aboutsummaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/cpu/vmware.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-18 17:05:47 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-18 17:05:47 -0400
commit78f28b7c555359c67c2a0d23f7436e915329421e (patch)
tree7f8197f82f83c0c19fd9bc85b5d10b5a755d0656 /arch/x86/kernel/cpu/vmware.c
parent3240a77b515f4a15e24d8a3a2135bc87b02cf1d6 (diff)
parent7bd867dfb4e0357e06a3211ab2bd0e714110def3 (diff)
Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (38 commits) x86: Move get/set_wallclock to x86_platform_ops x86: platform: Fix section annotations x86: apic namespace cleanup x86: Distangle ioapic and i8259 x86: Add Moorestown early detection x86: Add hardware_subarch ID for Moorestown x86: Add early platform detection x86: Move tsc_init to late_time_init x86: Move tsc_calibration to x86_init_ops x86: Replace the now identical time_32/64.c by time.c x86: time_32/64.c unify profile_pc x86: Move calibrate_cpu to tsc.c x86: Make timer setup and global variables the same in time_32/64.c x86: Remove mca bus ifdef from timer interrupt x86: Simplify timer_ack magic in time_32.c x86: Prepare unification of time_32/64.c x86: Remove do_timer hook x86: Add timer_init to x86_init_ops x86: Move percpu clockevents setup to x86_init_ops x86: Move xen_post_allocator_init into xen_pagetable_setup_done ... Fix up conflicts in arch/x86/include/asm/io_apic.h
Diffstat (limited to 'arch/x86/kernel/cpu/vmware.c')
-rw-r--r--arch/x86/kernel/cpu/vmware.c21
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 @@
24#include <linux/dmi.h> 24#include <linux/dmi.h>
25#include <asm/div64.h> 25#include <asm/div64.h>
26#include <asm/vmware.h> 26#include <asm/vmware.h>
27#include <asm/x86_init.h>
27 28
28#define CPUID_VMWARE_INFO_LEAF 0x40000000 29#define CPUID_VMWARE_INFO_LEAF 0x40000000
29#define VMWARE_HYPERVISOR_MAGIC 0x564D5868 30#define VMWARE_HYPERVISOR_MAGIC 0x564D5868
@@ -47,21 +48,29 @@ static inline int __vmware_platform(void)
47 return eax != (uint32_t)-1 && ebx == VMWARE_HYPERVISOR_MAGIC; 48 return eax != (uint32_t)-1 && ebx == VMWARE_HYPERVISOR_MAGIC;
48} 49}
49 50
50static unsigned long __vmware_get_tsc_khz(void) 51static unsigned long vmware_get_tsc_khz(void)
51{ 52{
52 uint64_t tsc_hz; 53 uint64_t tsc_hz;
53 uint32_t eax, ebx, ecx, edx; 54 uint32_t eax, ebx, ecx, edx;
54 55
55 VMWARE_PORT(GETHZ, eax, ebx, ecx, edx); 56 VMWARE_PORT(GETHZ, eax, ebx, ecx, edx);
56 57
57 if (ebx == UINT_MAX)
58 return 0;
59 tsc_hz = eax | (((uint64_t)ebx) << 32); 58 tsc_hz = eax | (((uint64_t)ebx) << 32);
60 do_div(tsc_hz, 1000); 59 do_div(tsc_hz, 1000);
61 BUG_ON(tsc_hz >> 32); 60 BUG_ON(tsc_hz >> 32);
62 return tsc_hz; 61 return tsc_hz;
63} 62}
64 63
64void __init vmware_platform_setup(void)
65{
66 uint32_t eax, ebx, ecx, edx;
67
68 VMWARE_PORT(GETHZ, eax, ebx, ecx, edx);
69
70 if (ebx != UINT_MAX)
71 x86_platform.calibrate_tsc = vmware_get_tsc_khz;
72}
73
65/* 74/*
66 * While checking the dmi string infomation, just checking the product 75 * While checking the dmi string infomation, just checking the product
67 * serial key should be enough, as this will always have a VMware 76 * serial key should be enough, as this will always have a VMware
@@ -87,12 +96,6 @@ int vmware_platform(void)
87 return 0; 96 return 0;
88} 97}
89 98
90unsigned long vmware_get_tsc_khz(void)
91{
92 BUG_ON(!vmware_platform());
93 return __vmware_get_tsc_khz();
94}
95
96/* 99/*
97 * VMware hypervisor takes care of exporting a reliable TSC to the guest. 100 * VMware hypervisor takes care of exporting a reliable TSC to the guest.
98 * Still, due to timing difference when running on virtual cpus, the TSC can 101 * Still, due to timing difference when running on virtual cpus, the TSC can