* Q: Kconfig option VIRT_TO_BUS @ 2012-11-12 16:18 H Hartley Sweeten 2012-11-12 18:40 ` Bjorn Helgaas 0 siblings, 1 reply; 14+ messages in thread From: H Hartley Sweeten @ 2012-11-12 16:18 UTC (permalink / raw) To: linux-kernel Hello all, Does anyone know what the Kconfig option VIRT_TO_BUS does? There are a number of "depends on" that option but it does not seem to directly enable any code in the kernel. Thanks for any reply. Regards, Hartley ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Q: Kconfig option VIRT_TO_BUS 2012-11-12 16:18 Q: Kconfig option VIRT_TO_BUS H Hartley Sweeten @ 2012-11-12 18:40 ` Bjorn Helgaas 2012-11-12 21:26 ` [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS Stephen Rothwell 2012-11-12 23:13 ` Q: Kconfig option VIRT_TO_BUS H Hartley Sweeten 0 siblings, 2 replies; 14+ messages in thread From: Bjorn Helgaas @ 2012-11-12 18:40 UTC (permalink / raw) To: H Hartley Sweeten; +Cc: linux-kernel, Stephen Rothwell On Mon, Nov 12, 2012 at 9:18 AM, H Hartley Sweeten <hartleys@visionengravers.com> wrote: > Hello all, > > Does anyone know what the Kconfig option VIRT_TO_BUS does? > There are a number of "depends on" that option but it does not > seem to directly enable any code in the kernel. virt_to_bus() is a deprecated interface for converting a kernel virtual address to a bus address. It's deprecated because it's impossible to implement correctly when there are multiple bus address spaces, because you don't know which bus address space the caller has in mind. See Documentation/DMA-API-HOWTO.txt and Documentation/bus-virt-phys-mapping.txt for more details about virt_to_bus() and its replacements (dma_map_*()). It looks like f057eac0d7ad967138390a9dd7fd8267e1e39d19 added CONFIG_VIRT_TO_BUS as a way to prevent drivers that use virt_to_bus() from being built on architectures that can't support virt_to_bus(). Architectures that can't implement virt_to_bus() set CONFIG_ARCH_NO_VIRT_TO_BUS. It looks like powerpc, sh, and sparc currently set it, but ia64, x86, and probably other arches should also set it. Bjorn ^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS 2012-11-12 18:40 ` Bjorn Helgaas @ 2012-11-12 21:26 ` Stephen Rothwell 2012-11-12 21:27 ` David Miller ` (4 more replies) 2012-11-12 23:13 ` Q: Kconfig option VIRT_TO_BUS H Hartley Sweeten 1 sibling, 5 replies; 14+ messages in thread From: Stephen Rothwell @ 2012-11-12 21:26 UTC (permalink / raw) To: Andrew Morton Cc: Bjorn Helgaas, H Hartley Sweeten, linux-kernel, Benjamin Herrenschmidt, Paul Mackerras, linuxppc-dev, David S. Miller, sparclinux, linux-arch, Paul Mundt, linux-sh [-- Attachment #1: Type: text/plain, Size: 2664 bytes --] Make if easier for more architectures to select it and thus disable drivers that use virt_to_bus(). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> --- arch/Kconfig | 7 +++++++ arch/powerpc/Kconfig | 4 +--- arch/sh/Kconfig | 4 +--- arch/sparc/Kconfig | 4 +--- 4 files changed, 10 insertions(+), 9 deletions(-) diff --git a/arch/Kconfig b/arch/Kconfig index 366ec06..9bc00e7 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -271,6 +271,13 @@ config ARCH_WANT_OLD_COMPAT_IPC select ARCH_WANT_COMPAT_IPC_PARSE_VERSION bool +config ARCH_NO_VIRT_TO_BUS + bool + help + An architecture should select this if it cannot (or will not) + implement virt_to_bus(). All new architectures should probably + select this. + config GENERIC_KERNEL_THREAD bool diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index a902a5c..8c8fcba 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -87,9 +87,6 @@ config GENERIC_GPIO help Generic GPIO API support -config ARCH_NO_VIRT_TO_BUS - def_bool PPC64 - config PPC bool default y @@ -101,6 +98,7 @@ config PPC select HAVE_FUNCTION_GRAPH_TRACER select SYSCTL_EXCEPTION_TRACE select ARCH_WANT_OPTIONAL_GPIOLIB + select ARCH_NO_VIRT_TO_BUS if PPC64 select HAVE_IDE select HAVE_IOREMAP_PROT select HAVE_EFFICIENT_UNALIGNED_ACCESS diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index babc2b8..9b28793 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -16,6 +16,7 @@ config SUPERH select HAVE_DEBUG_BUGVERBOSE select ARCH_HAVE_CUSTOM_GPIO_H select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) + select ARCH_NO_VIRT_TO_BUS select PERF_USE_VMALLOC select HAVE_DEBUG_KMEMLEAK select HAVE_KERNEL_GZIP @@ -150,9 +151,6 @@ config ARCH_HAS_ILOG2_U32 config ARCH_HAS_ILOG2_U64 def_bool n -config ARCH_NO_VIRT_TO_BUS - def_bool y - config ARCH_HAS_DEFAULT_IDLE def_bool y diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 9f2edb5..594d9bc 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -21,6 +21,7 @@ config SPARC select SYSCTL_EXCEPTION_TRACE select ARCH_WANT_OPTIONAL_GPIOLIB select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE + select ARCH_NO_VIRT_TO_BUS select RTC_CLASS select RTC_DRV_M48T59 select HAVE_IRQ_WORK @@ -143,9 +144,6 @@ config GENERIC_GPIO help Generic GPIO API support -config ARCH_NO_VIRT_TO_BUS - def_bool y - config ARCH_SUPPORTS_DEBUG_PAGEALLOC def_bool y if SPARC64 -- 1.7.10.280.gaa39 -- Cheers, Stephen Rothwell sfr@canb.auug.org.au [-- Attachment #2: Type: application/pgp-signature, Size: 836 bytes --] ^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS 2012-11-12 21:26 ` [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS Stephen Rothwell @ 2012-11-12 21:27 ` David Miller 2012-11-13 9:21 ` James Hogan ` (3 subsequent siblings) 4 siblings, 0 replies; 14+ messages in thread From: David Miller @ 2012-11-12 21:27 UTC (permalink / raw) To: sfr Cc: akpm, bhelgaas, hartleys, linux-kernel, benh, paulus, linuxppc-dev, sparclinux, linux-arch, lethal, linux-sh From: Stephen Rothwell <sfr@canb.auug.org.au> Date: Tue, 13 Nov 2012 08:26:15 +1100 > Make if easier for more architectures to select it and thus disable > drivers that use virt_to_bus(). > > Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: David S. Miller <davem@davemloft.net> ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS 2012-11-12 21:26 ` [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS Stephen Rothwell 2012-11-12 21:27 ` David Miller @ 2012-11-13 9:21 ` James Hogan 2012-11-13 10:32 ` Geert Uytterhoeven ` (2 subsequent siblings) 4 siblings, 0 replies; 14+ messages in thread From: James Hogan @ 2012-11-13 9:21 UTC (permalink / raw) To: Stephen Rothwell Cc: Andrew Morton, Bjorn Helgaas, H Hartley Sweeten, linux-kernel, Benjamin Herrenschmidt, Paul Mackerras, linuxppc-dev, David S. Miller, sparclinux, linux-arch, Paul Mundt, linux-sh -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 12/11/12 21:26, Stephen Rothwell wrote: > Make if easier for more architectures to select it and thus > disable drivers that use virt_to_bus(). > > Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Reviewed-by: James Hogan <james.hogan@imgtec.com> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAEBAgAGBQJQohD8AAoJEKHZs+irPybf82gP/Az9f+Q5Vn/fGkQwOOpfsxsl hpZGzIc7P6/ZU6IFWxN8hAKdJjOBH/ko0r+LMoczlQzlhlFd+qpDU+i2tZBqbp/G S+4w56J/PC5MtZFlUEh68e0H313Mgt9kK8vy4yVnzBTvIgGsJuXjeK4qQSKBm3LP LguU2AONT8GCfT8DRm9sbdS+WcXnBjRWeUkm8pZ+UX8kEe7ryaccidwvR16aP9l1 