Messages in this thread Patch in this message | | | From | Kuppuswamy Sathyanarayanan <> | Subject | [PATCH v1 1/4] x86/tdx: Add #VE tracepoint | Date | Sat, 26 Jun 2021 07:32:41 -0700 |
| |
From: Sean Christopherson <sean.j.christopherson@intel.com>
Add tracepoint for tracing TDX guest #VE exceptions. It will dump RIP, exit reason, exit qual, GPA, instruction length and instruction info for each #VE exception occurred.
Also, make trace points RCU idle safe to avoid warnings when RCU debugging is enabled.
Reviewed-by: Andi Kleen <ak@linux.intel.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> --- arch/x86/include/asm/trace/tdx.h | 51 ++++++++++++++++++++++++++++++++ arch/x86/kernel/tdx.c | 6 ++++ 2 files changed, 57 insertions(+) create mode 100644 arch/x86/include/asm/trace/tdx.h
diff --git a/arch/x86/include/asm/trace/tdx.h b/arch/x86/include/asm/trace/tdx.h new file mode 100644 index 000000000000..e045e276009e --- /dev/null +++ b/arch/x86/include/asm/trace/tdx.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#if !defined(_TRACE_TDX_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_TDX_H + +#include <linux/tracepoint.h> + +#include <uapi/asm/vmx.h> + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM tdx + +#ifdef CONFIG_INTEL_TDX_GUEST + +TRACE_EVENT(tdg_virtualization_exception, + TP_PROTO(u64 rip, u32 exit_reason, u64 exit_qual, + u64 gpa, u32 instr_len, u32 instr_info), + TP_ARGS(rip, exit_reason, exit_qual, gpa, instr_len, + instr_info), + TP_STRUCT__entry( + __field(u64, rip) + __field(u64, exit_qual) + __field(u64, gpa) + __field(u32, exit_reason) + __field(u32, instr_len) + __field(u32, instr_info) + ), + TP_fast_assign( + __entry->rip = rip; + __entry->exit_qual = exit_qual; + __entry->gpa = gpa; + __entry->exit_reason = exit_reason; + __entry->instr_len = instr_len; + __entry->instr_info = instr_info; + ), + TP_printk("reason %s rip 0x%016llx len %u info 0x%08x qual 0x%016llx gpa 0x%016llx", + __print_symbolic(__entry->exit_reason, VMX_EXIT_REASONS), + __entry->rip, __entry->instr_len, __entry->instr_info, + __entry->exit_qual, __entry->gpa + ) + ); + +#endif // CONFIG_INTEL_TDX_GUEST + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH asm/trace/ +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE tdx +#endif /* _TRACE_TDX_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h> diff --git a/arch/x86/kernel/tdx.c b/arch/x86/kernel/tdx.c index 4639206d99f3..67687cf3e631 100644 --- a/arch/x86/kernel/tdx.c +++ b/arch/x86/kernel/tdx.c @@ -16,6 +16,9 @@ #include <linux/sched/signal.h> /* force_sig_fault() */ #include <linux/swiotlb.h> +#define CREATE_TRACE_POINTS +#include <asm/trace/tdx.h> + /* TDX Module call Leaf IDs */ #define TDINFO 1 #define TDGETVEINFO 3 @@ -407,6 +410,9 @@ int tdg_handle_virtualization_exception(struct pt_regs *regs, unsigned long val; int ret = 0; + trace_tdg_virtualization_exception_rcuidle(regs->ip, ve->exit_reason, + ve->exit_qual, ve->gpa, ve->instr_len, ve->instr_info); + switch (ve->exit_reason) { case EXIT_REASON_HLT: tdg_halt(); -- 2.25.1
| |