied	2010-11-26 10:59:20 +00:00
_bus.h
_inttypes.h	Copy powerpc/include/_inttypes.h to x86 and replace i386/amd64/pc98	2011-01-08 18:09:48 +00:00
_limits.h	Copy amd64 _limits.h to x86 and merge with i386 _limits.h. Replace	2012-02-28 18:24:28 +00:00
_stdint.h	Copy amd64 _stdint.h to x86 and merge with i386 _stdint.h. Replace	2012-02-28 18:38:33 +00:00
_types.h	Copy amd64 _types.h to x86 and merge with i386 _types.h. Replace existing	2012-02-28 18:15:28 +00:00
acpica_machdep.h	Extract the code to find and map the MADT ACPI table during early kernel	2009-09-23 15:42:35 +00:00
apicvar.h	Remove completely duplicate '#ifdef XEN' section.	2012-02-27 17:30:21 +00:00
apm_bios.h	Move identical copies of apm_bios.h to sys/x86/include, replace them with	2010-11-11 19:36:21 +00:00
apm_segments.h
asm.h	Also import WEAK_ALIAS() from the MIPS code.	2012-01-05 08:51:06 +00:00
asmacros.h
atomic.h	Implement atomic_load_acq_64(9) and atomic_store_rel_64(9) for i386. These	2011-04-06 23:59:59 +00:00
bootinfo.h	Add EFI boot info fields.	2010-04-07 18:52:51 +00:00
bus_dma.h
bus.h	Merge amd64 and i386 bus.h and move the resulting header to x86. Replace	2010-12-20 16:39:43 +00:00
clock.h	MFC	2011-05-09 18:53:13 +00:00
cpu.h	Use cpu_ticks() for get_cyclecount(9) rather than checking existence of TSC	2011-04-04 22:56:33 +00:00
cpufunc.h	Correct cpu_monitor() and cpu_mwait() for amd64. These instructions take	2011-07-05 18:42:10 +00:00
cputypes.h
cserial.h
db_machdep.h
elan_mmcr.h
elf.h	Add AT_STACKPROT elf aux vector. Will be used to inform rtld about the	2011-01-07 14:22:34 +00:00
endian.h	Copy amd64 endian.h to x86 and merge with i386 endian.h. Replace	2012-02-28 19:39:54 +00:00
exec.h
float.h	Copy amd64 float.h to x86 and merge with i386 float.h. Replace	2012-03-04 14:00:32 +00:00
floatingpoint.h
frame.h
gdb_machdep.h
ieeefp.h	People porting FreeBSD to new architectures ought not have to	2011-10-21 06:41:46 +00:00
if_wl_wavelan.h
in_cksum.h
intr_machdep.h	Allow a native i386 kernel to be built with 'nodevice atpic'. Just as on	2012-03-09 19:42:48 +00:00
ioctl_bt848.h
ioctl_meteor.h
iodev.h	- Extract the IODEV_PIO interface from ia64 and make it MI.	2010-04-28 15:38:01 +00:00
kdb.h
legacyvar.h
limits.h
md_var.h	Remove unused i586 optimized bcopy/bzero/etc implementations that utilize	2010-06-23 10:40:28 +00:00
memdev.h	Add reader/writer lock around mem_range_attr_get() and mem_range_attr_set().	2011-01-17 22:58:28 +00:00
metadata.h
minidump.h
mp_watchdog.h
nexusvar.h
npx.h	Move userland bits of i386 npx.h and amd64 fpu.h to x86 fpu.h.	2012-03-16 20:24:30 +00:00
param.h	Add the possibility to specify from kernel configs MAXCPU value.	2011-07-19 00:37:24 +00:00
pcaudioio.h	Convert files to UTF-8	2012-01-15 13:23:18 +00:00
pcb_ext.h
pcb.h	Remove the support for int13 FPU exception reporting on i386. It is	2010-06-23 11:12:58 +00:00
pci_cfgreg.h	Move {amd64,i386}/pci/pci_bus.c and {amd64,i386}/include/pci_cfgreg.h to	2011-06-22 21:04:13 +00:00
pcpu.h	Make "options XENHVM" compile for i386, not just amd64 -- a largely	2011-01-04 14:49:54 +00:00
perfmon.h
pmap.h	Commit the support for removing cpumask_t and replacing it directly with	2011-05-05 14:39:14 +00:00
pmc_mdep.h	- Support for uncore counting events: one fixed PMC with the uncore	2010-04-02 13:23:49 +00:00
ppireg.h
privatespace.h
proc.h	Handle spurious page faults that may occur in no-fault sections of the	2012-03-22 04:52:51 +00:00
profile.h	Use intr_disable() and intr_restore() instead of frobbing the flags register	2010-10-25 15:28:03 +00:00
psl.h	Copy i386 psl.h to x86 and replace amd64/i386/pc98 psl.h with stubs.	2012-03-19 21:29:57 +00:00
ptrace.h	Copy amd64 ptrace.h to x86 and merge with i386 ptrace.h. Replace	2012-03-04 20:24:28 +00:00
reg.h	Copy i386 reg.h to x86 and merge with amd64 reg.h. Replace i386/amd64/pc98	2012-03-18 19:06:38 +00:00
reloc.h
resource.h
runq.h
segments.h	Move userland bits (and some common kernel bits) from amd64 and i386	2012-03-19 21:24:50 +00:00
setjmp.h	Copy amd64 setjmp.h to x86 and replace amd64/i386/pc98 setjmp.h with stubs.	2012-02-28 22:17:52 +00:00
sf_buf.h	Commit the support for removing cpumask_t and replacing it directly with	2011-05-05 14:39:14 +00:00
sigframe.h
signal.h	Synchronize the struct sigcontext definitions on x86 with mcontext_t.	2012-01-30 07:51:52 +00:00
smapi.h
smp.h	remove code for dynamic offlining/onlining of CPUs on x86	2011-06-08 08:12:15 +00:00
speaker.h
specialreg.h	Copy i386 specialreg.h to x86 and merge with amd64 specialreg.h. Replace	2012-03-19 21:34:11 +00:00
stack.h
stdarg.h	Copy amd64 stdarg.h to x86 and replace amd64/i386/pc98 stdarg.h with stubs.	2012-02-28 22:30:58 +00:00
sysarch.h	Copy amd64 sysarch.h to x86 and merge with i386 sysarch.h. Replace	2012-03-19 21:57:31 +00:00
timerreg.h
trap.h	Copy amd64 trap.h to x86 and replace amd64/i386/pc98 trap.h with stubs.	2012-03-04 14:12:57 +00:00
tss.h
ucontext.h	Add support for the extended FPU states on amd64, both for native	2012-01-21 17:45:27 +00:00
varargs.h
vm86.h	Increase maximum number of page table entries per VM86 context from 8 to 24	2010-08-25 21:13:23 +00:00
vm.h
vmparam.h	Avoid the possibility of integer overflow in the calculation of	2011-12-10 18:42:00 +00:00
xbox.h