target-ppc: Introduce Privileged TM Noops
Add the supervisory Transactional Memory instructions treclaim. and trechkpt. The implementation is a degenerate one that simply checks privileged state, TM availability and then sets CR[0] to 0b0000, just like the unprivileged noops. Signed-off-by: Tom Musta <tommusta@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
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@ -9722,6 +9722,40 @@ static void gen_tcheck(DisasContext *ctx)
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tcg_gen_movi_i32(cpu_crf[crfD(ctx->opcode)], 0x8);
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}
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#if defined(CONFIG_USER_ONLY)
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#define GEN_TM_PRIV_NOOP(name) \
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static inline void gen_##name(DisasContext *ctx) \
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{ \
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gen_inval_exception(ctx, POWERPC_EXCP_PRIV_OPC); \
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}
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#else
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#define GEN_TM_PRIV_NOOP(name) \
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static inline void gen_##name(DisasContext *ctx) \
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{ \
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if (unlikely(ctx->pr)) { \
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gen_inval_exception(ctx, POWERPC_EXCP_PRIV_OPC); \
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return; \
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} \
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if (unlikely(!ctx->tm_enabled)) { \
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gen_exception_err(ctx, POWERPC_EXCP_FU, FSCR_IC_TM); \
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return; \
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} \
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/* Because tbegin always fails, the implementation is \
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* simple: \
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* \
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* CR[0] = 0b0 || MSR[TS] || 0b0 \
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* = 0b0 || 0b00 | 0b0 \
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*/ \
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tcg_gen_movi_i32(cpu_crf[0], 0); \
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}
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#endif
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GEN_TM_PRIV_NOOP(treclaim);
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GEN_TM_PRIV_NOOP(trechkpt);
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static opcode_t opcodes[] = {
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GEN_HANDLER(invalid, 0x00, 0x00, 0x00, 0xFFFFFFFF, PPC_NONE),
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GEN_HANDLER(cmp, 0x1F, 0x00, 0x00, 0x00400000, PPC_INTEGER),
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@ -11153,6 +11187,10 @@ GEN_HANDLER2_E(tsr, "tsr", 0x1F, 0x0E, 0x17, 0x03DFF800, \
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PPC_NONE, PPC2_TM),
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GEN_HANDLER2_E(tcheck, "tcheck", 0x1F, 0x0E, 0x16, 0x007FF800, \
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PPC_NONE, PPC2_TM),
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GEN_HANDLER2_E(treclaim, "treclaim", 0x1F, 0x0E, 0x1D, 0x03E0F800, \
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PPC_NONE, PPC2_TM),
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GEN_HANDLER2_E(trechkpt, "trechkpt", 0x1F, 0x0E, 0x1F, 0x03FFF800, \
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PPC_NONE, PPC2_TM),
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};
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#include "helper_regs.h"
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