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13 July 2024, 08:20:57 UTC
Revision 3c1e716508335eb132c9349cb1a1716c8f7e3d2e authored by Marc Zyngier on 19 December 2014, 16:05:31 UTC, committed by Christoffer Dall on 29 January 2015, 22:24:56 UTC 
arm/arm64: KVM: Use set/way op trapping to track the state of the caches
 
Trying to emulate the behaviour of set/way cache ops is fairly
pointless, as there are too many ways we can end-up missing stuff.
Also, there is some system caches out there that simply ignore
set/way operations.

So instead of trying to implement them, let's convert it to VA ops,
and use them as a way to re-enable the trapping of VM ops. That way,
we can detect the point when the MMU/caches are turned off, and do
a full VM flush (which is what the guest was trying to do anyway).

This allows a 32bit zImage to boot on the APM thingy, and will
probably help bootloaders in general.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
1 parent f374737
History
Tip revision: 3c1e716508335eb132c9349cb1a1716c8f7e3d2e authored by Marc Zyngier on 19 December 2014, 16:05:31 UTC
arm/arm64: KVM: Use set/way op trapping to track the state of the caches
Tip revision: 3c1e716
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.gitignore -rw-r--r-- 1.1 KB
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COPYING -rw-r--r-- 18.3 KB
CREDITS -rw-r--r-- 94.0 KB
Kbuild -rw-r--r-- 2.5 KB
Kconfig -rw-r--r-- 252 bytes
MAINTAINERS -rw-r--r-- 291.9 KB
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REPORTING-BUGS -rw-r--r-- 7.3 KB

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