Messages in this thread Patch in this message | | | From | Julien Grall <> | Subject | [PATCH 1/8] arm/xen: Remove helpers which are PV specific | Date | Tue, 28 Jul 2015 16:02:42 +0100 |
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ARM guests are assimilated to HVM guest on ARM. The current implementation is assuming a 1:1 mapping which is only true for DOM0 and may not be at all in the future.
Furthermore, all the helpers but arbitrary_virt_to_machine are used in x86 specific code (or only compiled for).
The helper arbitrary_virt_to_machine is only used in PV specific code. Therefore we should never call the function.
Add a BUG() in this helper and drop all the others.
Signed-off-by: Julien Grall <julien.grall@citrix.com> Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: linux-arm-kernel@lists.infradead.org --- arch/arm/include/asm/xen/page.h | 16 ++-------------- 1 file changed, 2 insertions(+), 14 deletions(-)
diff --git a/arch/arm/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h index 1bee8ca..c2e9dcd 100644 --- a/arch/arm/include/asm/xen/page.h +++ b/arch/arm/include/asm/xen/page.h @@ -54,26 +54,14 @@ static inline unsigned long mfn_to_pfn(unsigned long mfn) #define mfn_to_local_pfn(mfn) mfn_to_pfn(mfn) -static inline xmaddr_t phys_to_machine(xpaddr_t phys) -{ - unsigned offset = phys.paddr & ~PAGE_MASK; - return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys.paddr))) | offset); -} - -static inline xpaddr_t machine_to_phys(xmaddr_t machine) -{ - unsigned offset = machine.maddr & ~PAGE_MASK; - return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset); -} /* VIRT <-> MACHINE conversion */ -#define virt_to_machine(v) (phys_to_machine(XPADDR(__pa(v)))) #define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v))) #define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT)) +/* Only used in PV code. However ARM guest is always assimilated as HVM. */ static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr) { - /* TODO: assuming it is mapped in the kernel 1:1 */ - return virt_to_machine(vaddr); + BUG(); } /* TODO: this shouldn't be here but it is because the frontend drivers -- 2.1.4
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