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Re: [Qemu-devel] [Qemu-ppc] Migrating decrementer

From: Mark Cave-Ayland
Subject: Re: [Qemu-devel] [Qemu-ppc] Migrating decrementer
Date: Thu, 25 Feb 2016 05:00:43 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Icedove/38.5.0 
On 25/02/16 04:33, Mark Cave-Ayland wrote:

> cpu_start/resume():
>     cpu->tb_env->tb_offset =
>         qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) * tb_env->tb_freq +
>             cpu->tb_env->tb_offset -
>         qemu_clock_get_ns(QEMU_CLOCK_HOST)

Actually just realised this is slightly wrong and in fact should be:

cpu_start/resume():
    cpu->tb_env->tb_offset =
        muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
                 cpu->tb_env->tb_freq, NANOSECONDS_PER_SECOND) +
            cpu->tb_env->tb_offset -
        qemu_clock_get_ns(QEMU_CLOCK_HOST)


ATB,

Mark.
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