[XEN PATCH v1 1/2] x86/intel: optional build of intel.c

[Sergiy Kibrik <Sergiy_Kibrik@xxxxxxxx>]

With specific config option INTEL in place and most of the code that depends
on intel.c now can be optionally enabled/disabled it's now possible to put
the whole intel.c under INTEL option as well. This will allow for a Xen build
without Intel CPU support.

Signed-off-by: Sergiy Kibrik <Sergiy_Kibrik@xxxxxxxx>
---
 xen/arch/x86/cpu/Makefile            | 6 +++---
 xen/arch/x86/cpu/common.c            | 4 +++-
 xen/arch/x86/include/asm/processor.h | 7 ++++---
 3 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/xen/arch/x86/cpu/Makefile b/xen/arch/x86/cpu/Makefile
index eafce5f204..020c86bda3 100644
--- a/xen/arch/x86/cpu/Makefile
+++ b/xen/arch/x86/cpu/Makefile
@@ -6,10 +6,10 @@ obj-y += amd.o
 obj-y += centaur.o
 obj-y += common.o
 obj-y += hygon.o
-obj-y += intel.o
-obj-y += intel_cacheinfo.o
+obj-$(CONFIG_INTEL) += intel.o
+obj-$(CONFIG_INTEL) += intel_cacheinfo.o
 obj-y += mwait-idle.o
-obj-y += shanghai.o
+obj-$(CONFIG_INTEL) += shanghai.o
 obj-y += vpmu.o
 obj-$(CONFIG_AMD) += vpmu_amd.o
 obj-$(CONFIG_INTEL) += vpmu_intel.o
diff --git a/xen/arch/x86/cpu/common.c b/xen/arch/x86/cpu/common.c
index ff4cd22897..50ce13f81c 100644
--- a/xen/arch/x86/cpu/common.c
+++ b/xen/arch/x86/cpu/common.c
@@ -336,11 +336,13 @@ void __init early_cpu_init(bool verbose)
 
        c->x86_vendor = x86_cpuid_lookup_vendor(ebx, ecx, edx);
        switch (c->x86_vendor) {
+#ifdef CONFIG_INTEL
        case X86_VENDOR_INTEL:    intel_unlock_cpuid_leaves(c);
                                  actual_cpu = intel_cpu_dev;    break;
+       case X86_VENDOR_SHANGHAI: actual_cpu = shanghai_cpu_dev; break;
+#endif
        case X86_VENDOR_AMD:      actual_cpu = amd_cpu_dev;      break;
        case X86_VENDOR_CENTAUR:  actual_cpu = centaur_cpu_dev;  break;
-       case X86_VENDOR_SHANGHAI: actual_cpu = shanghai_cpu_dev; break;
        case X86_VENDOR_HYGON:    actual_cpu = hygon_cpu_dev;    break;
        default:
                actual_cpu = default_cpu;
diff --git a/xen/arch/x86/include/asm/processor.h 
b/xen/arch/x86/include/asm/processor.h
index 66463f6a6d..a88d45252b 100644
--- a/xen/arch/x86/include/asm/processor.h
+++ b/xen/arch/x86/include/asm/processor.h
@@ -507,15 +507,16 @@ static inline uint8_t get_cpu_family(uint32_t raw, 
uint8_t *model,
 extern int8_t opt_tsx;
 extern bool rtm_disabled;
 void tsx_init(void);
+void update_mcu_opt_ctrl(void);
+void set_in_mcu_opt_ctrl(uint32_t mask, uint32_t val);
 #else
 #define opt_tsx      0     /* explicitly indicate TSX is off */
 #define rtm_disabled false /* RTM was not force-disabled */
 static inline void tsx_init(void) {}
+static inline void update_mcu_opt_ctrl(void) {}
+static inline void set_in_mcu_opt_ctrl(uint32_t mask, uint32_t val) {}
 #endif
 
-void update_mcu_opt_ctrl(void);
-void set_in_mcu_opt_ctrl(uint32_t mask, uint32_t val);
-
 enum ap_boot_method {
     AP_BOOT_NORMAL,
     AP_BOOT_SKINIT,
-- 
2.25.1