CLFLUSHOPT is mandatory supported feature for ACRN hypervisor?
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Yoshinoya
Hi, CLFLUSHOPT is mandatory supported feature for ACRN? Is ENHANCED rep movsb/stosb aslo mandatory support? THanks. |
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Junjie Mao
Hi Yoshinoya,
ACRN hypervisor DOES assume the presence of CLFLUSHOPT as it uses that instruction to flush caches of a specific address regions.
With regard to enhanced rep movsb/stosb, I don’t think it is mandatory for ACRN hypervisor.
--- Best Regards Junjie Mao
From: acrn-dev@...
<acrn-dev@...> On Behalf Of
Yoshinoya
Sent: Wednesday, October 5, 2022 7:57 PM To: acrn-dev@... Subject: [acrn-dev] CLFLUSHOPT is mandatory supported feature for ACRN hypervisor?
Hi, CLFLUSHOPT is mandatory supported feature for ACRN?
Is ENHANCED rep movsb/stosb aslo mandatory support?
THanks.
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Yoshinoya
Hi, Junjie Got it , thanks. Is CLFLUSH not meet ACRN's some usecase? It seems, in desktop or server platform, CLFLUSH is still used in hypervisor/or linux kernel code. At 2022-10-08 09:01:14, "Junjie Mao" <junjie.mao@...> wrote:
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Junjie Mao
CLFLUSH can be a replacement of CLFLUSHOPT for cache flush operations but it may take some more time under certain circumstances due to its restrictions on ordering.
--- Best Regards Junjie Mao
From: acrn-dev@...
<acrn-dev@...> On Behalf Of
Yoshinoya
Sent: Monday, October 10, 2022 9:03 AM To: acrn-dev@... Subject: Re: [acrn-dev] CLFLUSHOPT is mandatory supported feature for ACRN hypervisor?
Hi, Junjie Got it , thanks. Is CLFLUSH not meet ACRN's some usecase?
It seems, in desktop or server platform, CLFLUSH is still used in hypervisor/or linux kernel code.
At 2022-10-08 09:01:14, "Junjie Mao" <junjie.mao@...> wrote:
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