search for: index_of_write

...> Now let's say the driver wants to do the same except for one page in the range for > which it wants to have write permission. Now driver set:: > > - range->default_flags = (1 << 63); > - range->pfn_flags_mask = (1 << 62); > - range->pfns[index_of_write] = (1 << 62); > + range->default_flags = HMM_PFN_REQ_FAULT; > + range->pfn_flags_mask = HMM_PFN_REQ_WRITE; > + range->pfns[index_of_write] = HMM_PFN_REQ_WRITE; All these choices for _WRITE behavior make it slightly confusing. I mean, it's better than it was, b...

...ge with at least read permission. Now let's say the driver wants to do the same except for one page in the range for which it wants to have write permission. Now driver set:: - range->default_flags = (1 << 63); - range->pfn_flags_mask = (1 << 62); - range->pfns[index_of_write] = (1 << 62); + range->default_flags = HMM_PFN_REQ_VALID; + range->pfn_flags_mask = HMM_PFN_REQ_WRITE; + range->pfns[index_of_write] = HMM_PFN_REQ_WRITE; With this, HMM will fault in all pages with at least read (i.e., valid) and for the address == range->start + (ind...

...ge with at least read permission. Now let's say the driver wants to do the same except for one page in the range for which it wants to have write permission. Now driver set:: - range->default_flags = (1 << 63); - range->pfn_flags_mask = (1 << 62); - range->pfns[index_of_write] = (1 << 62); + range->default_flags = HMM_PFN_REQ_FAULT; + range->pfn_flags_mask = HMM_PFN_REQ_WRITE; + range->pfns[index_of_write] = HMM_PFN_REQ_WRITE; With this, HMM will fault in all pages with at least read (i.e., valid) and for the address == range->start + (ind...

...on. > Now let's say the driver wants to do the same except for one page in the range for > which it wants to have write permission. Now driver set:: > > - range->default_flags = (1 << 63); > - range->pfn_flags_mask = (1 << 62); > - range->pfns[index_of_write] = (1 << 62); > + range->default_flags = HMM_PFN_REQ_VALID; HMM_PFN_REQ_FAULT Regards, ? Felix > + range->pfn_flags_mask = HMM_PFN_REQ_WRITE; > + range->pfns[index_of_write] = HMM_PFN_REQ_WRITE; > > With this, HMM will fault in all pages with at least r...

From: Jason Gunthorpe <jgg at mellanox.com> The API is a bit complicated for the uses we actually have, and disucssions for simplifying have come up a number of times. This small series removes the customizable pfn format and simplifies the return code of hmm_range_fault() All the drivers are adjusted to process in the simplified format. I would appreciated tested-by's for the two

From: Jason Gunthorpe <jgg at mellanox.com> The API is a bit complicated for the uses we actually have, and disucssions for simplifying have come up a number of times. This small series removes the customizable pfn format and simplifies the return code of hmm_range_fault() All the drivers are adjusted to process in the simplified format. I would appreciated tested-by's for the two

Hi Dan, Jérôme and Jason, below is a series that cleans up the dev_pagemap interface so that it is more easily usable, which removes the need to wrap it in hmm and thus allowing to kill a lot of code Note: this series is on top of Linux 5.2-rc6 and has some minor conflicts with the hmm tree that are easy to resolve. Diffstat summary: 34 files changed, 379 insertions(+), 1016 deletions(-) Git