zx4HwFW0nCLYxwSOVQg2hi2pQyHD5sqFeLEYNbvEPlGleRKNJtz3bnYWbRdPkO2D CoRjiSw5/iCd/SghvwEKdkJFkOw4zdONElrBvsYXqn3QsFFpyYal43gyKIgPkSb6 s5OdTJ1ScS3IgtxFpQ1nfj020rS1ieM8eY/bXyuGPEZzwbe0moe+g64Qye9nEutn 7oWKoue1H8uRaJ46WoD22bjG7SezLycDnAlG6ujo75qyxeBcVJ9ZB6DxHPnEU02M P0sA8FLTFmzigRV2TBKBZbh3NrFGEi/riMA8U9f9XfLkxt7zdXGTvJ45C91U8HjT 3uQffRL/WBOQOILXtEFzf22DSPeoRklvyZmlHBsmNC6AYhSDnOvpUfOThaetQaFe voiFdDZhtxdk20l0DpReeAUBVUFOjBjh6NzWLZbVdrfgHrpndw7s7jjfy/e5vhDU wI2jW7slxuwARtv3Q1CV =XvmD -----END PGP SIGNATURE----- ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS 2012-11-12 21:26 ` [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS Stephen Rothwell 2012-11-12 21:27 ` David Miller 2012-11-13 9:21 ` James Hogan @ 2012-11-13 10:32 ` Geert Uytterhoeven 2012-11-14 14:53 ` Bjorn Helgaas 2012-11-14 12:23 ` Arnd Bergmann 2013-02-11 11:57 ` James Hogan 4 siblings, 1 reply; 14+ messages in thread From: Geert Uytterhoeven @ 2012-11-13 10:32 UTC (permalink / raw) To: Stephen Rothwell Cc: Andrew Morton, Bjorn Helgaas, H Hartley Sweeten, linux-kernel, Benjamin Herrenschmidt, Paul Mackerras, linuxppc-dev, David S. Miller, sparclinux, linux-arch, Paul Mundt, linux-sh On Mon, Nov 12, 2012 at 10:26 PM, Stephen Rothwell <sfr@canb.auug.org.au> wrote: > diff --git a/arch/Kconfig b/arch/Kconfig > index 366ec06..9bc00e7 100644 > --- a/arch/Kconfig > +++ b/arch/Kconfig > @@ -271,6 +271,13 @@ config ARCH_WANT_OLD_COMPAT_IPC > select ARCH_WANT_COMPAT_IPC_PARSE_VERSION > bool > > +config ARCH_NO_VIRT_TO_BUS > + bool > + help > + An architecture should select this if it cannot (or will not) > + implement virt_to_bus(). All new architectures should probably > + select this. Don't we typically put the burden of selecting Kconfig flags for deprecated features on the existing architectures that provide the deprecated features? I.e. shouldn't it be ARCH_HAS_VIRT_TO_BUS, selected by the architectures that need it, instead? Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS 2012-11-13 10:32 ` Geert Uytterhoeven @ 2012-11-14 14:53 ` Bjorn Helgaas 0 siblings, 0 replies; 14+ messages in thread From: Bjorn Helgaas @ 2012-11-14 14:53 UTC (permalink / raw) To: Geert Uytterhoeven Cc: Stephen Rothwell, Andrew Morton, H Hartley Sweeten, linux-kernel, Benjamin Herrenschmidt, Paul Mackerras, linuxppc-dev, David S. Miller, sparclinux, linux-arch, Paul Mundt, linux-sh On Tue, Nov 13, 2012 at 3:32 AM, Geert Uytterhoeven <geert@linux-m68k.org> wrote: > On Mon, Nov 12, 2012 at 10:26 PM, Stephen Rothwell <sfr@canb.auug.org.au> wrote: >> diff --git a/arch/Kconfig b/arch/Kconfig >> index 366ec06..9bc00e7 100644 >> --- a/arch/Kconfig >> +++ b/arch/Kconfig >> @@ -271,6 +271,13 @@ config ARCH_WANT_OLD_COMPAT_IPC >> select ARCH_WANT_COMPAT_IPC_PARSE_VERSION >> bool >> >> +config ARCH_NO_VIRT_TO_BUS >> + bool >> + help >> + An architecture should select this if it cannot (or will not) >> + implement virt_to_bus(). All new architectures should probably >> + select this. > > Don't we typically put the burden of selecting Kconfig flags for deprecated > features on the existing architectures that provide the deprecated features? > > I.e. shouldn't it be ARCH_HAS_VIRT_TO_BUS, selected by the architectures > that need it, instead? I like this idea. ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS 2012-11-12 21:26 ` [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS Stephen Rothwell ` (2 preceding siblings ...) 