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Re: [Qemu-devel] [RESEND PATCH v9 1/4] apic: map APIC's MMIO region at e
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [RESEND PATCH v9 1/4] apic: map APIC's MMIO region at each CPU's address space |
Date: |
Sun, 23 Aug 2015 17:55:23 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0 |
On 21/08/2015 15:54, Eduardo Habkost wrote:
> > + if (tcg_enabled()) {
> > + memory_region_add_subregion_overlap(cpu->cpu_as_root,
> > + apic->apicbase &
> > + MSR_IA32_APICBASE_BASE,
> > + &apic->io_memory,
> > + 0x1000);
>
> Why exactly is this necessary? If this is necessary, why don't we need
> to do this for non-TCG accelerators?
At least KVM and qtest do not support per-CPU address spaces. I'm not
sure about Xen, it looks like it could but it would be slower.
Paolo
- [Qemu-devel] [RESEND PATCH v9 0/4] remove icc bus/bridge, Zhu Guihua, 2015/08/19
- [Qemu-devel] [RESEND PATCH v9 1/4] apic: map APIC's MMIO region at each CPU's address space, Zhu Guihua, 2015/08/19
- Re: [Qemu-devel] [RESEND PATCH v9 1/4] apic: map APIC's MMIO region at each CPU's address space, Eduardo Habkost, 2015/08/21
- Re: [Qemu-devel] [RESEND PATCH v9 1/4] apic: map APIC's MMIO region at each CPU's address space,
Paolo Bonzini <=
- Re: [Qemu-devel] [RESEND PATCH v9 1/4] apic: map APIC's MMIO region at each CPU's address space, Peter Maydell, 2015/08/24
- Re: [Qemu-devel] [RESEND PATCH v9 1/4] apic: map APIC's MMIO region at each CPU's address space, Eduardo Habkost, 2015/08/26
- Re: [Qemu-devel] [RESEND PATCH v9 1/4] apic: map APIC's MMIO region at each CPU's address space, Paolo Bonzini, 2015/08/26
- Re: [Qemu-devel] [RESEND PATCH v9 1/4] apic: map APIC's MMIO region at each CPU's address space, Eduardo Habkost, 2015/08/26
- Re: [Qemu-devel] [RESEND PATCH v9 1/4] apic: map APIC's MMIO region at each CPU's address space, Zhu Guihua, 2015/08/27
[Qemu-devel] [RESEND PATCH v9 2/4] x86: use new method to correct reset sequence, Zhu Guihua, 2015/08/19
[Qemu-devel] [RESEND PATCH v9 3/4] cpu/apic: drop icc bus/bridge, Zhu Guihua, 2015/08/19
[Qemu-devel] [RESEND PATCH v9 4/4] icc_bus: drop the unused files, Zhu Guihua, 2015/08/19