kernel.git/arch/powerpc/kernel/machine_kexec_64.c, branch linux-4.10.y

powerpc: Add purgatory for kexec_file_load() implementation.

2016-11-30T12:15:26Z

This purgatory implementation is based on the versions from kexec-tools and kexec-lite, with additional changes. Signed-off-by: Thiago Jung Bauermann Signed-off-by: Michael Ellerman

powerpc/64/kexec: Remove BookE special default_machine_kexec_prepare()

2016-09-22T21:54:18Z

The only difference is now the TCE table check which doesn't need to be ifdef'ed out, it will basically do nothing on BookE (it is only useful for ancient IBM machines). Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc/64/kexec: Copy image with MMU off when possible

2016-09-22T21:54:18Z

Currently we turn the MMU off after copying the image, and we make sure there is no overlap between the hash table and the target pages in that case. That doesn't work for Radix however. In that case, the page tables are scattered and we can't really enforce that the target of the image isn't overlapping one of them. So instead, let's turn the MMU off before copying the image in radix mode. Thankfully, in radix mode, even under a hypervisor, we know we don't have the same kind of RMA limitations that hash mode has. While at it, also turn the MMU off early when using hash in non-LPAR mode, that way we can get rid of the collision check completely. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Aneesh Kumar K.V Acked-by: Balbir Singh Signed-off-by: Michael Ellerman

powerpc/64/kexec: Fix MMU cleanup on radix

2016-09-22T21:54:17Z

Just using the hash ops won't work anymore since radix will have NULL in there. Instead create an mmu_cleanup_all() function which will do the right thing based on the MMU mode. For Radix, for now I clear UPRT and the PTCR, effectively switching back to Radix with no partition table setup. Currently set it to NULL on BookE thought it might be a good idea to wipe the TLB there (Scott ?) Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Aneesh Kumar K.V Acked-by: Balbir Singh Signed-off-by: Michael Ellerman

powerpc/mm: Move hash table ops to a separate structure

2016-07-21T08:59:09Z

Moving probe_machine() to after mmu init will cause the ppc_md fields relative to the hash table management to be overwritten. Since we have essentially disconnected the machine type from the hash backend ops, finish the job by moving them to a different structure. The only callback that didn't quite fix is update_partition_table since this is not specific to hash, so I moved it to a standalone variable for now. We can revisit later if needed. Signed-off-by: Benjamin Herrenschmidt [mpe: Fix ppc64e build failure in kexec] Signed-off-by: Michael Ellerman

powerpc: Introduce asm-prototypes.h

2016-06-16T12:39:54Z

Sparse picked up a number of functions that are implemented in C and then only referred to in asm code. This introduces asm-prototypes.h, which provides a place for prototypes of these functions. This silences some sparse warnings. Signed-off-by: Daniel Axtens [mpe: Add include guards, clean up copyright & GPL text] Signed-off-by: Michael Ellerman

powerpc: Update of_remove_property() call sites to remove null checking

2016-05-11T11:54:04Z

After obtaining a property from of_find_property() and before calling of_remove_property() most code checks to ensure that the property returned from of_find_property() is not null. The previous patch moved this check to the start of the function of_remove_property() in order to avoid the case where this check isn't done and a null value is passed. This ensures the check is always conducted before taking locks and attempting to remove the property. Thus it is no longer necessary to perform a check for null values before invoking of_remove_property(). Update of_remove_property() call sites in order to remove redundant checking for null property value as check is now performed within the of_remove_property function(). Signed-off-by: Suraj Jitindar Singh [mpe: Unbreak some lines which are just >80 chars for readability] Signed-off-by: Michael Ellerman

powerpc/mm/radix: Use STD_MMU_64 to properly isolate hash related code

2016-05-11T11:53:45Z

We also use MMU_FTR_RADIX to branch out from code path specific to hash. No functionality change. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc/book3e-64: Enable kexec

2015-10-27T23:13:30Z

Allow KEXEC for book3e, and bypass or convert non-book3e stuff in kexec code. Signed-off-by: Tiejun Chen [scottwood@freescale.com: move code to minimize diff, and cleanup] Signed-off-by: Scott Wood

kexec: add IND_FLAGS macro

2015-02-17T22:34:51Z

Add a new kexec preprocessor macro IND_FLAGS, which is the bitwise OR of all the possible kexec IND_ kimage_entry indirection flags. Having this macro allows for simplified code in the prosessing of the kexec kimage_entry items. Also, remove the local powerpc definition and use the generic one. Signed-off-by: Geoff Levand Acked-by: Benjamin Herrenschmidt Acked-by: Vivek Goyal Cc: Arnd Bergmann Cc: Maximilian Attems Cc: Michal Marek Cc: H. Peter Anvin Cc: Paul Bolle Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds