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arm/arm64: KVM: Make default HYP mappings non-excutable
Structures that can be generally written to don't have any requirement to be executable (quite the opposite). This includes the kvm and vcpu structures, as well as the stacks. Let's change the default to incorporate the XN flag. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
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5900270550
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arch
@ -97,7 +97,7 @@ extern pgprot_t pgprot_s2_device;
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#define PAGE_READONLY_EXEC _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_RDONLY)
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#define PAGE_KERNEL _MOD_PROT(pgprot_kernel, L_PTE_XN)
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#define PAGE_KERNEL_EXEC pgprot_kernel
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#define PAGE_HYP _MOD_PROT(pgprot_kernel, L_PTE_HYP)
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#define PAGE_HYP _MOD_PROT(pgprot_kernel, L_PTE_HYP | L_PTE_XN)
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#define PAGE_HYP_EXEC _MOD_PROT(pgprot_kernel, L_PTE_HYP | L_PTE_RDONLY)
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#define PAGE_HYP_RO _MOD_PROT(pgprot_kernel, L_PTE_HYP | L_PTE_RDONLY | L_PTE_XN)
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#define PAGE_HYP_DEVICE _MOD_PROT(pgprot_hyp_device, L_PTE_HYP)
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@ -55,7 +55,7 @@
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#define PAGE_KERNEL_EXEC __pgprot(_PAGE_DEFAULT | PTE_UXN | PTE_DIRTY | PTE_WRITE)
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#define PAGE_KERNEL_EXEC_CONT __pgprot(_PAGE_DEFAULT | PTE_UXN | PTE_DIRTY | PTE_WRITE | PTE_CONT)
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#define PAGE_HYP __pgprot(_PAGE_DEFAULT | PTE_HYP)
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#define PAGE_HYP __pgprot(_PAGE_DEFAULT | PTE_HYP | PTE_HYP_XN)
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#define PAGE_HYP_EXEC __pgprot(_PAGE_DEFAULT | PTE_HYP | PTE_RDONLY)
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#define PAGE_HYP_RO __pgprot(_PAGE_DEFAULT | PTE_HYP | PTE_RDONLY | PTE_HYP_XN)
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#define PAGE_HYP_DEVICE __pgprot(PROT_DEVICE_nGnRE | PTE_HYP)
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