From 3d4247fcc938d0ab5cf6fdb752dae07fdeab9736 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Tue, 14 Jan 2020 17:54:00 +0000 Subject: powerpc/32: Add support of KASAN_VMALLOC Add support of KASAN_VMALLOC on PPC32. To allow this, the early shadow covering the VMALLOC space need to be removed once high_memory var is set and before freeing memblock. And the VMALLOC area need to be aligned such that boundaries are covered by a full shadow page. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/031dec5487bde9b2181c8b3c9800e1879cf98c1a.1579024426.git.christophe.leroy@c-s.fr --- arch/powerpc/include/asm/book3s/32/pgtable.h | 5 +++++ arch/powerpc/include/asm/kasan.h | 2 ++ arch/powerpc/include/asm/nohash/32/pgtable.h | 5 +++++ 3 files changed, 12 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/book3s/32/pgtable.h b/arch/powerpc/include/asm/book3s/32/pgtable.h index 0796533d37dd..5b39c11e884a 100644 --- a/arch/powerpc/include/asm/book3s/32/pgtable.h +++ b/arch/powerpc/include/asm/book3s/32/pgtable.h @@ -193,7 +193,12 @@ int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot); #else #define VMALLOC_START ((((long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))) #endif + +#ifdef CONFIG_KASAN_VMALLOC +#define VMALLOC_END _ALIGN_DOWN(ioremap_bot, PAGE_SIZE << KASAN_SHADOW_SCALE_SHIFT) +#else #define VMALLOC_END ioremap_bot +#endif #ifndef __ASSEMBLY__ #include diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h index 296e51c2f066..fbff9ff9032e 100644 --- a/arch/powerpc/include/asm/kasan.h +++ b/arch/powerpc/include/asm/kasan.h @@ -31,9 +31,11 @@ void kasan_early_init(void); void kasan_mmu_init(void); void kasan_init(void); +void kasan_late_init(void); #else static inline void kasan_init(void) { } static inline void kasan_mmu_init(void) { } +static inline void kasan_late_init(void) { } #endif #endif /* __ASSEMBLY */ diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h index 552b96eef0c8..60c4d829152e 100644 --- a/arch/powerpc/include/asm/nohash/32/pgtable.h +++ b/arch/powerpc/include/asm/nohash/32/pgtable.h @@ -114,7 +114,12 @@ int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot); #else #define VMALLOC_START ((((long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))) #endif + +#ifdef CONFIG_KASAN_VMALLOC +#define VMALLOC_END _ALIGN_DOWN(ioremap_bot, PAGE_SIZE << KASAN_SHADOW_SCALE_SHIFT) +#else #define VMALLOC_END ioremap_bot +#endif /* * Bits in a linux-style PTE. These match the bits in the -- cgit