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SFENCE.VMA should be illegal in user mode

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This commit is contained in:
David Harris 2022-05-05 15:15:02 +00:00
parent f436e93fc5
commit 7f42ff06d2
4 changed files with 11 additions and 11 deletions
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3
pipelined/src/privileged/csr.sv
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@ -57,7 +57,7 @@ module csr #(parameter
input logic [1:0] NextPrivilegeModeM, PrivilegeModeW,
input logic [`XLEN-1:0] CauseM, NextFaultMtvalM,
output logic [1:0] STATUS_MPP,
output logic STATUS_SPP, STATUS_TSR,
output logic STATUS_SPP, STATUS_TSR, STATUS_TVM,
output logic [`XLEN-1:0] MEPC_REGW, SEPC_REGW, STVEC_REGW, MTVEC_REGW,
output logic [`XLEN-1:0] MEDELEG_REGW,
output logic [`XLEN-1:0] SATP_REGW,
@ -86,7 +86,6 @@ module csr #(parameter
logic [31:0] MCOUNTINHIBIT_REGW, MCOUNTEREN_REGW, SCOUNTEREN_REGW;
logic WriteMSTATUSM, WriteSSTATUSM;
logic CSRMWriteM, CSRSWriteM, CSRUWriteM;
logic STATUS_TVM;
logic WriteFRMM, WriteFFLAGSM;
logic [`XLEN-1:0] UnalignedNextEPCM, NextEPCM, NextCauseM, NextMtvalM;

12
pipelined/src/privileged/privdec.sv
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@ -36,12 +36,12 @@ module privdec (
input logic PrivilegedM, IllegalIEUInstrFaultM, IllegalCSRAccessM, IllegalFPUInstrM,
input logic TrappedSRETM, WFITimeoutM,
input logic [1:0] PrivilegeModeW,
input logic STATUS_TSR,
input logic STATUS_TSR, STATUS_TVM,
input logic [1:0] STATUS_FS,
output logic IllegalInstrFaultM,
output logic sretM, mretM, ecallM, ebreakM, wfiM, sfencevmaM);
logic IllegalPrivilegedInstrM;
logic IllegalPrivilegedInstrM, IllegalOrDisabledFPUInstrM;
// xRET defined in Privileged Spect 3.2.2
assign sretM = PrivilegedM & (InstrM[31:20] == 12'b000100000010) & `S_SUPPORTED &
@ -51,8 +51,10 @@ module privdec (
assign ecallM = PrivilegedM & (InstrM[31:20] == 12'b000000000000);
assign ebreakM = PrivilegedM & (InstrM[31:20] == 12'b000000000001);
assign wfiM = PrivilegedM & (InstrM[31:20] == 12'b000100000101);
assign sfencevmaM = PrivilegedM & (InstrM[31:25] == 7'b0001001) & (PrivilegedModeW == `M_MODE | (PrivilegeModeW == `S_MODE & ~STATUS_TVM)); // *** does this work in U mode?
assign sfencevmaM = PrivilegedM & (InstrM[31:25] == 7'b0001001) &
(PrivilegeModeW == `M_MODE | (PrivilegeModeW == `S_MODE & ~STATUS_TVM));
assign IllegalPrivilegedInstrM = PrivilegedM & ~(sretM|mretM|ecallM|ebreakM|wfiM|sfencevmaM);
assign IllegalInstrFaultM = (IllegalIEUInstrFaultM & (IllegalFPUInstrM | (STATUS_FS == 2'b00))) | IllegalPrivilegedInstrM | IllegalCSRAccessM |
TrappedSRETM | WFITimeoutM; // *** generalize this for other instructions
assign IllegalOrDisabledFPUInstrM = IllegalFPUInstrM | (STATUS_FS == 2'b00);
assign IllegalInstrFaultM = (IllegalIEUInstrFaultM & IllegalOrDisabledFPUInstrM) | IllegalPrivilegedInstrM | IllegalCSRAccessM |
TrappedSRETM | WFITimeoutM;
endmodule

6
pipelined/src/privileged/privileged.sv
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@ -99,7 +99,7 @@ module privileged (
logic MTrapM, STrapM, UTrapM;
(* mark_debug = "true" *) logic InterruptM;
logic STATUS_SPP, STATUS_TSR, STATUS_TW;
logic STATUS_SPP, STATUS_TSR, STATUS_TW, STATUS_TVM;
logic STATUS_MIE, STATUS_SIE;
logic [11:0] MIP_REGW, MIE_REGW, SIP_REGW, SIE_REGW;
logic md;
@ -148,7 +148,7 @@ module privileged (
privdec pmd(.InstrM(InstrM[31:20]),
.PrivilegedM, .IllegalIEUInstrFaultM, .IllegalCSRAccessM, .IllegalFPUInstrM, .TrappedSRETM, .WFITimeoutM,
.PrivilegeModeW, .STATUS_TSR, .STATUS_FS, .IllegalInstrFaultM,
.PrivilegeModeW, .STATUS_TSR, .STATUS_TVM, .STATUS_FS, .IllegalInstrFaultM,
.sretM, .mretM, .ecallM, .ebreakM, .wfiM, .sfencevmaM);
///////////////////////////////////////////
@ -166,7 +166,7 @@ module privileged (
.BPPredClassNonCFIWrongM, .InstrClassM, .DCacheMiss, .DCacheAccess, .ICacheMiss, .ICacheAccess,
.NextPrivilegeModeM, .PrivilegeModeW,
.CauseM, .NextFaultMtvalM, .STATUS_MPP,
.STATUS_SPP, .STATUS_TSR,
.STATUS_SPP, .STATUS_TSR, .STATUS_TVM,
.MEPC_REGW, .SEPC_REGW, .STVEC_REGW, .MTVEC_REGW,
.MEDELEG_REGW,
.SATP_REGW,

1
pipelined/testbench/tests.vh
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@ -1483,7 +1483,6 @@ string imperas32f[] = '{
string wally32e[] = '{
`WALLYTEST,
"rv32i_m/I/E-beq-01", "03b010",
"rv32i_m/I/E-add-01", "005010",
"rv32i_m/I/E-addi-01", "004010",
"rv32i_m/I/E-and-01", "005010",