[PATCH 2/5] cpufreq: loongson3: Adjust the width of id and val in smc_message
Huacai Chen <[email protected]>
| Newsgroups | dev.linux.lists.loongarch,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pm,org.kernel.vger.stable |
|---|---|
| Message-ID | <[email protected]> |
The id field of smc_message is usually stand for the CPU ID. In the past this driver was only tested for desktop and laptop productions so 4-bits are enough. But now we have servers that can have as many as 256 cores, so we need 8-bits CPU ID. On the other hand, the val field is usually stand for CPU frequency so 12-bits are enough to represent 4GHz, and for higher frequencies there is an extra bit to extend (enough for 8GHz). In theory, this is a incompatible change, but fortunately the old SMC firmwares are not widely shipped and can be updated on the air, thus we can safely adjust the widths. Cc: [email protected] Signed-off-by: Hongliang Wang <[email protected]> Signed-off-by: Huacai Chen <[email protected]> --- drivers/cpufreq/loongson3_cpufreq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/loongson3_cpufreq.c b/drivers/cpufreq/loongson3_cpufreq.c index 1e8715ea1b77..630f679aa739 100644 --- a/drivers/cpufreq/loongson3_cpufreq.c +++ b/drivers/cpufreq/loongson3_cpufreq.c @@ -21,9 +21,9 @@ union smc_message { u32 value; struct { - u32 id : 4; + u32 id : 8; u32 info : 4; - u32 val : 16; + u32 val : 12; u32 cmd : 6; u32 extra : 1; u32 complete : 1; -- 2.52.0