VSESR_EL3

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.

Configuration

This register is present only when FEAT_E3DSE is implemented. Otherwise, direct accesses to VSESR_EL3 are UNDEFINED.

Attributes

Field descriptions

Bits [63:25]

IDS, bit [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.

The reset behavior of this field is:

On a Warm reset, this field resets to an architecturally UNKNOWN value.

ISS, bits [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.

The reset behavior of this field is:

On a Warm reset, this field resets to an architecturally UNKNOWN value.

Accessing VSESR_EL3

Accesses to this register use the following encodings in the System register encoding space:

MRS <Xt>, VSESR_EL3

op0	op1	CRn	CRm	op2
0b11	0b110	0b0101	0b0010	0b011

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then UNDEFINED; elsif PSTATE.EL == EL2 then UNDEFINED; elsif PSTATE.EL == EL3 then X[t, 64] = VSESR_EL3;

MSR VSESR_EL3, <Xt>

op0	op1	CRn	CRm	op2
0b11	0b110	0b0101	0b0010	0b011

if 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[t, 64];

63	62	61	60	59	58	57	56	55	54	53	52	51	50	49	48	47	46	45	44	43	42	41	40	39	38	37	36	35	34	33	32
31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
RES0
RES0							IDS	ISS

VSESR_EL3, Virtual SError Exception Syndrome Register (EL3)

Purpose