[coreboot-gerrit] Change in ...coreboot[master]: arch/x86/cpu: Add functions to determine CPU vendor

[Patrick Rudolph (Code Review)]

Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/32130

Change subject: arch/x86/cpu: Add functions to determine CPU vendor
......................................................................

arch/x86/cpu: Add functions to determine CPU vendor

Add two functions to determine if CPU is made by a specific vendor.
Use Kconfig symbols and CPUID to determine the CPU vendor.

Change-Id: I1bd6c3b59cfd992f7ba507bc9f9269669920b24f
Signed-off-by: Patrick Rudolph 
---
M src/arch/x86/cpu.c
M src/arch/x86/include/arch/cpu.h
2 files changed, 34 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/30/32130/1

diff --git a/src/arch/x86/cpu.c b/src/arch/x86/cpu.c
index 80d4d0d..e82df00 100644
--- a/src/arch/x86/cpu.c
+++ b/src/arch/x86/cpu.c
@@ -196,6 +196,36 @@
    }
 }

+bool cpu_is_amd(void)
+{
+	if (CONFIG(CPU_AMD_AGESA) || CONFIG(CPU_AMD_PI))
+		return true;
+	else if (CONFIG(CPU_INTEL_COMMON) || CONFIG(SOC_INTEL_COMMON))
+		return false;
+	else if (cpu_have_cpuid()) {
+		struct device cpu;
+		identify_cpu(&cpu);
+		return cpu.vendor == X86_VENDOR_AMD;
+	}
+
+	return false;
+}
+
+bool cpu_is_intel(void)
+{
+	if (CONFIG(CPU_INTEL_COMMON) || CONFIG(SOC_INTEL_COMMON))
+		return true;
+	else if (CONFIG(CPU_AMD_AGESA) || CONFIG(CPU_AMD_PI))
+		return false;
+	else if (cpu_have_cpuid()) {
+		struct device cpu;
+		identify_cpu(&cpu);
+		return cpu.vendor == X86_VENDOR_INTEL;
+	}
+
+	return false;
+}
+
 struct cpu_driver *find_cpu_driver(struct device *cpu)
 {
    struct cpu_driver *driver;
diff --git a/src/arch/x86/include/arch/cpu.h b/src/arch/x86/include/arch/cpu.h
index b40dd1b..ce4ae11 100644
--- a/src/arch/x86/include/arch/cpu.h
+++ b/src/arch/x86/include/arch/cpu.h
@@ -217,6 +217,10 @@
    ci = cpu_info();
    return ci->index;
 }
+
+bool cpu_is_amd(void);
+bool cpu_is_intel(void);
+
 #endif

#ifndef __ROMCC__ // romcc is segfaulting in some cases