2012-11-13 10:32 ` Geert Uytterhoeven @ 2012-11-14 12:23 ` Arnd Bergmann 2013-02-11 11:57 ` James Hogan 4 siblings, 0 replies; 14+ messages in thread From: Arnd Bergmann @ 2012-11-14 12:23 UTC (permalink / raw) To: Stephen Rothwell Cc: Andrew Morton, Bjorn Helgaas, H Hartley Sweeten, linux-kernel, Benjamin Herrenschmidt, Paul Mackerras, linuxppc-dev, David S. Miller, sparclinux, linux-arch, Paul Mundt, linux-sh On Monday 12 November 2012, Stephen Rothwell wrote: > Show Details > Make if easier for more architectures to select it and thus disable > drivers that use virt_to_bus(). > > Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Very nice, I was recently looking into enabling this for ARM as well, at least for the platforms that are known to not need virt_to_bus. Acked-by: Arnd Bergmann <arnd@arndb.de> ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS 2012-11-12 21:26 ` [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS Stephen Rothwell ` (3 preceding siblings ...) 2012-11-14 12:23 ` Arnd Bergmann @ 2013-02-11 11:57 ` James Hogan 2013-02-12 4:40 ` Stephen Rothwell 4 siblings, 1 reply; 14+ messages in thread From: James Hogan @ 2013-02-11 11:57 UTC (permalink / raw) To: Stephen Rothwell Cc: Andrew Morton, Bjorn Helgaas, H Hartley Sweeten, linux-kernel, Benjamin Herrenschmidt, Paul Mackerras, linuxppc-dev, David S. Miller, sparclinux, linux-arch, Paul Mundt, linux-sh, Vineet Gupta [-- Attachment #1: Type: text/plain, Size: 364 bytes --] Hi Stephen, On 12/11/12 21:26, Stephen Rothwell wrote: > Make if easier for more architectures to select it and thus disable > drivers that use virt_to_bus(). > > Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> I was just wondering what the status of this patch is? It was in -next for a while but seems to have disappeared. Cheers James [-- Attachment #2: OpenPGP digital signature --] [-- Type: application/pgp-signature, Size: 836 bytes --] ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS 2013-02-11 11:57 ` James Hogan @ 2013-02-12 4:40 ` Stephen Rothwell 2013-02-12 11:47 ` Stephen Rothwell 0 siblings, 1 reply; 14+ messages in thread From: Stephen Rothwell @ 2013-02-12 4:40 UTC (permalink / raw) To: James Hogan Cc: Andrew Morton, Bjorn Helgaas, H Hartley Sweeten, linux-kernel, Benjamin Herrenschmidt, Paul Mackerras, linuxppc-dev, David S. Miller, sparclinux, linux-arch, Paul Mundt, linux-sh, Vineet Gupta [-- Attachment #1: Type: text/plain, Size: 664 bytes --] Hi James, On Mon, 11 Feb 2013 11:57:28 +0000 James Hogan <james.hogan@imgtec.com> wrote: > > On 12/11/12 21:26, Stephen Rothwell wrote: > > Make if easier for more architectures to select it and thus disable > > drivers that use virt_to_bus(). > > > > Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> > > I was just wondering what the status of this patch is? It was in -next > for a while but seems to have disappeared. Yeah, I think Andrew dropped it in favour of a more complete solution which I haven't written yet. Let me dig out the emails and have a shot. -- Cheers, Stephen Rothwell sfr@canb.auug.org.au [-- Attachment #2: Type: application/pgp-signature, Size: 836 bytes --] ^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS 2013-02-12 4:40 ` Stephen Rothwell @ 2013-02-12 11:47 ` Stephen Rothwell 2013-02-12 12:04 ` James Hogan 0 siblings, 1 reply; 14+ messages in thread From: Stephen Rothwell @ 2013-02-12 11:47 UTC (permalink / raw) To: Andrew Morton Cc: James Hogan, Bjorn Helgaas, H Hartley Sweeten, linux-kernel, Benjamin Herrenschmidt, Paul Mackerras, linuxppc-dev, David S. Miller, sparclinux, linux-arch, Paul Mundt, linux-sh, Vineet Gupta [-- Attachment #1: Type: text/plain, Size: 11133 bytes --] Change it to CONFIG_HAVE_VIRT_TO_BUS and set it in all architecures that already provide virt_to_bus(). