Commit 3e8f150a authored by Paul Mackerras's avatar Paul Mackerras

Merge remote-tracking branch 'remotes/powerpc/topic/ppc-kvm' into kvm-ppc-next

This merges in the ppc-kvm topic branch of the powerpc tree to get the
commit that reverts the patch "KVM: PPC: Book3S HV: POWER9 does not
require secondary thread management".  This is needed for subsequent
patches which will be applied on this branch.
Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
parents 93897a1f 2a3d6553
......@@ -104,10 +104,6 @@ struct kvmppc_host_state {
u8 napping;
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
/*
* hwthread_req/hwthread_state pair is used to pull sibling threads
* out of guest on pre-ISAv3.0B CPUs where threads share MMU.
*/
u8 hwthread_req;
u8 hwthread_state;
u8 host_ipi;
......
......@@ -319,20 +319,13 @@ enter_winkle:
/*
* r3 - PSSCR value corresponding to the requested stop state.
*/
power_enter_stop:
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
power_enter_stop_kvm_rm:
/*
* This is currently unused because POWER9 KVM does not have to
* gather secondary threads into sibling mode, but the code is
* here in case that function is required.
*
* Tell KVM we're entering idle.
*/
/* Tell KVM we're entering idle */
li r4,KVM_HWTHREAD_IN_IDLE
/* DO THIS IN REAL MODE! See comment above. */
stb r4,HSTATE_HWTHREAD_STATE(r13)
#endif
power_enter_stop:
/*
* Check if we are executing the lite variant with ESL=EC=0
*/
......@@ -496,18 +489,6 @@ pnv_powersave_wakeup_mce:
b pnv_powersave_wakeup
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
kvm_start_guest_check:
li r0,KVM_HWTHREAD_IN_KERNEL
stb r0,HSTATE_HWTHREAD_STATE(r13)
/* Order setting hwthread_state vs. testing hwthread_req */
sync
lbz r0,HSTATE_HWTHREAD_REQ(r13)
cmpwi r0,0
beqlr
b kvm_start_guest
#endif
/*
* Called from reset vector for powersave wakeups.
* cr3 - set to gt if waking up with partial/complete hypervisor state loss
......@@ -532,9 +513,15 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_ARCH_300)
mr r3,r12
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
BEGIN_FTR_SECTION
bl kvm_start_guest_check
END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_300)
li r0,KVM_HWTHREAD_IN_KERNEL
stb r0,HSTATE_HWTHREAD_STATE(r13)
/* Order setting hwthread_state vs. testing hwthread_req */
sync
lbz r0,HSTATE_HWTHREAD_REQ(r13)
cmpwi r0,0
beq 1f
b kvm_start_guest
1:
#endif
/* Return SRR1 from power7_nap() */
......
......@@ -2118,15 +2118,6 @@ static int kvmppc_grab_hwthread(int cpu)
struct paca_struct *tpaca;
long timeout = 10000;
/*
* ISA v3.0 idle routines do not set hwthread_state or test
* hwthread_req, so they can not grab idle threads.
*/
if (cpu_has_feature(CPU_FTR_ARCH_300)) {
WARN(1, "KVM: can not control sibling threads\n");
return -EBUSY;
}
tpaca = &paca[cpu];
/* Ensure the thread won't go into the kernel if it wakes */
......@@ -2161,12 +2152,10 @@ static void kvmppc_release_hwthread(int cpu)
struct paca_struct *tpaca;
tpaca = &paca[cpu];
tpaca->kvm_hstate.hwthread_req = 0;
tpaca->kvm_hstate.kvm_vcpu = NULL;
tpaca->kvm_hstate.kvm_vcore = NULL;
tpaca->kvm_hstate.kvm_split_mode = NULL;
if (!cpu_has_feature(CPU_FTR_ARCH_300))
tpaca->kvm_hstate.hwthread_req = 0;
}
static void radix_flush_cpu(struct kvm *kvm, int cpu, struct kvm_vcpu *vcpu)
......
......@@ -150,11 +150,9 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
subf r4, r4, r3
mtspr SPRN_DEC, r4
BEGIN_FTR_SECTION
/* hwthread_req may have got set by cede or no vcpu, so clear it */
li r0, 0
stb r0, HSTATE_HWTHREAD_REQ(r13)
END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_300)
/*
* For external interrupts we need to call the Linux
......@@ -317,7 +315,6 @@ kvm_novcpu_exit:
* Relocation is off and most register values are lost.
* r13 points to the PACA.
* r3 contains the SRR1 wakeup value, SRR1 is trashed.
* This is not used by ISAv3.0B processors.
*/
.globl kvm_start_guest
kvm_start_guest:
......@@ -436,9 +433,6 @@ kvm_secondary_got_guest:
* While waiting we also need to check if we get given a vcpu to run.
*/
kvm_no_guest:
BEGIN_FTR_SECTION
twi 31,0,0
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)
lbz r3, HSTATE_HWTHREAD_REQ(r13)
cmpwi r3, 0
bne 53f
......@@ -2544,10 +2538,8 @@ kvm_do_nap:
clrrdi r0, r0, 1
mtspr SPRN_CTRLT, r0
BEGIN_FTR_SECTION
li r0,1
stb r0,HSTATE_HWTHREAD_REQ(r13)
END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_300)
mfspr r5,SPRN_LPCR
ori r5,r5,LPCR_PECE0 | LPCR_PECE1
BEGIN_FTR_SECTION
......
......@@ -644,8 +644,8 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
break;
#endif
case KVM_CAP_PPC_HTM:
r = cpu_has_feature(CPU_FTR_TM_COMP) &&
is_kvmppc_hv_enabled(kvm);
r = is_kvmppc_hv_enabled(kvm) &&
(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM_COMP);
break;
default:
r = 0;
......
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