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CVS commit: src/sys/arch

Module Name:    src
Committed By:   riastradh
Date:           Fri Apr  1 19:57:22 UTC 2022

Modified Files:
        src/sys/arch/aarch64/aarch64: fpu.c
        src/sys/arch/arm/vfp: vfp_init.c
        src/sys/arch/x86/x86: cpu.c fpu.c

Log Message:
x86, arm: Allow fpu_kern_enter/leave while cold.

Normally these are forbidden above IPL_VM, so that FPU usage doesn't
block IPL_SCHED or IPL_HIGH interrupts.  But while cold, e.g. during
builtin module initialization at boot, all interrupts are blocked
anyway so it's a moot point.

Also initialize x86 cpu_info_primary.ci_kfpu_spl to -1 so we don't
trip over an assertion about it while cold -- the assertion is meant
to detect reentrance into fpu_kern_enter/leave, which is prohibited.

Also initialize cpu0's ci_kfpu_spl.

To generate a diff of this commit:
cvs rdiff -u -r1.11 -r1.12 src/sys/arch/aarch64/aarch64/fpu.c
cvs rdiff -u -r1.76 -r1.77 src/sys/arch/arm/vfp/vfp_init.c
cvs rdiff -u -r1.202 -r1.203 src/sys/arch/x86/x86/cpu.c
cvs rdiff -u -r1.76 -r1.77 src/sys/arch/x86/x86/fpu.c

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

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