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In the case of HV_FIXED pages, this is not an > error situation where the surrounding 2MB page RMP entries can provide > debug information. > > Add new __snp_leak_pages() API with dump_rmp bool parameter to support > continue adding pages to the snp_leaked_pages_list but not issue > dump_rmpentry(). > > Make snp_leak_pages() a wrapper for the common case which also allows > existing users to continue to dump RMP entries. > > Suggested-by: Thomas Lendacky > Suggested-by: Sean Christopherson > Signed-off-by: Ashish Kalra Reviewed-by: Tom Lendacky > --- > arch/x86/include/asm/sev.h | 8 +++++++- > arch/x86/virt/svm/sev.c | 7 ++++--- > 2 files changed, 11 insertions(+), 4 deletions(-) > > diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h > index 00475b814ac4..7a1ae990b15f 100644 > --- a/arch/x86/include/asm/sev.h > +++ b/arch/x86/include/asm/sev.h > @@ -635,10 +635,15 @@ void snp_dump_hva_rmpentry(unsigned long address); > int psmash(u64 pfn); > int rmp_make_private(u64 pfn, u64 gpa, enum pg_level level, u32 asid, bool immutable); > int rmp_make_shared(u64 pfn, enum pg_level level); > -void snp_leak_pages(u64 pfn, unsigned int npages); > +void __snp_leak_pages(u64 pfn, unsigned int npages, bool dump_rmp); > void kdump_sev_callback(void); > void snp_fixup_e820_tables(void); > > +static inline void snp_leak_pages(u64 pfn, unsigned int pages) > +{ > + __snp_leak_pages(pfn, pages, true); > +} > + > static inline void sev_evict_cache(void *va, int npages) > { > volatile u8 val __always_unused; > @@ -668,6 +673,7 @@ static inline int rmp_make_private(u64 pfn, u64 gpa, enum pg_level level, u32 as > return -ENODEV; > } > static inline int rmp_make_shared(u64 pfn, enum pg_level level) { return -ENODEV; } > +static inline void __snp_leak_pages(u64 pfn, unsigned int npages, bool dump_rmp) {} > static inline void snp_leak_pages(u64 pfn, unsigned int npages) {} > static inline void kdump_sev_callback(void) { } > static inline void snp_fixup_e820_tables(void) {} > diff --git a/arch/x86/virt/svm/sev.c b/arch/x86/virt/svm/sev.c > index 942372e69b4d..ee643a6cd691 100644 > --- a/arch/x86/virt/svm/sev.c > +++ b/arch/x86/virt/svm/sev.c > @@ -1029,7 +1029,7 @@ int rmp_make_shared(u64 pfn, enum pg_level level) > } > EXPORT_SYMBOL_GPL(rmp_make_shared); > > -void snp_leak_pages(u64 pfn, unsigned int npages) > +void __snp_leak_pages(u64 pfn, unsigned int npages, bool dump_rmp) > { > struct page *page = pfn_to_page(pfn); > > @@ -1052,14 +1052,15 @@ void snp_leak_pages(u64 pfn, unsigned int npages) > (PageHead(page) && compound_nr(page) <= npages)) > list_add_tail(&page->buddy_list, &snp_leaked_pages_list); > > - dump_rmpentry(pfn); > + if (dump_rmp) > + dump_rmpentry(pfn); > snp_nr_leaked_pages++; > pfn++; > page++; > } > spin_unlock(&snp_leaked_pages_list_lock); > } > -EXPORT_SYMBOL_GPL(snp_leak_pages); > +EXPORT_SYMBOL_GPL(__snp_leak_pages); > > void kdump_sev_callback(void) > {