From mboxrd@z Thu Jan 1 00:00:00 1970 From: santosh.shilimkar@ti.com (Santosh Shilimkar) Date: Tue, 19 Nov 2013 14:59:12 -0500 Subject: [RESEND PATCH v2] arm/arm64: kvm: Use virt_to_idmap instead of virt_to_phys for idmap mappings Message-ID: <1384891152-15990-1-git-send-email-santosh.shilimkar@ti.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org KVM initialisation fails on architectures implementing virt_to_idmap() because virt_to_phys() on such architectures won't fetch you the correct idmap page. So update the KVM ARM code to use the virt_to_idmap() to fix the issue. Since the KVM code is shared between arm and arm64, we create kvm_virt_to_phys() and handle the redirection in respective headers. Cc: Christoffer Dall Cc: Marc Zyngier Cc: Catalin Marinas Signed-off-by: Santosh Shilimkar --- Update the earlier version as per Marc's suggestion arch/arm/include/asm/kvm_mmu.h | 1 + arch/arm/kvm/mmu.c | 8 ++++---- arch/arm64/include/asm/kvm_mmu.h | 1 + 3 files changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h index 77de4a4..2d122ad 100644 --- a/arch/arm/include/asm/kvm_mmu.h +++ b/arch/arm/include/asm/kvm_mmu.h @@ -140,6 +140,7 @@ static inline void coherent_icache_guest_page(struct kvm *kvm, hva_t hva, } #define kvm_flush_dcache_to_poc(a,l) __cpuc_flush_dcache_area((a), (l)) +#define kvm_virt_to_phys(x) virt_to_idmap((unsigned long)(x)) #endif /* !__ASSEMBLY__ */ diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c index 5809069..659db0e 100644 --- a/arch/arm/kvm/mmu.c +++ b/arch/arm/kvm/mmu.c @@ -916,9 +916,9 @@ int kvm_mmu_init(void) { int err; - hyp_idmap_start = virt_to_phys(__hyp_idmap_text_start); - hyp_idmap_end = virt_to_phys(__hyp_idmap_text_end); - hyp_idmap_vector = virt_to_phys(__kvm_hyp_init); + hyp_idmap_start = kvm_virt_to_phys(__hyp_idmap_text_start); + hyp_idmap_end = kvm_virt_to_phys(__hyp_idmap_text_end); + hyp_idmap_vector = kvm_virt_to_phys(__kvm_hyp_init); if ((hyp_idmap_start ^ hyp_idmap_end) & PAGE_MASK) { /* @@ -945,7 +945,7 @@ int kvm_mmu_init(void) */ kvm_flush_dcache_to_poc(init_bounce_page, len); - phys_base = virt_to_phys(init_bounce_page); + phys_base = kvm_virt_to_phys(init_bounce_page); hyp_idmap_vector += phys_base - hyp_idmap_start; hyp_idmap_start = phys_base; hyp_idmap_end = phys_base + len; diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h index 680f74e..7f1f940 100644 --- a/arch/arm64/include/asm/kvm_mmu.h +++ b/arch/arm64/include/asm/kvm_mmu.h @@ -136,6 +136,7 @@ static inline void coherent_icache_guest_page(struct kvm *kvm, hva_t hva, } #define kvm_flush_dcache_to_poc(a,l) __flush_dcache_area((a), (l)) +#define kvm_virt_to_phys(x) __virt_to_phys((unsigned long)(x)) #endif /* __ASSEMBLY__ */ #endif /* __ARM64_KVM_MMU_H__ */ -- 1.7.9.5