SCM_READ/WRITE_MEATADATA hcall supports multibyte read/write. This patch
updates the metadata read/write to use 1, 2, 4 or 8 byte read/write as
mentioned in PAPR document.
READ/WRITE_METADATA hcall supports the 1, 2, 4, or 8 bytes read/write.
For other values hcall results H_P3.
Hypervisor stores
From: Christoph Hellwig
Date: Sat, 1 Jun 2019 09:49:43 +0200
> below is a series to switch mips, sh and sparc64 to use the generic
> GUP code so that we only have one codebase to touch for further
> improvements to this code. I don't have hardware for any of these
> architectures, and generally
Hello,
Thiago Jung Bauermann writes:
> This series enables Secure Virtual Machines (SVMs) on powerpc. SVMs use the
> Protected Execution Facility (PEF) and request to be migrated to secure
> memory during prom_init() so by default all of their memory is inaccessible
> to the hypervisor. There
Both sparc64 and sh had this pattern, but now that I look at it more
closely, I think your version is wrong, or at least nonoptimal.
On Sat, Jun 1, 2019 at 12:50 AM Christoph Hellwig wrote:
>
> +#define pgd_page(pgd) virt_to_page(__va(pgd_val(pgd)))
Going through the virtual add
On Sat, Jun 1, 2019 at 12:50 AM Christoph Hellwig wrote:
>
> Pass in the already calculated end value instead of recomputing it, and
> leave the end > start check in the callers instead of duplicating them
> in the arch code.
Good cleanup, except it's wrong.
> - if (nr_pages <= 0)
> +
From: Tyrel Datwyler
[ Upstream commit fb26228bfc4ce3951544848555c0278e2832e618 ]
The find_dlpar_node() helper returns a device node with its reference
incremented. Both the add and remove paths use this helper for find the
appropriate node, but fail to release the reference when done.
Annotat
From: Michael Ellerman
[ Upstream commit 2b8358a951b1e2a534a54924cd8245e58a1c5fb8 ]
The mpc85xx EDAC driver can be configured as a module but then fails to
build because it uses two unexported symbols:
ERROR: ".pci_find_hose_for_OF_device" [drivers/edac/mpc85xx_edac_mod.ko]
undefined!
ERRO
From: Michael Ellerman
[ Upstream commit 2b8358a951b1e2a534a54924cd8245e58a1c5fb8 ]
The mpc85xx EDAC driver can be configured as a module but then fails to
build because it uses two unexported symbols:
ERROR: ".pci_find_hose_for_OF_device" [drivers/edac/mpc85xx_edac_mod.ko]
undefined!
ERRO
From: Michael Ellerman
[ Upstream commit 2b8358a951b1e2a534a54924cd8245e58a1c5fb8 ]
The mpc85xx EDAC driver can be configured as a module but then fails to
build because it uses two unexported symbols:
ERROR: ".pci_find_hose_for_OF_device" [drivers/edac/mpc85xx_edac_mod.ko]
undefined!
ERRO
From: Michael Ellerman
[ Upstream commit 2b8358a951b1e2a534a54924cd8245e58a1c5fb8 ]
The mpc85xx EDAC driver can be configured as a module but then fails to
build because it uses two unexported symbols:
ERROR: ".pci_find_hose_for_OF_device" [drivers/edac/mpc85xx_edac_mod.ko]
undefined!
ERRO
All other get_user_page_fast cases mark the page referenced, so do
this here as well.
Signed-off-by: Christoph Hellwig
---
mm/gup.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/gup.c b/mm/gup.c
index 6090044227f1..d1fc008de292 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -2020,6 +2020,7 @@
This applies the overflow fixes from 8fde12ca79aff
("mm: prevent get_user_pages() from overflowing page refcount")
to the powerpc hugepd code and brings it back in sync with the
other GUP cases.
Signed-off-by: Christoph Hellwig
---
mm/gup.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
While only powerpc supports the hugepd case, the code is pretty
generic and I'd like to keep all GUP internals in one place.
Signed-off-by: Christoph Hellwig
---
arch/powerpc/Kconfig | 1 +
arch/powerpc/mm/hugetlbpage.c | 72 --
include/linux/hugetlb.h
We can only deal with FOLL_WRITE and/or FOLL_LONGTERM in
get_user_pages_fast, so reject all other flags.
