x86/resctrl: Re-arrange the RDT init code

Separate the call sequence for rdt_quirks and MBA feature. This is in
preparation to handle vendor differences in these call sequences. Rename
the functions to make the flow a bit more meaningful.

Signed-off-by: Babu Moger <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Brijesh Singh <[email protected]>
Cc: "Chang S. Bae" <[email protected]>
Cc: David Miller <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: Dmitry Safonov <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Kate Stewart <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Philippe Ombredanne <[email protected]>
Cc: Pu Wen <[email protected]>
Cc: <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Reinette Chatre <[email protected]>
Cc: Rian Hunter <[email protected]>
Cc: Sherry Hurwitz <[email protected]>
Cc: Suravee Suthikulpanit <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Thomas Lendacky <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Vitaly Kuznetsov <[email protected]>
Cc: <[email protected]>
Cc: x86-ml <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

1 files changed, 21 insertions, 7 deletions

diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index 0cf890ae0de2..40380731c588 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -259,7 +259,7 @@ static inline bool rdt_get_mb_table(struct rdt_resource *r)
 	return false;
 }
 
-static bool rdt_get_mem_config(struct rdt_resource *r)
+static bool __get_mem_config(struct rdt_resource *r)
 {
 	union cpuid_0x10_3_eax eax;
 	union cpuid_0x10_x_edx edx;
@@ -794,6 +794,14 @@ static bool __init rdt_cpu_has(int flag)
 	return ret;
 }
 
+static __init bool get_mem_config(void)
+{
+	if (rdt_cpu_has(X86_FEATURE_MBA))
+		return __get_mem_config(&rdt_resources_all[RDT_RESOURCE_MBA]);
+
+	return false;
+}
+
 static __init bool get_rdt_alloc_resources(void)
 {
 	bool ret = false;
@@ -818,10 +826,9 @@ static __init bool get_rdt_alloc_resources(void)
 		ret = true;
 	}
 
-	if (rdt_cpu_has(X86_FEATURE_MBA)) {
-		if (rdt_get_mem_config(&rdt_resources_all[RDT_RESOURCE_MBA]))
-			ret = true;
-	}
+	if (get_mem_config())
+		ret = true;
+
 	return ret;
 }
 
@@ -840,7 +847,7 @@ static __init bool get_rdt_mon_resources(void)
 	return !rdt_get_mon_l3_config(&rdt_resources_all[RDT_RESOURCE_L3]);
 }
 
-static __init void rdt_quirks(void)
+static __init void __check_quirks_intel(void)
 {
 	switch (boot_cpu_data.x86_model) {
 	case INTEL_FAM6_HASWELL_X:
@@ -855,9 +862,14 @@ static __init void rdt_quirks(void)
 	}
 }
 
+static __init void check_quirks(void)
+{
+	if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+		__check_quirks_intel();
+}
+
 static __init bool get_rdt_resources(void)
 {
-	rdt_quirks();
 	rdt_alloc_capable = get_rdt_alloc_resources();
 	rdt_mon_capable = get_rdt_mon_resources();
 
@@ -871,6 +883,8 @@ static int __init resctrl_late_init(void)
 	struct rdt_resource *r;
 	int state, ret;
 
+	check_quirks();
+
 	if (!get_rdt_resources())
 		return -ENODEV;