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Re: [Qemu-devel] [PATCH 06/13] target-openrisc: Remove TLB flush from l.
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From: |
Max Filippov |
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Subject: |
Re: [Qemu-devel] [PATCH 06/13] target-openrisc: Remove TLB flush from l.rfe instruction |
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Date: |
Wed, 30 Oct 2013 01:01:29 +0400 |
On Tue, Oct 29, 2013 at 11:04 PM, Sebastian Macke <address@hidden> wrote:
> At the moment there are two TLBs. The OpenRISC TLB followed
> by the QEMU's own TLB.
> At the end of the TLB miss handler a tlb_flush of QEMUs TLB
> is executed which is exactly what we want to avoid.
> As long as there is no context switch we don't have to flush the TLB.
So this flush was needed in order to clean QEMU TLB in case
DTLB/ITLB translation was enabled/disabled, right? But since you
already have mmu index for nommu operation, wouldn't it be easier
to indicate mmu index correctly for data and code access and drop
this flush?
--
Thanks.
-- Max
[Qemu-devel] [PATCH 03/13] target-openrisc: Separate of load/store instructions, Sebastian Macke, 2013/10/29
[Qemu-devel] [PATCH 04/13] target-openrisc: sync flags only when necessary, Sebastian Macke, 2013/10/29