Displaying 20 results from an estimated 43 matches for "airq_area".
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airq_areas
2019 Jul 23
3
[PATCH 1/1] virtio/s390: fix race on airq_areas
The access to airq_areas was racy ever since the adapter interrupts got
introduced to virtio-ccw, but since commit 39c7dcb15892 ("virtio/s390:
make airq summary indicators DMA") this became an issue in practice as
well. Namely before that commit the airq_info that got overwritten was
still functional. After that...
2019 Jul 23
3
[PATCH 1/1] virtio/s390: fix race on airq_areas
The access to airq_areas was racy ever since the adapter interrupts got
introduced to virtio-ccw, but since commit 39c7dcb15892 ("virtio/s390:
make airq summary indicators DMA") this became an issue in practice as
well. Namely before that commit the airq_info that got overwritten was
still functional. After that...
2019 Jul 24
2
[PATCH 1/1] virtio/s390: fix race on airq_areas
On Wed, 24 Jul 2019 08:44:19 +0200
Christian Borntraeger <borntraeger at de.ibm.com> wrote:
> On 24.07.19 00:58, Halil Pasic wrote:
> > The access to airq_areas was racy ever since the adapter interrupts got
> > introduced to virtio-ccw, but since commit 39c7dcb15892 ("virtio/s390:
> > make airq summary indicators DMA") this became an issue in practice as
> > well. Namely before that commit the airq_info that got overwritten wa...
2019 Jul 24
2
[PATCH 1/1] virtio/s390: fix race on airq_areas
On Wed, 24 Jul 2019 08:44:19 +0200
Christian Borntraeger <borntraeger at de.ibm.com> wrote:
> On 24.07.19 00:58, Halil Pasic wrote:
> > The access to airq_areas was racy ever since the adapter interrupts got
> > introduced to virtio-ccw, but since commit 39c7dcb15892 ("virtio/s390:
> > make airq summary indicators DMA") this became an issue in practice as
> > well. Namely before that commit the airq_info that got overwritten wa...
2019 Jul 24
0
[PATCH 1/1] virtio/s390: fix race on airq_areas
On 24.07.19 00:58, Halil Pasic wrote:
> The access to airq_areas was racy ever since the adapter interrupts got
> introduced to virtio-ccw, but since commit 39c7dcb15892 ("virtio/s390:
> make airq summary indicators DMA") this became an issue in practice as
> well. Namely before that commit the airq_info that got overwritten was
> still fu...
2019 Sep 03
0
[PATCH AUTOSEL 5.2 18/23] virtio/s390: fix race on airq_areas
From: Halil Pasic <pasic at linux.ibm.com>
[ Upstream commit 4f419eb14272e0698e8c55bb5f3f266cc2a21c81 ]
The access to airq_areas was racy ever since the adapter interrupts got
introduced to virtio-ccw, but since commit 39c7dcb15892 ("virtio/s390:
make airq summary indicators DMA") this became an issue in practice as
well. Namely before that commit the airq_info that got overwritten was
still functional. After that...
2019 Sep 03
0
[PATCH AUTOSEL 4.19 162/167] virtio/s390: fix race on airq_areas
From: Halil Pasic <pasic at linux.ibm.com>
[ Upstream commit 4f419eb14272e0698e8c55bb5f3f266cc2a21c81 ]
The access to airq_areas was racy ever since the adapter interrupts got
introduced to virtio-ccw, but since commit 39c7dcb15892 ("virtio/s390:
make airq summary indicators DMA") this became an issue in practice as
well. Namely before that commit the airq_info that got overwritten was
still functional. After that...
2019 Jul 24
0
[PATCH 1/1] virtio/s390: fix race on airq_areas
On 24.07.19 10:34, Cornelia Huck wrote:
> On Wed, 24 Jul 2019 08:44:19 +0200
> Christian Borntraeger <borntraeger at de.ibm.com> wrote:
>
>> On 24.07.19 00:58, Halil Pasic wrote:
>>> The access to airq_areas was racy ever since the adapter interrupts got
>>> introduced to virtio-ccw, but since commit 39c7dcb15892 ("virtio/s390:
>>> make airq summary indicators DMA") this became an issue in practice as
>>> well. Namely before that commit the airq_info that got overw...
2019 May 08
2
[PATCH 10/10] virtio/s390: make airq summary indicators DMA
.../virtio_ccw.c
> @@ -140,11 +140,17 @@ static int virtio_ccw_use_airq = 1;
>
> struct airq_info {
> rwlock_t lock;
> - u8 summary_indicator;
> + u8 summary_indicator_idx;
> struct airq_struct airq;
> struct airq_iv *aiv;
> };
> static struct airq_info *airq_areas[MAX_AIRQ_AREAS];
> +static u8 *summary_indicators;
> +
> +static inline u8 *get_summary_indicator(struct airq_info *info)
> +{
> + return summary_indicators + info->summary_indicator_idx;
> +}
>
> #define CCW_CMD_SET_VQ 0x13
> #define CCW_CMD_VDEV_RESET 0x33
&g...
