linux-kernel - Re: [PATCH 18/19] EDAC, ghes: Unify trace_mc_event() code with edac

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]

Date:   Fri, 11 Oct 2019 08:23:24 -0300
From:   Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
To:     Robert Richter <rrichter@...vell.com>
Cc:     Borislav Petkov <bp@...en8.de>, Tony Luck <tony.luck@...el.com>,
        James Morse <james.morse@....com>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 18/19] EDAC, ghes: Unify trace_mc_event() code with
 edac_mc driver

Em Thu, 10 Oct 2019 20:25:40 +0000
Robert Richter <rrichter@...vell.com> escreveu:

> The code in ghes_edac.c and edac_mc.c for grain_bits calculation and
> calling trace_mc_event() is now the same. Move it to a single location
> in edac_raw_mc_handle_error().
> 
> The only difference is the missing IS_ENABLED(CONFIG_RAS) switch, but
> this is needed for ghes too.
> 
> Signed-off-by: Robert Richter <rrichter@...vell.com>

Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>

> ---
>  drivers/edac/edac_mc.c   | 30 +++++++++++++++---------------
>  drivers/edac/ghes_edac.c | 13 -------------
>  2 files changed, 15 insertions(+), 28 deletions(-)
> 
> diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
> index 3779204c0e21..e6c6e40dc760 100644
> --- a/drivers/edac/edac_mc.c
> +++ b/drivers/edac/edac_mc.c
> @@ -1070,6 +1070,21 @@ void edac_raw_mc_handle_error(struct edac_raw_error_desc *e,
>  {
>  	struct mem_ctl_info *mci = error_desc_to_mci(e);
>  	char detail[80];
> +	u8 grain_bits;
> +
> +	/* Sanity-check driver-supplied grain value. */
> +	if (WARN_ON_ONCE(!e->grain))
> +		e->grain = 1;
> +
> +	grain_bits = fls_long(e->grain - 1);
> +
> +	/* Report the error via the trace interface */
> +	if (IS_ENABLED(CONFIG_RAS))
> +		trace_mc_event(e->type, e->msg, e->label, e->error_count,
> +			       mci->mc_idx, e->top_layer, e->mid_layer,
> +			       e->low_layer,
> +			       (e->page_frame_number << PAGE_SHIFT) | e->offset_in_page,
> +			       grain_bits, e->syndrome, e->other_detail);
>  
>  	/* Memory type dependent details about the error */
>  	if (e->type == HW_EVENT_ERR_CORRECTED) {
> @@ -1110,7 +1125,6 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
>  	int row = -1, chan = -1;
>  	int pos[EDAC_MAX_LAYERS] = { top_layer, mid_layer, low_layer };
>  	int i, n_labels = 0;
> -	u8 grain_bits;
>  	struct edac_raw_error_desc *e = &mci->error_desc;
>  	bool any_memory = true;
>  
> @@ -1242,20 +1256,6 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
>  	if (p > e->location)
>  		*(p - 1) = '\0';
>  
> -	/* Sanity-check driver-supplied grain value. */
> -	if (WARN_ON_ONCE(!e->grain))
> -		e->grain = 1;
> -
> -	grain_bits = fls_long(e->grain - 1);
> -
> -	/* Report the error via the trace interface */
> -	if (IS_ENABLED(CONFIG_RAS))
> -		trace_mc_event(type, e->msg, e->label, e->error_count,
> -			       mci->mc_idx, e->top_layer, e->mid_layer,
> -			       e->low_layer,
> -			       (e->page_frame_number << PAGE_SHIFT) | e->offset_in_page,
> -			       grain_bits, e->syndrome, e->other_detail);
> -
>  	dimm = edac_get_dimm(mci, top_layer, mid_layer, low_layer);
>  
>  	edac_raw_mc_handle_error(e, dimm);
> diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
> index 8d9d3c4dbebb..17d5b22fe000 100644
> --- a/drivers/edac/ghes_edac.c
> +++ b/drivers/edac/ghes_edac.c
> @@ -198,7 +198,6 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err)
>  	struct ghes_edac_pvt *pvt = ghes_pvt;
>  	unsigned long flags;
>  	char *p;
> -	u8 grain_bits;
>  
>  	if (!pvt)
>  		return;
> @@ -430,18 +429,6 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err)
>  	if (p > pvt->other_detail)
>  		*(p - 1) = '\0';
>  
> -	/* Sanity-check driver-supplied grain value. */
> -	if (WARN_ON_ONCE(!e->grain))
> -		e->grain = 1;
> -
> -	grain_bits = fls_long(e->grain - 1);
> -
> -	/* Generate the trace event */
> -	trace_mc_event(e->type, e->msg, e->label, e->error_count,
> -		       mci->mc_idx, e->top_layer, e->mid_layer, e->low_layer,
> -		       (e->page_frame_number << PAGE_SHIFT) | e->offset_in_page,
> -		       grain_bits, e->syndrome, e->other_detail);
> -
>  	dimm = edac_get_dimm_by_index(mci, e->top_layer);
>  
>  	edac_raw_mc_handle_error(e, dimm);



Thanks,
Mauro