diff options
Diffstat (limited to 'arch/arm64/include/asm/el2_setup.h')
| -rw-r--r-- | arch/arm64/include/asm/el2_setup.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/el2_setup.h b/arch/arm64/include/asm/el2_setup.h index d77d358f9395..bda918948471 100644 --- a/arch/arm64/include/asm/el2_setup.h +++ b/arch/arm64/include/asm/el2_setup.h @@ -65,6 +65,19 @@ // use EL1&0 translation. .Lskip_spe_\@: + /* Trace buffer */ + ubfx x0, x1, #ID_AA64DFR0_TRBE_SHIFT, #4 + cbz x0, .Lskip_trace_\@ // Skip if TraceBuffer is not present + + mrs_s x0, SYS_TRBIDR_EL1 + and x0, x0, TRBIDR_PROG + cbnz x0, .Lskip_trace_\@ // If TRBE is available at EL2 + + mov x0, #(MDCR_EL2_E2TB_MASK << MDCR_EL2_E2TB_SHIFT) + orr x2, x2, x0 // allow the EL1&0 translation + // to own it. + +.Lskip_trace_\@: msr mdcr_el2, x2 // Configure debug traps .endm |