IPA range (41 bits) larger than the one supported by the host (40 bits)

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IPA range (41 bits) larger than the one supported by the host (40 bits)

From:	Jiatong Shen
Subject:	IPA range (41 bits) larger than the one supported by the host (40 bits)
Date:	Thu, 26 May 2022 14:40:19 +0800

Hello community,

I am trying to run qemu-system-aarch64 on a Kylin based machine, the host kernel version is 4.19. qemu is versioned 4.2.1. The command I am running is "qemu-system-aarch64 -cpu host -enable-kvm -machine virt -m size=4G,maxmem=512G". This command failed with "qemu-system-aarch64: -m and ,maxmem option values require an IPA range (41 bits) larger than the one supported by the host (40 bits)".

I am confused because 2^40 is around 1TB which is greater than 512G. Would be very appreciated to get some insights. Thank you very much for the help in advance.

Best Regards,

Jiatong Shen

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IPA range (41 bits) larger than the one supported by the host (40 bits), Jiatong Shen <=
- Re: IPA range (41 bits) larger than the one supported by the host (40 bits), Peter Maydell, 2022/05/26
  - Re: IPA range (41 bits) larger than the one supported by the host (40 bits), Jiatong Shen, 2022/05/26
    - Re: IPA range (41 bits) larger than the one supported by the host (40 bits), Jiatong Shen, 2022/05/26
    - Re: IPA range (41 bits) larger than the one supported by the host (40 bits), Peter Maydell, 2022/05/26

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