From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Xen-devel <xen-devel@lists.xenproject.org>
Cc: "Tamas K Lengyel" <tamas.lengyel@intel.com>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
"Jan Beulich" <JBeulich@suse.com>,
"Roger Pau Monné" <roger.pau@citrix.com>, "Wei Liu" <wl@xen.org>,
"Jun Nakajima" <jun.nakajima@intel.com>,
"Kevin Tian" <kevin.tian@intel.com>,
"Michał Leszczyński" <michal.leszczynski@cert.pl>,
"Tamas K Lengyel" <tamas@tklengyel.com>
Subject: [PATCH v7 10/10] x86/vm_event: Carry Processor Trace buffer offset in vm_event
Date: Thu, 21 Jan 2021 21:27:18 +0000 [thread overview]
Message-ID: <20210121212718.2441-11-andrew.cooper3@citrix.com> (raw)
In-Reply-To: <20210121212718.2441-1-andrew.cooper3@citrix.com>
From: Tamas K Lengyel <tamas.lengyel@intel.com>
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@intel.com>
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Jan Beulich <JBeulich@suse.com>
CC: Roger Pau Monné <roger.pau@citrix.com>
CC: Wei Liu <wl@xen.org>
CC: Jun Nakajima <jun.nakajima@intel.com>
CC: Kevin Tian <kevin.tian@intel.com>
CC: Michał Leszczyński <michal.leszczynski@cert.pl>
CC: Tamas K Lengyel <tamas@tklengyel.com>
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
next prev parent reply other threads:[~2021-01-21 21:53 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-21 21:27 [PATCH v7 00/10] Implement support for external IPT monitoring Andrew Cooper
2021-01-21 21:27 ` [PATCH v7 01/10] xen+tools: Introduce XEN_SYSCTL_PHYSCAP_vmtrace Andrew Cooper
2021-01-22 15:28 ` Ian Jackson
2021-01-26 8:58 ` Julien Grall
2021-01-26 10:04 ` Andrew Cooper
2021-01-21 21:27 ` [PATCH v7 02/10] xen/domain: Add vmtrace_frames domain creation parameter Andrew Cooper
2021-01-25 15:08 ` Jan Beulich
2021-01-25 17:17 ` Andrew Cooper
2021-01-26 10:51 ` Jan Beulich
2021-01-29 16:37 ` Jan Beulich
2021-01-21 21:27 ` [PATCH v7 03/10] tools/[lib]xl: Add vmtrace_buf_size parameter Andrew Cooper
2021-01-22 15:29 ` Ian Jackson
2021-01-21 21:27 ` [PATCH v7 04/10] xen/memory: Add a vmtrace_buf resource type Andrew Cooper
2021-01-25 16:31 ` Jan Beulich
2021-01-26 7:37 ` Jan Beulich
2021-01-26 9:58 ` Andrew Cooper
2021-01-26 10:30 ` Jan Beulich
2021-01-21 21:27 ` [PATCH v7 05/10] x86/vmx: Add Intel Processor Trace support Andrew Cooper
2021-01-26 13:35 ` Jan Beulich
2021-01-29 22:08 ` Andrew Cooper
2021-01-21 21:27 ` [PATCH v7 06/10] xen/domctl: Add XEN_DOMCTL_vmtrace_op Andrew Cooper
2021-01-26 14:18 ` Jan Beulich
2021-01-29 23:01 ` Andrew Cooper
2021-01-21 21:27 ` [PATCH v7 07/10] tools/libxc: Add xc_vmtrace_* functions Andrew Cooper
2021-01-22 15:29 ` Ian Jackson
2021-01-21 21:27 ` [PATCH v7 08/10] tools/misc: Add xen-vmtrace tool Andrew Cooper
2021-01-22 15:33 ` Ian Jackson
2021-01-25 15:30 ` Andrew Cooper
2021-01-26 11:59 ` Ian Jackson
2021-01-26 12:55 ` Andrew Cooper
2021-01-26 13:32 ` Ian Jackson
2021-01-26 15:59 ` Andrew Cooper
2021-01-21 21:27 ` [PATCH v7 09/10] xen/vmtrace: support for VM forks Andrew Cooper
2021-01-26 14:21 ` Jan Beulich
2021-01-27 15:50 ` Lengyel, Tamas
2021-01-21 21:27 ` Andrew Cooper [this message]
2021-01-26 14:27 ` [PATCH v7 10/10] x86/vm_event: Carry Processor Trace buffer offset in vm_event Jan Beulich
2021-01-29 23:22 ` Andrew Cooper
2021-01-29 23:40 ` Tamas K Lengyel
2021-02-01 8:55 ` Jan Beulich
2021-02-01 9:06 ` Andrew Cooper
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