On 8/9/20 7:42 PM, Christian Zigotzky wrote:
Hello,
The Nemo board (A-EON AmigaOne X1000) [1] doesn't start with the latest
Git kernel anymore after the commit "powerpc/book3s64/pkeys: Simplify
pkey disable branch" [2].
I bisected today [3].
Result: powerpc/book3s64/pkeys: Simplify pkey disable branch
(a4678d4b477c3d2901f101986ca01406f3b7eaea) [2] is the first bad commit.
Unfortunately I wasn't able to revert the first bad commit. The first
bad commit depends on many other commits, which unfortunately I don't
know. I tried to remove the modifications of the files from the first
bad commit but without any success. There are just too many dependencies.
Additionally I reverted the commit "selftests/powerpc: Fix pkey syscall
redefinitions" [4] and compiled a new kernel but without any success.
Could you please check the first bad commit?
Thanks,
Christian
Can you share a successful boot log of the system so that i can double
check the cpu_feature and mmu_feature reported ? I am looking for
details similar to below.
[ 0.000000] cpu_features = 0x0001c07f8f5f91a7
[ 0.000000] possible = 0x0001fbffcf5fb1a7
[ 0.000000] always = 0x00000003800081a1
[ 0.000000] cpu_user_features = 0xdc0065c2 0xefe00000
[ 0.000000] mmu_features = 0x7c006001
[ 0.000000] firmware_features = 0x0000001fc45bfc57
[ 0.000000] vmalloc start = 0xc008000000000000
[ 0.000000] IO start = 0xc00a000000000000
[ 0.000000] vmemmap start = 0xc00c000000000000
IIUC this is P5+? (ISA 2.04). On that pkey should be marked disabled via
static int scan_pkey_feature(void)
{
int ret;
int pkeys_total = 0;
....
/*
* Only P7 and above supports SPRN_AMR update with MSR[PR] = 1
*/
if (!early_cpu_has_feature(CPU_FTR_ARCH_206))
return 0;
}
Can you boot with CONFIG_PPC_MEM_KEYS=n ?
-aneesh
