change wifi driver to cypress

hc

2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390

 kernel/arch/x86/kernel/cpu/microcode/intel.c
..
..
@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Intel CPU Microcode Update Driver for Linux
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  *
..
..
@@ -8,11 +9,6 @@
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  *
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  * Copyright (C) 2012 Fenghua Yu <fenghua.yu@intel.com>
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  *		      H Peter Anvin" <hpa@zytor.com>
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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  */
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13
 
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 /*
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..
@@ -31,6 +27,7 @@
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 #include <linux/kernel.h>
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 #include <linux/slab.h>
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 #include <linux/cpu.h>
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+#include <linux/uio.h>
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 #include <linux/mm.h>
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32
 
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 #include <asm/microcode_intel.h>
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@@ -662,7 +659,6 @@
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 	else
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 		iup = &intel_ucode_patch;
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-reget:
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 	if (!*iup) {
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 		patch = __load_ucode_intel(&uci);
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 		if (!patch)
..
..
@@ -673,12 +669,7 @@
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669
 
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 	uci.mc = *iup;
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671
 
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-	if (apply_microcode_early(&uci, true)) {
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-		/* Mixed-silicon system? Try to refetch the proper patch: */
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-		*iup = NULL;
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-
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-		goto reget;
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-	}
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+	apply_microcode_early(&uci, true);
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673
 }
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674
 
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 static struct microcode_intel *find_patch(struct ucode_cpu_info *uci)
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@@ -751,6 +742,7 @@
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 {
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 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
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 	struct cpuinfo_x86 *c = &cpu_data(cpu);
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+	bool bsp = c->cpu_index == boot_cpu_data.cpu_index;
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 	struct microcode_intel *mc;
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747
 	enum ucode_state ret;
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 	static int prev_rev;
..
..
@@ -796,7 +788,7 @@
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 		return UCODE_ERROR;
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 	}
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799
-	if (rev != prev_rev) {
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+	if (bsp && rev != prev_rev) {
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 		pr_info("updated to revision 0x%x, date = %04x-%02x-%02x\n",
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 			rev,
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 			mc->hdr.date & 0xffff,
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@@ -812,38 +804,39 @@
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 	c->microcode	 = rev;
813
805
 
814
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 	/* Update boot_cpu_data's revision too, if we're on the BSP: */
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-	if (c->cpu_index == boot_cpu_data.cpu_index)
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+	if (bsp)
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 		boot_cpu_data.microcode = rev;
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809
 
818
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 	return ret;
819
811
 }
820
812
 
821
-static enum ucode_state generic_load_microcode(int cpu, void *data, size_t size,
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-				int (*get_ucode_data)(void *, const void *, size_t))
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+static enum ucode_state generic_load_microcode(int cpu, struct iov_iter *iter)
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 {
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 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
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-	u8 *ucode_ptr = data, *new_mc = NULL, *mc = NULL;
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-	int new_rev = uci->cpu_sig.rev;
827
-	unsigned int leftover = size;
828
816
 	unsigned int curr_mc_size = 0, new_mc_size = 0;
829
-	unsigned int csig, cpf;
830
817
 	enum ucode_state ret = UCODE_OK;
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+	int new_rev = uci->cpu_sig.rev;
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+	u8 *new_mc = NULL, *mc = NULL;
820
+	unsigned int csig, cpf;
831
821
 
832
-	while (leftover) {
822
+	while (iov_iter_count(iter)) {
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823
 		struct microcode_header_intel mc_header;
834
-		unsigned int mc_size;
824
+		unsigned int mc_size, data_size;
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+		u8 *data;
835
826
 
836
-		if (leftover < sizeof(mc_header)) {
837
-			pr_err("error! Truncated header in microcode data file\n");
827
+		if (!copy_from_iter_full(&mc_header, sizeof(mc_header), iter)) {
828
+			pr_err("error! Truncated or inaccessible header in microcode data file\n");
838
829
 			break;
839
830
 		}
840
831
 
