diff options
| -rw-r--r-- | Documentation/hwmon/coretemp | 4 | ||||
| -rw-r--r-- | drivers/hwmon/coretemp.c | 26 |
2 files changed, 26 insertions, 4 deletions
diff --git a/Documentation/hwmon/coretemp b/Documentation/hwmon/coretemp index d3d79e658718..65d1e667c36e 100644 --- a/Documentation/hwmon/coretemp +++ b/Documentation/hwmon/coretemp @@ -4,7 +4,9 @@ Kernel driver coretemp Supported chips: * All Intel Core family Prefix: 'coretemp' - CPUID: family 0x6, models 0xe, 0xf, 0x16, 0x17, 0x1c (Atom) + CPUID: family 0x6, models 0xe (Pentium M DC), 0xf (Core 2 DC 65nm), + 0x16 (Core 2 SC 65nm), 0x17 (Penryn 45nm), + 0x1a (Nehalem), 0x1c (Atom). Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual Volume 3A: System Programming Guide http://softwarecommunity.intel.com/Wiki/Mobility/720.htm diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index 4c15ed7eb786..c86b1247b94c 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -157,6 +157,7 @@ static int __devinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id, struct device * /* The 100C is default for both mobile and non mobile CPUs */ int tjmax = 100000; + int tjmax_ee = 85000; int usemsr_ee = 1; int err; u32 eax, edx; @@ -175,6 +176,7 @@ static int __devinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id, struct device * } if ((c->x86_model > 0xe) && (usemsr_ee)) { + u8 platform_id; /* Now we can detect the mobile CPU using Intel provided table http://softwarecommunity.intel.com/Wiki/Mobility/720.htm @@ -187,8 +189,24 @@ static int __devinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id, struct device * "Unable to access MSR 0x17, assuming desktop" " CPU\n"); usemsr_ee = 0; - } else if (!(eax & 0x10000000)) { + } else if (c->x86_model < 0x17 && !(eax & 0x10000000)) { + /* Trust bit 28 up to Penryn, I could not find any + documentation on that; if you happen to know + someone at Intel please ask */ usemsr_ee = 0; + } else { + /* Platform ID bits 52:50 (EDX starts at bit 32) */ + platform_id = (edx >> 18) & 0x7; + + /* Mobile Penryn CPU seems to be platform ID 7 or 5 + (guesswork) */ + if ((c->x86_model == 0x17) && + ((platform_id == 5) || (platform_id == 7))) { + /* If MSR EE bit is set, set it to 90 degrees C, + otherwise 105 degrees C */ + tjmax_ee = 90000; + tjmax = 105000; + } } } @@ -200,7 +218,7 @@ static int __devinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id, struct device * "Unable to access MSR 0xEE, for Tjmax, left" " at default"); } else if (eax & 0x40000000) { - tjmax = 85000; + tjmax = tjmax_ee; } /* if we dont use msr EE it means we are desktop CPU (with exeception of Atom) */ @@ -422,7 +440,9 @@ static int __init coretemp_init(void) for_each_online_cpu(i) { struct cpuinfo_x86 *c = &cpu_data(i); - /* check if family 6, models 0xe, 0xf, 0x16, 0x17, 0x1A, 0x1c */ + /* check if family 6, models 0xe (Pentium M DC), + 0xf (Core 2 DC 65nm), 0x16 (Core 2 SC 65nm), + 0x17 (Penryn 45nm), 0x1a (Nehalem), 0x1c (Atom) */ if ((c->cpuid_level < 0) || (c->x86 != 0x6) || !((c->x86_model == 0xe) || (c->x86_model == 0xf) || (c->x86_model == 0x16) || (c->x86_model == 0x17) || |