[CI] <x86/AMD64> Introduce an option to compile LKRG without verifying MSRs on each (v)CPU core. It might be useful for the host machines which manages VMs (root-partition). This compilation option is DISABLED by default.

src/modules/database/arch/x86/MSR.h

@@ -21,13 +21,24 @@
 
 u64 p_read_msr(/*int p_cpu, */u32 p_arg);
 
-#define P_MSR_READ_COUNT(x,y,z)              \
-do {                                         \
-   char p_tmp = x-1;                         \
-   do {                                      \
-      y = p_read_msr(z);                     \
-   } while(!y && p_tmp--);                   \
-} while(0)
+#if defined(P_LKRG_CI_X86_NO_MSR)
+
+ #define P_MSR_READ_COUNT(x,y,z)              \
+ do {                                         \
+       y = -1;                                \
+ } while(0)
+
+#else
+
+ #define P_MSR_READ_COUNT(x,y,z)              \
+ do {                                         \
+    char p_tmp = x-1;                         \
+    do {                                      \
+       y = p_read_msr(z);                     \
+    } while(!y && p_tmp--);                   \
+ } while(0)
+
+#endif
 
 #ifdef CONFIG_X86_64
  #define P_MSR_ASM_RET(val, low, high)     (((u64)(high) << 32) | (low))

src/p_lkrg_main.h

@@ -19,6 +19,7 @@
 #define P_LKRG_MAIN_H
 
 #define P_LKRG_UNHIDE
+//#define P_LKRG_CI_X86_NO_MSR
 //#define P_LKRG_PCFI_NO_STACKWALK
 
 #include <linux/kernel.h>