Backport subject : KVM相关上游fixup和功能的backport

[fangyu0809]

整理前面我们在上游社区提交的KVM相关fixup和功能patch，确认在rvck有效果的patch进行backport

https://lore.kernel.org/r/20250807070729.89701-1-fangyu.yu@linux.alibaba.com
https://lore.kernel.org/r/20250821142542.2472079-2-guoren@kernel.org
https://lore.kernel.org/r/20250821142542.2472079-3-guoren@kernel.org
https://lore.kernel.org/r/20250821142542.2472079-4-guoren@kernel.org
https://lore.kernel.org/r/20251016012659.82998-1-fangyu.yu@linux.alibaba.com
https://lore.kernel.org/r/20251021142131.78796-1-fangyu.yu@linux.alibaba.com
https://lore.kernel.org/r/20251121133543.46822-1-fangyu.yu@linux.alibaba.com