27 lines
712 B
Diff
27 lines
712 B
Diff
Subject: x86-kvm-require-const-tsc-for-rt.patch
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Sun, 06 Nov 2011 12:26:18 +0100
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/3.12/patches-3.12.6-rt9.tar.xz
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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arch/x86/kvm/x86.c | 7 +++++++
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1 file changed, 7 insertions(+)
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--- a/arch/x86/kvm/x86.c
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+++ b/arch/x86/kvm/x86.c
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@@ -5491,6 +5491,13 @@ int kvm_arch_init(void *opaque)
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goto out;
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}
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+#ifdef CONFIG_PREEMPT_RT_FULL
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+ if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
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+ printk(KERN_ERR "RT requires X86_FEATURE_CONSTANT_TSC\n");
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+ return -EOPNOTSUPP;
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+ }
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+#endif
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+
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r = kvm_mmu_module_init();
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if (r)
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goto out_free_percpu;
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