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Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for
From: |
Bhushan Bharat-R65777 |
Subject: |
Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61 |
Date: |
Mon, 10 Jun 2013 09:53:10 +0000 |
> -----Original Message-----
> From: Peter Maydell [mailto:address@hidden
> Sent: Monday, June 10, 2013 2:56 PM
> To: Bhushan Bharat-R65777
> Cc: address@hidden; address@hidden; address@hidden; Wood Scott-
> B07421; Bhushan Bharat-R65777
> Subject: Re: [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for
> target_bit above 61
>
> On 10 June 2013 08:55, Bharat Bhushan <address@hidden> wrote:
> > QEMU timer supports a maximum timer of INT64_MAX. So starting timer
> > only for time which is calculated using target_bit < 62 and
> > deactivate/stop timer if the target bit is above 61.
>
> Is this really what the hardware does? Or do we need to set a timer for the
> maximum QEMU allows and then reset it for the residual time when the first
> timer
> expires?
No, this is not how hardware works. But the time with the maximum target bit of
61 (with current range of CPU frequency PowerPC supports) will be many many
years. So I think it is pretty safe to stop the timer.
Thanks
-Bharat
>
> thanks
> -- PMM
- [Qemu-ppc] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61, Bharat Bhushan, 2013/06/10
- Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61, Peter Maydell, 2013/06/10
- Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61,
Bhushan Bharat-R65777 <=
- Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61, Andreas Färber, 2013/06/10
- Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61, Bhushan Bharat-R65777, 2013/06/10
- Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61, Alexander Graf, 2013/06/10
- Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61, Scott Wood, 2013/06/10
- Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61, Alexander Graf, 2013/06/10
- Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61, Bhushan Bharat-R65777, 2013/06/11
- Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61, Alexander Graf, 2013/06/11
- Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61, Bhushan Bharat-R65777, 2013/06/11
- Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61, Alexander Graf, 2013/06/11
- Re: [Qemu-ppc] [Qemu-devel] [PATCH v2]booke: timer: Deactivate timer for target_bit above 61, Bhushan Bharat-R65777, 2013/06/11