kernel/linux.git/arch/powerpc/platforms/powermac, branch linux-4.4.y

powerpc/32s: fix suspend/resume when IBATs 4-7 are used

2019-08-04T07:34:52+00:00

commit 6ecb78ef56e08d2119d337ae23cb951a640dc52d upstream. Previously, only IBAT1 and IBAT2 were used to map kernel linear mem. Since commit 63b2bc619565 ("powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX"), we may have all 8 BATs used for mapping kernel text. But the suspend/restore functions only save/restore BATs 0 to 3, and clears BATs 4 to 7. Make suspend and restore functions respectively save and reload the 8 BATs on CPUs having MMU_FTR_USE_HIGH_BATS feature. Reported-by: Andreas Schwab Cc: stable@vger.kernel.org Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman

powerpc/powermac: Mark variable x as unused

2018-08-06T14:24:34+00:00

[ Upstream commit 5a4b475cf8511da721f20ba432c244061db7139f ] Since the value of x is never intended to be read, declare it with gcc attribute as unused. Fix warning treated as error with W=1: arch/powerpc/platforms/powermac/bootx_init.c:471:21: error: variable ‘x’ set but not used [-Werror=unused-but-set-variable] Suggested-by: Christophe Leroy Signed-off-by: Mathieu Malaterre Signed-off-by: Michael Ellerman Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

powerpc/powermac: Add missing prototype for note_bootable_part()

2018-08-06T14:24:34+00:00

[ Upstream commit f72cf3f1d49f2c35d6cb682af2e8c93550f264e4 ] Add a missing prototype for function `note_bootable_part` to silence a warning treated as error with W=1: arch/powerpc/platforms/powermac/setup.c:361:12: error: no previous prototype for ‘note_bootable_part’ [-Werror=missing-prototypes] Suggested-by: Christophe Leroy Signed-off-by: Mathieu Malaterre Signed-off-by: Michael Ellerman Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

powerpc: Kconfig: remove BE-only platforms from LE kernel build

2015-09-29T12:57:00+00:00

Currently, little endian is only supported on powernv and pseries, however, Kconfigs still allow us to include other platforms in a LE kernel, this may result in space wasting or even build error if some BE-only platforms always assume they are built for a BE kernel. So just modify the Kconfigs of BE-only platforms to remove them from being built for a LE kernel. For 32bit only platforms, nothing needs to be done, because CPU_LITTLE_ENDIAN depends on PPC64. For 64bit supported platforms, add CPU_BIG_ENDIAN to dependencies explicitly, so that these platforms will be disabled for LE [Suggested-by: Cédric Le Goater ]. Signed-off-by: Boqun Feng Acked-by: Geoff Levand Signed-off-by: Michael Ellerman

genirq/irqdomain: Allow irq domain aliasing

2015-07-29T22:14:36+00:00

It is not uncommon (at least with the ARM stuff) to have a piece of hardware that implements different flavours of "interrupts". A typical example of this is the GICv3 ITS, which implements standard PCI/MSI support, but also some form of "generic MSI". So far, the PCI/MSI domain is registered using the ITS device_node, so that irq_find_host can return it. On the contrary, the raw MSI domain is not registered with an device_node, making it impossible to be looked up by another subsystem (obviously, using the same device_node twice would only result in confusion, as it is not defined which one irq_find_host would return). A solution to this is to "type" domains that may be aliasing, and to be able to lookup an device_node that matches a given type. For this, we introduce irq_find_matching_host() as a superset of irq_find_host: struct irq_domain *irq_find_matching_host(struct device_node *node, enum irq_domain_bus_token bus_token); where bus_token is the "type" we want to match the domain against (so far, only DOMAIN_BUS_ANY is defined). This result in some moderately invasive changes on the PPC side (which is the only user of the .match method). This has otherwise no functionnal change. Reviewed-by: Hanjun Guo Signed-off-by: Marc Zyngier Cc: Cc: Yijing Wang Cc: Ma Jun Cc: Lorenzo Pieralisi Cc: Duc Dang Cc: Bjorn Helgaas Cc: Jiang Liu Cc: Jason Cooper Link: http://lkml.kernel.org/r/1438091186-10244-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner

powerpc/powermac: Fix build error seen with powermac smp builds

2015-04-15T05:52:59+00:00

powermac smp builds fail with arch/powerpc/platforms/powermac/smp.c: In function 'smp_psurge_probe': arch/powerpc/platforms/powermac/smp.c:278:3: error: 'return' with a value, in function returning void There are several instances of this error. Fixes: a7f4ee1fe93a ("powerpc: Drop return value of smp_ops->probe()") Signed-off-by: Guenter Roeck Signed-off-by: Michael Ellerman

powerpc/powermac: Move controller ops from ppc_md to controller_ops

2015-04-11T10:49:15+00:00

This moves the Power Mac platform to use the pci_controller_ops structure rather than ppc_md for PCI controller operations. Signed-off-by: Daniel Axtens Signed-off-by: Michael Ellerman

powerpc: dart_iommu: optionally populate controller_ops on init

2015-04-11T10:49:14+00:00

If a pci_controller_ops struct is provided to iommu_init_early_dart, populate that with the DMA setup ops, rather than ppc_md. If NULL is provided, populate ppc_md as before. This also patches the call sites for Maple and Power Mac to pass NULL, so existing behaviour is preserved. The benefit of making this optional is that it means we don't have to change dart, Maple and Power Mac over to the controller_ops system in one fell swoop. Signed-off-by: Daniel Axtens Signed-off-by: Michael Ellerman

powerpc: pcibios_enable_device_hook: return bool rather than int

2015-04-11T10:49:10+00:00

pcibios_enable_device_hook returned an int. Every implementation returned either -EINVAL or 0. The return value wasn't propagated by the caller: any non-zero return value caused pcibios_enable_device to return -EINVAL itself. Therefore, make the hook return a bool. Signed-off-by: Daniel Axtens Signed-off-by: Michael Ellerman

powerpc/powermac: move pmac_pci_probe_mode from setup.c to pci.c

2015-04-11T10:49:10+00:00

Signed-off-by: Daniel Axtens Signed-off-by: Michael Ellerman