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Merge branch 'kvm-ppchv-next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into kvm-next

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This commit is contained in:
Paolo Bonzini 2014-03-29 15:44:05 +01:00
commit 7227fc0666
13 changed files with 377 additions and 67 deletions
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5
arch/powerpc/include/asm/kvm_book3s.h
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@ -304,6 +304,11 @@ static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
return vcpu->arch.fault_dar;
}
static inline bool is_kvmppc_resume_guest(int r)
{
return (r == RESUME_GUEST || r == RESUME_GUEST_NV);
}
/* Magic register values loaded into r3 and r4 before the 'sc' assembly
* instruction for the OSI hypercalls */
#define OSI_SC_MAGIC_R3 0x113724FA

12
arch/powerpc/include/asm/kvm_book3s_64.h
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@ -289,6 +289,18 @@ static inline void note_hpte_modification(struct kvm *kvm,
if (atomic_read(&kvm->arch.hpte_mod_interest))
rev->guest_rpte |= HPTE_GR_MODIFIED;
}
/*
* Like kvm_memslots(), but for use in real mode when we can't do
* any RCU stuff (since the secondary threads are offline from the
* kernel's point of view), and we can't print anything.
* Thus we use rcu_dereference_raw() rather than rcu_dereference_check().
*/
static inline struct kvm_memslots *kvm_memslots_raw(struct kvm *kvm)
{
return rcu_dereference_raw_notrace(kvm->memslots);
}
#endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
#endif /* __ASM_KVM_BOOK3S_64_H__ */

2
arch/powerpc/include/asm/kvm_book3s_asm.h
View File

@ -94,7 +94,7 @@ struct kvmppc_host_state {
unsigned long xics_phys;
u32 saved_xirr;
u64 dabr;
u64 host_mmcr[3];
u64 host_mmcr[7]; /* MMCR 0,1,A, SIAR, SDAR, MMCR2, SIER */
u32 host_pmc[8];
u64 host_purr;
u64 host_spurr;

2
arch/powerpc/include/asm/kvm_ppc.h
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@ -129,6 +129,8 @@ extern long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
struct kvm_create_spapr_tce *args);
extern long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
unsigned long ioba, unsigned long tce);
extern long kvmppc_h_get_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
unsigned long ioba);
extern struct kvm_rma_info *kvm_alloc_rma(void);
extern void kvm_release_rma(struct kvm_rma_info *ri);
extern struct page *kvm_alloc_hpt(unsigned long nr_pages);

1
arch/powerpc/include/asm/reg.h
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@ -213,6 +213,7 @@
#define SPRN_ACOP 0x1F /* Available Coprocessor Register */
#define SPRN_TFIAR 0x81 /* Transaction Failure Inst Addr */
#define SPRN_TEXASR 0x82 /* Transaction EXception & Summary */
#define TEXASR_FS __MASK(63-36) /* Transaction Failure Summary */
#define SPRN_TEXASRU 0x83 /* '' '' '' Upper 32 */
#define SPRN_TFHAR 0x80 /* Transaction Failure Handler Addr */
#define SPRN_CTRLF 0x088

4
arch/powerpc/include/asm/tm.h
View File

@ -7,6 +7,8 @@
#include <uapi/asm/tm.h>
#ifndef __ASSEMBLY__
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
extern void do_load_up_transact_fpu(struct thread_struct *thread);
extern void do_load_up_transact_altivec(struct thread_struct *thread);
@ -21,3 +23,5 @@ extern void tm_recheckpoint(struct thread_struct *thread,
extern void tm_abort(uint8_t cause);
extern void tm_save_sprs(struct thread_struct *thread);
extern void tm_restore_sprs(struct thread_struct *thread);
#endif /* __ASSEMBLY__ */

9
arch/powerpc/kvm/book3s_64_mmu_hv.c
View File

@ -262,7 +262,14 @@ int kvmppc_mmu_hv_init(void)
static void kvmppc_mmu_book3s_64_hv_reset_msr(struct kvm_vcpu *vcpu)
{
kvmppc_set_msr(vcpu, vcpu->arch.intr_msr);
unsigned long msr = vcpu->arch.intr_msr;
/* If transactional, change to suspend mode on IRQ delivery */
if (MSR_TM_TRANSACTIONAL(vcpu->arch.shregs.msr))
msr |= MSR_TS_S;
else
msr |= vcpu->arch.shregs.msr & MSR_TS_MASK;
kvmppc_set_msr(vcpu, msr);
}
/*

28
arch/powerpc/kvm/book3s_64_vio_hv.c
View File

@ -75,3 +75,31 @@ long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
return H_TOO_HARD;
}
EXPORT_SYMBOL_GPL(kvmppc_h_put_tce);
long kvmppc_h_get_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
unsigned long ioba)
{
struct kvm *kvm = vcpu->kvm;
struct kvmppc_spapr_tce_table *stt;
list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) {
if (stt->liobn == liobn) {
unsigned long idx = ioba >> SPAPR_TCE_SHIFT;
struct page *page;
u64 *tbl;
if (ioba >= stt->window_size)
return H_PARAMETER;
page = stt->pages[idx / TCES_PER_PAGE];
tbl = (u64 *)page_address(page);
vcpu->arch.gpr[4] = tbl[idx % TCES_PER_PAGE];
return H_SUCCESS;
}
}
/* Didn't find the liobn, punt it to userspace */
return H_TOO_HARD;
}
EXPORT_SYMBOL_GPL(kvmppc_h_get_tce);

159
arch/powerpc/kvm/book3s_hv.c
View File

@ -86,7 +86,7 @@ static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu)
/* CPU points to the first thread of the core */
if (cpu != me && cpu >= 0 && cpu < nr_cpu_ids) {
#ifdef CONFIG_KVM_XICS
#ifdef CONFIG_PPC_ICP_NATIVE
int real_cpu = cpu + vcpu->arch.ptid;
if (paca[real_cpu].kvm_hstate.xics_phys)
xics_wake_cpu(real_cpu);
@ -879,17 +879,6 @@ static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
case KVM_REG_PPC_IAMR:
*val = get_reg_val(id, vcpu->arch.iamr);
break;
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
case KVM_REG_PPC_TFHAR:
*val = get_reg_val(id, vcpu->arch.tfhar);
break;
case KVM_REG_PPC_TFIAR:
*val = get_reg_val(id, vcpu->arch.tfiar);
break;
case KVM_REG_PPC_TEXASR:
*val = get_reg_val(id, vcpu->arch.texasr);
break;
#endif
case KVM_REG_PPC_FSCR:
*val = get_reg_val(id, vcpu->arch.fscr);
break;
@ -970,6 +959,69 @@ static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
case KVM_REG_PPC_PPR:
*val = get_reg_val(id, vcpu->arch.ppr);
break;
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
case KVM_REG_PPC_TFHAR:
*val = get_reg_val(id, vcpu->arch.tfhar);
break;
case KVM_REG_PPC_TFIAR:
*val = get_reg_val(id, vcpu->arch.tfiar);
break;
case KVM_REG_PPC_TEXASR:
*val = get_reg_val(id, vcpu->arch.texasr);
break;
case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
i = id - KVM_REG_PPC_TM_GPR0;
*val = get_reg_val(id, vcpu->arch.gpr_tm[i]);
break;
case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
{
int j;
i = id - KVM_REG_PPC_TM_VSR0;
if (i < 32)
for (j = 0; j < TS_FPRWIDTH; j++)
val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j];
else {
if (cpu_has_feature(CPU_FTR_ALTIVEC))
val->vval = vcpu->arch.vr_tm.vr[i-32];
else
r = -ENXIO;
}
break;
}
case KVM_REG_PPC_TM_CR:
*val = get_reg_val(id, vcpu->arch.cr_tm);
break;
case KVM_REG_PPC_TM_LR:
*val = get_reg_val(id, vcpu->arch.lr_tm);
break;
case KVM_REG_PPC_TM_CTR:
*val = get_reg_val(id, vcpu->arch.ctr_tm);
break;
case KVM_REG_PPC_TM_FPSCR:
*val = get_reg_val(id, vcpu->arch.fp_tm.fpscr);
break;
case KVM_REG_PPC_TM_AMR:
*val = get_reg_val(id, vcpu->arch.amr_tm);
break;
case KVM_REG_PPC_TM_PPR:
*val = get_reg_val(id, vcpu->arch.ppr_tm);
break;
case KVM_REG_PPC_TM_VRSAVE:
*val = get_reg_val(id, vcpu->arch.vrsave_tm);
break;
case KVM_REG_PPC_TM_VSCR:
if (cpu_has_feature(CPU_FTR_ALTIVEC))
*val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]);
else
r = -ENXIO;
break;
case KVM_REG_PPC_TM_DSCR:
*val = get_reg_val(id, vcpu->arch.dscr_tm);
break;
case KVM_REG_PPC_TM_TAR:
*val = get_reg_val(id, vcpu->arch.tar_tm);
break;
#endif
case KVM_REG_PPC_ARCH_COMPAT:
*val = get_reg_val(id, vcpu->arch.vcore->arch_compat);
break;
@ -1039,17 +1091,6 @@ static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
case KVM_REG_PPC_IAMR:
vcpu->arch.iamr = set_reg_val(id, *val);
break;
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
case KVM_REG_PPC_TFHAR:
vcpu->arch.tfhar = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TFIAR:
vcpu->arch.tfiar = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TEXASR:
vcpu->arch.texasr = set_reg_val(id, *val);
break;
#endif
case KVM_REG_PPC_FSCR:
