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The first patch is temporary workaround for #152 |
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The CI machine was updated, so I think the first commit is not required anymore. |
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Done |
acatangiu
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Nov 23, 2021
Add method to query KVM_CAP_X86_DISABLE_EXITS for x86 platforms. Signed-off-by: Liu Jiang <gerry@linux.alibaba.com>
Kvm::check_extension_int() may return negative value as error code, so Kvm::get_max_vcpus() and Kvm::get_max_vcpu_id() should handle the error cases. Signed-off-by: Liu Jiang <gerry@linux.alibaba.com>
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| /// Returns the "disable idle exiting" capability. | ||
| /// | ||
| /// The `KVM_CAP_X86_DISABLE_EXITS` capability provides userspace with per-VM capability | ||
| /// to not intercept MWAIT/HLT/PAUSE/CSTATE, which means though instructions won't cause |
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| /// to not intercept MWAIT/HLT/PAUSE/CSTATE, which means though instructions won't cause | |
| /// to not intercept MWAIT/HLT/PAUSE/CSTATE, which means such instructions won't cause |
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| assert!(disable_exits & KVM_X86_DISABLE_EXITS_HLT != 0); | ||
| assert!(disable_exits & KVM_X86_DISABLE_EXITS_PAUSE != 0); |
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Running this test on my laptop fails, should we check here for some capability before doing the asserts? Maybe this way we can also have a test case for get_disable_exits returning 0.
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| if x > 0 { | ||
| x as u32 | ||
| } else { | ||
| 0 | ||
| } |
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This can be slightly simplified.
Suggested change
| if x > 0 { | |
| x as u32 | |
| } else { | |
| 0 | |
| } | |
| u32::try_from(x).unwrap_or(0) |
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@jiangliu are you still interested in getting some of these changes merged? |
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Enhance the kvm-ioctls with: