Andy Lutomirski f41f082422 x86/entry/xen: Route #DB correctly on Xen PV ... On Xen PV, #DB doesn't use IST. It still needs to be correctly routed depending on whether it came from user or kernel mode. Get rid of DECLARE/DEFINE_IDTENTRY_XEN -- it was too hard to follow the logic. Instead, route #DB and NMI through DECLARE/DEFINE_IDTENTRY_RAW on Xen, and do the right thing for #DB. Also add more warnings to the exc_debug* handlers to make this type of failure more obvious. This fixes various forms of corruption that happen when usermode triggers #DB on Xen PV. Fixes: 4c0dcd8350 ("x86/entry: Implement user mode C entry points for #DB and #MCE") Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/4163e733cce0b41658e252c6c6b3464f33fdff17.1593795633.git.luto@kernel.org		2020-07-04 19:47:25 +02:00
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asm	x86/entry/xen: Route #DB correctly on Xen PV	2020-07-04 19:47:25 +02:00
uapi/asm	Merge branch 'x86/entry' into ras/core	2020-06-11 15:17:57 +02:00