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| author | Otavio Salvador <otavio@ossystems.com.br> | 2017-03-17 17:57:30 -0300 |
|---|---|---|
| committer | Otavio Salvador <otavio@ossystems.com.br> | 2017-03-17 17:57:30 -0300 |
| commit | a4418c438de6ad397fd17f006ca86257fb9ec5a6 (patch) | |
| tree | 7d3d0aae806d05271a8952e9db50ff0d0e9ce22a /arch/arm/kernel | |
| parent | 94b0fc511e4db848d7bd0260dad0e977d3da2d72 (diff) | |
| parent | d9e0350d2575a20ee7783427da9bd6b6107eb983 (diff) | |
Merge tag 'v4.1.39' into 4.1-2.0.x-imx
Linux 4.1.39
* tag 'v4.1.39': (138 commits)
Linux 4.1.39
KVM: x86: remove data variable from kvm_get_msr_common
KVM: VMX: Fix host initiated access to guest MSR_TSC_AUX
KVM: x86: pass host_initiated to functions that read MSRs
perf/core: Fix the perf_cpu_time_max_percent check
perf/core: Make sysctl_perf_cpu_time_max_percent conform to documentation
perf/core: Fix implicitly enable dynamic interrupt throttle
perf/core: Fix dynamic interrupt throttle
Fix missing sanity check in /dev/sg
printk: use rcuidle console tracepoint
vfs: fix uninitialized flags in splice_to_pipe()
drm/radeon: Use mode h/vdisplay fields to hide out of bounds HW cursor
ARM: 8658/1: uaccess: fix zeroing of 64-bit get_user()
drm/dp/mst: fix kernel oops when turning off secondary monitor
[media] siano: make it work again with CONFIG_VMAP_STACK
mmc: core: fix multi-bit bus width without high-speed mode
futex: Move futex_init() to core_initcall
xen-netfront: Delete rx_refill_timer in xennet_disconnect_backend()
scsi: aacraid: Fix INTx/MSI-x issue with older controllers
cpumask: use nr_cpumask_bits for parsing functions
...
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/hw_breakpoint.c | 16 | ||||
| -rw-r--r-- | arch/arm/kernel/ptrace.c | 2 |
2 files changed, 17 insertions, 1 deletions
diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c index dc7d0a95bd36..c02c06b1f755 100644 --- a/arch/arm/kernel/hw_breakpoint.c +++ b/arch/arm/kernel/hw_breakpoint.c @@ -1067,6 +1067,22 @@ static int __init arch_hw_breakpoint_init(void) return 0; } + /* + * Scorpion CPUs (at least those in APQ8060) seem to set DBGPRSR.SPD + * whenever a WFI is issued, even if the core is not powered down, in + * violation of the architecture. When DBGPRSR.SPD is set, accesses to + * breakpoint and watchpoint registers are treated as undefined, so + * this results in boot time and runtime failures when these are + * accessed and we unexpectedly take a trap. + * + * It's not clear if/how this can be worked around, so we blacklist + * Scorpion CPUs to avoid these issues. + */ + if (read_cpuid_part() == ARM_CPU_PART_SCORPION) { + pr_info("Scorpion CPU detected. Hardware breakpoints and watchpoints disabled\n"); + return 0; + } + has_ossr = core_has_os_save_restore(); /* Determine how many BRPs/WRPs are available. */ diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c index 4d9375814b53..d54c53b7ab63 100644 --- a/arch/arm/kernel/ptrace.c +++ b/arch/arm/kernel/ptrace.c @@ -600,7 +600,7 @@ static int gpr_set(struct task_struct *target, const void *kbuf, const void __user *ubuf) { int ret; - struct pt_regs newregs; + struct pt_regs newregs = *task_pt_regs(target); ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &newregs, |