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在 Laszlo Ersek <ler...@redhat.com>，2015年4月9日 下午8:27写道：On 04/09/15 13:28, Ard Biesheuvel wrote:
> This updates ArmVirtualizationMemoryInitPeiLib so that the PEI memory
> region, i.e., the region that is used both before and after the MMU
> and caches are enabled, is invalidated by virtual address before
> enabling the MMU.
>
> This prevents issues where data we modified with the caches and MMU
> off may be shadowed by clean cachelines in system caches or in lower
> level caches on other CPUs, resulting in the this data to become
> invisible once we turn the MMU and caches on.
>
> Also reduce the size of the region to 16 MB (from 64 MB), to reduce
> the potential performance hit from invalidating the entire region by
> virtual address.
>
> Contributed-under: TianoCore Contribution Agreement 1.0
> Reviewed-By: Olivier Martin <olivier.mar...@arm.com>
> Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
> ---
> ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationMemoryInitPeiLib/ArmVirtualizationMemoryInitPeiLib.c | 10 ++++++++++
> ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationMemoryInitPeiLib/ArmVirtualizationMemoryInitPeiLib.inf | 1 +
> 2 files changed, 11 insertions(+)
Reviewed-by: Laszlo Ersek <ler...@redhat.com>
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