Elliott Mitchell af610cabf1 xen/intr: adjust xen_intr_handle_upcall() to match driver filter ... 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 76acc41fb7 by Justin T. Gibbs. xen_intrcnt_init() was introduced at fd036deac1 by John Baldwin. sys/x86/xen/xen_arch_intr.c was originally created by Julien Grall in 2015 for the purpose of holding the x86 interrupt interface. Later it was found xen_intr_handle_upcall() was better earlier, and the x86 interrupt interface better later. As such the filename and header list belong to Julien Grall, but what those were created for is later. Reviewed by: royger Differential Revision: https://reviews.freebsd.org/D30006		2023-04-14 15:58:52 +02:00
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config.mk
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files	xen/efi: make Xen PV EFI clock optional	2023-04-14 15:58:47 +02:00
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files.x86	xen/intr: adjust xen_intr_handle_upcall() to match driver filter	2023-04-14 15:58:52 +02:00
kern.mk	Remove the riscv64sf architecture.	2023-04-12 11:09:27 -07:00
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