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> --- arch/Kconfig | 7 +++++++ arch/alpha/Kconfig | 1 + arch/arm/Kconfig | 1 + arch/avr32/Kconfig | 1 + arch/blackfin/Kconfig | 1 + arch/cris/Kconfig | 1 + arch/frv/Kconfig | 1 + arch/h8300/Kconfig | 1 + arch/ia64/Kconfig | 1 + arch/m32r/Kconfig | 1 + arch/m68k/Kconfig | 1 + arch/microblaze/Kconfig | 1 + arch/mips/Kconfig | 1 + arch/mn10300/Kconfig | 1 + arch/openrisc/Kconfig | 1 + arch/parisc/Kconfig | 1 + arch/powerpc/Kconfig | 4 +--- arch/s390/Kconfig | 1 + arch/score/Kconfig | 1 + arch/sh/Kconfig | 3 --- arch/sparc/Kconfig | 3 --- arch/tile/Kconfig | 1 + arch/unicore32/Kconfig | 1 + arch/x86/Kconfig | 1 + arch/xtensa/Kconfig | 1 + mm/Kconfig | 2 +- 26 files changed, 30 insertions(+), 10 deletions(-) This is based on v3.8-rc7. I think I got them all (apart from arc and metag). diff --git a/arch/Kconfig b/arch/Kconfig index 7f8f281..7721b40 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -291,6 +291,13 @@ config ARCH_WANT_OLD_COMPAT_IPC select ARCH_WANT_COMPAT_IPC_PARSE_VERSION bool +config HAVE_VIRT_TO_BUS + bool + help + An architecture should select this if it implements the + deprecated interface virt_to_bus(). All new architectures + should probably not select this. + config HAVE_ARCH_SECCOMP_FILTER bool help diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 9d5904c..63f49b1 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -10,6 +10,7 @@ config ALPHA select HAVE_PERF_EVENTS select HAVE_DMA_ATTRS select HAVE_GENERIC_HARDIRQS + select HAVE_VIRT_TO_BUS select GENERIC_IRQ_PROBE select AUTO_IRQ_AFFINITY if SMP select GENERIC_IRQ_SHOW diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 67874b8..23f99e1 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -49,6 +49,7 @@ config ARM select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_SYSCALL_TRACEPOINTS select HAVE_UID16 + select HAVE_VIRT_TO_BUS select KTIME_SCALAR select PERF_USE_VMALLOC select RTC_LIB diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig index 2ae6591..9b89257 100644 --- a/arch/avr32/Kconfig +++ b/arch/avr32/Kconfig @@ -7,6 +7,7 @@ config AVR32 select HAVE_OPROFILE select HAVE_KPROBES select HAVE_GENERIC_HARDIRQS + select HAVE_VIRT_TO_BUS select GENERIC_IRQ_PROBE select GENERIC_ATOMIC64 select HARDIRQS_SW_RESEND diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index b6f3ad5..834a6e3 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -34,6 +34,7 @@ config BLACKFIN select ARCH_HAVE_CUSTOM_GPIO_H select ARCH_WANT_OPTIONAL_GPIOLIB select HAVE_UID16 + select HAVE_VIRT_TO_BUS select ARCH_WANT_IPC_PARSE_VERSION select HAVE_GENERIC_HARDIRQS select GENERIC_ATOMIC64 diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig index c59a01d..abe1fd2 100644 --- a/arch/cris/Kconfig +++ b/arch/cris/Kconfig @@ -43,6 +43,7 @@ config CRIS select GENERIC_ATOMIC64 select HAVE_GENERIC_HARDIRQS select HAVE_UID16 + select HAVE_VIRT_TO_BUS select ARCH_WANT_IPC_PARSE_VERSION select GENERIC_IRQ_SHOW select GENERIC_IOMAP diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig index 9d26264..8ca9099 100644 --- a/arch/frv/Kconfig +++ b/arch/frv/Kconfig @@ -7,6 +7,7 @@ config FRV select HAVE_PERF_EVENTS select HAVE_UID16 select HAVE_GENERIC_HARDIRQS + select HAVE_VIRT_TO_BUS select GENERIC_IRQ_SHOW select HAVE_DEBUG_BUGVERBOSE select ARCH_HAVE_NMI_SAFE_CMPXCHG diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig index 2d2efb6..ce7c55e 100644 --- a/arch/h8300/Kconfig +++ b/arch/h8300/Kconfig @@ -5,6 +5,7 @@ config H8300 select HAVE_GENERIC_HARDIRQS select GENERIC_ATOMIC64 select HAVE_UID16 + select HAVE_VIRT_TO_BUS select ARCH_WANT_IPC_PARSE_VERSION select GENERIC_IRQ_SHOW select GENERIC_CPU_DEVICES diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 3279646..4c09006 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -26,6 +26,7 @@ config IA64 select HAVE_MEMBLOCK select HAVE_MEMBLOCK_NODE_MAP select HAVE_VIRT_CPU_ACCOUNTING + select HAVE_VIRT_TO_BUS select ARCH_DISCARD_MEMBLOCK select GENERIC_IRQ_PROBE select GENERIC_PENDING_IRQ if SMP diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig index f807721..9262381 100644 --- a/arch/m32r/Kconfig +++ b/arch/m32r/Kconfig @@ -10,6 +10,7 @@ config M32R select ARCH_WANT_IPC_PARSE_VERSION select HAVE_DEBUG_BUGVERBOSE select HAVE_GENERIC_HARDIRQS + select HAVE_VIRT_TO_BUS select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW select GENERIC_ATOMIC64 diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index 6710084..a12199b 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -8,6 +8,7 @@ config M68K select GENERIC_IRQ_SHOW select GENERIC_ATOMIC64 select HAVE_UID16 + select HAVE_VIRT_TO_BUS select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS select GENERIC_CPU_DEVICES select GENERIC_STRNCPY_FROM_USER if MMU diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index ba3b7c8..7843d11 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -19,6 +19,7 @@ config MICROBLAZE select HAVE_DEBUG_KMEMLEAK select IRQ_DOMAIN select HAVE_GENERIC_HARDIRQS + select HAVE_VIRT_TO_BUS select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW select GENERIC_PCI_IOMAP diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 2ac626a..7013aaa 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -39,6 +39,7 @@ config MIPS select GENERIC_CLOCKEVENTS select GENERIC_CMOS_UPDATE select HAVE_MOD_ARCH_SPECIFIC + select HAVE_VIRT_TO_BUS select MODULES_USE_ELF_REL if MODULES select MODULES_USE_ELF_RELA if MODULES && 64BIT diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig index e70001c..0d1582d 100644 --- a/arch/mn10300/Kconfig +++ b/arch/mn10300/Kconfig @@ -8,6 +8,7 @@ config MN10300 select HAVE_ARCH_KGDB select GENERIC_ATOMIC64 select HAVE_NMI_WATCHDOG if MN10300_WD_TIMER + select HAVE_VIRT_TO_BUS select GENERIC_CLOCKEVENTS select MODULES_USE_ELF_RELA diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig index 0ac66f6..b62ed01 100644 --- a/arch/openrisc/Kconfig +++ b/arch/openrisc/Kconfig @@ -12,6 +12,7 @@ config OPENRISC select ARCH_WANT_OPTIONAL_GPIOLIB select HAVE_ARCH_TRACEHOOK select HAVE_GENERIC_HARDIRQS + select HAVE_VIRT_TO_BUS select GENERIC_IRQ_CHIP select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index b77feff..598cf09 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -21,6 +21,7 @@ config PARISC select GENERIC_SMP_IDLE_THREAD select GENERIC_STRNCPY_FROM_USER select HAVE_MOD_ARCH_SPECIFIC + select HAVE_VIRT_TO_BUS select MODULES_USE_ELF_RELA select CLONE_BACKWARDS diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 17903f1..f492ad9 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -87,9 +87,6 @@ config GENERIC_GPIO help Generic GPIO API support -config ARCH_NO_VIRT_TO_BUS - def_bool PPC64 - config PPC bool default y @@ -101,6 +98,7 @@ config PPC select HAVE_FUNCTION_GRAPH_TRACER select SYSCTL_EXCEPTION_TRACE select ARCH_WANT_OPTIONAL_GPIOLIB + select HAVE_VIRT_TO_BUS if !PPC64 select HAVE_IDE select HAVE_IOREMAP_PROT select HAVE_EFFICIENT_UNALIGNED_ACCESS diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index