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[ARM] 4111/1: Allow VFP to work with thread migration on SMP

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The current lazy saving of the VFP registers is no longer possible
with thread migration on SMP. This patch implements a per-CPU
vfp-state pointer and the saving of the VFP registers at every context
switch. The registers restoring is still performed in a lazy way.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Catalin Marinas
2007-01-24 18:47:08 +01:00
committed by Russell King
parent 412489af76
commit c642846489
5 changed files with 58 additions and 6 deletions
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1
arch/arm/vfp/entry.S
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@@ -25,6 +25,7 @@
do_vfp:
enable_irq
ldr r4, .LCvfp
ldr r11, [r10, #TI_CPU] @ CPU number
add r10, r10, #TI_VFPSTATE @ r10 = workspace
ldr pc, [r4] @ call VFP entry point