search for: pa_section_shift

...unmet direct dependencies detected for DEVICE_PRIVATE Depends on [n]: ZONE_DEVICE [=n] Selected by [y]: - DRM_NOUVEAU_SVM [=y] && HAS_IOMEM [=y] && DRM_NOUVEAU [=y] && MMU [=y] && STAGING [=y] kernel/resource.c:1653:28: error: use of undeclared identifier 'PA_SECTION_SHIFT' size = ALIGN(size, 1UL << PA_SECTION_SHIFT); ^ kernel/resource.c:1654:48: error: use of undeclared identifier 'MAX_PHYSMEM_BITS' Add a dependency for Nouveau to avoid broken randconfig builds. Fixes: d2c63df2242e ("mm/hmm: make CON...

..., from ./include/linux/mmdebug.h:5, from ./include/linux/gfp.h:5, from ./include/linux/slab.h:15, from kernel/resource.c:17: kernel/resource.c: In function '__request_free_mem_region': kernel/resource.c:1653:28: error: 'PA_SECTION_SHIFT' undeclared (first use in this function); did you mean 'SECTION_SHIFT'? size = ALIGN(size, 1UL << PA_SECTION_SHIFT); ^~~~~~~~~~~~~~~~ ./include/uapi/linux/kernel.h:11:47: note: in definition of macro '__ALIGN_KERNEL_MASK' #define __ALIGN_KERN...

...VICE_PRIVATE in that driver, allowing users to avoid enabling this if > they don't want the overhead. > I'm not too sure what's going on here, but i386 allmodconfig broke. kernel/resource.c: In function '__request_free_mem_region': kernel/resource.c:1653:28: error: 'PA_SECTION_SHIFT' undeclared (first use in this function); did you mean 'SECTIONS_PGSHIFT'? size = ALIGN(size, 1UL << PA_SECTION_SHIFT); because in current mainline, allmodconfig produces CONFIG_DEVICE_PRIVATE=n but in current linux-next, allmodconfig produces CONFIG_DEVICE_PRIVATE=y. But CONF...

...t can later be hotpluged as ZONE_DEVICE + * memory, which in turn allocates struct pages. + */ +struct resource *devm_request_free_mem_region(struct device *dev, + struct resource *base, unsigned long size) +{ + resource_size_t end, addr; + struct resource *res; + + size = ALIGN(size, 1UL << PA_SECTION_SHIFT); + end = min_t(unsigned long, base->end, (1UL << MAX_PHYSMEM_BITS) - 1); + addr = end - size + 1UL; + + for (; addr > size && addr >= base->start; addr -= size) { + if (region_intersects(addr, size, 0, IORES_DESC_NONE) != + REGION_DISJOINT) + continue; + + res = de...

...can later be hotplugged as ZONE_DEVICE + * memory, which in turn allocates struct pages. + */ +struct resource *devm_request_free_mem_region(struct device *dev, + struct resource *base, unsigned long size) +{ + resource_size_t end, addr; + struct resource *res; + + size = ALIGN(size, 1UL << PA_SECTION_SHIFT); + end = min_t(unsigned long, base->end, (1UL << MAX_PHYSMEM_BITS) - 1); + addr = end - size + 1UL; + + for (; addr > size && addr >= base->start; addr -= size) { + if (region_intersects(addr, size, 0, IORES_DESC_NONE) != + REGION_DISJOINT) + continue; + + res = de...

...+ * memory, which in turn allocates struct pages. > + */ > +struct resource *devm_request_free_mem_region(struct device *dev, > + struct resource *base, unsigned long size) > +{ > + resource_size_t end, addr; > + struct resource *res; > + > + size = ALIGN(size, 1UL << PA_SECTION_SHIFT); > + end = min_t(unsigned long, base->end, (1UL << MAX_PHYSMEM_BITS) - 1); > + addr = end - size + 1UL; > + > + for (; addr > size && addr >= base->start; addr -= size) { > + if (region_intersects(addr, size, 0, IORES_DESC_NONE) != > + REGION_DISJOIN...

...e bool put_devmap_managed_page(struct page *page) { return false; diff --git a/kernel/memremap.c b/kernel/memremap.c index 94b830b6eca5..6a3183cac764 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -17,6 +17,37 @@ static DEFINE_XARRAY(pgmap_array); #define SECTION_MASK ~((1UL << PA_SECTION_SHIFT) - 1) #define SECTION_SIZE (1UL << PA_SECTION_SHIFT) +#ifdef CONFIG_DEV_PAGEMAP_OPS +DEFINE_STATIC_KEY_FALSE(devmap_managed_key); +EXPORT_SYMBOL(devmap_managed_key); +static atomic_t devmap_enable; + +static void dev_pagemap_put_ops(void *data) +{ + if (atomic_dec_and_test(&devmap_enab...

...e bool put_devmap_managed_page(struct page *page) { return false; diff --git a/kernel/memremap.c b/kernel/memremap.c index ba7156bd52d1..7272027fbdd7 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -17,6 +17,35 @@ static DEFINE_XARRAY(pgmap_array); #define SECTION_MASK ~((1UL << PA_SECTION_SHIFT) - 1) #define SECTION_SIZE (1UL << PA_SECTION_SHIFT) +#ifdef CONFIG_DEV_PAGEMAP_OPS +DEFINE_STATIC_KEY_FALSE(devmap_managed_key); +EXPORT_SYMBOL(devmap_managed_key); +static atomic_t devmap_enable; + +static void dev_pagemap_put_ops(void *data) +{ + if (atomic_dec_and_test(&devmap_enab...

