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Re: [PATCH] MIPS - fix cycle counter timing calculations
From: |
Philippe Mathieu-Daudé |
Subject: |
Re: [PATCH] MIPS - fix cycle counter timing calculations |
Date: |
Mon, 13 Dec 2021 11:10:57 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.3.0 |
On 11/16/21 08:26, Simon Burge wrote:
> The cp0_count_ns value is calculated from the CP0_COUNT_RATE_DEFAULT
> constant in target/mips/cpu.c. The cycle counter resolution is defined
> per-CPU in target/mips/cpu-defs.c.inc; use this value for calculating
> cp0_count_ns. Fixings timing problems on guest OSs for the 20Kc CPU
> which has a CCRes of 1.
> ---
> target/mips/cpu.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
Good catch. Too bad you didn't Cc'ed the maintainers, this patch
would have been in the 6.2 release.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Queued to mips-next.
- Re: [PATCH] MIPS - fix cycle counter timing calculations,
Philippe Mathieu-Daudé <=