Signed-off-by: Christoph Hellwig
---
mm/gup.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/mm/gup.c b/mm/gup.c
index c8da7764de9c..53b50c63ba51 100644
--- a/mm/gup.c
+++ b/mm/gup.c
Always build mm/gup.c, and move the nommu versions and replace the
separate stubs for various functions by the default ones, with the _fast
version always falling back to the slow path because gup_fast_permitted
always returns false now if HAVE_FAST_GUP is not set, and we use the
nommu version of _
We only support the generic GUP now, so rename the config option to
be more clear, and always use the mm/Kconfig definition of the
symbol and select it from the arch Kconfigs.
Signed-off-by: Christoph Hellwig
---
arch/arm/Kconfig | 5 +
arch/arm64/Kconfig | 4 +---
arch/mips/Kconfig
The sparc64 code is mostly equivalent to the generic one, minus various
bugfixes and two arch overrides that this patch adds to pgtable.h.
Signed-off-by: Christoph Hellwig
---
arch/sparc/Kconfig | 1 +
arch/sparc/include/asm/pgtable_64.h | 18 ++
arch/sparc/mm/Makefile
Add a helper to untag a user pointer. This is needed for ADI support
in get_user_pages_fast.
Signed-off-by: Christoph Hellwig
---
arch/sparc/include/asm/pgtable_64.h | 22 ++
1 file changed, 22 insertions(+)
diff --git a/arch/sparc/include/asm/pgtable_64.h
b/arch/sparc/inc
The split low/high access is the only non-READ_ONCE version of
gup_get_pte that did show up in the various arch implemenations.
Lift it to common code and drop the ifdef based arch override.
Signed-off-by: Christoph Hellwig
---
arch/x86/Kconfig | 1 +
arch/x86/include/asm/p
The sh code is mostly equivalent to the generic one, minus various
bugfixes and two arch overrides that this patch adds to pgtable.h.
Signed-off-by: Christoph Hellwig
---
arch/sh/Kconfig | 2 +
arch/sh/include/asm/pgtable.h | 37 +
arch/sh/mm/Makefile | 2 +-
arc
sparc64 only had pgd_page_vaddr, but not pgd_page.
Signed-off-by: Christoph Hellwig
---
arch/sparc/include/asm/pgtable_64.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/sparc/include/asm/pgtable_64.h
b/arch/sparc/include/asm/pgtable_64.h
index 22500c3be7a9..dcf970e82262 100644
--- a
The mips code is mostly equivalent to the generic one, minus various
bugfixes and an arch override for gup_fast_permitted.
Note that this defines ARCH_HAS_PTE_SPECIAL for mips as mips has
pte_special and pte_mkspecial implemented and used in the existing
gup code. They are no-op stubs, though whi
Pass in the already calculated end value instead of recomputing it, and
leave the end > start check in the callers instead of duplicating them
in the arch code.
Signed-off-by: Christoph Hellwig
---
arch/s390/include/asm/pgtable.h | 8 +---
arch/x86/include/asm/pgtable_64.h | 8 +---
sh only had pud_page_vaddr, but not pud_page.
Signed-off-by: Christoph Hellwig
---
arch/sh/include/asm/pgtable-3level.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/sh/include/asm/pgtable-3level.h
b/arch/sh/include/asm/pgtable-3level.h
index 7d8587eb65ff..8ff6fb6b4d19 100644
--- a/a
Hi Linus and maintainers,
below is a series to switch mips, sh and sparc64 to use the generic
GUP code so that we only have one codebase to touch for further
improvements to this code. I don't have hardware for any of these
architectures, and generally no clue about their page table
management, s
From: Andrey Konovalov
To allow arm64 syscalls to accept tagged pointers from userspace, we must
untag them when they are passed to the kernel. Since untagging is done in
generic parts of the kernel, the untagged_addr macro needs to be defined
for all architectures.
Define it as a noop for archi
This will allow sparc64 to override its ADI tags for
get_user_pages and get_user_pages_fast.
Signed-off-by: Christoph Hellwig
---
mm/gup.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/gup.c b/mm/gup.c
index f173fcbaf1b2..9775f7675653 100644
--- a/mm/gup.c
+++ b/mm/g
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