#include <linux/errno.h>
#include <linux/bug.h>
#include <asm/ptrace.h>
+#include <asm/fpu/api.h>
+#include <asm/fpu/types.h>
u64 perf_reg_value(struct pt_regs *regs, int idx)
{
+ freg_t fp;
+
if (WARN_ON_ONCE((u32)idx >= PERF_REG_S390_MAX))
return 0;
+ if (idx >= PERF_REG_S390_R0 && idx <= PERF_REG_S390_R15)
+ return regs->gprs[idx];
+
+ if (idx >= PERF_REG_S390_FP0 && idx <= PERF_REG_S390_FP15) {
+ if (!user_mode(regs))
+ return 0;
+
+ idx -= PERF_REG_S390_FP0;
+ fp = MACHINE_HAS_VX ? *(freg_t *)(current->thread.fpu.vxrs + idx)
+ : current->thread.fpu.fprs[idx];
+ return fp.ui;
+ }
+
if (idx == PERF_REG_S390_MASK)
return regs->psw.mask;
if (idx == PERF_REG_S390_PC)
/*
* Use the regs from the first interruption and let
* perf_sample_regs_intr() handle interrupts (regs == get_irq_regs()).
+ *
+ * Also save FPU registers for user-space tasks only.
*/
regs_user->regs = task_pt_regs(current);
+ if (user_mode(regs_user->regs))
+ save_fpu_regs();
regs_user->abi = perf_reg_abi(current);
}