| commit | b0ef8c72b3d70505ba7fd72af6b1e3fc9b3ae9bc | |
| author | Thomas Gleixner <tglx@linutronix.de> | |
| Thu, 10 May 2018 18:42:48 +0000 (10 20:42 +0200) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Tue, 22 May 2018 14:58:04 +0000 (22 16:58 +0200) | ||
| tree | a23d02c40da88e82533575b905cebe3c49ba408e | treesnapshot (tar.gz zip) |
| parent | 0ec827f974e198c609c2f258a5a1f11f9af48bb2 | commitdiff |
x86/speculation, KVM: Implement support for VIRT_SPEC_CTRL/LS_CFG
commit 47c61b3955cf712cadfc25635bf9bc174af030ea upstream
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>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 47c61b3955cf712cadfc25635bf9bc174af030ea upstream
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>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| arch/x86/include/asm/spec-ctrl.h | diffblobblamehistory | |
| arch/x86/kernel/cpu/bugs.c | diffblobblamehistory |