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authorChristoffer Dall <christoffer.dall@linaro.org>2014-08-19 12:18:04 +0200
committerChristoffer Dall <christoffer.dall@linaro.org>2014-08-27 22:46:09 +0200
commit98047888bb9fd57734028c44ec17413ddd623958 (patch)
tree976048e835e2f88df23b73aad4e0591102ab8c6e /arch/arm64/include/uapi
parent64d831269ccbca1fc6d739a0f3c8aa24afb43a5e (diff)
downloadlinux-98047888bb9fd57734028c44ec17413ddd623958.tar.gz
arm/arm64: KVM: Support KVM_CAP_READONLY_MEM
When userspace loads code and data in a read-only memory regions, KVM needs to be able to handle this on arm and arm64. Specifically this is used when running code directly from a read-only flash device; the common scenario is a UEFI blob loaded with the -bios option in QEMU. Note that the MMIO exit on writes to a read-only memory is ABI and can be used to emulate block-erase style flash devices. Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm64/include/uapi')
-rw-r--r--arch/arm64/include/uapi/asm/kvm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h
index e633ff8cdec8..f4ec5a674d05 100644
--- a/arch/arm64/include/uapi/asm/kvm.h
+++ b/arch/arm64/include/uapi/asm/kvm.h
@@ -37,6 +37,7 @@
#define __KVM_HAVE_GUEST_DEBUG
#define __KVM_HAVE_IRQ_LINE
+#define __KVM_HAVE_READONLY_MEM
#define KVM_REG_SIZE(id) \
(1U << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))