MIPS: uasm: Add MTHI/MTLO instructions

Add MTHI/MTLO instructions for writing to the hi & lo registers to uasm
so that KVM can use uasm for generating its entry point code at runtime.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

5 files changed, 16 insertions, 5 deletions

diff --git a/arch/mips/include/asm/uasm.h b/arch/mips/include/asm/uasm.h
index 4af8a5becbbb..f7929f65f7ca 100644
--- a/arch/mips/include/asm/uasm.h
+++ b/arch/mips/include/asm/uasm.h
@@ -146,6 +146,8 @@ Ip_u1(_mfhi);
 Ip_u1(_mflo);
 Ip_u1u2u3(_mtc0);
 Ip_u1u2u3(_mthc0);
+Ip_u1(_mthi);
+Ip_u1(_mtlo);
 Ip_u3u1u2(_mul);
 Ip_u3u1u2(_or);
 Ip_u2u1u3(_ori);
diff --git a/arch/mips/include/uapi/asm/inst.h b/arch/mips/include/uapi/asm/inst.h
index 7010d0b7b752..6319c5037e66 100644
--- a/arch/mips/include/uapi/asm/inst.h
+++ b/arch/mips/include/uapi/asm/inst.h
@@ -375,7 +375,9 @@ enum mm_32axf_minor_op {
         mm_mflo32_op = 0x075,
         mm_jalrhb_op = 0x07c,
         mm_tlbwi_op = 0x08d,
+        mm_mthi32_op = 0x0b5,
         mm_tlbwr_op = 0x0cd,
+        mm_mtlo32_op = 0x0f5,
         mm_di_op = 0x11d,
         mm_jalrs_op = 0x13c,
         mm_jalrshb_op = 0x17c,
diff --git a/arch/mips/mm/uasm-micromips.c b/arch/mips/mm/uasm-micromips.c
index 40bef28f192c..277cf52d80e1 100644
--- a/arch/mips/mm/uasm-micromips.c
+++ b/arch/mips/mm/uasm-micromips.c
@@ -89,6 +89,8 @@ static struct insn insn_table_MM[] = {
         { insn_mfhi, M(mm_pool32a_op, 0, 0, 0, mm_mfhi32_op, mm_pool32axf_op), RS },
         { insn_mflo, M(mm_pool32a_op, 0, 0, 0, mm_mflo32_op, mm_pool32axf_op), RS },
         { insn_mtc0, M(mm_pool32a_op, 0, 0, 0, mm_mtc0_op, mm_pool32axf_op), RT | RS | RD },
+        { insn_mthi, M(mm_pool32a_op, 0, 0, 0, mm_mthi32_op, mm_pool32axf_op), RS },
+        { insn_mtlo, M(mm_pool32a_op, 0, 0, 0, mm_mtlo32_op, mm_pool32axf_op), RS },
         { insn_mul, M(mm_pool32a_op, 0, 0, 0, 0, mm_mul_op), RT | RS | RD },
         { insn_or, M(mm_pool32a_op, 0, 0, 0, 0, mm_or32_op), RT | RS | RD },
         { insn_ori, M(mm_ori32_op, 0, 0, 0, 0, 0), RT | RS | UIMM },
diff --git a/arch/mips/mm/uasm-mips.c b/arch/mips/mm/uasm-mips.c
index 2b7d85b8241f..86a3c76a1ad8 100644
--- a/arch/mips/mm/uasm-mips.c
+++ b/arch/mips/mm/uasm-mips.c
@@ -119,6 +119,8 @@ static struct insn insn_table[] = {
         { insn_mflo,  M(spec_op, 0, 0, 0, 0, mflo_op), RD },
         { insn_mtc0,  M(cop0_op, mtc_op, 0, 0, 0, 0),  RT | RD | SET},
         { insn_mthc0,  M(cop0_op, mthc0_op, 0, 0, 0, 0),  RT | RD | SET},
+        { insn_mthi,  M(spec_op, 0, 0, 0, 0, mthi_op), RS },
+        { insn_mtlo,  M(spec_op, 0, 0, 0, 0, mtlo_op), RS },
         { insn_mul, M(spec2_op, 0, 0, 0, 0, mul_op), RS | RT | RD},
         { insn_ori,  M(ori_op, 0, 0, 0, 0, 0),  RS | RT | UIMM },
         { insn_or,  M(spec_op, 0, 0, 0, 0, or_op),  RS | RT | RD },
diff --git a/arch/mips/mm/uasm.c b/arch/mips/mm/uasm.c
index 006fb05b74a7..3e0282d301d6 100644
--- a/arch/mips/mm/uasm.c
+++ b/arch/mips/mm/uasm.c
@@ -56,11 +56,12 @@ enum opcode {
         insn_ext, insn_ins, insn_j, insn_jal, insn_jalr, insn_jr, insn_lb,
         insn_ld, insn_ldx, insn_lh, insn_ll, insn_lld, insn_lui, insn_lw,
         insn_lwx, insn_mfc0, insn_mfhc0, insn_mfhi, insn_mflo, insn_mtc0,
-        insn_mthc0, insn_mul, insn_or, insn_ori, insn_pref, insn_rfe, insn_rotr,
-        insn_sc, insn_scd, insn_sd, insn_sll, insn_sllv, insn_slt, insn_sltiu,
-        insn_sltu, insn_sra, insn_srl, insn_srlv, insn_subu, insn_sw, insn_sync,
-        insn_syscall, insn_tlbp, insn_tlbr, insn_tlbwi, insn_tlbwr, insn_wait,
-        insn_wsbh, insn_xor, insn_xori, insn_yield, insn_lddir, insn_ldpte,
+        insn_mthc0, insn_mthi, insn_mtlo, insn_mul, insn_or, insn_ori,
+        insn_pref, insn_rfe, insn_rotr, insn_sc, insn_scd, insn_sd, insn_sll,
+        insn_sllv, insn_slt, insn_sltiu, insn_sltu, insn_sra, insn_srl,
+        insn_srlv, insn_subu, insn_sw, insn_sync, insn_syscall, insn_tlbp,
+        insn_tlbr, insn_tlbwi, insn_tlbwr, insn_wait, insn_wsbh, insn_xor,
+        insn_xori, insn_yield, insn_lddir, insn_ldpte,
 };
 
 struct insn {
@@ -306,6 +307,8 @@ I_u1(_mfhi)
 I_u1(_mflo)
 I_u1u2u3(_mtc0)
 I_u1u2u3(_mthc0)
+I_u1(_mthi)
+I_u1(_mtlo)
 I_u3u1u2(_mul)
 I_u2u1u3(_ori)
 I_u3u1u2(_or)