KVM: VMX: Invert handling of CR0.WP for EPT without unrestricted guest

stable inclusion
from stable-v5.10.190
commit 96c73bc9efef5d1d2a9d6a1ef0da9609f7694109
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I928UI

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=96c73bc9efef5d1d2a9d6a1ef0da9609f7694109



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[ Upstream commit ee5a5584 ]

Opt-in to forcing CR0.WP=1 for shadow paging, and stop lying about WP
being "always on" for unrestricted guest.  In addition to making KVM a
wee bit more honest, this paves the way for additional cleanup.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210713163324.627647-22-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Stable-dep-of: c4abd735 ("KVM: VMX: Don't fudge CR0 and CR4 for restricted L2 guest")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>