diff options
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/handle_exit.c | 14 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp/entry.S | 13 |
2 files changed, 26 insertions, 1 deletions
diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c index 6a5a5db..c09fc5a 100644 --- a/arch/arm64/kvm/handle_exit.c +++ b/arch/arm64/kvm/handle_exit.c @@ -23,6 +23,7 @@ #include <linux/kvm_host.h> #include <asm/esr.h> +#include <asm/exception.h> #include <asm/kvm_asm.h> #include <asm/kvm_coproc.h> #include <asm/kvm_emulate.h> @@ -249,7 +250,6 @@ int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, *vcpu_pc(vcpu) -= adj; } - kvm_inject_vabt(vcpu); return 1; } @@ -286,6 +286,18 @@ int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, void handle_exit_early(struct kvm_vcpu *vcpu, struct kvm_run *run, int exception_index) { + if (ARM_SERROR_PENDING(exception_index)) { + if (this_cpu_has_cap(ARM64_HAS_RAS_EXTN)) { + u64 disr = kvm_vcpu_get_disr(vcpu); + + kvm_handle_guest_serror(vcpu, disr_to_esr(disr)); + } else { + kvm_inject_vabt(vcpu); + } + + return; + } + exception_index = ARM_EXCEPTION_CODE(exception_index); if (exception_index == ARM_EXCEPTION_EL1_SERROR) diff --git a/arch/arm64/kvm/hyp/entry.S b/arch/arm64/kvm/hyp/entry.S index fe4678f..fdd1068 100644 --- a/arch/arm64/kvm/hyp/entry.S +++ b/arch/arm64/kvm/hyp/entry.S @@ -124,6 +124,17 @@ ENTRY(__guest_exit) // Now restore the host regs restore_callee_saved_regs x2 +alternative_if ARM64_HAS_RAS_EXTN + // If we have the RAS extensions we can consume a pending error + // without an unmask-SError and isb. + esb + mrs_s x2, SYS_DISR_EL1 + str x2, [x1, #(VCPU_FAULT_DISR - VCPU_CONTEXT)] + cbz x2, 1f + msr_s SYS_DISR_EL1, xzr + orr x0, x0, #(1<<ARM_EXIT_WITH_SERROR_BIT) +1: ret +alternative_else // If we have a pending asynchronous abort, now is the // time to find out. From your VAXorcist book, page 666: // "Threaten me not, oh Evil one! For I speak with @@ -134,7 +145,9 @@ ENTRY(__guest_exit) mov x5, x0 dsb sy // Synchronize against in-flight ld/st + nop msr daifclr, #4 // Unmask aborts +alternative_endif // This is our single instruction exception window. A pending // SError is guaranteed to occur at the earliest when we unmask |
