forked from Minki/linux
5cd6fa6de5
In __cpu_setup we conditionally manipulate the TCR_EL1 value in x10 after previously using x10 as a scratch register for unrelated temporary variables. To make this a bit clearer, let's move the TCR_EL1 value into a named register `tcr`. To simplify the register allocation, this is placed in the highest available caller-saved scratch register, tcr. Following the example of `mair`, we initialise the register with the default value prior to any feature discovery, and write it to MAIR_EL1 after all feature discovery is complete, which allows us to simplify the featuere discovery code. The existing `mte_tcr` register is no longer needed, and is replaced by the use of x10 as a temporary, matching the rest of the MTE feature discovery assembly in __cpu_setup. As x20 is no longer used, the function is now AAPCS compliant, as we've generally aimed for in our assembly functions. There should be no functional change as as a result of this patch. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Marc Zyngier <maz@kernel.org> Cc: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20210326180137.43119-3-mark.rutland@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> |
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| .. | ||
| cache.S | ||
| context.c | ||
| copypage.c | ||
| dma-mapping.c | ||
| extable.c | ||
| fault.c | ||
| flush.c | ||
| hugetlbpage.c | ||
| init.c | ||
| ioremap.c | ||
| kasan_init.c | ||
| Makefile | ||
| mmap.c | ||
| mmu.c | ||
| mteswap.c | ||
| pageattr.c | ||
| pgd.c | ||
| physaddr.c | ||
| proc.S | ||
| ptdump_debugfs.c | ||
| ptdump.c | ||
| trans_pgd.c | ||