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powerpc/mm: rework io-workaround invocation.

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ppc_md.ioremap() is only used for I/O workaround on CELL platform,
so indirect function call can be avoided.

This patch reworks the io-workaround and ioremap() functions to
use the global 'io_workaround_inited' flag for the activation
of io-workaround.

When CONFIG_PPC_IO_WORKAROUNDS or CONFIG_PPC_INDIRECT_MMIO are not
selected, the I/O workaround ioremap() voids and the global flag is
not used.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/5fa3ef069fbd0f152512afaae19e7a60161454cf.1566309262.git.christophe.leroy@c-s.fr
This commit is contained in:
Christophe Leroy
2019-08-20 14:07:13 +00:00
committed by Michael Ellerman
parent 492643e81e
commit 14b4d97669
4 changed files with 34 additions and 18 deletions
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17
arch/powerpc/mm/pgtable_64.c
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@@ -35,6 +35,7 @@
#include <asm/page.h>
#include <asm/prom.h>
#include <asm/io.h>
#include <asm/io-workarounds.h>
#include <asm/mmu_context.h>
#include <asm/pgtable.h>
#include <asm/mmu.h>
@@ -208,8 +209,8 @@ void __iomem * ioremap(phys_addr_t addr, unsigned long size)
pgprot_t prot = pgprot_noncached(PAGE_KERNEL);
void *caller = __builtin_return_address(0);
if (ppc_md.ioremap)
return ppc_md.ioremap(addr, size, prot, caller);
if (iowa_is_active())
return iowa_ioremap(addr, size, prot, caller);
return __ioremap_caller(addr, size, prot, caller);
}
@@ -218,8 +219,8 @@ void __iomem * ioremap_wc(phys_addr_t addr, unsigned long size)
pgprot_t prot = pgprot_noncached_wc(PAGE_KERNEL);
void *caller = __builtin_return_address(0);
if (ppc_md.ioremap)
return ppc_md.ioremap(addr, size, prot, caller);
if (iowa_is_active())
return iowa_ioremap(addr, size, prot, caller);
return __ioremap_caller(addr, size, prot, caller);
}
@@ -228,8 +229,8 @@ void __iomem *ioremap_coherent(phys_addr_t addr, unsigned long size)
pgprot_t prot = pgprot_cached(PAGE_KERNEL);
void *caller = __builtin_return_address(0);
if (ppc_md.ioremap)
return ppc_md.ioremap(addr, size, prot, caller);
if (iowa_is_active())
return iowa_ioremap(addr, size, prot, caller);
return __ioremap_caller(addr, size, prot, caller);
}
@@ -250,8 +251,8 @@ void __iomem * ioremap_prot(phys_addr_t addr, unsigned long size,
*/
pte = pte_mkprivileged(pte);
if (ppc_md.ioremap)
return ppc_md.ioremap(addr, size, pte_pgprot(pte), caller);
if (iowa_is_active())
return iowa_ioremap(addr, size, pte_pgprot(pte), caller);
return __ioremap_caller(addr, size, pte_pgprot(pte), caller);
}