...e bool put_devmap_managed_page(struct page *page) { return false; diff --git a/kernel/memremap.c b/kernel/memremap.c index 00c1ceb60c19..3219a4c91d07 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -17,6 +17,35 @@ static DEFINE_XARRAY(pgmap_array); #define SECTION_MASK ~((1UL << PA_SECTION_SHIFT) - 1) #define SECTION_SIZE (1UL << PA_SECTION_SHIFT) +#ifdef CONFIG_DEV_PAGEMAP_OPS +DEFINE_STATIC_KEY_FALSE(devmap_managed_key); +EXPORT_SYMBOL(devmap_managed_key); +static atomic_t devmap_managed_enable; + +static void devmap_managed_enable_put(void *data) +{ + if (atomic_dec_and_test(&a...

...ge *page) > { > return false; > diff --git a/kernel/memremap.c b/kernel/memremap.c > index 00c1ceb60c19..3219a4c91d07 100644 > --- a/kernel/memremap.c > +++ b/kernel/memremap.c > @@ -17,6 +17,35 @@ static DEFINE_XARRAY(pgmap_array); > #define SECTION_MASK ~((1UL << PA_SECTION_SHIFT) - 1) > #define SECTION_SIZE (1UL << PA_SECTION_SHIFT) > > +#ifdef CONFIG_DEV_PAGEMAP_OPS > +DEFINE_STATIC_KEY_FALSE(devmap_managed_key); > +EXPORT_SYMBOL(devmap_managed_key); > +static atomic_t devmap_managed_enable; > + > +static void devmap_managed_enable_put(voi...

...+ * memory, which in turn allocates struct pages. > + */ > +struct resource *devm_request_free_mem_region(struct device *dev, > + struct resource *base, unsigned long size) > +{ > + resource_size_t end, addr; > + struct resource *res; > + > + size = ALIGN(size, 1UL << PA_SECTION_SHIFT); > + end = min_t(unsigned long, base->end, (1UL << MAX_PHYSMEM_BITS) - 1); Even fixed it to use min_t > + addr = end - size + 1UL; > + for (; addr > size && addr >= base->start; addr -= size) { > + if (region_intersects(addr, size, 0, IORES_DESC_NONE) != &g...

...cac764..7167e717647d 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -11,7 +11,6 @@ #include <linux/types.h> #include <linux/wait_bit.h> #include <linux/xarray.h> -#include <linux/hmm.h> static DEFINE_XARRAY(pgmap_array); #define SECTION_MASK ~((1UL << PA_SECTION_SHIFT) - 1) @@ -48,36 +47,6 @@ static inline int dev_pagemap_enable(struct device *dev) } #endif /* CONFIG_DEV_PAGEMAP_OPS */ -#if IS_ENABLED(CONFIG_DEVICE_PRIVATE) -vm_fault_t device_private_entry_fault(struct vm_area_struct *vma, - unsigned long addr, - swp_entry_t entry, -...

...c91d07..c06a5487dda7 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -11,7 +11,6 @@ #include <linux/types.h> #include <linux/wait_bit.h> #include <linux/xarray.h> -#include <linux/hmm.h> static DEFINE_XARRAY(pgmap_array); #define SECTION_MASK ~((1UL << PA_SECTION_SHIFT) - 1) @@ -46,36 +45,6 @@ static int devmap_managed_enable_get(struct device *dev, struct dev_pagemap *pgm } #endif /* CONFIG_DEV_PAGEMAP_OPS */ -#if IS_ENABLED(CONFIG_DEVICE_PRIVATE) -vm_fault_t device_private_entry_fault(struct vm_area_struct *vma, - unsigned long addr, - swp_e...

...> +++ b/kernel/memremap.c > @@ -11,7 +11,6 @@ > #include <linux/types.h> > #include <linux/wait_bit.h> > #include <linux/xarray.h> > -#include <linux/hmm.h> > > static DEFINE_XARRAY(pgmap_array); > #define SECTION_MASK ~((1UL << PA_SECTION_SHIFT) - 1) > @@ -48,36 +47,6 @@ static inline int dev_pagemap_enable(struct device *dev) > } > #endif /* CONFIG_DEV_PAGEMAP_OPS */ > > -#if IS_ENABLED(CONFIG_DEVICE_PRIVATE) > -vm_fault_t device_private_entry_fault(struct vm_area_struct *vma, > - unsigned long addr, &...

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 Diffstat: 22 files changed, 245 insertions(+), 802 deletions(-) Git tree: git://git.infradead.org/users/hch/misc.git hmm-devmem-cleanup Gitweb:

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 the rdma/hmm branch + the dev_pagemap releas fix series from Dan that went into 5.2-rc5. Git tree: git://git.infradead.org/users/hch/misc.git

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-rc5 and has some minor conflicts with the hmm tree that are easy to resolve. Diffstat summary: 32 files changed, 361 insertions(+), 1012 deletions(-) Git

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