diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2009-08-20 17:06:25 +0200 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2009-08-31 09:35:47 +0200 |
commit | 2d826404f0bdcac2a4dd7e3c446b70d6a3b63b78 (patch) | |
tree | 7db2dc0fbde3a25a89f1fc1514152567f612ccde /arch/x86/kernel/cpu/vmware.c | |
parent | 47926214d8b2bef13b2be57c500194a804f16198 (diff) | |
download | linux-2d826404f0bdcac2a4dd7e3c446b70d6a3b63b78.tar.bz2 |
x86: Move tsc_calibration to x86_init_ops
TSC calibration is modified by the vmware hypervisor and paravirt by
separate means. Moorestown wants to add its own calibration routine as
well. So make calibrate_tsc a proper x86_init_ops function and
override it by paravirt or by the early setup of the vmware
hypervisor.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/cpu/vmware.c')
-rw-r--r-- | arch/x86/kernel/cpu/vmware.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index bc24f514ec93..0a46b4df5d80 100644 --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -24,6 +24,7 @@ #include <linux/dmi.h> #include <asm/div64.h> #include <asm/vmware.h> +#include <asm/x86_init.h> #define CPUID_VMWARE_INFO_LEAF 0x40000000 #define VMWARE_HYPERVISOR_MAGIC 0x564D5868 @@ -47,21 +48,29 @@ static inline int __vmware_platform(void) return eax != (uint32_t)-1 && ebx == VMWARE_HYPERVISOR_MAGIC; } -static unsigned long __vmware_get_tsc_khz(void) +static unsigned long vmware_get_tsc_khz(void) { uint64_t tsc_hz; uint32_t eax, ebx, ecx, edx; VMWARE_PORT(GETHZ, eax, ebx, ecx, edx); - if (ebx == UINT_MAX) - return 0; tsc_hz = eax | (((uint64_t)ebx) << 32); do_div(tsc_hz, 1000); BUG_ON(tsc_hz >> 32); return tsc_hz; } +void __init vmware_platform_setup(void) +{ + uint32_t eax, ebx, ecx, edx; + + VMWARE_PORT(GETHZ, eax, ebx, ecx, edx); + + if (ebx != UINT_MAX) + x86_platform.calibrate_tsc = vmware_get_tsc_khz; +} + /* * While checking the dmi string infomation, just checking the product * serial key should be enough, as this will always have a VMware @@ -87,12 +96,6 @@ int vmware_platform(void) return 0; } -unsigned long vmware_get_tsc_khz(void) -{ - BUG_ON(!vmware_platform()); - return __vmware_get_tsc_khz(); -} - /* * VMware hypervisor takes care of exporting a reliable TSC to the guest. * Still, due to timing difference when running on virtual cpus, the TSC can |