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| author | Marc Zyngier <marc.zyngier@arm.com> | 2016-06-13 15:00:48 +0100 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2016-06-29 14:01:34 +0200 |
| commit | 5900270550cbb8a272bfc248b69531cd44dcf0d5 (patch) | |
| tree | 9683a4f7757d6e45d58302b4d950ac3df703dbad /arch/arm64/include/asm/pgtable-prot.h | |
| parent | 74a6b8885f7026e33f8a4776b7ac17c76b8e5a52 (diff) | |
| download | linux-5900270550cbb8a272bfc248b69531cd44dcf0d5.tar.bz2 | |
arm/arm64: KVM: Map the HYP text as read-only
There should be no reason for mapping the HYP text read/write.
As such, let's have a new set of flags (PAGE_HYP_EXEC) that allows
execution, but makes the page as read-only, and update the two call
sites that deal with mapping code.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm64/include/asm/pgtable-prot.h')
| -rw-r--r-- | arch/arm64/include/asm/pgtable-prot.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable-prot.h b/arch/arm64/include/asm/pgtable-prot.h index 88db58cac587..380204847c20 100644 --- a/arch/arm64/include/asm/pgtable-prot.h +++ b/arch/arm64/include/asm/pgtable-prot.h @@ -56,6 +56,7 @@ #define PAGE_KERNEL_EXEC_CONT __pgprot(_PAGE_DEFAULT | PTE_UXN | PTE_DIRTY | PTE_WRITE | PTE_CONT) #define PAGE_HYP __pgprot(_PAGE_DEFAULT | PTE_HYP) +#define PAGE_HYP_EXEC __pgprot(_PAGE_DEFAULT | PTE_HYP | PTE_RDONLY) #define PAGE_HYP_RO __pgprot(_PAGE_DEFAULT | PTE_HYP | PTE_RDONLY | PTE_HYP_XN) #define PAGE_HYP_DEVICE __pgprot(PROT_DEVICE_nGnRE | PTE_HYP) |