| Message ID | E1aviEu-0000ix-C1@rmk-PC.arm.linux.org.uk (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, Apr 28, 2016 at 2:58 PM, Russell King <rmk+kernel@arm.linux.org.uk> wrote: > Provide a helper to indicate whether we need to perform special handling > for boot identity mapping aliases or not. > > Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> > --- > arch/arm/include/asm/memory.h | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h > index ca208335fde6..31c07a2cc100 100644 > --- a/arch/arm/include/asm/memory.h > +++ b/arch/arm/include/asm/memory.h > @@ -295,6 +295,11 @@ extern long long arch_phys_to_idmap_offset; > * of physical memory for idmap purposes. Most cases should leave these > * untouched. Note: this can only return addresses less than 4GiB. > */ > +static inline bool arm_has_idmap_alias(void) > +{ > + return IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset != 0; > +} > + > #define IDMAP_INVALID_ADDR ((u32)~0) > > static inline unsigned long phys_to_idmap(phys_addr_t addr) Reviewed-by: Pratyush Anand <panand@redhat.com>
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h index ca208335fde6..31c07a2cc100 100644 --- a/arch/arm/include/asm/memory.h +++ b/arch/arm/include/asm/memory.h @@ -295,6 +295,11 @@ extern long long arch_phys_to_idmap_offset; * of physical memory for idmap purposes. Most cases should leave these * untouched. Note: this can only return addresses less than 4GiB. */ +static inline bool arm_has_idmap_alias(void) +{ + return IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset != 0; +} + #define IDMAP_INVALID_ADDR ((u32)~0) static inline unsigned long phys_to_idmap(phys_addr_t addr)
Provide a helper to indicate whether we need to perform special handling for boot identity mapping aliases or not. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> --- arch/arm/include/asm/memory.h | 5 +++++ 1 file changed, 5 insertions(+)