diff options
Diffstat (limited to 'arch/x86/kernel/setup.c')
| -rw-r--r-- | arch/x86/kernel/setup.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 6f80b85..d8f1712 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -136,4 +136,17 @@ void __init setup_per_cpu_areas(void) setup_cpumask_of_cpu(); } +#define ENABLE_CF8_EXT_CFG (1ULL << 46) + +void __cpuinit amd_enable_pci_ext_cfg(struct cpuinfo_x86 *c) +{ + u64 reg; + rdmsrl(MSR_AMD64_NB_CFG, reg); + if (!(reg & ENABLE_CF8_EXT_CFG)) { + reg |= ENABLE_CF8_EXT_CFG; + wrmsrl(MSR_AMD64_NB_CFG, reg); + } + set_cpu_cap(c, X86_FEATURE_PCI_EXT_CFG); +} + #endif |