xen_intr_handle_upcall() has two interfaces. It needs to be called by the x86 assembly code invoked by the APIC. Second, it needs to be called as a driver_filter_t for the XenPCI code and for architectures besides x86. Unfortunately the driver_filter_t interface was implemented as a wrapper around the x86-APIC interface. Now create a simple wrapper for the x86-APIC code, which calls an architecture-independent xen_intr_handle_upcall(). When called via intr_event_handle(), driver_filter_t functions expect preemption to be disabled. This removes the need for critical_enter()/critical_exit() when called this way. The lapic_eoi() call is only needed on x86 in some cases when invoked directly as an APIC vector handler. Additionally driver_filter_t functions have no need to handle interrupt counters. The intrcnt_add() calling function was reworked to match the current situation. intrcnt_add() is now only called via one path. The increment/decrement of curthread->td_intr_nesting_level had previously been left out. Appears this was mostly harmless, but this was noticed during implementation and has been added. CONFIG_X86 is a leftover from use with Linux. While the barrier isn't needed for FreeBSD on x86, it will be needed for FreeBSD on other architectures. Copyright note. xen_intr_intrcnt_add() was introduced at |
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.. | ||
config.mk | ||
dtb.build.mk | ||
dtb.mk | ||
files | ||
files.amd64 | ||
files.arm | ||
files.arm64 | ||
files.i386 | ||
files.powerpc | ||
files.riscv | ||
files.x86 | ||
kern.mk | ||
kern.opts.mk | ||
kern.post.mk | ||
kern.pre.mk | ||
kmod_syms_prefix.awk | ||
kmod_syms.awk | ||
kmod.mk | ||
kmod.opts.mk | ||
ldscript.amd64 | ||
ldscript.arm | ||
ldscript.arm64 | ||
ldscript.i386 | ||
ldscript.kmod.amd64 | ||
ldscript.kmod.i386 | ||
ldscript.powerpc | ||
ldscript.powerpc64 | ||
ldscript.powerpc64le | ||
ldscript.powerpcspe | ||
ldscript.riscv | ||
Makefile.amd64 | ||
Makefile.arm | ||
Makefile.arm64 | ||
Makefile.i386 | ||
Makefile.powerpc | ||
Makefile.riscv | ||
newvers.sh | ||
NOTES | ||
options | ||
options.amd64 | ||
options.arm | ||
options.arm64 | ||
options.i386 | ||
options.powerpc | ||
options.riscv | ||
std.nodebug | ||
sysent.mk | ||
systags.sh | ||
vdso_amd64_ia32.ldscript | ||
vdso_amd64.ldscript | ||
WITHOUT_SOURCELESS | ||
WITHOUT_SOURCELESS_HOST | ||
WITHOUT_SOURCELESS_UCODE |