b5ea38c..5d23fa6 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -98,6 +98,7 @@ config S390 select HAVE_CMPXCHG_DOUBLE select HAVE_ALIGNED_STRUCT_PAGE if SLUB select HAVE_VIRT_CPU_ACCOUNTING + select HAVE_VIRT_TO_BUS select VIRT_CPU_ACCOUNTING select ARCH_DISCARD_MEMBLOCK select BUILDTIME_EXTABLE_SORT diff --git a/arch/score/Kconfig b/arch/score/Kconfig index 3b1482e..e569aa1 100644 --- a/arch/score/Kconfig +++ b/arch/score/Kconfig @@ -12,6 +12,7 @@ config SCORE select GENERIC_CPU_DEVICES select GENERIC_CLOCKEVENTS select HAVE_MOD_ARCH_SPECIFIC + select HAVE_VIRT_TO_BUS select MODULES_USE_ELF_REL select CLONE_BACKWARDS diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index babc2b8..efa4c8c 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -150,9 +150,6 @@ config ARCH_HAS_ILOG2_U32 config ARCH_HAS_ILOG2_U64 def_bool n -config ARCH_NO_VIRT_TO_BUS - def_bool y - config ARCH_HAS_DEFAULT_IDLE def_bool y diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 9f2edb5..aaa20de 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -143,9 +143,6 @@ config GENERIC_GPIO help Generic GPIO API support -config ARCH_NO_VIRT_TO_BUS - def_bool y - config ARCH_SUPPORTS_DEBUG_PAGEALLOC def_bool y if SPARC64 diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig index 875d008..61a6e59 100644 --- a/arch/tile/Kconfig +++ b/arch/tile/Kconfig @@ -17,6 +17,7 @@ config TILE select GENERIC_IRQ_SHOW select HAVE_DEBUG_BUGVERBOSE select HAVE_SYSCALL_WRAPPERS if TILEGX + select HAVE_VIRT_TO_BUS select SYS_HYPERVISOR select ARCH_HAVE_NMI_SAFE_CMPXCHG select GENERIC_CLOCKEVENTS diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig index 60651df..dc50b15 100644 --- a/arch/unicore32/Kconfig +++ b/arch/unicore32/Kconfig @@ -9,6 +9,7 @@ config UNICORE32 select GENERIC_ATOMIC64 select HAVE_KERNEL_LZO select HAVE_KERNEL_LZMA + select HAVE_VIRT_TO_BUS select ARCH_HAVE_CUSTOM_GPIO_H select GENERIC_FIND_FIRST_BIT select GENERIC_IRQ_PROBE diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 225543b..3d3304d 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -110,6 +110,7 @@ config X86 select GENERIC_STRNLEN_USER select HAVE_CONTEXT_TRACKING if X86_64 select HAVE_IRQ_TIME_ACCOUNTING + select HAVE_VIRT_TO_BUS select MODULES_USE_ELF_REL if X86_32 select MODULES_USE_ELF_RELA if X86_64 select CLONE_BACKWARDS if X86_32 diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 5aab1ac..e0c082b 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -9,6 +9,7 @@ config XTENSA select HAVE_IDE select GENERIC_ATOMIC64 select HAVE_GENERIC_HARDIRQS + select HAVE_VIRT_TO_BUS select GENERIC_IRQ_SHOW select GENERIC_CPU_DEVICES select MODULES_USE_ELF_RELA diff --git a/mm/Kconfig b/mm/Kconfig index 278e3ab..6d5996f 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -266,7 +266,7 @@ config NR_QUICK config VIRT_TO_BUS def_bool y - depends on !ARCH_NO_VIRT_TO_BUS + depends on HAVE_VIRT_TO_BUS config MMU_NOTIFIER bool -- 1.8.1 -- Cheers, Stephen Rothwell sfr@canb.auug.org.au [-- Attachment #2: Type: application/pgp-signature, Size: 836 bytes --] ^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS 2013-02-12 11:47 ` Stephen Rothwell @ 2013-02-12 12:04 ` James Hogan 0 siblings, 0 replies; 14+ messages in thread From: James Hogan @ 2013-02-12 12:04 UTC (permalink / raw) To: Stephen Rothwell Cc: Andrew Morton, Bjorn Helgaas, H Hartley Sweeten, linux-kernel, Benjamin Herrenschmidt, Paul Mackerras, linuxppc-dev, David S. Miller, sparclinux, linux-arch, Paul Mundt, linux-sh, Vineet Gupta [-- Attachment #1: Type: text/plain, Size: 321 bytes --] On 12/02/13 11:47, Stephen Rothwell wrote: > Change it to CONFIG_HAVE_VIRT_TO_BUS and set it in all architecures nit: typo in "architecures" > that already provide virt_to_bus(). > > Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Reviewed-by: James Hogan <james.hogan@imgtec.com> Cheers James [-- Attachment #2: OpenPGP digital signature --] [-- Type: application/pgp-signature, Size: 836 bytes --] ^ permalink raw reply [flat|nested] 14+ messages in thread
