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(parent: be6fcb5) | patch
x86/speculation, KVM: Implement support for VIRT_SPEC_CTRL/LS_CFG
authorThomas Gleixner <tglx@linutronix.de>
Thu, 10 May 2018 18:42:48 +0000 (20:42 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Thu, 17 May 2018 15:09:21 +0000 (17:09 +0200)
commit47c61b3955cf712cadfc25635bf9bc174af030ea
treed25d09aa3b84755bd8296a9e0e6a32c3884cd5actree | snapshot
parentbe6fcb5478e95bb1c91f489121238deb3abca46acommit | diff
x86/speculation, KVM: Implement support for VIRT_SPEC_CTRL/LS_CFG

Add the necessary logic for supporting the emulated VIRT_SPEC_CTRL MSR to
x86_virt_spec_ctrl().  If either X86_FEATURE_LS_CFG_SSBD or
X86_FEATURE_VIRT_SPEC_CTRL is set then use the new guest_virt_spec_ctrl
argument to check whether the state must be modified on the host. The
update reuses speculative_store_bypass_update() so the ZEN-specific sibling
coordination can be reused.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
arch/x86/include/asm/spec-ctrl.h diff | blob | history
arch/x86/kernel/cpu/bugs.c diff | blob | history
Domain: System / Kernel; Licenses: GPL-2.0;