VSESR_EL3 Virtual SError Exception Syndrome Register (EL3) when FEAT_E3DSE is implemented Provides the syndrome value reported to software when the Effective value of SCR_EL3.DSE is 1 on taking a delegated SError exception to EL2 or EL1, or on executing an ESB instruction at EL2 or EL1. When the delegated SError exception injected using SCR_EL3.DSE is taken to EL2 using AArch64, then the syndrome value is reported in ESR_EL2. When the delegated SError exception injected using SCR_EL3.DSE is taken to EL1 using AArch64, then the syndrome value is reported in ESR_EL1. When the delegated SError exception injected using SCR_EL3.DSE is deferred by an ESB instruction, then the syndrome value is written to VDISR_EL3. RAS VSESR_EL3 is a 64-bit register. 63 25 63:25 Reserved, RES0. IDS 24 24 24 When a delegated SError exception triggered by SCR_EL3.DSE is taken to EL2 or EL1 using AArch64, ESR_ELx[24] is set to VSESR_EL3.IDS. When a delegated SError exception triggered by SCR_EL3.DSE is deferred by an ESB instruction, VDISR_EL3[24] is set to VSESR_EL3.IDS. AU ISS 23 0 23:0 When a delegated SError exception triggered by SCR_EL3.DSE is taken to EL2 or EL1 using AArch64, ESR_ELx[23:0] is set to VSESR_EL3.ISS. When a delegated SError exception triggered by SCR_EL3.DSE is deferred by an ESB instruction, VDISR_EL3[23:0] is set to VSESR_EL3.ISS. AU MRS <Xt>, VSESR_EL3 if !IsFeatureImplemented(FEAT_E3DSE) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then Undefined(); elsif PSTATE.EL == EL2 then Undefined(); elsif PSTATE.EL == EL3 then X{64}(t) = VSESR_EL3(); end; MSR VSESR_EL3, <Xt> if !IsFeatureImplemented(FEAT_E3DSE) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then Undefined(); elsif PSTATE.EL == EL2 then Undefined(); elsif PSTATE.EL == EL3 then VSESR_EL3() = X{64}(t); end; 2026-03-26 20:27:25 2026-03_rel