Re: [Qemu-devel] [PATCH v10 01/10] userfault: update kernel header for UFFD_FEATURE_*
On 09/20/2017 09:43 PM, Dr. David Alan Gilbert wrote:
* Alexey Perevalov (a.pereva...@samsung.com) wrote:
This commit adds modification for UFFD_FEATURE_SIGBUS and
UFFD_FEATURE_THREAD_ID.
Signed-off-by: Alexey Perevalov
This should be replaced with just running the
scripts/update-linux-headers.sh
against a 4.14-rc1 checkout.
That can be done as a separate patch or the first patch
of this series.
Ok, in case of separate patch it's reasonably to
send modification for all headers.
--
Best regards,
Alexey Perevalov
Dave
---
linux-headers/linux/userfaultfd.h | 16 +++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/linux-headers/linux/userfaultfd.h
b/linux-headers/linux/userfaultfd.h
index 9701772..b43cf0d 100644
--- a/linux-headers/linux/userfaultfd.h
+++ b/linux-headers/linux/userfaultfd.h
@@ -23,7 +23,9 @@
UFFD_FEATURE_EVENT_REMOVE | \
UFFD_FEATURE_EVENT_UNMAP | \
UFFD_FEATURE_MISSING_HUGETLBFS | \
- UFFD_FEATURE_MISSING_SHMEM)
+ UFFD_FEATURE_MISSING_SHMEM | \
+ UFFD_FEATURE_SIGBUS |\
+ UFFD_FEATURE_THREAD_ID)
#define UFFD_API_IOCTLS \
((__u64)1 << _UFFDIO_REGISTER | \
(__u64)1 << _UFFDIO_UNREGISTER | \
@@ -78,6 +80,9 @@ struct uffd_msg {
struct {
__u64 flags;
__u64 address;
+ union {
+ __u32 ptid;
+ } feat;
} pagefault;
struct {
@@ -153,6 +158,13 @@ struct uffdio_api {
* UFFD_FEATURE_MISSING_SHMEM works the same as
* UFFD_FEATURE_MISSING_HUGETLBFS, but it applies to shmem
* (i.e. tmpfs and other shmem based APIs).
+*
+* UFFD_FEATURE_SIGBUS feature means no page-fault
+* (UFFD_EVENT_PAGEFAULT) event will be delivered, instead
+* a SIGBUS signal will be sent to the faulting process.
+*
+* UFFD_FEATURE_THREAD_ID pid of the page faulted task_struct will
+* be returned, if feature is not requested 0 will be returned.
*/
#define UFFD_FEATURE_PAGEFAULT_FLAG_WP(1<<0)
#define UFFD_FEATURE_EVENT_FORK (1<<1)
@@ -161,6 +173,8 @@ struct uffdio_api {
#define UFFD_FEATURE_MISSING_HUGETLBFS(1<<4)
#define UFFD_FEATURE_MISSING_SHMEM(1<<5)
#define UFFD_FEATURE_EVENT_UNMAP (1<<6)
+#define UFFD_FEATURE_SIGBUS(1<<7)
+#define UFFD_FEATURE_THREAD_ID (1<<8)
__u64 features;
__u64 ioctls;
--
1.9.1
--
Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
Re: [Qemu-devel] [PATCH v10 01/10] userfault: update kernel header for UFFD_FEATURE_*
* Alexey Perevalov (a.pereva...@samsung.com) wrote:
> This commit adds modification for UFFD_FEATURE_SIGBUS and
> UFFD_FEATURE_THREAD_ID.
>
> Signed-off-by: Alexey Perevalov
This should be replaced with just running the
scripts/update-linux-headers.sh
against a 4.14-rc1 checkout.
That can be done as a separate patch or the first patch
of this series.
