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| author | Paolo Bonzini <pbonzini@redhat.com> | 2018-08-05 16:07:46 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-08-05 17:10:19 +0200 |
| commit | 8e0b2b916662e09dd4d09e5271cdf214c6b80e62 (patch) | |
| tree | 77e5da72764da3c8ead7c72391a369f48adfb606 /arch/x86/kernel/cpu/bugs.c | |
| parent | x86/speculation: Simplify sysfs report of VMX L1TF vulnerability (diff) | |
| download | linux-8e0b2b916662e09dd4d09e5271cdf214c6b80e62.tar.xz linux-8e0b2b916662e09dd4d09e5271cdf214c6b80e62.zip | |
x86/speculation: Use ARCH_CAPABILITIES to skip L1D flush on vmentry
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>
Diffstat (limited to 'arch/x86/kernel/cpu/bugs.c')
| -rw-r--r-- | arch/x86/kernel/cpu/bugs.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index b0886bd24164..86f4549b7c9f 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -755,6 +755,7 @@ static const char *l1tf_vmx_states[] = { [VMENTER_L1D_FLUSH_COND] = "conditional cache flushes", [VMENTER_L1D_FLUSH_ALWAYS] = "cache flushes", [VMENTER_L1D_FLUSH_EPT_DISABLED] = "EPT disabled", + [VMENTER_L1D_FLUSH_NOT_REQUIRED] = "flush not necessary" }; static ssize_t l1tf_show_state(char *buf) |