Hi All,
I tested the RC6 of kernel 5.14 today and unfortunately the issue still
exists. We have figured out that only P5040 SoCs are affected. [1]
P5020 SoCs display the correct values.
Please check the CPU changes in the PowerPC updates 5.13-1 and 5.13-2.
Thanks,
Christian
[1] https://forum.hyperion-entertainment.com/viewtopic.php?p=53775#p53775
On 09 August 2021 um 02:37 pm, Christian Zigotzky wrote:
Hi All,
Lscpu reports wrong values [1] since the RC1 of kernel 5.13 on my FSL
P5040 Cyrus+ board (A-EON AmigaOne X5000). [2]
The differences are:
Since the RC1 of kernel 5.13 (wrong values):
Core(s) per socket: 1
Socket(s): 3
Before (correct values):
Core(s) per socket: 4
Socket(s): 1
Through the wrong values, I can't use "-smp 4" with a virtual e5500
QEMU machine with KVM HV anymore. [3]
"-smp 3" works with KVM HV.
Maybe the file_load_64 commit from the PowerPC updates 5.13-2 is the
problem ( powerpc/kexec_file: Use current CPU info while setting up
FDT). [4]
Or maybe this change (PowerPC updates 5.13-1):
-#ifdef CONFIG_PPC_BOOK3E_64
- state->ctx_state = exception_enter();
- if (user_mode(regs))
- account_cpu_user_entry();
-#endif
---
Or maybe this change (PowerPC updates 5.13-1):
diff --git a/arch/powerpc/include/asm/smp.h
b/arch/powerpc/include/asm/smp.h
index 7a13bc20f0a0c..03b3d010cbab6 100644
--- a/arch/powerpc/include/asm/smp.h
+++ b/arch/powerpc/include/asm/smp.h
@@ -31,6 +31,7 @@ extern u32 *cpu_to_phys_id;
extern bool coregroup_enabled;
extern int cpu_to_chip_id(int cpu);
+extern int *chip_id_lookup_table;
#ifdef CONFIG_SMP
@@ -121,6 +122,11 @@ static inline struct cpumask
*cpu_sibling_mask(int cpu)
return per_cpu(cpu_sibling_map, cpu);
}
+static inline struct cpumask *cpu_core_mask(int cpu)
+{
+ return per_cpu(cpu_core_map, cpu);
+}
+
static inline struct cpumask *cpu_l2_cache_mask(int cpu)
{
return per_cpu(cpu_l2_cache_map, cpu);
---
I have found a lot of other changes in the PowerPC updates 5.13-1
regarding the CPU.
Could you please check the CPU changes in the PowerPC updates 5.13-1
and 5.13-2?
Please find attached the kernel 5.14-rc5 config.
Thanks,
Christian
[1]
lscpu with the correct values before the RC1 of kernel 5.13:
Architecture: ppc64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Big Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 1
Core(s) per socket: 4
Socket(s): 1
Model: 1.2 (pvr 8024 0012)
Model name: e5500
L1d cache: 128 KiB
L1i cache: 128 KiB
L2 cache: 2 MiB
L3 cache: 2 MiB
Vulnerability Itlb multihit: Not affected
Vulnerability L1tf: Not affected
Vulnerability Mds: Not affected
Vulnerability Meltdown: Not affected
Vulnerability Spec store bypass: Not affected
Vulnerability Spectre v1: Mitigation; __user pointer sanitization
Vulnerability Spectre v2: Mitigation; Branch predictor state flush
Vulnerability Srbds: Not affected
Vulnerability Tsx async abort: Not affected
---
lscpu with the wrong values since the RC1 of kernel 5.13:
Architecture: ppc64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Big Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 1
Core(s) per socket: 1
Socket(s): 3
Model: 1.2 (pvr 8024 0012)
Model name: e5500
L1d cache: 128 KiB
L1i cache: 128 KiB
L2 cache: 2 MiB
L3 cache: 2 MiB
Vulnerability Itlb multihit: Not affected
Vulnerability L1tf: Not affected
Vulnerability Mds: Not affected
Vulnerability Meltdown: Not affected
Vulnerability Spec store bypass: Not affected
Vulnerability Spectre v1: Mitigation; __user pointer sanitization
Vulnerability Spectre v2: Mitigation; Branch predictor state flush
Vulnerability Srbds: Not affected
Vulnerability Tsx async abort: Not affected
---
[2] http://wiki.amiga.org/index.php?title=X5000
[3] https://lists.ozlabs.org/pipermail/linuxppc-dev/2021-May/229103.html
[4]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/diff/arch/powerpc/kexec/file_load_64.c?id=ab159ac569fddf812c0a217d6dbffaa5d93ef88f
