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Date: Wed, 16 Jun 2010 07:40:47 +0300
From: Gleb Natapov <gleb@redhat.com>
Message-ID: <20100616044047.GF13238@redhat.com>
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Subject: [Qemu-devel] Re: [PATCH] hpet: Clean up initial hpet counter
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To: Jan Kiszka <jan.kiszka@web.de>
Cc: qemu-devel <qemu-devel@nongnu.org>

On Wed, Jun 16, 2010 at 12:40:28AM +0200, Jan Kiszka wrote:
> From: Jan Kiszka <jan.kiszka@siemens.com>
> 
> There is no need starting with the special value for hpet_cfg.count.
> Either Seabios is aware of the new firmware interface and properly
> interprets the counter or it simply ignores it anyway.
> 
I want seabios to be able to distinguish between old qemu and new one.
Hence special value. I used it incorrectly in may v2 seabios patch. Will
resend asap. Will teach me to not change logic at the last minute :( I
removed "valid" field between v1 and v2 of the patches and introduces
special value for count instead. As a result I made one bug in qemu and
one is seabios. Heh.

> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
> ---
>  hw/hpet.c |    7 +------
>  1 files changed, 1 insertions(+), 6 deletions(-)
> 
> diff --git a/hw/hpet.c b/hw/hpet.c
> index d5c406c..ed4e995 100644
> --- a/hw/hpet.c
> +++ b/hw/hpet.c
> @@ -74,7 +74,7 @@ typedef struct HPETState {
>      uint8_t  hpet_id;           /* instance id */
>  } HPETState;
>  
> -struct hpet_fw_config hpet_cfg = {.count = UINT8_MAX};
> +struct hpet_fw_config hpet_cfg;
>  
>  static uint32_t hpet_in_legacy_mode(HPETState *s)
>  {
> @@ -682,11 +682,6 @@ static int hpet_init(SysBusDevice *dev)
>      int i, iomemtype;
>      HPETTimer *timer;
>  
> -    if (hpet_cfg.count == UINT8_MAX) {
> -        /* first instance */
> -        hpet_cfg.count = 0;
> -    }
> -
>      if (hpet_cfg.count == 8) {
>          fprintf(stderr, "Only 8 instances of HPET is allowed\n");
>          return -1;
> -- 
> 1.6.0.2

--
			Gleb.