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KVM: PPC: Book3S HV: Remove TM emulation from POWER7/8 path

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TM fake-suspend emulation is only used by POWER9. Remove it from the old
code path.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210811160134.904987-3-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin 2021-08-12 02:00:36 +10:00 committed by Michael Ellerman
parent fd42b7b09c
commit daac40e8d7
1 changed files with 0 additions and 42 deletions
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42
arch/powerpc/kvm/book3s_hv_rmhandlers.S
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@ -1088,12 +1088,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
cmpwi r12, BOOK3S_INTERRUPT_H_INST_STORAGE
beq kvmppc_hisi
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
/* For softpatch interrupt, go off and do TM instruction emulation */
cmpwi r12, BOOK3S_INTERRUPT_HV_SOFTPATCH
beq kvmppc_tm_emul
#endif
/* See if this is a leftover HDEC interrupt */
cmpwi r12,BOOK3S_INTERRUPT_HV_DECREMENTER
bne 2f
@ -1599,42 +1593,6 @@ maybe_reenter_guest:
blt deliver_guest_interrupt
b guest_exit_cont
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
/*
* Softpatch interrupt for transactional memory emulation cases
* on POWER9 DD2.2. This is early in the guest exit path - we
* haven't saved registers or done a treclaim yet.
*/
kvmppc_tm_emul:
/* Save instruction image in HEIR */
mfspr r3, SPRN_HEIR
stw r3, VCPU_HEIR(r9)
/*
* The cases we want to handle here are those where the guest
* is in real suspend mode and is trying to transition to
* transactional mode.
*/
lbz r0, HSTATE_FAKE_SUSPEND(r13)
cmpwi r0, 0 /* keep exiting guest if in fake suspend */
bne guest_exit_cont
rldicl r3, r11, 64 - MSR_TS_S_LG, 62
cmpwi r3, 1 /* or if not in suspend state */
bne guest_exit_cont
/* Call C code to do the emulation */
mr r3, r9
bl kvmhv_p9_tm_emulation_early
nop
ld r9, HSTATE_KVM_VCPU(r13)
li r12, BOOK3S_INTERRUPT_HV_SOFTPATCH
cmpwi r3, 0
beq guest_exit_cont /* continue exiting if not handled */
ld r10, VCPU_PC(r9)
ld r11, VCPU_MSR(r9)
b fast_interrupt_c_return /* go back to guest if handled */
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
/*
* Check whether an HDSI is an HPTE not found fault or something else.
* If it is an HPTE not found fault that is due to the guest accessing