From 0e217001fa81d51ab2745011c7adc65b767a14b9 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Sun, 6 Nov 2011 12:26:18 +0100 Subject: x86-kvm-require-const-tsc-for-rt.patch Signed-off-by: Thomas Gleixner Signed-off-by: Anders Roxell --- arch/x86/kvm/x86.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch/x86/kvm/x86.c') diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index a38dd816015b..13c8f5f144ef 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -5772,6 +5772,13 @@ int kvm_arch_init(void *opaque) goto out; } +#ifdef CONFIG_PREEMPT_RT_FULL + if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { + printk(KERN_ERR "RT requires X86_FEATURE_CONSTANT_TSC\n"); + return -EOPNOTSUPP; + } +#endif + r = kvm_mmu_module_init(); if (r) goto out_free_percpu; -- cgit v1.2.3