From: Takuya Yoshikawa Date: Thu, 30 Jun 2011 16:37:24 +0000 (+0900) Subject: KVM: MMU: Introduce is_last_gpte() to clean up walk_addr_generic() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3c8c652ae4c984a950d0672597085db866509914;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git KVM: MMU: Introduce is_last_gpte() to clean up walk_addr_generic() Suggested by Ingo and Avi. Cc: Ingo Molnar Signed-off-by: Takuya Yoshikawa Signed-off-by: Marcelo Tosatti --- diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index 9c0afba1ab8e..1e1c2444cef5 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -113,6 +113,24 @@ static unsigned FNAME(gpte_access)(struct kvm_vcpu *vcpu, pt_element_t gpte) return access; } +static bool FNAME(is_last_gpte)(struct guest_walker *walker, + struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, + pt_element_t gpte) +{ + if (walker->level == PT_PAGE_TABLE_LEVEL) + return true; + + if ((walker->level == PT_DIRECTORY_LEVEL) && is_large_pte(gpte) && + (PTTYPE == 64 || is_pse(vcpu))) + return true; + + if ((walker->level == PT_PDPE_LEVEL) && is_large_pte(gpte) && + (mmu->root_level == PT64_ROOT_LEVEL)) + return true; + + return false; +} + /* * Fetch a guest pte for a guest virtual address */ @@ -221,13 +239,7 @@ retry_walk: walker->ptes[walker->level - 1] = pte; - if ((walker->level == PT_PAGE_TABLE_LEVEL) || - ((walker->level == PT_DIRECTORY_LEVEL) && - is_large_pte(pte) && - (PTTYPE == 64 || is_pse(vcpu))) || - ((walker->level == PT_PDPE_LEVEL) && - is_large_pte(pte) && - mmu->root_level == PT64_ROOT_LEVEL)) { + if (FNAME(is_last_gpte)(walker, vcpu, mmu, pte)) { int lvl = walker->level; gpa_t real_gpa; gfn_t gfn;