On Wed, May 08, 2019 at 05:43:39PM +0300, Kirill A. Shutemov wrote: > Per-KeyID direct mappings require changes into how we find the right > virtual address for a page and virt-to-phys address translations. > > page_to_virt() definition overwrites default macros provided by > <linux/mm.h>. > > Signed-off-by: Kirill A. Shutemov <[email protected]> > --- > arch/x86/include/asm/page.h | 3 +++ > arch/x86/include/asm/page_64.h | 2 +- > 2 files changed, 4 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/include/asm/page.h b/arch/x86/include/asm/page.h > index 39af59487d5f..aff30554f38e 100644 > --- a/arch/x86/include/asm/page.h > +++ b/arch/x86/include/asm/page.h > @@ -72,6 +72,9 @@ static inline void copy_user_page(void *to, void *from, > unsigned long vaddr, > extern bool __virt_addr_valid(unsigned long kaddr); > #define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) > (kaddr)) > > +#define page_to_virt(x) \ > + (__va(PFN_PHYS(page_to_pfn(x))) + page_keyid(x) * direct_mapping_size) > + > #endif /* __ASSEMBLY__ */
So this is the bit that makes patch 13 make sense. It would've been nice to have that called out in the Changelog or something.
