tree 6ecfa95a75846a6a2992271a9446619d1adcbe66
parent 3ba71a6ffc5a6353a7d87b0166e53bcd38b4fe29
author Paolo Bonzini <pbonzini@redhat.com> 1533478066 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1534347453 +0200

x86/speculation: Use ARCH_CAPABILITIES to skip L1D flush on vmentry

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 vmx_l1d_flush_state, which is used
either if there is no L1TF bug at all, or if bit 3 is set in ARCH_CAPABILITIES.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>