This adds support for "output to Trace Transport subsystem" capability
of Intel PT. It means that PT can output its trace to an MMIO address
range rather than system memory buffer.
Acked-by: Song Liu <songliubraving@xxxxxx>
Signed-off-by: Luwei Kang <luwei.kang@xxxxxxxxx>
---
arch/x86/events/intel/pt.c | 1 +
arch/x86/include/asm/intel_pt.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c
index bac781b..7043a10 100644
--- a/arch/x86/events/intel/pt.c
+++ b/arch/x86/events/intel/pt.c
@@ -68,6 +68,7 @@
PT_CAP(topa_output, 0, CPUID_ECX, BIT(0)),
PT_CAP(topa_multiple_entries, 0, CPUID_ECX, BIT(1)),
PT_CAP(single_range_output, 0, CPUID_ECX, BIT(2)),
+ PT_CAP(output_subsys, 0, CPUID_ECX, BIT(3)),
PT_CAP(payloads_lip, 0, CPUID_ECX, BIT(31)),
PT_CAP(num_address_ranges, 1, CPUID_EAX, 0x3),
PT_CAP(mtc_periods, 1, CPUID_EAX, 0xffff0000),
diff --git a/arch/x86/include/asm/intel_pt.h b/arch/x86/include/asm/intel_pt.h
index e2f80b6..525ace6 100644
--- a/arch/x86/include/asm/intel_pt.h
+++ b/arch/x86/include/asm/intel_pt.h
@@ -16,6 +16,7 @@ enum pt_capabilities {
PT_CAP_topa_output,
PT_CAP_topa_multiple_entries,
PT_CAP_single_range_output,
+ PT_CAP_output_subsys,
PT_CAP_payloads_lip,
PT_CAP_num_address_ranges,
PT_CAP_mtc_periods,
--
1.8.3.1