841
-		if (get_ucode_data(&mc_header, ucode_ptr, sizeof(mc_header)))
842
-			break;
843
-
844
832
 		mc_size = get_totalsize(&mc_header);
845
-		if (!mc_size || mc_size > leftover) {
846
-			pr_err("error! Bad data in microcode data file\n");
833
+		if (mc_size < sizeof(mc_header)) {
834
+			pr_err("error! Bad data in microcode data file (totalsize too small)\n");
835
+			break;
836
+		}
837
+		data_size = mc_size - sizeof(mc_header);
838
+		if (data_size > iov_iter_count(iter)) {
839
+			pr_err("error! Bad data in microcode data file (truncated file?)\n");
847
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 			break;
848
841
 		}
849
842
 
..
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@@ -856,7 +849,9 @@
856
849
 			curr_mc_size = mc_size;
857
850
 		}
858
851
 
859
-		if (get_ucode_data(mc, ucode_ptr, mc_size) ||
852
+		memcpy(mc, &mc_header, sizeof(mc_header));
853
+		data = mc + sizeof(mc_header);
854
+		if (!copy_from_iter_full(data, data_size, iter) ||
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855
 		    microcode_sanity_check(mc, 1) < 0) {
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856
 			break;
862
857
 		}
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@@ -871,14 +866,11 @@
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 			mc = NULL;	/* trigger new vmalloc */
872
867
 			ret = UCODE_NEW;
873
868
 		}
874
-
875
-		ucode_ptr += mc_size;
876
-		leftover  -= mc_size;
877
869
 	}
878
870
 
879
871
 	vfree(mc);
880
872
 
881
-	if (leftover) {
873
+	if (iov_iter_count(iter)) {
882
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 		vfree(new_mc);
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 		return UCODE_ERROR;
884
876
 	}
..
..
@@ -900,12 +892,6 @@
900
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 		 cpu, new_rev, uci->cpu_sig.rev);
901
893
 
902
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 	return ret;
903
-}
904
-
905
-static int get_ucode_fw(void *to, const void *from, size_t n)
906
-{
907
-	memcpy(to, from, n);
908
-	return 0;
909
895
 }
910
896
 
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 static bool is_blacklisted(unsigned int cpu)
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@@ -934,10 +920,12 @@
934
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 static enum ucode_state request_microcode_fw(int cpu, struct device *device,
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921
 					     bool refresh_fw)
936
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 {
937
-	char name[30];
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 	struct cpuinfo_x86 *c = &cpu_data(cpu);
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 	const struct firmware *firmware;
925
+	struct iov_iter iter;
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 	enum ucode_state ret;
927
+	struct kvec kvec;
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+	char name[30];
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929
 
942
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 	if (is_blacklisted(cpu))
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 		return UCODE_NFOUND;
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..
@@ -950,26 +938,30 @@
950
938
 		return UCODE_NFOUND;
951
939
 	}
952
940
 
953
-	ret = generic_load_microcode(cpu, (void *)firmware->data,
954
-				     firmware->size, &get_ucode_fw);
941
+	kvec.iov_base = (void *)firmware->data;
942
+	kvec.iov_len = firmware->size;
943
+	iov_iter_kvec(&iter, WRITE, &kvec, 1, firmware->size);
944
+	ret = generic_load_microcode(cpu, &iter);
955
945
 
956
946
 	release_firmware(firmware);
957
947
 
958
948
 	return ret;
959
949
 }
960
950
 
961
-static int get_ucode_user(void *to, const void *from, size_t n)
962
-{
963
-	return copy_from_user(to, from, n);
964
-}
965
-
966
951
 static enum ucode_state
967
952
 request_microcode_user(int cpu, const void __user *buf, size_t size)
968
953
 {
954
+	struct iov_iter iter;
955
+	struct iovec iov;
956
+
969
957
 	if (is_blacklisted(cpu))
970
958
 		return UCODE_NFOUND;
971
959
 
972
-	return generic_load_microcode(cpu, (void *)buf, size, &get_ucode_user);
960
+	iov.iov_base = (void __user *)buf;
961
+	iov.iov_len = size;
962
+	iov_iter_init(&iter, WRITE, &iov, 1, size);
963
+
964
+	return generic_load_microcode(cpu, &iter);
973
965
 }
974
966
 
975
967
 static struct microcode_ops microcode_intel_ops = {