Dave
> ---
> linux-headers/linux/userfaultfd.h | 16 +++-
> 1 file changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/linux-headers/linux/userfaultfd.h
> b/linux-headers/linux/userfaultfd.h
> index 9701772..b43cf0d 100644
> --- a/linux-headers/linux/userfaultfd.h
> +++ b/linux-headers/linux/userfaultfd.h
> @@ -23,7 +23,9 @@
> UFFD_FEATURE_EVENT_REMOVE | \
> UFFD_FEATURE_EVENT_UNMAP | \
> UFFD_FEATURE_MISSING_HUGETLBFS | \
> -UFFD_FEATURE_MISSING_SHMEM)
> +UFFD_FEATURE_MISSING_SHMEM | \
> +UFFD_FEATURE_SIGBUS |\
> +UFFD_FEATURE_THREAD_ID)
> #define UFFD_API_IOCTLS \
> ((__u64)1 << _UFFDIO_REGISTER | \
>(__u64)1 << _UFFDIO_UNREGISTER | \
> @@ -78,6 +80,9 @@ struct uffd_msg {
> struct {
> __u64 flags;
> __u64 address;
> + union {
> + __u32 ptid;
> + } feat;
> } pagefault;
>
> struct {
> @@ -153,6 +158,13 @@ struct uffdio_api {
>* UFFD_FEATURE_MISSING_SHMEM works the same as
>* UFFD_FEATURE_MISSING_HUGETLBFS, but it applies to shmem
>* (i.e. tmpfs and other shmem based APIs).
> + *
> + * UFFD_FEATURE_SIGBUS feature means no page-fault
> + * (UFFD_EVENT_PAGEFAULT) event will be delivered, instead
> + * a SIGBUS signal will be sent to the faulting process.
> + *
> + * UFFD_FEATURE_THREAD_ID pid of the page faulted task_struct will
> + * be returned, if feature is not requested 0 will be returned.
>*/
> #define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1<<0)
> #define UFFD_FEATURE_EVENT_FORK (1<<1)
> @@ -161,6 +173,8 @@ struct uffdio_api {
> #define UFFD_FEATURE_MISSING_HUGETLBFS (1<<4)
> #define UFFD_FEATURE_MISSING_SHMEM (1<<5)
> #define UFFD_FEATURE_EVENT_UNMAP (1<<6)
> +#define UFFD_FEATURE_SIGBUS (1<<7)
> +#define UFFD_FEATURE_THREAD_ID (1<<8)
> __u64 features;
>
> __u64 ioctls;
> --
> 1.9.1
>
--
Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
[Qemu-devel] [PATCH v10 01/10] userfault: update kernel header for UFFD_FEATURE_*
This commit adds modification for UFFD_FEATURE_SIGBUS and
UFFD_FEATURE_THREAD_ID.
Signed-off-by: Alexey Perevalov
---
linux-headers/linux/userfaultfd.h | 16 +++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/linux-headers/linux/userfaultfd.h
b/linux-headers/linux/userfaultfd.h
index 9701772..b43cf0d 100644
--- a/linux-headers/linux/userfaultfd.h
+++ b/linux-headers/linux/userfaultfd.h
@@ -23,7 +23,9 @@
UFFD_FEATURE_EVENT_REMOVE | \
UFFD_FEATURE_EVENT_UNMAP | \
UFFD_FEATURE_MISSING_HUGETLBFS | \
- UFFD_FEATURE_MISSING_SHMEM)
+ UFFD_FEATURE_MISSING_SHMEM | \
+ UFFD_FEATURE_SIGBUS |\
+ UFFD_FEATURE_THREAD_ID)
#define UFFD_API_IOCTLS\
((__u64)1 << _UFFDIO_REGISTER | \
(__u64)1 << _UFFDIO_UNREGISTER | \
@@ -78,6 +80,9 @@ struct uffd_msg {
struct {
__u64 flags;
__u64 address;
+ union {
+ __u32 ptid;
+ } feat;
} pagefault;
struct {
@@ -153,6 +158,13 @@ struct uffdio_api {
* UFFD_FEATURE_MISSING_SHMEM works the same as
* UFFD_FEATURE_MISSING_HUGETLBFS, but it applies to shmem
* (i.e. tmpfs and other shmem based APIs).
+*
+* UFFD_FEATURE_SIGBUS feature means no page-fault
+* (UFFD_EVENT_PAGEFAULT) event will be delivered, instead
+* a SIGBUS signal will be sent to the faulting process.
+*
+* UFFD_FEATURE_THREAD_ID pid of the page faulted task_struct will
+* be returned, if feature is not requested 0 will be returned.
*/
#define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1<<0)
#define UFFD_FEATURE_EVENT_FORK(1<<1)
@@ -161,6 +173,8 @@ struct uffdio_api {
#define UFFD_FEATURE_MISSING_HUGETLBFS (1<<4)
#define UFFD_FEATURE_MISSING_SHMEM (1<<5)
#define UFFD_FEATURE_EVENT_UNMAP (1<<6)
+#define UFFD_FEATURE_SIGBUS(1<<7)
+#define UFFD_FEATURE_THREAD_ID (1<<8)
__u64 features;
__u64 ioctls;
--
1.9.1
