[Xen-changelog] [xen master] x86/cpuidle: correct Cannon Lake residency MSRs

[patchbot@xxxxxxx]

commit 9ff09aefc46385dc04c38b6dd1f1ac25f784f482
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Fri Apr 3 17:15:58 2020 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Apr 3 17:15:58 2020 +0200

    x86/cpuidle: correct Cannon Lake residency MSRs
    
    As per SDM rev 071 Cannon Lake has
    - no CC3 residency MSR at 3FC,
    - a CC1 residency MSR ar 660 (like various Atoms),
    - a useless (always zero) CC3 residency MSR at 662.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/acpi/cpu_idle.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/xen/arch/x86/acpi/cpu_idle.c b/xen/arch/x86/acpi/cpu_idle.c
index 5cd70d7a40..e00f2a82de 100644
--- a/xen/arch/x86/acpi/cpu_idle.c
+++ b/xen/arch/x86/acpi/cpu_idle.c
@@ -69,7 +69,7 @@
 #define GET_PC8_RES(val)  GET_HW_RES_IN_NS(0x630, val) /* some Haswells only */
 #define GET_PC9_RES(val)  GET_HW_RES_IN_NS(0x631, val) /* some Haswells only */
 #define GET_PC10_RES(val) GET_HW_RES_IN_NS(0x632, val) /* some Haswells only */
-#define GET_CC1_RES(val)  GET_HW_RES_IN_NS(0x660, val) /* Silvermont only */
+#define GET_CC1_RES(val)  GET_HW_RES_IN_NS(0x660, val)
 #define GET_CC3_RES(val)  GET_HW_RES_IN_NS(0x3FC, val)
 #define GET_CC6_RES(val)  GET_HW_RES_IN_NS(0x3FD, val)
 #define GET_CC7_RES(val)  GET_HW_RES_IN_NS(0x3FE, val) /* SNB onwards */
@@ -180,8 +180,6 @@ static void do_get_hw_residencies(void *arg)
     case 0x4E:
     case 0x55:
     case 0x5E:
-    /* Cannon Lake */
-    case 0x66:
     /* Kaby Lake */
     case 0x8E:
     case 0x9E:
@@ -203,6 +201,16 @@ static void do_get_hw_residencies(void *arg)
         GET_CC3_RES(hw_res->cc3);
         GET_CC6_RES(hw_res->cc6);
         break;
+    /* Cannon Lake */
+    case 0x66:
+        GET_PC2_RES(hw_res->pc2);
+        GET_PC3_RES(hw_res->pc3);
+        GET_PC6_RES(hw_res->pc6);
+        GET_PC7_RES(hw_res->pc7);
+        GET_CC1_RES(hw_res->cc1);
+        GET_CC6_RES(hw_res->cc6);
+        GET_CC7_RES(hw_res->cc7);
+        break;
     /* Xeon Phi Knights Landing */
     case 0x57:
     /* Xeon Phi Knights Mill */
--
generated by git-patchbot for /home/xen/git/xen.git#master

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