diff options
| author | Nicolai Stange <nstange@suse.de> | 2018-07-21 23:25:00 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-15 19:11:06 +0300 |
| commit | 569f08c9b0d0e5761e9a542e8da0fa0d2ca9d25d (patch) | |
| tree | f8a6c07e3dc1cebffd35ab1d24130bacd82c8d3c /arch | |
| parent | afb059e688f22d860575cddea281534504397756 (diff) | |
| download | linux-569f08c9b0d0e5761e9a542e8da0fa0d2ca9d25d.tar.xz | |
x86/KVM/VMX: Replace 'vmx_l1d_flush_always' with 'vmx_l1d_flush_cond'
commit 427362a142441f08051369db6fbe7f61c73b3dca upstream
The vmx_l1d_flush_always static key is only ever evaluated if
vmx_l1d_should_flush is enabled. In that case however, there are only two
L1d flushing modes possible: "always" and "conditional".
The "conditional" mode's implementation tends to require more sophisticated
logic than the "always" mode.
Avoid inverted logic by replacing the 'vmx_l1d_flush_always' static key
with a 'vmx_l1d_flush_cond' one.
There is no change in functionality.
Signed-off-by: Nicolai Stange <nstange@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 60f860b0bb45..e07331e06b7c 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -189,7 +189,7 @@ module_param(ple_window_max, uint, 0444); extern const ulong vmx_return; static DEFINE_STATIC_KEY_FALSE(vmx_l1d_should_flush); -static DEFINE_STATIC_KEY_FALSE(vmx_l1d_flush_always); +static DEFINE_STATIC_KEY_FALSE(vmx_l1d_flush_cond); static DEFINE_MUTEX(vmx_l1d_flush_mutex); /* Storage for pre module init parameter parsing */ @@ -263,10 +263,10 @@ static int vmx_setup_l1d_flush(enum vmx_l1d_flush_state l1tf) else static_branch_disable(&vmx_l1d_should_flush); - if (l1tf == VMENTER_L1D_FLUSH_ALWAYS) - static_branch_enable(&vmx_l1d_flush_always); + if (l1tf == VMENTER_L1D_FLUSH_COND) + static_branch_enable(&vmx_l1d_flush_cond); else - static_branch_disable(&vmx_l1d_flush_always); + static_branch_disable(&vmx_l1d_flush_cond); return 0; } @@ -9462,7 +9462,7 @@ static void vmx_l1d_flush(struct kvm_vcpu *vcpu) * This code is only executed when the the flush mode is 'cond' or * 'always' */ - if (!static_branch_unlikely(&vmx_l1d_flush_always)) { + if (static_branch_likely(&vmx_l1d_flush_cond)) { /* * Clear the flush bit, it gets set again either from * vcpu_run() or from one of the unsafe VMEXIT |