correct the commit message:
In the firmware-first RAS solution, OS receives an synchronous
external abort, then trapped to EL3 by SCR_EL3.EA. Firmware inspects
the HCR_EL2.TEA and chooses the target to send APEI's SEA notification.
If the SCR_EL3.EA is set, delegates the error exception to the hypervisor,
otherwise it delegates to the host OS kernel
On 2017/6/26 20:45, Dongjiu Geng wrote:
> In the firmware-first RAS solution, guest OS receives an synchronous
> external abort, then trapped to EL3 by SCR_EL3.EA. Firmware inspects
> the HCR_EL2.TEA and chooses the target to send APEI's SEA notification.
> If the SCR_EL3.EA is set, delegates the error exception to the hypervisor,
> otherwise it delegates to the guest OS kernel
>
> Signed-off-by: Dongjiu Geng <gengdongjiu@xxxxxxxxxx>
> ---
> arch/arm64/include/asm/kvm_arm.h | 2 ++
> arch/arm64/include/asm/kvm_emulate.h | 7 +++++++
> 2 files changed, 9 insertions(+)
>
> diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h
> index 61d694c..1188272 100644
> --- a/arch/arm64/include/asm/kvm_arm.h
> +++ b/arch/arm64/include/asm/kvm_arm.h
> @@ -23,6 +23,8 @@
> #include <asm/types.h>
>
> /* Hyp Configuration Register (HCR) bits */
> +#define HCR_TEA (UL(1) << 37)
> +#define HCR_TERR (UL(1) << 36)
> #define HCR_E2H (UL(1) << 34)
> #define HCR_ID (UL(1) << 33)
> #define HCR_CD (UL(1) << 32)
> diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
> index f5ea0ba..5f64ab2 100644
> --- a/arch/arm64/include/asm/kvm_emulate.h
> +++ b/arch/arm64/include/asm/kvm_emulate.h
> @@ -47,6 +47,13 @@ static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
> vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS;
> if (is_kernel_in_hyp_mode())
> vcpu->arch.hcr_el2 |= HCR_E2H;
> + if (cpus_have_const_cap(ARM64_HAS_RAS_EXTN)) {
> + /* route synchronous external abort exceptions to EL2 */
> + vcpu->arch.hcr_el2 |= HCR_TEA;
> + /* trap error record accesses */
> + vcpu->arch.hcr_el2 |= HCR_TERR;
> + }
> +
> if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features))
> vcpu->arch.hcr_el2 &= ~HCR_RW;
> }
>
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