1 // SPDX-License-Identifier: GPL-2.0-only
12 #include <asm/ppc-opcode.h>
15  * This handles the cases where the guest is in real suspend mode
17  * The caller has checked that the guest is in real-suspend mode
18  * (MSR[TS] = S and the fake-suspend flag is not set).
22 	u32 instr = vcpu->arch.emul_inst;  in kvmhv_p9_tm_emulation_early()
32 	 * to handle TM-related invalid forms that have bit 31 = 0. Moreover,  in kvmhv_p9_tm_emulation_early()
39 		/* XXX do we need to check for PR=0 here? */  in kvmhv_p9_tm_emulation_early()
40 		newmsr = vcpu->arch.shregs.srr1;  in kvmhv_p9_tm_emulation_early()
41 		/* should only get here for Sx -> T1 transition */  in kvmhv_p9_tm_emulation_early()
45 		vcpu->arch.shregs.msr = newmsr;  in kvmhv_p9_tm_emulation_early()
46 		vcpu->arch.cfar = vcpu->arch.regs.nip - 4;  in kvmhv_p9_tm_emulation_early()
47 		vcpu->arch.regs.nip = vcpu->arch.shregs.srr0;  in kvmhv_p9_tm_emulation_early()
52 		msr = vcpu->arch.shregs.msr;  in kvmhv_p9_tm_emulation_early()
53 		if ((msr & MSR_PR) && (vcpu->arch.vcore->pcr & PCR_ARCH_206))  in kvmhv_p9_tm_emulation_early()
56 		if (!(vcpu->arch.hfscr & HFSCR_EBB) ||  in kvmhv_p9_tm_emulation_early()
60 		/* expect to see a S->T transition requested */  in kvmhv_p9_tm_emulation_early()
68 		vcpu->arch.shregs.msr = msr;  in kvmhv_p9_tm_emulation_early()
69 		vcpu->arch.cfar = vcpu->arch.regs.nip - 4;  in kvmhv_p9_tm_emulation_early()
70 		vcpu->arch.regs.nip = mfspr(SPRN_EBBRR);  in kvmhv_p9_tm_emulation_early()
74 		/* XXX do we need to check for PR=0 here? */  in kvmhv_p9_tm_emulation_early()
77 		msr = vcpu->arch.shregs.msr;  in kvmhv_p9_tm_emulation_early()
78 		/* check this is a Sx -> T1 transition */  in kvmhv_p9_tm_emulation_early()
84 		vcpu->arch.shregs.msr = newmsr;  in kvmhv_p9_tm_emulation_early()
90 		msr = vcpu->arch.shregs.msr;  in kvmhv_p9_tm_emulation_early()
92 		if ((msr & MSR_PR) && (vcpu->arch.vcore->pcr & PCR_ARCH_206))  in kvmhv_p9_tm_emulation_early()
95 		if (!(vcpu->arch.hfscr & HFSCR_TM) || !(msr & MSR_TM))  in kvmhv_p9_tm_emulation_early()
99 			vcpu->arch.shregs.msr = (msr & ~MSR_TS_MASK) | MSR_TS_T;  in kvmhv_p9_tm_emulation_early()
101 		vcpu->arch.regs.ccr = (vcpu->arch.regs.ccr & 0x0fffffff) |  in kvmhv_p9_tm_emulation_early()
115 	vcpu->arch.shregs.msr &= ~MSR_TS_MASK;	/* go to N state */  in kvmhv_emulate_tm_rollback()
116 	vcpu->arch.regs.nip = vcpu->arch.tfhar;  in kvmhv_emulate_tm_rollback()
118 	vcpu->arch.regs.ccr = (vcpu->arch.regs.ccr & 0x0fffffff) | 0xa0000000;  in kvmhv_emulate_tm_rollback()