diff mbox

[1/3] x86/mm: introduce trace point for mmio_ro emulation

Message ID 20170830171112.3634-2-wei.liu2@citrix.com (mailing list archive)
State New, archived
Headers show

Commit Message

Wei Liu Aug. 30, 2017, 5:11 p.m. UTC 
Using ptrw_emulation trace point is wrong.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
 xen/arch/x86/mm.c                | 2 +-
 xen/include/asm-x86/perfc_defn.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

Comments

Jan Beulich Aug. 31, 2017, 8:12 a.m. UTC | #1 
>>> On 30.08.17 at 19:11, <wei.liu2@citrix.com> wrote:
> Using ptrw_emulation trace point is wrong.
> 
> Signed-off-by: Wei Liu <wei.liu2@citrix.com>

Acked-by: Jan Beulich <jbeulich@suse.com>
diff mbox

Patch

diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 1f23470cef..ed80df02fa 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -5397,7 +5397,7 @@  int mmio_ro_do_page_fault(struct vcpu *v, unsigned long addr,
 
         /* Fallthrough */
     case X86EMUL_RETRY:
-        perfc_incr(ptwr_emulations);
+        perfc_incr(mmio_ro_emulations);
         return EXCRET_fault_fixed;
     }
 
diff --git a/xen/include/asm-x86/perfc_defn.h b/xen/include/asm-x86/perfc_defn.h
index aac9331843..6db8746906 100644
--- a/xen/include/asm-x86/perfc_defn.h
+++ b/xen/include/asm-x86/perfc_defn.h
@@ -30,6 +30,7 @@  PERFCOUNTER(copy_user_faults,       "copy_user faults")
 
 PERFCOUNTER(map_domain_page_count,  "map_domain_page count")
 PERFCOUNTER(ptwr_emulations,        "writable pt emulations")
+PERFCOUNTER(mmio_ro_emulations,     "mmio ro emulations")
 
 PERFCOUNTER(exception_fixed,        "pre-exception fixed")