From 969251a5a4d3515abc233621bc8ca6f1c93d6dd4 Mon Sep 17 00:00:00 2001 From: Sagar Shrikant Kadam Date: Sun, 28 Jun 2020 07:45:01 -0700 Subject: [PATCH] uclass: cpu: fix to display proper CPU features The cmd "cpu detail" fetches uninitialized cpu feature information and thus displays wrong / inconsitent details as below. For eg: FU540-C000 doesn't have any microcode, yet the cmd display's it. => cpu detail 1: cpu@1 rv64imafdc ID = 1, freq = 999.100 MHz: L1 cache, MMU, Microcode, Device ID Microcode version 0x0 Device ID 0x0 2: cpu@2 rv64imafdc ID = 2, freq = 999.100 MHz: L1 cache, MMU, Microcode, Device ID Microcode version 0x0 Device ID 0x0 3: cpu@3 rv64imafdc ID = 3, freq = 999.100 MHz: L1 cache, MMU, Microcode, Device ID Microcode version 0x0 Device ID 0x0 4: cpu@4 rv64imafdc ID = 4, freq = 999.100 MHz: L1 cache, MMU, Microcode, Device ID Microcode version 0x0 Device ID 0x0 The L1 cache or MMU entry seen above is also displayed inconsistently. So initialize cpu information to zero into cpu-uclass itself so that similar issues can be avoided for other CPU drivers. We now see correct features as: => cpu detail 1: cpu@1 rv64imafdc ID = 1, freq = 999.100 MHz 2: cpu@2 rv64imafdc ID = 2, freq = 999.100 MHz 3: cpu@3 rv64imafdc ID = 3, freq = 999.100 MHz 4: cpu@4 rv64imafdc ID = 4, freq = 999.100 MHz Signed-off-by: Sagar Shrikant Kadam Reviewed-by: Pragnesh Patel Reviewed-by: Bin Meng --- drivers/cpu/cpu-uclass.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/cpu/cpu-uclass.c b/drivers/cpu/cpu-uclass.c index 7418c26ed8..cbb4419ec0 100644 --- a/drivers/cpu/cpu-uclass.c +++ b/drivers/cpu/cpu-uclass.c @@ -86,6 +86,9 @@ int cpu_get_info(struct udevice *dev, struct cpu_info *info) if (!ops->get_info) return -ENOSYS; + /* Init cpu_info to 0 */ + memset(info, 0, sizeof(struct cpu_info)); + return ops->get_info(dev, info); } -- 2.39.5