* RE: Q: Kconfig option VIRT_TO_BUS 2012-11-12 18:40 ` Bjorn Helgaas 2012-11-12 21:26 ` [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS Stephen Rothwell @ 2012-11-12 23:13 ` H Hartley Sweeten 2012-11-12 23:16 ` Bjorn Helgaas 1 sibling, 1 reply; 14+ messages in thread From: H Hartley Sweeten @ 2012-11-12 23:13 UTC (permalink / raw) To: Bjorn Helgaas; +Cc: linux-kernel, Stephen Rothwell On Monday, November 12, 2012 11:41 AM, Bjorn Helgaas wrote: > On Mon, Nov 12, 2012 at 9:18 AM, H Hartley Sweeten wrote: >> Does anyone know what the Kconfig option VIRT_TO_BUS does? >> There are a number of "depends on" that option but it does not >> seem to directly enable any code in the kernel. > > virt_to_bus() is a deprecated interface for converting a kernel > virtual address to a bus address. It's deprecated because it's > impossible to implement correctly when there are multiple bus address > spaces, because you don't know which bus address space the caller has > in mind. Thanks for the info. So if a driver does not use virt_to_bus() then the "depends on VIRT_TO_BUS" is not necessary. Correct? Thanks, Hartley ^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Q: Kconfig option VIRT_TO_BUS 2012-11-12 23:13 ` Q: Kconfig option VIRT_TO_BUS H Hartley Sweeten @ 2012-11-12 23:16 ` Bjorn Helgaas 0 siblings, 0 replies; 14+ messages in thread From: Bjorn Helgaas @ 2012-11-12 23:16 UTC (permalink / raw) To: H Hartley Sweeten; +Cc: linux-kernel, Stephen Rothwell On Mon, Nov 12, 2012 at 4:13 PM, H Hartley Sweeten <hartleys@visionengravers.com> wrote: > On Monday, November 12, 2012 11:41 AM, Bjorn Helgaas wrote: >> On Mon, Nov 12, 2012 at 9:18 AM, H Hartley Sweeten wrote: >>> Does anyone know what the Kconfig option VIRT_TO_BUS does? >>> There are a number of "depends on" that option but it does not >>> seem to directly enable any code in the kernel. >> >> virt_to_bus() is a deprecated interface for converting a kernel >> virtual address to a bus address. It's deprecated because it's >> impossible to implement correctly when there are multiple bus address >> spaces, because you don't know which bus address space the caller has >> in mind. > > Thanks for the info. > > So if a driver does not use virt_to_bus() then the "depends on VIRT_TO_BUS" > is not necessary. Correct? Yes, that's my understanding. ^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2013-02-12 12:04 UTC | newest] Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-11-12 16:18 Q: Kconfig option VIRT_TO_BUS H Hartley Sweeten 2012-11-12 18:40 ` Bjorn Helgaas 2012-11-12 21:26 ` [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS Stephen Rothwell 2012-11-12 21:27 ` David Miller 2012-11-13 9:21 ` James Hogan 2012-11-13 10:32 ` Geert Uytterhoeven 2012-11-14 14:53 ` Bjorn Helgaas 2012-11-14 12:23 ` Arnd Bergmann 2013-02-11 11:57 ` James Hogan 2013-02-12 4:40 ` Stephen Rothwell 2013-02-12 11:47 ` Stephen Rothwell 2013-02-12 12:04 ` James Hogan 2012-11-12 23:13 ` Q: Kconfig option VIRT_TO_BUS H Hartley Sweeten 2012-11-12 23:16 ` Bjorn Helgaas
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