Merge tag 'riscv-for-linus-6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V fixes from Palmer Dabbelt:

 - PERF_TYPE_BREAKPOINT now returns -EOPNOTSUPP instead of -ENOENT,
   which aligns to other ports and is a saner value

 - The KASAN-related stack size increasing logic has been moved to a C
   header, to avoid dependency issues

* tag 'riscv-for-linus-6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Fix kernel stack size when KASAN is enabled
  drivers/perf: riscv: Align errno for unsupported perf event

Author: torvalds

arch/riscv/Kconfig

@@ -777,8 +777,7 @@ config IRQ_STACKS
 config THREAD_SIZE_ORDER
 	int "Kernel stack size (in power-of-two numbers of page size)" if VMAP_STACK && EXPERT
 	range 0 4
-	default 1 if 32BIT && !KASAN
-	default 3 if 64BIT && KASAN
+	default 1 if 32BIT
 	default 2
 	help
 	  Specify the Pages of thread stack size (from 4KB to 64KB), which also

arch/riscv/include/asm/thread_info.h

@@ -13,7 +13,12 @@
 #include <linux/sizes.h>
 
 /* thread information allocation */
-#define THREAD_SIZE_ORDER	CONFIG_THREAD_SIZE_ORDER
+#ifdef CONFIG_KASAN
+#define KASAN_STACK_ORDER	1
+#else
+#define KASAN_STACK_ORDER	0
+#endif
+#define THREAD_SIZE_ORDER	(CONFIG_THREAD_SIZE_ORDER + KASAN_STACK_ORDER)
 #define THREAD_SIZE		(PAGE_SIZE << THREAD_SIZE_ORDER)
 
 /*

drivers/perf/riscv_pmu_legacy.c

@@ -22,13 +22,13 @@ static int pmu_legacy_ctr_get_idx(struct perf_event *event)
 	struct perf_event_attr *attr = &event->attr;
 
 	if (event->attr.type != PERF_TYPE_HARDWARE)
-		return -EOPNOTSUPP;
+		return -ENOENT;
 	if (attr->config == PERF_COUNT_HW_CPU_CYCLES)
 		return RISCV_PMU_LEGACY_CYCLE;
 	else if (attr->config == PERF_COUNT_HW_INSTRUCTIONS)
 		return RISCV_PMU_LEGACY_INSTRET;
 	else
-		return -EOPNOTSUPP;
+		return -ENOENT;
 }
 
 /* For legacy config & counter index are same */

drivers/perf/riscv_pmu_sbi.c

@@ -309,7 +309,7 @@ static void pmu_sbi_check_event(struct sbi_pmu_event_data *edata)
 			  ret.value, 0x1, SBI_PMU_STOP_FLAG_RESET, 0, 0, 0);
 	} else if (ret.error == SBI_ERR_NOT_SUPPORTED) {
 		/* This event cannot be monitored by any counter */
-		edata->event_idx = -EINVAL;
+		edata->event_idx = -ENOENT;
 	}
 }
 
@@ -556,7 +556,7 @@ static int pmu_sbi_event_map(struct perf_event *event, u64 *econfig)
 		}
 		break;
 	default:
-		ret = -EINVAL;
+		ret = -ENOENT;
 		break;
 	}