[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [RFC] Memory API
From: |
Jan Kiszka |
Subject: |
Re: [Qemu-devel] [RFC] Memory API |
Date: |
Wed, 18 May 2011 18:42:23 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2011-05-18 18:21, Avi Kivity wrote:
> On 05/18/2011 06:26 PM, Avi Kivity wrote:
>>> This is about registration. Right now you can only register IO
>>> intercepts in the chipset, not on a per-CPU basis. We could just as
>>> easily have:
>>>
>>> CPUState {
>>> MemoryRegion apic_region;
>>> };
>>>
>>> per_cpu_register_memory(env, &env->apic_region);
>>>
>>
>>
>> Right. Or all memory per-cpu, with two sub-regions:
>>
>> - global memory
>> - overlaid apic memory
>>
>> for this, we need to have well defined semantics for overlap (perhaps
>> a priority argument to memory_region_add_subregion).
>
> Or even
>
> cpu_memory_region
> |
> +-- global memory map (prio 0)
> | |
> | +-- RAM (prio 0)
> | |
> | +-- PCI (prio 1)
It depends on the chipset and its configuration (via PAM e.g.) in what
region which takes precedence. Fixed prios do not help here.
> |
> +-- SMM memory (if active, prio 1)
> |
> +-- APIC memory (if active, prio 2)
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
- Re: [Qemu-devel] [RFC] Memory API, (continued)
- Re: [Qemu-devel] [RFC] Memory API, Peter Maydell, 2011/05/19
- Re: [Qemu-devel] [RFC] Memory API, Anthony Liguori, 2011/05/18
- Re: [Qemu-devel] [RFC] Memory API, Avi Kivity, 2011/05/18
- Re: [Qemu-devel] [RFC] Memory API, Anthony Liguori, 2011/05/18
- Re: [Qemu-devel] [RFC] Memory API, Avi Kivity, 2011/05/18
- Re: [Qemu-devel] [RFC] Memory API, Jan Kiszka, 2011/05/18
- Re: [Qemu-devel] [RFC] Memory API, Avi Kivity, 2011/05/18
Re: [Qemu-devel] [RFC] Memory API, Anthony Liguori, 2011/05/18
- Re: [Qemu-devel] [RFC] Memory API, Avi Kivity, 2011/05/18
- Re: [Qemu-devel] [RFC] Memory API, Avi Kivity, 2011/05/18
- Re: [Qemu-devel] [RFC] Memory API,
Jan Kiszka <=
- Re: [Qemu-devel] [RFC] Memory API, Avi Kivity, 2011/05/18
- Re: [Qemu-devel] [RFC] Memory API, Anthony Liguori, 2011/05/18
- Re: [Qemu-devel] [RFC] Memory API, Jan Kiszka, 2011/05/18
Re: [Qemu-devel] [RFC] Memory API, Anthony Liguori, 2011/05/18