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Re: [Qemu-devel] running out of Arm TB flags...
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From: |
Richard Henderson |
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Subject: |
Re: [Qemu-devel] running out of Arm TB flags... |
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Date: |
Tue, 19 Mar 2019 08:55:11 -0700 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 |
On 3/19/19 8:06 AM, Paolo Bonzini wrote:
>> Given how many guests use the cs_base I wonder if it's time we came up
>> with a better name for it: extra_tb_state, extra_state, moar_bits...
>
> Or make the flags 64-bits by moving cs_base into the upper 32-bits of
> flags... This way 32-bit hosts do not see any difference.
At least a couple of the guests use cs_base as "next pc", in order to implement
delayed branches. So we do already use all 64-bits of the cs_base field, in
addition to the 32-bits of the flags field.
r~