Re: [Qemu-devel] [PATCH v2] hw: Add VMware's GETHZ command.

[Jan Kiszka]

On 2012-08-31 19:20, Don Slutz wrote:
> This is known is linux as VMWARE_PORT_CMD_GETHZ.
> 
> Signed-off-by: Don Slutz <address@hidden>
> ---
>  hw/vmport.c |   23 ++++++++++++++++++++++-
>  1 files changed, 22 insertions(+), 1 deletions(-)
> 
> diff --git a/hw/vmport.c b/hw/vmport.c
> index a4f52ee..e856255 100644
> --- a/hw/vmport.c
> +++ b/hw/vmport.c
> @@ -31,8 +31,9 @@
>  
>  #define VMPORT_CMD_GETVERSION 0x0a
>  #define VMPORT_CMD_GETRAMSIZE 0x14
> +#define VMPORT_CMD_GETHZ      0x2d
>  
> -#define VMPORT_ENTRIES 0x2c
> +#define VMPORT_ENTRIES 0x2e
>  #define VMPORT_MAGIC   0x564D5868
>  
>  typedef struct _VMPortState
> @@ -102,6 +103,25 @@ static uint32_t vmport_cmd_ram_size(void *opaque, 
> uint32_t addr)
>      return ram_size;
>  }
>  
> +static uint32_t vmport_cmd_get_hz(void *opaque, uint32_t addr)
> +{
> +    CPUX86State *env = cpu_single_env;
> +    uint64_t value;
> +    const uint32_t apicHz = 1000000000L;
> +
> +    value = (uint64_t)env->tsc_khz * 1000;
> +    if (value) {
> +        /* apic-frequency (bus speed) */
> +        env->regs[R_ECX] = apicHz;
> +        /* High part of tsc-frequency */
> +        env->regs[R_EBX] = (uint32_t)(value >> 32);
> +        /* Low part of tsc-frequency */
> +        return (uint32_t)value;
> +    } else {
> +        return env->regs[R_EAX];
> +    }
> +}
> +
>  /* vmmouse helpers */
>  void vmmouse_get_data(uint32_t *data)
>  {
> @@ -141,6 +161,7 @@ static int vmport_initfn(ISADevice *dev)
>      /* Register some generic port commands */
>      vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, NULL);
>      vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL);
> +    vmport_register(VMPORT_CMD_GETHZ, vmport_cmd_get_hz, NULL);
>      return 0;
>  }
>  
> 

Reviewed-by: Jan Kiszka <address@hidden>

-- 
Siemens AG, Corporate Technology, CT RTC ITP SDP-DE
Corporate Competence Center Embedded Linux