CVS commit: src/sys/arch/amd64/amd64

["Manuel Bouyer" <bouyer%netbsd.org@localhost>]

Module Name:    src
Committed By:   bouyer
Date:           Sun Jun 21 16:57:18 UTC 2020

Modified Files:
        src/sys/arch/amd64/amd64: amd64_trap.S locore.S

Log Message:
On amd64, Xen PV calls syscalls and traps with events enabled.
Disable events on entry to be safe.
It should have been mostly safe for most cases, but for FPU traps
we need to reload the FPU state if we got interrupted at trap entry.

Hopefully fixes:
panic: kernel diagnostic assertion "curlwp->l_md.md_flags & MDL_FPU_IN_CPU" failed: file "/home/source/ab/HEAD/src/sys/arch/x86/x86/fpu.c", line 524

when running tests.


To generate a diff of this commit:
cvs rdiff -u -r1.51 -r1.52 src/sys/arch/amd64/amd64/amd64_trap.S
cvs rdiff -u -r1.209 -r1.210 src/sys/arch/amd64/amd64/locore.S

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.