Merge remote-tracking branch 'stable/linux-6.6.y' into rpi-6.6.y

Author: popcornmix

Makefile

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 6
 PATCHLEVEL = 6
-SUBLEVEL = 70
+SUBLEVEL = 72
 EXTRAVERSION =
 NAME = Pinguïn Aangedreven
 

arch/arm/boot/dts/nxp/imx/imxrt1050.dtsi

@@ -87,7 +87,7 @@
 			reg = <0x402c0000 0x4000>;
 			interrupts = <110>;
 			clocks = <&clks IMXRT1050_CLK_IPG_PDOF>,
-				<&clks IMXRT1050_CLK_OSC>,
+				<&clks IMXRT1050_CLK_AHB_PODF>,
 				<&clks IMXRT1050_CLK_USDHC1>;
 			clock-names = "ipg", "ahb", "per";
 			bus-width = <4>;

arch/arm64/boot/dts/rockchip/rk3328.dtsi

@@ -304,6 +304,7 @@
 
 			power-domain@RK3328_PD_HEVC {
 				reg = <RK3328_PD_HEVC>;
+				clocks = <&cru SCLK_VENC_CORE>;
 				#power-domain-cells = <0>;
 			};
 			power-domain@RK3328_PD_VIDEO {

arch/riscv/include/asm/cacheflush.h

@@ -13,6 +13,12 @@ static inline void local_flush_icache_all(void)
 	asm volatile ("fence.i" ::: "memory");
 }
 
+static inline void local_flush_icache_range(unsigned long start,
+					    unsigned long end)
+{
+	local_flush_icache_all();
+}
+
 #define PG_dcache_clean PG_arch_1
 
 static inline void flush_dcache_folio(struct folio *folio)

arch/riscv/include/asm/page.h

@@ -122,6 +122,7 @@ struct kernel_mapping {
 
 extern struct kernel_mapping kernel_map;
 extern phys_addr_t phys_ram_base;
+extern unsigned long vmemmap_start_pfn;
 
 #define is_kernel_mapping(x)	\
 	((x) >= kernel_map.virt_addr && (x) < (kernel_map.virt_addr + kernel_map.size))

arch/riscv/include/asm/patch.h

@@ -6,6 +6,7 @@
 #ifndef _ASM_RISCV_PATCH_H
 #define _ASM_RISCV_PATCH_H
 
+int patch_insn_write(void *addr, const void *insn, size_t len);
 int patch_text_nosync(void *addr, const void *insns, size_t len);
 int patch_text_set_nosync(void *addr, u8 c, size_t len);
 int patch_text(void *addr, u32 *insns, int ninsns);

arch/riscv/include/asm/pgtable.h

@@ -84,7 +84,7 @@
  * Define vmemmap for pfn_to_page & page_to_pfn calls. Needed if kernel
  * is configured with CONFIG_SPARSEMEM_VMEMMAP enabled.
  */
-#define vmemmap		((struct page *)VMEMMAP_START - (phys_ram_base >> PAGE_SHIFT))
+#define vmemmap		((struct page *)VMEMMAP_START - vmemmap_start_pfn)
 
 #define PCI_IO_SIZE      SZ_16M
 #define PCI_IO_END       VMEMMAP_START

arch/riscv/kernel/ftrace.c

@@ -8,6 +8,7 @@
 #include <linux/ftrace.h>
 #include <linux/uaccess.h>
 #include <linux/memory.h>
+#include <linux/stop_machine.h>
 #include <asm/cacheflush.h>
 #include <asm/patch.h>
 
@@ -75,8 +76,7 @@ static int __ftrace_modify_call(unsigned long hook_pos, unsigned long target,
 		make_call_t0(hook_pos, target, call);
 
 	/* Replace the auipc-jalr pair at once. Return -EPERM on write error. */
-	if (patch_text_nosync
-	    ((void *)hook_pos, enable ? call : nops, MCOUNT_INSN_SIZE))
+	if (patch_insn_write((void *)hook_pos, enable ? call : nops, MCOUNT_INSN_SIZE))
 		return -EPERM;
 
 	return 0;
@@ -88,7 +88,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 
 	make_call_t0(rec->ip, addr, call);
 
