[PATCH v2] powerpc: allow compiling with GENERIC_MSI_IRQ_DOMAIN

From: Laurentiu Tudor <laurentiu.tudor@nxp.com>

This allows building powerpc with the GENERIC_MSI_IRQ_DOMAIN
Kconfig by enabling the asm-generic msi.h in Kbuild. Without
this, there's a compilation error [1] because powerpc, as most
arches, doesn't provide an asm/msi.h.

[1] In file included from ./include/linux/kvm_host.h:20:0,
                 from ./arch/powerpc/include/asm/kvm_ppc.h:30,
                 from arch/powerpc/kernel/dbell.c:20:
./include/linux/msi.h:195:21: fatal error: asm/msi.h: No such file or directory

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
---
v2:
 - compilation error happens when GENERIC_MSI_IRQ_DOMAIN is enabled and not
   GENERIC_MSI_IRQ, so fix commit msg and title

previous version: https://patchwork.ozlabs.org/patch/782735/

 arch/powerpc/include/asm/Kbuild | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/include/asm/Kbuild b/arch/powerpc/include/asm/Kbuild
index 5c4fbc8..2542ea1 100644
--- a/arch/powerpc/include/asm/Kbuild
+++ b/arch/powerpc/include/asm/Kbuild

@@ -8,3 +8,4 @@ generic-y += mcs_spinlock.h
 generic-y += preempt.h
 generic-y += rwsem.h
 generic-y += vtime.h
+generic-y += msi.h

-- 
2.9.4

laurentiu.tudor@nxp.com writes:

From: Laurentiu Tudor <laurentiu.tudor@nxp.com>

This allows building powerpc with the GENERIC_MSI_IRQ_DOMAIN
Kconfig by enabling the asm-generic msi.h in Kbuild. Without
this, there's a compilation error [1] because powerpc, as most
arches, doesn't provide an asm/msi.h.

[1] In file included from ./include/linux/kvm_host.h:20:0,
                 from ./arch/powerpc/include/asm/kvm_ppc.h:30,
                 from arch/powerpc/kernel/dbell.c:20:
./include/linux/msi.h:195:21: fatal error: asm/msi.h: No such file or directory

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
---
v2:
 - compilation error happens when GENERIC_MSI_IRQ_DOMAIN is enabled and not
   GENERIC_MSI_IRQ, so fix commit msg and title

It looks like the only way powerpc can enable GENERIC_MSI_IRQ_DOMAIN is
by enabling FSL_MC_BUS ?

cheers

Hi Michael,

On 07/18/2017 01:55 PM, Michael Ellerman wrote:

laurentiu.tudor@nxp.com writes:

quoted

From: Laurentiu Tudor <laurentiu.tudor@nxp.com>

This allows building powerpc with the GENERIC_MSI_IRQ_DOMAIN
Kconfig by enabling the asm-generic msi.h in Kbuild. Without
this, there's a compilation error [1] because powerpc, as most
arches, doesn't provide an asm/msi.h.

[1] In file included from ./include/linux/kvm_host.h:20:0,
                  from ./arch/powerpc/include/asm/kvm_ppc.h:30,
                  from arch/powerpc/kernel/dbell.c:20:
./include/linux/msi.h:195:21: fatal error: asm/msi.h: No such file or di=

rectory

quoted

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
---
v2:
  - compilation error happens when GENERIC_MSI_IRQ_DOMAIN is enabled and=

 not

quoted

    GENERIC_MSI_IRQ, so fix commit msg and title

It looks like the only way powerpc can enable GENERIC_MSI_IRQ_DOMAIN is
by enabling FSL_MC_BUS ?

Yes, i think so. I'm currently working on making FSL_MC_BUS compile=20
multi-arch [1] and that's how i hit this compilation error on ppc.

[1] https://lkml.org/lkml/2017/7/17/415

---
Best Regards, Laurentiu=

On Mon, 2017-07-17 at 13:12:43 UTC, laurentiu.tudor@nxp.com wrote:

From: Laurentiu Tudor <laurentiu.tudor@nxp.com>

This allows building powerpc with the GENERIC_MSI_IRQ_DOMAIN
Kconfig by enabling the asm-generic msi.h in Kbuild. Without
this, there's a compilation error [1] because powerpc, as most
arches, doesn't provide an asm/msi.h.

[1] In file included from ./include/linux/kvm_host.h:20:0,
                 from ./arch/powerpc/include/asm/kvm_ppc.h:30,
                 from arch/powerpc/kernel/dbell.c:20:
./include/linux/msi.h:195:21: fatal error: asm/msi.h: No such file or directory

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/8f36479d0eda3c078ee4e1ec79ea9a

cheers