Commit b82fad4d authored by Tiezhu Yang's avatar Tiezhu Yang Committed by Huacai Chen
Browse files

LoongArch: Check for AMO instructions in insns_not_supported() 

Like llsc instructions, the atomic memory access instructions shouldn't
be supported for probing, so check for them in insns_not_supported().

Closes: https://lore.kernel.org/all/SY4P282MB351877A70A0333C790FE85A5C09C9@SY4P282MB3518.AUSP282.PROD.OUTLOOK.COM/


Tested-by: default avatarJeff Xie <xiehuan09@gmail.com>
Reported-by: default avatarHengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: default avatarTiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 3d2c3daf

arch/loongarch/include/asm/inst.h

+26 −0
Original line number Diff line number Diff line
@@ -187,6 +187,32 @@ enum reg3_op { 
	amord_op	= 0x70c7,

	amxorw_op	= 0x70c8,

	amxord_op	= 0x70c9,

	ammaxw_op	= 0x70ca,

	ammaxd_op	= 0x70cb,

	amminw_op	= 0x70cc,

	ammind_op	= 0x70cd,

	ammaxwu_op	= 0x70ce,

	ammaxdu_op	= 0x70cf,

	amminwu_op	= 0x70d0,

	ammindu_op	= 0x70d1,

	amswapdbw_op	= 0x70d2,

	amswapdbd_op	= 0x70d3,

	amadddbw_op	= 0x70d4,

	amadddbd_op	= 0x70d5,

	amanddbw_op	= 0x70d6,

	amanddbd_op	= 0x70d7,

	amordbw_op	= 0x70d8,

	amordbd_op	= 0x70d9,

	amxordbw_op	= 0x70da,

	amxordbd_op	= 0x70db,

	ammaxdbw_op	= 0x70dc,

	ammaxdbd_op	= 0x70dd,

	ammindbw_op	= 0x70de,

	ammindbd_op	= 0x70df,

	ammaxdbwu_op	= 0x70e0,

	ammaxdbdu_op	= 0x70e1,

	ammindbwu_op	= 0x70e2,

	ammindbdu_op	= 0x70e3,

	fldgts_op	= 0x70e8,

	fldgtd_op	= 0x70e9,

	fldles_op	= 0x70ea,

arch/loongarch/kernel/inst.c

+6 −0
Original line number Diff line number Diff line
@@ -135,6 +135,12 @@ void simu_branch(struct pt_regs *regs, union loongarch_instruction insn) 


bool insns_not_supported(union loongarch_instruction insn)

{

	switch (insn.reg3_format.opcode) {

	case amswapw_op ... ammindbdu_op:

		pr_notice("atomic memory access instructions are not supported\n");

		return true;

	}



	switch (insn.reg2i14_format.opcode) {

	case llw_op:

	case lld_op: