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Re: [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_li
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From: |
Peter Maydell |
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Subject: |
Re: [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list |
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Date: |
Wed, 12 Aug 2015 14:02:23 +0100 |
On 12 August 2015 at 13:36, Paolo Bonzini <address@hidden> wrote:
>
>
> On 12/08/2015 09:31, alvise rigo wrote:
>> I think that tlb_flush_entry is not enough, since in theory another
>> vCPU could have a different TLB address referring the same phys
>> address.
>
> You're right, this is a TLB so it's virtually-indexed. :( I'm not sure
> what happens on ARM, since it has a virtually indexed (VIVT or VIPT)
> cache, but indeed it would be a problem when implementing e.g. CMPXCHG
> using the TCG ll/sc ops.
On ARM the exclusives operate on physical addresses, not virtual.
-- PMM
- [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list, (continued)
- [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list, Alvise Rigo, 2015/08/07
- Re: [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list, Paolo Bonzini, 2015/08/11
- Re: [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list, alvise rigo, 2015/08/11
- Re: [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list, Paolo Bonzini, 2015/08/11
- Re: [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list, alvise rigo, 2015/08/11
- Re: [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list, Paolo Bonzini, 2015/08/11
- Re: [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list, alvise rigo, 2015/08/12
- Re: [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list, Paolo Bonzini, 2015/08/12
- Re: [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list,
Peter Maydell <=
- Re: [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list, alvise rigo, 2015/08/12
- Re: [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list, Paolo Bonzini, 2015/08/12
- Re: [Qemu-devel] [RFC v4 1/9] exec.c: Add new exclusive bitmap to ram_list, alvise rigo, 2015/08/12
[Qemu-devel] [RFC v4 2/9] softmmu: Add new TLB_EXCL flag, Alvise Rigo, 2015/08/07
[Qemu-devel] [RFC v4 7/9] tcg-arm: Implement excl variants of qemu_{ld, st}, Alvise Rigo, 2015/08/07
[Qemu-devel] [RFC v4 8/9] tcg-aarch64: Implement excl variants of qemu_{ld, st}, Alvise Rigo, 2015/08/07
[Qemu-devel] [RFC v4 6/9] tcg-i386: Implement excl variants of qemu_{ld, st}, Alvise Rigo, 2015/08/07
[Qemu-devel] [RFC v4 9/9] target-arm: translate: Use ld/st excl for atomic insns, Alvise Rigo, 2015/08/07