-	if (patch_text_nosync((void *)rec->ip, call, MCOUNT_INSN_SIZE))
+	if (patch_insn_write((void *)rec->ip, call, MCOUNT_INSN_SIZE))
 		return -EPERM;
 
 	return 0;
@@ -99,7 +99,7 @@ int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
 {
 	unsigned int nops[2] = {NOP4, NOP4};
 
-	if (patch_text_nosync((void *)rec->ip, nops, MCOUNT_INSN_SIZE))
+	if (patch_insn_write((void *)rec->ip, nops, MCOUNT_INSN_SIZE))
 		return -EPERM;
 
 	return 0;
@@ -120,6 +120,9 @@ int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec)
 	out = ftrace_make_nop(mod, rec, MCOUNT_ADDR);
 	mutex_unlock(&text_mutex);
 
+	if (!mod)
+		local_flush_icache_range(rec->ip, rec->ip + MCOUNT_INSN_SIZE);
+
 	return out;
 }
 
@@ -134,6 +137,42 @@ int ftrace_update_ftrace_func(ftrace_func_t func)
 
 	return ret;
 }
+
+struct ftrace_modify_param {
+	int command;
+	atomic_t cpu_count;
+};
+
+static int __ftrace_modify_code(void *data)
+{
+	struct ftrace_modify_param *param = data;
+
+	if (atomic_inc_return(&param->cpu_count) == num_online_cpus()) {
+		ftrace_modify_all_code(param->command);
+		/*
+		 * Make sure the patching store is effective *before* we
+		 * increment the counter which releases all waiting CPUs
+		 * by using the release variant of atomic increment. The
+		 * release pairs with the call to local_flush_icache_all()
+		 * on the waiting CPU.
+		 */
+		atomic_inc_return_release(&param->cpu_count);
+	} else {
+		while (atomic_read(&param->cpu_count) <= num_online_cpus())
+			cpu_relax();
+	}
+
+	local_flush_icache_all();
+
+	return 0;
+}
+
+void arch_ftrace_update_code(int command)
+{
+	struct ftrace_modify_param param = { command, ATOMIC_INIT(0) };
+
+	stop_machine(__ftrace_modify_code, &param, cpu_online_mask);
+}
 #endif
 
 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS

arch/riscv/kernel/patch.c

@@ -196,7 +196,7 @@ int patch_text_set_nosync(void *addr, u8 c, size_t len)
 }
 NOKPROBE_SYMBOL(patch_text_set_nosync);
 
-static int patch_insn_write(void *addr, const void *insn, size_t len)
+int patch_insn_write(void *addr, const void *insn, size_t len)
 {
 	size_t patched = 0;
 	size_t size;
@@ -240,16 +240,24 @@ static int patch_text_cb(void *data)
 	if (atomic_inc_return(&patch->cpu_count) == num_online_cpus()) {
 		for (i = 0; ret == 0 && i < patch->ninsns; i++) {
 			len = GET_INSN_LENGTH(patch->insns[i]);
-			ret = patch_text_nosync(patch->addr + i * len,
-						&patch->insns[i], len);
+			ret = patch_insn_write(patch->addr + i * len, &patch->insns[i], len);
 		}
-		atomic_inc(&patch->cpu_count);
+		/*
+		 * Make sure the patching store is effective *before* we
+		 * increment the counter which releases all waiting CPUs
+		 * by using the release variant of atomic increment. The
+		 * release pairs with the call to local_flush_icache_all()
+		 * on the waiting CPU.
+		 */
+		atomic_inc_return_release(&patch->cpu_count);
 	} else {
 		while (atomic_read(&patch->cpu_count) <= num_online_cpus())
 			cpu_relax();
 		smp_mb();
 	}
 
+	local_flush_icache_all();
+
 	return ret;
 }
 NOKPROBE_SYMBOL(patch_text_cb);

arch/riscv/kernel/probes/kprobes.c

@@ -29,7 +29,7 @@ static void __kprobes arch_prepare_ss_slot(struct kprobe *p)
 	p->ainsn.api.restore = (unsigned long)p->addr + offset;
 
 	patch_text_nosync(p->ainsn.api.insn, &p->opcode, 1);
-	patch_text_nosync(p->ainsn.api.insn + offset, &insn, 1);
+	patch_text_nosync((void *)p->ainsn.api.insn + offset, &insn, 1);
 }
 
 static void __kprobes arch_prepare_simulate(struct kprobe *p)