linux-kernel - [PATCH v3 8/9] KVM: MMU: fix kvm_mmu_pagetable

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4F911C56.7050709@linux.vnet.ibm.com>
Date:	Fri, 20 Apr 2012 16:20:38 +0800
From:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
To:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
CC:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: [PATCH v3 8/9] KVM: MMU: fix kvm_mmu_pagetable_walk tracepoint

P bit of page fault error code is missed in this tracepoint, fix it by
passing the full error code

Signed-off-by: Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
---
 arch/x86/kvm/mmutrace.h    |    7 +++----
 arch/x86/kvm/paging_tmpl.h |    3 +--
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/mmutrace.h b/arch/x86/kvm/mmutrace.h
index 84da94f..e762d35 100644
--- a/arch/x86/kvm/mmutrace.h
+++ b/arch/x86/kvm/mmutrace.h
@@ -54,8 +54,8 @@
  */
 TRACE_EVENT(
 	kvm_mmu_pagetable_walk,
-	TP_PROTO(u64 addr, int write_fault, int user_fault, int fetch_fault),
-	TP_ARGS(addr, write_fault, user_fault, fetch_fault),
+	TP_PROTO(u64 addr, u32 pferr),
+	TP_ARGS(addr, pferr),

 	TP_STRUCT__entry(
 		__field(__u64, addr)
@@ -64,8 +64,7 @@ TRACE_EVENT(

 	TP_fast_assign(
 		__entry->addr = addr;
-		__entry->pferr = (!!write_fault << 1) | (!!user_fault << 2)
-		                 | (!!fetch_fault << 4);
+		__entry->pferr = pferr;
 	),

 	TP_printk("addr %llx pferr %x %s", __entry->addr, __entry->pferr,
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index 80493fb..8e6aac9 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -154,8 +154,7 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker,
 	const int fetch_fault = access & PFERR_FETCH_MASK;
 	u16 errcode = 0;

-	trace_kvm_mmu_pagetable_walk(addr, write_fault, user_fault,
-				     fetch_fault);
+	trace_kvm_mmu_pagetable_walk(addr, access);
 retry_walk:
 	eperm = false;
 	walker->level = mmu->root_level;
-- 
1.7.7.6

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/