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From: Dylanger Daly <dylanger@thegrail.co>
To: xen-devel@lists.xenproject.org
Cc: Dylanger Daly <dylanger@thegrail.co>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Jan Beulich <jbeulich@suse.com>,
	xen-devel@lists.xen.org
Subject: [PATCH] Add Undervolt MSRs to wrmsr function.
Date: Thu, 18 Apr 2019 09:56:34 +0100	[thread overview]
Message-ID: <20190418085634.3629-1-dylanger@thegrail.co> (raw)

Giving Laptop Users the ability to Undervolt and change Temp Throttle Limits.

Signed-off-by: Dylanger Daly <dylanger@thegrail.co>
---
 xen/arch/x86/traps.c            | 8 ++++++++
 xen/include/asm-x86/msr-index.h | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index 1a22895907..475a2a5720 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -2684,6 +2684,14 @@ static int priv_op_write_msr(unsigned int reg, uint64_t val,
             goto invalid;
         return X86EMUL_OKAY;
 
+    case MSR_IA32_VOLTAGE_OFFSET:
+    case MSR_IA32_TEMP_CONTROL:
+        if ( boot_cpu_data.x86_vendor != X86_VENDOR_INTEL )
+            break;
+        if ( wrmsr_safe(reg, val) == 0 )
+            return X86EMUL_OKAY;
+        break;
+
     case MSR_IA32_MISC_ENABLE:
         if ( rdmsr_safe(reg, temp) )
             break;
diff --git a/xen/include/asm-x86/msr-index.h b/xen/include/asm-x86/msr-index.h
index 7bb382f456..75dad3fe43 100644
--- a/xen/include/asm-x86/msr-index.h
+++ b/xen/include/asm-x86/msr-index.h
@@ -346,6 +346,8 @@
 #define MSR_IA32_THERM_INTERRUPT	0x0000019b
 #define MSR_IA32_THERM_STATUS		0x0000019c
 #define MSR_IA32_MISC_ENABLE		0x000001a0
+#define MSR_IA32_VOLTAGE_OFFSET		0x00000150
+#define MSR_IA32_TEMP_CONTROL		0x000001a2
 #define MSR_IA32_MISC_ENABLE_PERF_AVAIL   (1<<7)
 #define MSR_IA32_MISC_ENABLE_BTS_UNAVAIL  (1<<11)
 #define MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL (1<<12)
-- 
2.20.1


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WARNING: multiple messages have this Message-ID (diff)
From: Dylanger Daly <dylanger@thegrail.co>
To: xen-devel@lists.xenproject.org
Cc: Dylanger Daly <dylanger@thegrail.co>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Jan Beulich <jbeulich@suse.com>,
	xen-devel@lists.xen.org
Subject: [Xen-devel] [PATCH] Add Undervolt MSRs to wrmsr function.
Date: Thu, 18 Apr 2019 09:56:34 +0100	[thread overview]
Message-ID: <20190418085634.3629-1-dylanger@thegrail.co> (raw)
Message-ID: <20190418085634.6K38_qhlHmjQf77CPWrPtxQDAaffi3H92fE0QsxyfHM@z> (raw)

Giving Laptop Users the ability to Undervolt and change Temp Throttle Limits.

Signed-off-by: Dylanger Daly <dylanger@thegrail.co>
---
 xen/arch/x86/traps.c            | 8 ++++++++
 xen/include/asm-x86/msr-index.h | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index 1a22895907..475a2a5720 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -2684,6 +2684,14 @@ static int priv_op_write_msr(unsigned int reg, uint64_t val,
             goto invalid;
         return X86EMUL_OKAY;
 
+    case MSR_IA32_VOLTAGE_OFFSET:
+    case MSR_IA32_TEMP_CONTROL:
+        if ( boot_cpu_data.x86_vendor != X86_VENDOR_INTEL )
+            break;
+        if ( wrmsr_safe(reg, val) == 0 )
+            return X86EMUL_OKAY;
+        break;
+
     case MSR_IA32_MISC_ENABLE:
         if ( rdmsr_safe(reg, temp) )
             break;
diff --git a/xen/include/asm-x86/msr-index.h b/xen/include/asm-x86/msr-index.h
index 7bb382f456..75dad3fe43 100644
--- a/xen/include/asm-x86/msr-index.h
+++ b/xen/include/asm-x86/msr-index.h
@@ -346,6 +346,8 @@
 #define MSR_IA32_THERM_INTERRUPT	0x0000019b
 #define MSR_IA32_THERM_STATUS		0x0000019c
 #define MSR_IA32_MISC_ENABLE		0x000001a0
+#define MSR_IA32_VOLTAGE_OFFSET		0x00000150
+#define MSR_IA32_TEMP_CONTROL		0x000001a2
 #define MSR_IA32_MISC_ENABLE_PERF_AVAIL   (1<<7)
 #define MSR_IA32_MISC_ENABLE_BTS_UNAVAIL  (1<<11)
 #define MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL (1<<12)
-- 
2.20.1


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel

             reply	other threads:[~2019-04-18  8:56 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-18  8:56 Dylanger Daly [this message]
2019-04-18  8:56 ` [Xen-devel] [PATCH] Add Undervolt MSRs to wrmsr function Dylanger Daly
2019-04-18  9:09 ` Andrew Cooper
2019-04-18  9:09   ` [Xen-devel] " Andrew Cooper
2019-04-18  9:19   ` Dylanger Daly
2019-04-18  9:19     ` [Xen-devel] " Dylanger Daly
2019-04-18 11:12     ` Andrew Cooper
2019-04-18 11:12       ` [Xen-devel] " Andrew Cooper
2019-04-18 11:54       ` Dylanger Daly
2019-04-18 11:54         ` [Xen-devel] " Dylanger Daly

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