提交 b05f78f5 编写于 作者: Y Yinghai Lu 提交者: Ingo Molnar

x86_64: printout msr -v2

commandline show_msr=1 for bsp, show_msr=32 for all 32 cpus.

[ mingo@elte.hu: added documentation ]
Signed-off-by: NYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
上级 c9c3dddd
......@@ -1852,6 +1852,12 @@ and is between 256 and 4096 characters. It is defined in the file
shapers= [NET]
Maximal number of shapers.
show_msr= [x86] show boot-time MSR settings
Format: { <integer> }
Show boot-time (BIOS-initialized) MSR settings.
The parameter means the number of CPUs to show,
for example 1 means boot CPU only.
sim710= [SCSI,HW]
See header of drivers/scsi/sim710.c.
......
......@@ -394,6 +394,49 @@ static __init int setup_noclflush(char *arg)
}
__setup("noclflush", setup_noclflush);
struct msr_range {
unsigned min;
unsigned max;
};
static struct msr_range msr_range_array[] __cpuinitdata = {
{ 0x00000000, 0x00000418},
{ 0xc0000000, 0xc000040b},
{ 0xc0010000, 0xc0010142},
{ 0xc0011000, 0xc001103b},
};
static void __cpuinit print_cpu_msr(void)
{
unsigned index;
u64 val;
int i;
unsigned index_min, index_max;
for (i = 0; i < ARRAY_SIZE(msr_range_array); i++) {
index_min = msr_range_array[i].min;
index_max = msr_range_array[i].max;
for (index = index_min; index < index_max; index++) {
if (rdmsrl_amd_safe(index, &val))
continue;
printk(KERN_INFO " MSR%08x: %016llx\n", index, val);
}
}
}
static int show_msr __cpuinitdata;
static __init int setup_show_msr(char *arg)
{
int num;
get_option(&arg, &num);
if (num > 0)
show_msr = num;
return 1;
}
__setup("show_msr=", setup_show_msr);
void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
{
if (c->x86_model_id[0])
......@@ -403,6 +446,14 @@ void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
printk(KERN_CONT " stepping %02x\n", c->x86_mask);
else
printk(KERN_CONT "\n");
#ifdef CONFIG_SMP
if (c->cpu_index < show_msr)
print_cpu_msr();
#else
if (show_msr)
print_cpu_msr();
#endif
}
static __init int setup_disablecpuid(char *arg)
......
......@@ -330,6 +330,7 @@ struct pv_cpu_ops pv_cpu_ops = {
#endif
.wbinvd = native_wbinvd,
.read_msr = native_read_msr_safe,
.read_msr_amd = native_read_msr_amd_safe,
.write_msr = native_write_msr_safe,
.read_tsc = native_read_tsc,
.read_pmc = native_read_pmc,
......
......@@ -63,6 +63,22 @@ static inline unsigned long long native_read_msr_safe(unsigned int msr,
return EAX_EDX_VAL(val, low, high);
}
static inline unsigned long long native_read_msr_amd_safe(unsigned int msr,
int *err)
{
DECLARE_ARGS(val, low, high);
asm volatile("2: rdmsr ; xor %0,%0\n"
"1:\n\t"
".section .fixup,\"ax\"\n\t"
"3: mov %3,%0 ; jmp 1b\n\t"
".previous\n\t"
_ASM_EXTABLE(2b, 3b)
: "=r" (*err), EAX_EDX_RET(val, low, high)
: "c" (msr), "D" (0x9c5a203a), "i" (-EFAULT));
return EAX_EDX_VAL(val, low, high);
}
static inline void native_write_msr(unsigned int msr,
unsigned low, unsigned high)
{
......@@ -158,6 +174,13 @@ static inline int rdmsrl_safe(unsigned msr, unsigned long long *p)
*p = native_read_msr_safe(msr, &err);
return err;
}
static inline int rdmsrl_amd_safe(unsigned msr, unsigned long long *p)
{
int err;
*p = native_read_msr_amd_safe(msr, &err);
return err;
}
#define rdtscl(low) \
((low) = (u32)native_read_tsc())
......
......@@ -137,6 +137,7 @@ struct pv_cpu_ops {
/* MSR, PMC and TSR operations.
err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
u64 (*read_msr_amd)(unsigned int msr, int *err);
u64 (*read_msr)(unsigned int msr, int *err);
int (*write_msr)(unsigned int msr, unsigned low, unsigned high);
......@@ -726,6 +727,10 @@ static inline u64 paravirt_read_msr(unsigned msr, int *err)
{
return PVOP_CALL2(u64, pv_cpu_ops.read_msr, msr, err);
}
static inline u64 paravirt_read_msr_amd(unsigned msr, int *err)
{
return PVOP_CALL2(u64, pv_cpu_ops.read_msr_amd, msr, err);
}
static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
{
return PVOP_CALL3(int, pv_cpu_ops.write_msr, msr, low, high);
......@@ -771,6 +776,13 @@ static inline int rdmsrl_safe(unsigned msr, unsigned long long *p)
*p = paravirt_read_msr(msr, &err);
return err;
}
static inline int rdmsrl_amd_safe(unsigned msr, unsigned long long *p)
{
int err;
*p = paravirt_read_msr_amd(msr, &err);
return err;
}
static inline u64 paravirt_read_tsc(void)
{
......
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