2019 May 08
2
[PATCH 10/10] virtio/s390: make airq summary indicators DMA
.../virtio_ccw.c
> @@ -140,11 +140,17 @@ static int virtio_ccw_use_airq = 1;
>
> struct airq_info {
> rwlock_t lock;
> - u8 summary_indicator;
> + u8 summary_indicator_idx;
> struct airq_struct airq;
> struct airq_iv *aiv;
> };
> static struct airq_info *airq_areas[MAX_AIRQ_AREAS];
> +static u8 *summary_indicators;
> +
> +static inline u8 *get_summary_indicator(struct airq_info *info)
> +{
> + return summary_indicators + info->summary_indicator_idx;
> +}
>
> #define CCW_CMD_SET_VQ 0x13
> #define CCW_CMD_VDEV_RESET 0x33
&g...
2019 May 13
3
[PATCH 10/10] virtio/s390: make airq summary indicators DMA
...24 +++++++++++++++++-------
> 1 file changed, 17 insertions(+), 7 deletions(-)
(...)
> @@ -237,7 +243,8 @@ static void virtio_airq_handler(struct airq_struct *airq)
> read_unlock(&info->lock);
> }
>
> -static struct airq_info *new_airq_info(void)
> +/* call with airq_areas_lock held */
Hm, where is airq_areas_lock defined? If it was introduced in one of
the previous patches, I have missed it.
> +static struct airq_info *new_airq_info(int index)
> {
> struct airq_info *info;
> int rc;
2019 May 13
3
[PATCH 10/10] virtio/s390: make airq summary indicators DMA
...24 +++++++++++++++++-------
> 1 file changed, 17 insertions(+), 7 deletions(-)
(...)
> @@ -237,7 +243,8 @@ static void virtio_airq_handler(struct airq_struct *airq)
> read_unlock(&info->lock);
> }
>
> -static struct airq_info *new_airq_info(void)
> +/* call with airq_areas_lock held */
Hm, where is airq_areas_lock defined? If it was introduced in one of
the previous patches, I have missed it.
> +static struct airq_info *new_airq_info(int index)
> {
> struct airq_info *info;
> int rc;
2019 Apr 26
0
[PATCH 10/10] virtio/s390: make airq summary indicators DMA
...rivers/s390/virtio/virtio_ccw.c
+++ b/drivers/s390/virtio/virtio_ccw.c
@@ -140,11 +140,17 @@ static int virtio_ccw_use_airq = 1;
struct airq_info {
rwlock_t lock;
- u8 summary_indicator;
+ u8 summary_indicator_idx;
struct airq_struct airq;
struct airq_iv *aiv;
};
static struct airq_info *airq_areas[MAX_AIRQ_AREAS];
+static u8 *summary_indicators;
+
+static inline u8 *get_summary_indicator(struct airq_info *info)
+{
+ return summary_indicators + info->summary_indicator_idx;
+}
#define CCW_CMD_SET_VQ 0x13
#define CCW_CMD_VDEV_RESET 0x33
@@ -225,7 +231,7 @@ static void virtio_airq_handle...
2019 May 23
0
[PATCH v2 8/8] virtio/s390: make airq summary indicators DMA
...rivers/s390/virtio/virtio_ccw.c
+++ b/drivers/s390/virtio/virtio_ccw.c
@@ -140,11 +140,17 @@ static int virtio_ccw_use_airq = 1;
struct airq_info {
rwlock_t lock;
- u8 summary_indicator;
+ u8 summary_indicator_idx;
struct airq_struct airq;
struct airq_iv *aiv;
};
static struct airq_info *airq_areas[MAX_AIRQ_AREAS];
+static u8 *summary_indicators;
+
+static inline u8 *get_summary_indicator(struct airq_info *info)
+{
+ return summary_indicators + info->summary_indicator_idx;
+}
#define CCW_CMD_SET_VQ 0x13
#define CCW_CMD_VDEV_RESET 0x33
@@ -225,7 +231,7 @@ static void virtio_airq_handle...
