Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
mshv: Add SMT_ENABLED_GUEST partition creation flag
Add support for HV_PARTITION_CREATION_FLAG_SMT_ENABLED_GUEST
to allow userspace VMMs to enable SMT for guest partitions.
Expose this via new MSHV_PT_BIT_SMT_ENABLED_GUEST flag in the UAPI.
Without this flag, the hypervisor schedules guest VPs incorrectly,
causing SMT unusable.
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
authored by
Anatol Belski
and committed by
Wei Liu
8927a108
a284dbc9
+4
+2
drivers/hv/mshv_root_main.c
+2
drivers/hv/mshv_root_main.c
···
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*pt_flags |= HV_PARTITION_CREATION_FLAG_GPA_SUPER_PAGES_ENABLED;
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if (args.pt_flags & BIT(MSHV_PT_BIT_NESTED_VIRTUALIZATION))
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*pt_flags |= HV_PARTITION_CREATION_FLAG_NESTED_VIRTUALIZATION_CAPABLE;
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+
if (args.pt_flags & BIT(MSHV_PT_BIT_SMT_ENABLED_GUEST))
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*pt_flags |= HV_PARTITION_CREATION_FLAG_SMT_ENABLED_GUEST;
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isol_props->as_uint64 = 0;
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+1
include/hyperv/hvhdk.h
+1
include/hyperv/hvhdk.h
···
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#define HV_PARTITION_ISOLATION_HOST_TYPE_RESERVED 0x2
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/* Note: Exo partition is enabled by default */
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#define HV_PARTITION_CREATION_FLAG_SMT_ENABLED_GUEST BIT(0)
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#define HV_PARTITION_CREATION_FLAG_NESTED_VIRTUALIZATION_CAPABLE BIT(1)
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#define HV_PARTITION_CREATION_FLAG_GPA_SUPER_PAGES_ENABLED BIT(4)
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#define HV_PARTITION_CREATION_FLAG_EXO_PARTITION BIT(8)