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Change those mappings back to >>> be unencrypted. >>> >>> Cc: Lucas De Marchi >>> Fixes: 27dff0f58bde ("x86/mm: Nuke PAGE_KERNEL_IO") >>> Signed-off-by: Joerg Roedel >> >> oops, missed the fact PAGE_KERNEL had `| ENC` while PAGE_KERENL_IO >> didn't have it. Thanks for the fixup. > > on a second thought, the fact that PAGE_KERNEL is _not_ the same as > PAGE_KERNEL_IO, completely invalidates those 2 patches I sent. It seems > I screwed it up big here. > > About the first patch, > 6b2a2138cf36 ("drm/i915/gem: Stop using PAGE_KERNEL_IO"), > I didn't notice any regression on the i915 > side though. Is it safe to keep it? Otherwise we are probably better > off reverting everything. > > I'm wondering why the addition of memory encryption > in 21729f81ce8a ("x86/mm: Provide general kernel support for memory > encryption") > didn't break io_mapping_init_wc() though as it had already done a > s/PAGE_KERNEL_IO/PAGE_KERNEL/ in commit > ac96b5566926 ("io-mapping.h: s/PAGE_KERNEL_IO/PAGE_KERNEL/") If I follow it correctly, since SME/SEV-ES are X86_64 only, io_mapping_init_wc() takes the ioremap_wc() path which uses PAGE_KERNEL_IO. iomap_create_wc() is only called when CONFIG_HAVE_ATOMIC_IOMAP is set, which isn't set for X86_64. Thanks, Tom > > thanks > Lucas De Marchi > >> >> Reviewed-by: Lucas De Marchi >> >> Lucas De Marchi >> >>> --- >>> arch/x86/include/asm/fixmap.h        |  2 +- >>> arch/x86/include/asm/pgtable_types.h | 21 +++++++++++---------- >>> arch/x86/mm/ioremap.c                |  2 +- >>> 3 files changed, 13 insertions(+), 12 deletions(-) >>> >>> diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h >>> index 5e186a69db10..a2eaf265f784 100644 >>> --- a/arch/x86/include/asm/fixmap.h >>> +++ b/arch/x86/include/asm/fixmap.h >>> @@ -173,7 +173,7 @@ static inline void __set_fixmap(enum >>> fixed_addresses idx, >>> * supported for MMIO addresses, so make sure that the memory encryption >>> * mask is not part of the page attributes. >>> */ >>> -#define FIXMAP_PAGE_NOCACHE PAGE_KERNEL_NOCACHE >>> +#define FIXMAP_PAGE_NOCACHE PAGE_KERNEL_NOCACHE_NOENC >>> >>> /* >>> * Early memremap routines used for in-place encryption. The mappings >>> created >>> diff --git a/arch/x86/include/asm/pgtable_types.h >>> b/arch/x86/include/asm/pgtable_types.h >>> index a87224767ff3..fc9b6995cb22 100644 >>> --- a/arch/x86/include/asm/pgtable_types.h >>> +++ b/arch/x86/include/asm/pgtable_types.h >>> @@ -208,16 +208,17 @@ enum page_cache_mode { >>> >>> #define __pgprot_mask(x)    __pgprot((x) & __default_kernel_pte_mask) >>> >>> -#define PAGE_KERNEL        __pgprot_mask(__PAGE_KERNEL            | _ENC) >>> -#define PAGE_KERNEL_NOENC    __pgprot_mask(__PAGE_KERNEL >>> |    0) >>> -#define PAGE_KERNEL_RO        __pgprot_mask(__PAGE_KERNEL_RO         | >>> _ENC) >>> -#define PAGE_KERNEL_EXEC    __pgprot_mask(__PAGE_KERNEL_EXEC       | >>> _ENC) >>> -#define PAGE_KERNEL_EXEC_NOENC >>> __pgprot_mask(__PAGE_KERNEL_EXEC       |    0) >>> -#define PAGE_KERNEL_ROX        __pgprot_mask(__PAGE_KERNEL_ROX >>> | _ENC) >>> -#define PAGE_KERNEL_NOCACHE    __pgprot_mask(__PAGE_KERNEL_NOCACHE >>> | _ENC) >>> -#define PAGE_KERNEL_LARGE    __pgprot_mask(__PAGE_KERNEL_LARGE      | >>> _ENC) >>> -#define PAGE_KERNEL_LARGE_EXEC >>> __pgprot_mask(__PAGE_KERNEL_LARGE_EXEC | _ENC) >>> -#define PAGE_KERNEL_VVAR    __pgprot_mask(__PAGE_KERNEL_VVAR       | >>> _ENC) >>> +#define PAGE_KERNEL            __pgprot_mask(__PAGE_KERNEL >>> | _ENC) >>> +#define PAGE_KERNEL_NOENC >>> __pgprot_mask(__PAGE_KERNEL            |    0) >>> +#define PAGE_KERNEL_RO >>> __pgprot_mask(__PAGE_KERNEL_RO         | _ENC) >>> +#define PAGE_KERNEL_EXEC        __pgprot_mask(__PAGE_KERNEL_EXEC >>> | _ENC) >>> +#define PAGE_KERNEL_EXEC_NOENC >>> __pgprot_mask(__PAGE_KERNEL_EXEC       |    0) >>> +#define PAGE_KERNEL_ROX >>> __pgprot_mask(__PAGE_KERNEL_ROX        | _ENC) >>> +#define PAGE_KERNEL_NOCACHE >>> __pgprot_mask(__PAGE_KERNEL_NOCACHE    | _ENC) >>> +#define PAGE_KERNEL_NOCACHE_NOENC >>> __pgprot_mask(__PAGE_KERNEL_NOCACHE    |    0) >>> +#define PAGE_KERNEL_LARGE >>> __pgprot_mask(__PAGE_KERNEL_LARGE      | _ENC) >>> +#define PAGE_KERNEL_LARGE_EXEC >>> __pgprot_mask(__PAGE_KERNEL_LARGE_EXEC | _ENC) >>> +#define PAGE_KERNEL_VVAR        __pgprot_mask(__PAGE_KERNEL_VVAR >>> | _ENC) >>> >>> #endif    /* __ASSEMBLY__ */ >>> >>> diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c >>> index 3102dda4b152..4fe8d43d53bb 100644 >>> --- a/arch/x86/mm/ioremap.c >>> +++ b/arch/x86/mm/ioremap.c >>> @@ -243,7 +243,7 @@ __ioremap_caller(resource_size_t phys_addr, >>> unsigned long size, >>>      * make sure the memory encryption attribute is enabled in the >>>      * resulting mapping. >>>      */ >>> -    prot = PAGE_KERNEL; >>> +    prot = PAGE_KERNEL_NOENC; >>>     if ((io_desc.flags & IORES_MAP_ENCRYPTED) || encrypted) >>>         prot = pgprot_encrypted(prot); >>> >>> -- >>> 2.34.0 >>>