[PATCH 4.17 88/97] x86/speculation: Use ARCH_CAPABILITIES to skip L1D flush on vmentry

4.17-stable review patch. If anyone has any objections, please let me know. -- From: Paolo Bonzini commit 8e0b2b916662e09dd4d09e5271cdf214c6b80e62 upstream Bit 3 of ARCH_CAPABILITIES tells a hypervisor that L1D flush on vmentry is not needed. Add a new value to enum

[PATCH 4.17 88/97] x86/speculation: Use ARCH_CAPABILITIES to skip L1D flush on vmentry

4.17-stable review patch. If anyone has any objections, please let me know. -- From: Paolo Bonzini commit 8e0b2b916662e09dd4d09e5271cdf214c6b80e62 upstream Bit 3 of ARCH_CAPABILITIES tells a hypervisor that L1D flush on vmentry is not needed. Add a new value to enum