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[Part2,v6,33/49] KVM: x86: Update page-fault trace to log full 64-bit error code

Message ID a937386611dc7d38981c8a08255c4a71f1295d9a.1655761627.git.ashish.kalra@amd.com (mailing list archive)
State New
Headers show
Series Add AMD Secure Nested Paging (SEV-SNP) | expand

Commit Message

Kalra, Ashish June 20, 2022, 11:10 p.m. UTC 
From: Brijesh Singh <brijesh.singh@amd.com>

The #NPT error code is a 64-bit value but the trace prints only the
lower 32-bits. Some of the fault error code (e.g PFERR_GUEST_FINAL_MASK)
are available in the upper 32-bits.

Cc: <stable@kernel.org>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
 arch/x86/kvm/trace.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

Vlastimil Babka July 25, 2022, 11:19 a.m. UTC | #1 
On 6/21/22 01:10, Ashish Kalra wrote:
> From: Brijesh Singh <brijesh.singh@amd.com>
> 
> The #NPT error code is a 64-bit value but the trace prints only the
> lower 32-bits. Some of the fault error code (e.g PFERR_GUEST_FINAL_MASK)
> are available in the upper 32-bits.
> 
> Cc: <stable@kernel.org>

Why stable?

> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
> ---
>  arch/x86/kvm/trace.h | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
> index e3a24b8f04be..9b9bc5468103 100644
> --- a/arch/x86/kvm/trace.h
> +++ b/arch/x86/kvm/trace.h
> @@ -383,12 +383,12 @@ TRACE_EVENT(kvm_inj_exception,
>   * Tracepoint for page fault.
>   */
>  TRACE_EVENT(kvm_page_fault,
> -	TP_PROTO(unsigned long fault_address, unsigned int error_code),
> +	TP_PROTO(unsigned long fault_address, u64 error_code),
>  	TP_ARGS(fault_address, error_code),
>  
>  	TP_STRUCT__entry(
>  		__field(	unsigned long,	fault_address	)
> -		__field(	unsigned int,	error_code	)
> +		__field(	u64,		error_code	)
>  	),
>  
>  	TP_fast_assign(
> @@ -396,7 +396,7 @@ TRACE_EVENT(kvm_page_fault,
>  		__entry->error_code	= error_code;
>  	),
>  
> -	TP_printk("address %lx error_code %x",
> +	TP_printk("address %lx error_code %llx",
>  		  __entry->fault_address, __entry->error_code)
>  );
>
diff mbox series

Patch

diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index e3a24b8f04be..9b9bc5468103 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -383,12 +383,12 @@  TRACE_EVENT(kvm_inj_exception,
  * Tracepoint for page fault.
  */
 TRACE_EVENT(kvm_page_fault,
-	TP_PROTO(unsigned long fault_address, unsigned int error_code),
+	TP_PROTO(unsigned long fault_address, u64 error_code),
 	TP_ARGS(fault_address, error_code),
 
 	TP_STRUCT__entry(
 		__field(	unsigned long,	fault_address	)
-		__field(	unsigned int,	error_code	)
+		__field(	u64,		error_code	)
 	),
 
 	TP_fast_assign(
@@ -396,7 +396,7 @@  TRACE_EVENT(kvm_page_fault,
 		__entry->error_code	= error_code;
 	),
 
-	TP_printk("address %lx error_code %x",
+	TP_printk("address %lx error_code %llx",
 		  __entry->fault_address, __entry->error_code)
 );