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authorMarc Zyngier <marc.zyngier@arm.com>2016-06-13 15:00:47 +0100
committerChristoffer Dall <christoffer.dall@linaro.org>2016-06-29 13:59:14 +0200
commit74a6b8885f7026e33f8a4776b7ac17c76b8e5a52 (patch)
tree694666822483772f344c336ae04c8ee854d667c3 /arch/arm/kvm
parent1166f3fe6a86798e4fcd24cefb6b06da3fd0420f (diff)
downloadlinux-74a6b8885f7026e33f8a4776b7ac17c76b8e5a52.tar.bz2
arm/arm64: KVM: Enforce HYP read-only mapping of the kernel's rodata section
In order to be able to use C code in HYP, we're now mapping the kernel's rodata in HYP. It works absolutely fine, except that we're mapping it RWX, which is not what it should be. Add a new HYP_PAGE_RO protection, and pass it as the protection flags when mapping the rodata section. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm/kvm')
-rw-r--r--arch/arm/kvm/arm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 45dd6df70cdf..b30897679e53 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -1300,7 +1300,7 @@ static int init_hyp_mode(void)
}
err = create_hyp_mappings(kvm_ksym_ref(__start_rodata),
- kvm_ksym_ref(__end_rodata), PAGE_HYP);
+ kvm_ksym_ref(__end_rodata), PAGE_HYP_RO);
if (err) {
kvm_err("Cannot map rodata section\n");
goto out_err;