Paolo Bonzini fbf5015141 KVM: x86: Do not return host topology information from KVM_GET_SUPPORTED_CPUID
[ Upstream commit 45e966fcca03ecdcccac7cb236e16eea38cc18af ]

Passing the host topology to the guest is almost certainly wrong
and will confuse the scheduler.  In addition, several fields of
these CPUID leaves vary on each processor; it is simply impossible to
return the right values from KVM_GET_SUPPORTED_CPUID in such a way that
they can be passed to KVM_SET_CPUID2.

The values that will most likely prevent confusion are all zeroes.
Userspace will have to override it anyway if it wishes to present a
specific topology to the guest.

Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-01-18 11:48:57 +01:00
..
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2021-03-18 15:31:53 +01:00
2021-06-28 15:40:51 -07:00
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