[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v7 10/10] x86/vm_event: Carry Processor Trace buffer offset in vm_event
From: Tamas K Lengyel <tamas.lengyel@xxxxxxxxx> Add pt_offset field to x86 regs in vm_event. Initialized to ~0 if PT is not in use. Signed-off-by: Tamas K Lengyel <tamas.lengyel@xxxxxxxxx> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> --- CC: Jan Beulich <JBeulich@xxxxxxxx> CC: Roger Pau Monné <roger.pau@xxxxxxxxxx> CC: Wei Liu <wl@xxxxxxx> CC: Jun Nakajima <jun.nakajima@xxxxxxxxx> CC: Kevin Tian <kevin.tian@xxxxxxxxx> CC: Michał Leszczyński <michal.leszczynski@xxxxxxx> CC: Tamas K Lengyel <tamas@xxxxxxxxxxxxx> v7: * New --- xen/arch/x86/vm_event.c | 3 +++ xen/include/public/vm_event.h | 6 ++++++ 2 files changed, 9 insertions(+) diff --git a/xen/arch/x86/vm_event.c b/xen/arch/x86/vm_event.c index 848d69c1b0..09dfc0924e 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.pt_offset) != 1 ) + req->data.regs.x86.pt_offset = ~0; #endif } diff --git a/xen/include/public/vm_event.h b/xen/include/public/vm_event.h index 141ea024a3..57f34bf902 100644 --- a/xen/include/public/vm_event.h +++ b/xen/include/public/vm_event.h @@ -223,6 +223,12 @@ struct vm_event_regs_x86 { */ uint64_t npt_base; + /* + * Current offset in the Processor Trace buffer. For Intel Processor Trace + * this is MSR_RTIT_OUTPUT_MASK. Set to ~0 if no Processor Trace is active. + */ + uint64_t pt_offset; + uint32_t cs_base; uint32_t ss_base; uint32_t ds_base; -- 2.11.0
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |