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[6.6]Hygon: Support reuse ASID feature for Hygon CSV #373

Merged
merged 1 commit into from
Aug 19, 2024
Merged

[6.6]Hygon: Support reuse ASID feature for Hygon CSV #373

merged 1 commit into from
Aug 19, 2024

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wojiaohanliyang
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Description:

  1. More convenient way to use one ASID for many memory encrypted guest.

KVM: SVM: Add support for different CSV guests to reuse the same ASID
c9a6cb6 
hygon inclusion
category: feature
CVE: NA

---------------------------

If user want to reuse one ASID for many CSV guests, he should provide a
label (i.e. userid) and the length of the label when launch CSV guest.
The reference count of the ASID will be increased if user launch a CSV
guest with the label correspond to the ASID. When a CSV guest which
launch with a label is destroyed, the reference count of the ASID
correspond to the label will be decreased, and the ASID is freed only if
the reference count becomes zero.

The codes for reuse ASID is not compatible with CONFIG_CGROUP_MISC, we
introduce CONFIG_KVM_SUPPORTS_CSV_REUSE_ASID that depends on
!CGROUP_MISC, the code take effect only when
CONFIG_KVM_SUPPORTS_CSV_REUSE_ASID=y.

Signed-off-by: hanliyang <[email protected]>
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Hi @wojiaohanliyang. Thanks for your PR.

I'm waiting for a deepin-community member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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@Avenger-285714 Avenger-285714 merged commit e6a2519 into deepin-community:linux-6.6.y Aug 19, 2024
2 of 5 checks passed
@wojiaohanliyang wojiaohanliyang deleted the linux-6.6.y-reuse-asid branch August 19, 2024 11:56
@MingcongBai MingcongBai mentioned this pull request Aug 20, 2024
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@wojiaohanliyang @deepin-ci-robot @Avenger-285714