| Message ID | 1399997646-4716-10-git-send-email-victor.kamensky@linaro.org |
|---|---|
| State | New |
| Headers | show |
On 13/05/14 17:14, Victor Kamensky wrote: > In case of guest CPU running in LE mode and host runs in > BE mode we need byteswap data, so read/write is emulated correctly. > > Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org> > Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> > --- > arch/arm64/include/asm/kvm_emulate.h | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > > diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h > index dd8ecfc..fdc3e21 100644 > --- a/arch/arm64/include/asm/kvm_emulate.h > +++ b/arch/arm64/include/asm/kvm_emulate.h > @@ -213,6 +213,17 @@ static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu, > default: > return be64_to_cpu(data); > } > + } else { > + switch (len) { > + case 1: > + return data & 0xff; > + case 2: > + return le16_to_cpu(data & 0xffff); > + case 4: > + return le32_to_cpu(data & 0xffffffff); > + default: > + return le64_to_cpu(data); > + } > } > > return data; /* Leave LE untouched */ > @@ -233,6 +244,17 @@ static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu, > default: > return cpu_to_be64(data); > } > + } else { > + switch (len) { > + case 1: > + return data & 0xff; > + case 2: > + return cpu_to_le16(data & 0xffff); > + case 4: > + return cpu_to_le32(data & 0xffffffff); > + default: > + return cpu_to_le64(data); > + } > } > > return data; /* Leave LE untouched */ > Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> M.
diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h index dd8ecfc..fdc3e21 100644 --- a/arch/arm64/include/asm/kvm_emulate.h +++ b/arch/arm64/include/asm/kvm_emulate.h @@ -213,6 +213,17 @@ static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu, default: return be64_to_cpu(data); } + } else { + switch (len) { + case 1: + return data & 0xff; + case 2: + return le16_to_cpu(data & 0xffff); + case 4: + return le32_to_cpu(data & 0xffffffff); + default: + return le64_to_cpu(data); + } } return data; /* Leave LE untouched */ @@ -233,6 +244,17 @@ static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu, default: return cpu_to_be64(data); } + } else { + switch (len) { + case 1: + return data & 0xff; + case 2: + return cpu_to_le16(data & 0xffff); + case 4: + return cpu_to_le32(data & 0xffffffff); + default: + return cpu_to_le64(data); + } } return data; /* Leave LE untouched */