diff options
| author | Tamas K Lengyel <tamas.lengyel@intel.com> | 2021-01-18 12:46:37 -0500 |
|---|---|---|
| committer | Andrew Cooper <andrew.cooper3@citrix.com> | 2021-02-05 17:37:28 +0000 |
| commit | c5866ab93167a73a8d4d85b844edf4aa364a1aaa (patch) | |
| tree | 39f2e35e5bf9881e688cafd37939db5cce1f2120 /xen | |
| parent | 9744611991a042e9aea348c5721b80cc2101c7e5 (diff) | |
x86/vm_event: Carry the vmtrace buffer position in vm_event
Add vmtrace_pos field to x86 regs in vm_event. Initialized to ~0 if
vmtrace is not in use.
Signed-off-by: Tamas K Lengyel <tamas.lengyel@intel.com>
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Release-Acked-by: Ian Jackson <iwj@xenproject.org>
Diffstat (limited to 'xen')
| -rw-r--r-- | xen/arch/x86/vm_event.c | 3 | ||||
| -rw-r--r-- | xen/include/public/vm_event.h | 7 |
2 files changed, 10 insertions, 0 deletions
diff --git a/xen/arch/x86/vm_event.c b/xen/arch/x86/vm_event.c index 848d69c1b0..36272e9316 100644 --- a/xen/arch/x86/vm_event.c +++ b/xen/arch/x86/vm_event.c @@ -251,6 +251,9 @@ void vm_event_fill_regs(vm_event_request_t *req) req->data.regs.x86.shadow_gs = ctxt.shadow_gs; req->data.regs.x86.dr6 = ctxt.dr6; + + if ( hvm_vmtrace_output_position(curr, &req->data.regs.x86.vmtrace_pos) != 1 ) + req->data.regs.x86.vmtrace_pos = ~0; #endif } diff --git a/xen/include/public/vm_event.h b/xen/include/public/vm_event.h index 141ea024a3..147dc3ea73 100644 --- a/xen/include/public/vm_event.h +++ b/xen/include/public/vm_event.h @@ -223,6 +223,13 @@ struct vm_event_regs_x86 { */ uint64_t npt_base; + /* + * Current position in the vmtrace buffer, or ~0 if vmtrace is not active. + * + * For Intel Processor Trace, it is the upper half of MSR_RTIT_OUTPUT_MASK. + */ + uint64_t vmtrace_pos; + uint32_t cs_base; uint32_t ss_base; uint32_t ds_base; |