2019 May 29
0
[PATCH v3 8/8] virtio/s390: make airq summary indicators DMA
...rivers/s390/virtio/virtio_ccw.c
+++ b/drivers/s390/virtio/virtio_ccw.c
@@ -140,11 +140,17 @@ static int virtio_ccw_use_airq = 1;
struct airq_info {
rwlock_t lock;
- u8 summary_indicator;
+ u8 summary_indicator_idx;
struct airq_struct airq;
struct airq_iv *aiv;
};
static struct airq_info *airq_areas[MAX_AIRQ_AREAS];
+static u8 *summary_indicators;
+
+static inline u8 *get_summary_indicator(struct airq_info *info)
+{
+ return summary_indicators + info->summary_indicator_idx;
+}
#define CCW_CMD_SET_VQ 0x13
#define CCW_CMD_VDEV_RESET 0x33
@@ -225,7 +231,7 @@ static void virtio_airq_handle...
2019 Jun 06
0
[PATCH v4 8/8] virtio/s390: make airq summary indicators DMA
...rivers/s390/virtio/virtio_ccw.c
+++ b/drivers/s390/virtio/virtio_ccw.c
@@ -140,11 +140,17 @@ static int virtio_ccw_use_airq = 1;
struct airq_info {
rwlock_t lock;
- u8 summary_indicator;
+ u8 summary_indicator_idx;
struct airq_struct airq;
struct airq_iv *aiv;
};
static struct airq_info *airq_areas[MAX_AIRQ_AREAS];
+static u8 *summary_indicators;
+
+static inline u8 *get_summary_indicator(struct airq_info *info)
+{
+ return summary_indicators + info->summary_indicator_idx;
+}
#define CCW_CMD_SET_VQ 0x13
#define CCW_CMD_VDEV_RESET 0x33
@@ -209,7 +215,7 @@ static void virtio_airq_handle...
2019 Jun 12
0
[PATCH v5 8/8] virtio/s390: make airq summary indicators DMA
...rivers/s390/virtio/virtio_ccw.c
+++ b/drivers/s390/virtio/virtio_ccw.c
@@ -140,11 +140,17 @@ static int virtio_ccw_use_airq = 1;
struct airq_info {
rwlock_t lock;
- u8 summary_indicator;
+ u8 summary_indicator_idx;
struct airq_struct airq;
struct airq_iv *aiv;
};
static struct airq_info *airq_areas[MAX_AIRQ_AREAS];
+static u8 *summary_indicators;
+
+static inline u8 *get_summary_indicator(struct airq_info *info)
+{
+ return summary_indicators + info->summary_indicator_idx;
+}
#define CCW_CMD_SET_VQ 0x13
#define CCW_CMD_VDEV_RESET 0x33
@@ -209,7 +215,7 @@ static void virtio_airq_handle...
2019 May 15
0
[PATCH 10/10] virtio/s390: make airq summary indicators DMA
...@ static int virtio_ccw_use_airq = 1;
>> ? struct airq_info {
>> ????? rwlock_t lock;
>> -??? u8 summary_indicator;
>> +??? u8 summary_indicator_idx;
>> ????? struct airq_struct airq;
>> ????? struct airq_iv *aiv;
>> ? };
>> ? static struct airq_info *airq_areas[MAX_AIRQ_AREAS];
>> +static u8 *summary_indicators;
>> +
>> +static inline u8 *get_summary_indicator(struct airq_info *info)
>> +{
>> +??? return summary_indicators + info->summary_indicator_idx;
>> +}
>> ? #define CCW_CMD_SET_VQ 0x13
>> ? #define...
2019 May 15
0
[PATCH 10/10] virtio/s390: make airq summary indicators DMA
...void virtio_airq_handler(struct airq_struct *airq)
> >> read_unlock(&info->lock);
> >> }
> >>
> >> -static struct airq_info *new_airq_info(void)
> >> +/* call with drivers/s390/virtio/virtio_ccw.cheld */
> >
> > Hm, where is airq_areas_lock defined? If it was introduced in one of
> > the previous patches, I have missed it.
>
> There is no airq_areas_lock defined currently. My assumption is that
> this will be used in context with the likely race condition this
> part of the patch is talking about.
>
>...
2019 May 15
0
[PATCH 10/10] virtio/s390: make airq summary indicators DMA
...>> @@ -237,7 +243,8 @@ static void virtio_airq_handler(struct airq_struct *airq)
>> read_unlock(&info->lock);
>> }
>>
>> -static struct airq_info *new_airq_info(void)
>> +/* call with drivers/s390/virtio/virtio_ccw.cheld */
>
> Hm, where is airq_areas_lock defined? If it was introduced in one of
> the previous patches, I have missed it.
There is no airq_areas_lock defined currently. My assumption is that
this will be used in context with the likely race condition this
part of the patch is talking about.
@@ -273,8 +281,9 @@ static unsigned...