Re: [PATCH v7 12/17] PCI: Revoke mappings like devmem

2021-02-04 Thread Daniel Vetter
On Wed, Feb 3, 2021 at 5:14 PM Daniel Vetter wrote: > > On Tue, Jan 19, 2021 at 5:03 PM Daniel Vetter wrote: > > > > On Tue, Jan 19, 2021 at 4:20 PM Greg Kroah-Hartman > > wrote: > > > > > > On Tue, Jan 19, 2021 at 03:34:47PM +0100, Daniel Vetter wrote: > > > > On Tue, Jan 19, 2021 at 3:32 PM Gr

Re: [PATCH v7 12/17] PCI: Revoke mappings like devmem

2021-02-03 Thread Daniel Vetter
On Tue, Jan 19, 2021 at 5:03 PM Daniel Vetter wrote: > > On Tue, Jan 19, 2021 at 4:20 PM Greg Kroah-Hartman > wrote: > > > > On Tue, Jan 19, 2021 at 03:34:47PM +0100, Daniel Vetter wrote: > > > On Tue, Jan 19, 2021 at 3:32 PM Greg Kroah-Hartman > > > wrote: > > > > > > > > On Tue, Jan 19, 2021 a

Re: [PATCH v7 12/17] PCI: Revoke mappings like devmem

2021-01-19 Thread Daniel Vetter
On Tue, Jan 19, 2021 at 4:20 PM Greg Kroah-Hartman wrote: > > On Tue, Jan 19, 2021 at 03:34:47PM +0100, Daniel Vetter wrote: > > On Tue, Jan 19, 2021 at 3:32 PM Greg Kroah-Hartman > > wrote: > > > > > > On Tue, Jan 19, 2021 at 09:17:55AM +0100, Daniel Vetter wrote: > > > > On Fri, Nov 27, 2020 at

Re: [PATCH v7 12/17] PCI: Revoke mappings like devmem

2021-01-19 Thread Greg Kroah-Hartman
On Tue, Jan 19, 2021 at 03:34:47PM +0100, Daniel Vetter wrote: > On Tue, Jan 19, 2021 at 3:32 PM Greg Kroah-Hartman > wrote: > > > > On Tue, Jan 19, 2021 at 09:17:55AM +0100, Daniel Vetter wrote: > > > On Fri, Nov 27, 2020 at 5:42 PM Daniel Vetter > > > wrote: > > > > > > > > Since 3234ac664a87

Re: [PATCH v7 12/17] PCI: Revoke mappings like devmem

2021-01-19 Thread Daniel Vetter
On Tue, Jan 19, 2021 at 3:32 PM Greg Kroah-Hartman wrote: > > On Tue, Jan 19, 2021 at 09:17:55AM +0100, Daniel Vetter wrote: > > On Fri, Nov 27, 2020 at 5:42 PM Daniel Vetter > > wrote: > > > > > > Since 3234ac664a87 ("/dev/mem: Revoke mappings when a driver claims > > > the region") /dev/kmem z

Re: [PATCH v7 12/17] PCI: Revoke mappings like devmem

2021-01-19 Thread Greg Kroah-Hartman
On Tue, Jan 19, 2021 at 09:17:55AM +0100, Daniel Vetter wrote: > On Fri, Nov 27, 2020 at 5:42 PM Daniel Vetter wrote: > > > > Since 3234ac664a87 ("/dev/mem: Revoke mappings when a driver claims > > the region") /dev/kmem zaps ptes when the kernel requests exclusive > > acccess to an iomem region.

Re: [PATCH v7 12/17] PCI: Revoke mappings like devmem

2021-01-19 Thread Daniel Vetter
On Fri, Nov 27, 2020 at 5:42 PM Daniel Vetter wrote: > > Since 3234ac664a87 ("/dev/mem: Revoke mappings when a driver claims > the region") /dev/kmem zaps ptes when the kernel requests exclusive > acccess to an iomem region. And with CONFIG_IO_STRICT_DEVMEM, this is > the default for all driver us

[PATCH v7 12/17] PCI: Revoke mappings like devmem

2020-11-27 Thread Daniel Vetter
Since 3234ac664a87 ("/dev/mem: Revoke mappings when a driver claims the region") /dev/kmem zaps ptes when the kernel requests exclusive acccess to an iomem region. And with CONFIG_IO_STRICT_DEVMEM, this is the default for all driver uses. Except there's two more ways to access PCI BARs: sysfs and