Revision f939a5f432981872f89d4dfe506e959f49cc161a authored by Dave Airlie on 24 June 2016, 00:51:12 UTC, committed by Dave Airlie on 24 June 2016, 00:51:12 UTC
A bit bigger than I would normally like, but most of the large changes are for polaris support and since polaris went upstream in 4.7, I'd like to get the fixes in so it's in good shape when the hw becomes available. The major changes only touch the polaris code so there is little chance for regressions on other asics. The rest are just the usual collection of bug fixes. * 'drm-fixes-4.7' of git://people.freedesktop.org/~agd5f/linux: drm/amd/powerplay: enable clock stretch feature for polaris drm/amdgpu/gfx8: update golden setting for polaris10 drm/amd/powerplay: enable avfs feature for polaris drm/amdgpu/atombios: add avfs struct for Polaris10/11 drm/amd/powerplay: add avfs related define for polaris drm/amd/powrplay: enable stutter_mode for polaris. drm/amd/powerplay: disable UVD SMU handshake for MCLK. drm/amd/powerplay: initialize variables which were missed. drm/amd/powerplay: enable PowerContainment feature for polaris10/11. drm/amd/powerplay: need to notify system bios pcie device ready drm/amd/powerplay: fix bug that function parameter was incorect. drm/amd/powerplay: fix logic error. drm/amdgpu: initialize amdgpu_cgs_acpi_eval_object result value drm/amdgpu: precedence bug in amdgpu_device_init() drm/amdgpu: fix num_rbs exposed to userspace (v2) drm/amdgpu: missing bounds check in amdgpu_set_pp_force_state()
nmi_backtrace.c
/*
* NMI backtrace support
*
* Gratuitously copied from arch/x86/kernel/apic/hw_nmi.c by Russell King,
* with the following header:
*
* HW NMI watchdog support
*
* started by Don Zickus, Copyright (C) 2010 Red Hat, Inc.
*
* Arch specific calls to support NMI watchdog
*
* Bits copied from original nmi.c file
*/
#include <linux/cpumask.h>
#include <linux/delay.h>
#include <linux/kprobes.h>
#include <linux/nmi.h>
#ifdef arch_trigger_all_cpu_backtrace
/* For reliability, we're prepared to waste bits here. */
static DECLARE_BITMAP(backtrace_mask, NR_CPUS) __read_mostly;
/* "in progress" flag of arch_trigger_all_cpu_backtrace */
static unsigned long backtrace_flag;
/*
* When raise() is called it will be is passed a pointer to the
* backtrace_mask. Architectures that call nmi_cpu_backtrace()
* directly from their raise() functions may rely on the mask
* they are passed being updated as a side effect of this call.
*/
void nmi_trigger_all_cpu_backtrace(bool include_self,
void (*raise)(cpumask_t *mask))
{
int i, this_cpu = get_cpu();
if (test_and_set_bit(0, &backtrace_flag)) {
/*
* If there is already a trigger_all_cpu_backtrace() in progress
* (backtrace_flag == 1), don't output double cpu dump infos.
*/
put_cpu();
return;
}
cpumask_copy(to_cpumask(backtrace_mask), cpu_online_mask);
if (!include_self)
cpumask_clear_cpu(this_cpu, to_cpumask(backtrace_mask));
if (!cpumask_empty(to_cpumask(backtrace_mask))) {
pr_info("Sending NMI to %s CPUs:\n",
(include_self ? "all" : "other"));
raise(to_cpumask(backtrace_mask));
}
/* Wait for up to 10 seconds for all CPUs to do the backtrace */
for (i = 0; i < 10 * 1000; i++) {
if (cpumask_empty(to_cpumask(backtrace_mask)))
break;
mdelay(1);
touch_softlockup_watchdog();
}
/*
* Force flush any remote buffers that might be stuck in IRQ context
* and therefore could not run their irq_work.
*/
printk_nmi_flush();
clear_bit_unlock(0, &backtrace_flag);
put_cpu();
}
bool nmi_cpu_backtrace(struct pt_regs *regs)
{
int cpu = smp_processor_id();
if (cpumask_test_cpu(cpu, to_cpumask(backtrace_mask))) {
pr_warn("NMI backtrace for cpu %d\n", cpu);
if (regs)
show_regs(regs);
else
dump_stack();
cpumask_clear_cpu(cpu, to_cpumask(backtrace_mask));
return true;
}
return false;
}
NOKPROBE_SYMBOL(nmi_cpu_backtrace);
#endif
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