[PATCH v4 23/34] x86/cacheinfo: Pass a 'struct cpuinfo_x86' refrence to CPUID(0x4) code

Prepare the CPUID(0x4) cache topology code for using parsed CPUID APIs
instead of invoking direct CPUID queries.

Since such an API requires a 'struct cpuinfo_x86' reference, trickle it
from the <linux/cacheinfo.h>'s populate_cache_leaves() x86 implementation
down to fill_cpuid4_info() and its Intel-specific CPUID(0x4) code.

No functional change intended.

Suggested-by: Ingo Molnar <[email protected]>
Signed-off-by: Ahmed S. Darwish <[email protected]>
Link: https://lore.kernel.org/lkml/[email protected]
---
 arch/x86/kernel/cpu/cacheinfo.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/cpu/cacheinfo.c b/arch/x86/kernel/cpu/cacheinfo.c
index f837ccdec116..0ed5dd6d29ef 100644
--- a/arch/x86/kernel/cpu/cacheinfo.c
+++ b/arch/x86/kernel/cpu/cacheinfo.c
@@ -252,7 +252,7 @@ static int amd_fill_cpuid4_info(int index, struct _cpuid4_info *id4)
 	return cpuid4_info_fill_done(id4, eax, ebx, ecx);
 }
 
-static int intel_fill_cpuid4_info(int index, struct _cpuid4_info *id4)
+static int intel_fill_cpuid4_info(struct cpuinfo_x86 *unused, int index, struct _cpuid4_info *id4)
 {
 	union _cpuid4_leaf_eax eax;
 	union _cpuid4_leaf_ebx ebx;
@@ -264,13 +264,13 @@ static int intel_fill_cpuid4_info(int index, struct _cpuid4_info *id4)
 	return cpuid4_info_fill_done(id4, eax, ebx, ecx);
 }
 
-static int fill_cpuid4_info(int index, struct _cpuid4_info *id4)
+static int fill_cpuid4_info(struct cpuinfo_x86 *c, int index, struct _cpuid4_info *id4)
 {
 	u8 cpu_vendor = boot_cpu_data.x86_vendor;
 
 	return (cpu_vendor == X86_VENDOR_AMD || cpu_vendor == X86_VENDOR_HYGON) ?
 		amd_fill_cpuid4_info(index, id4) :
-		intel_fill_cpuid4_info(index, id4);
+		intel_fill_cpuid4_info(c, index, id4);
 }
 
 static int find_num_cache_leaves(struct cpuinfo_x86 *c)
@@ -434,7 +434,7 @@ static bool intel_cacheinfo_0x4(struct cpuinfo_x86 *c)
 		struct _cpuid4_info id4 = {};
 		int ret;
 
-		ret = intel_fill_cpuid4_info(i, &id4);
+		ret = intel_fill_cpuid4_info(c, i, &id4);
 		if (ret < 0)
 			continue;
 
@@ -618,13 +618,14 @@ int populate_cache_leaves(unsigned int cpu)
 {
 	struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
 	struct cacheinfo *ci = this_cpu_ci->info_list;
+	struct cpuinfo_x86 *c = &cpu_data(cpu);
 	u8 cpu_vendor = boot_cpu_data.x86_vendor;
 	struct amd_northbridge *nb = NULL;
 	struct _cpuid4_info id4 = {};
 	int idx, ret;
 
 	for (idx = 0; idx < this_cpu_ci->num_leaves; idx++) {
-		ret = fill_cpuid4_info(idx, &id4);
+		ret = fill_cpuid4_info(c, idx, &id4);
 		if (ret)
 			return ret;
 
-- 
2.50.1