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[v3,18/22] arm64: KVM: Map the kernel RO section into HYP

Message ID 1449485618-9443-19-git-send-email-marc.zyngier@arm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Marc Zyngier Dec. 7, 2015, 10:53 a.m. UTC 
In order to run C code in HYP, we must make sure that the kernel's
RO section is mapped into HYP (otherwise things break badly).

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
---
 arch/arm/kvm/arm.c | 7 +++++++
 1 file changed, 7 insertions(+)
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Patch

diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index e06fd29..d80aefe 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -44,6 +44,7 @@ 
 #include <asm/kvm_emulate.h>
 #include <asm/kvm_coproc.h>
 #include <asm/kvm_psci.h>
+#include <asm/sections.h>
 
 #ifdef REQUIRES_VIRT
 __asm__(".arch_extension	virt");
@@ -1067,6 +1068,12 @@  static int init_hyp_mode(void)
 		goto out_free_mappings;
 	}
 
+	err = create_hyp_mappings(__start_rodata, __end_rodata);
+	if (err) {
+		kvm_err("Cannot map rodata section\n");
+		goto out_free_mappings;
+	}
+
 	/*
 	 * Map the Hyp stack pages
 	 */