vcpu->arch.fscr = set_reg_val(id, *val);
break;
@ -1144,6 +1185,68 @@ static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
case KVM_REG_PPC_PPR:
vcpu->arch.ppr = set_reg_val(id, *val);
break;
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
case KVM_REG_PPC_TFHAR:
vcpu->arch.tfhar = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TFIAR:
vcpu->arch.tfiar = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TEXASR:
vcpu->arch.texasr = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
i = id - KVM_REG_PPC_TM_GPR0;
vcpu->arch.gpr_tm[i] = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
{
int j;
i = id - KVM_REG_PPC_TM_VSR0;
if (i < 32)
for (j = 0; j < TS_FPRWIDTH; j++)
vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j];
else
if (cpu_has_feature(CPU_FTR_ALTIVEC))
vcpu->arch.vr_tm.vr[i-32] = val->vval;
else
r = -ENXIO;
break;
}
case KVM_REG_PPC_TM_CR:
vcpu->arch.cr_tm = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TM_LR:
vcpu->arch.lr_tm = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TM_CTR:
vcpu->arch.ctr_tm = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TM_FPSCR:
vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TM_AMR:
vcpu->arch.amr_tm = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TM_PPR:
vcpu->arch.ppr_tm = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TM_VRSAVE:
vcpu->arch.vrsave_tm = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TM_VSCR:
if (cpu_has_feature(CPU_FTR_ALTIVEC))
vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val);
else
r = - ENXIO;
break;
case KVM_REG_PPC_TM_DSCR:
vcpu->arch.dscr_tm = set_reg_val(id, *val);
break;
case KVM_REG_PPC_TM_TAR:
vcpu->arch.tar_tm = set_reg_val(id, *val);
break;
#endif
case KVM_REG_PPC_ARCH_COMPAT:
r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val));
break;
@ -1360,9 +1463,7 @@ static void kvmppc_start_thread(struct kvm_vcpu *vcpu)
smp_wmb();
#if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
if (cpu != smp_processor_id()) {
#ifdef CONFIG_KVM_XICS
xics_wake_cpu(cpu);
#endif
if (vcpu->arch.ptid)
++vc->n_woken;
}
@ -1530,7 +1631,7 @@ static void kvmppc_run_core(struct kvmppc_vcore *vc)
vcpu->arch.trap = 0;
if (vcpu->arch.ceded) {
if (ret != RESUME_GUEST)
if (!is_kvmppc_resume_guest(ret))
kvmppc_end_cede(vcpu);
else
kvmppc_set_timer(vcpu);
@ -1541,7 +1642,7 @@ static void kvmppc_run_core(struct kvmppc_vcore *vc)
vc->vcore_state = VCORE_INACTIVE;
list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads,
arch.run_list) {
if (vcpu->arch.ret != RESUME_GUEST) {
if (!is_kvmppc_resume_guest(vcpu->arch.ret)) {
kvmppc_remove_runnable(vc, vcpu);
wake_up(&vcpu->arch.cpu_run);
}
@ -1731,7 +1832,7 @@ static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu)
vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
}
} while (r == RESUME_GUEST);
} while (is_kvmppc_resume_guest(r));
out:
vcpu->arch.state = KVMPPC_VCPU_NOTREADY;
@ -2366,7 +2467,7 @@ static int kvmppc_book3s_init_hv(void)
*/
r = kvmppc_core_check_processor_compat_hv();
if (r < 0)
return r;
return -ENODEV;
kvm_ops_hv.owner = THIS_MODULE;
kvmppc_hv_ops = &kvm_ops_hv;

22
arch/powerpc/kvm/book3s_hv_interrupts.S
View File

@ -71,6 +71,14 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
mtmsrd r10,1
/* Save host PMU registers */
BEGIN_FTR_SECTION
/* Work around P8 PMAE bug */
li r3, -1
clrrdi r3, r3, 10
mfspr r8, SPRN_MMCR2
mtspr SPRN_MMCR2, r3 /* freeze all counters using MMCR2 */
isync
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
li r3, 1
sldi r3, r3, 31 /* MMCR0_FC (freeze counters) bit */
mfspr r7, SPRN_MMCR0 /* save MMCR0 */
@ -87,9 +95,18 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
cmpwi r5, 0
beq 31f /* skip if not */
mfspr r5, SPRN_MMCR1
mfspr r9, SPRN_SIAR
mfspr r10, SPRN_SDAR
std r7, HSTATE_MMCR(r13)
std r5, HSTATE_MMCR + 8(r13)
std r6, HSTATE_MMCR + 16(r13)
std r9, HSTATE_MMCR + 24(r13)
std r10, HSTATE_MMCR + 32(r13)
BEGIN_FTR_SECTION
mfspr r9, SPRN_SIER
std r8, HSTATE_MMCR + 40(r13)
std r9, HSTATE_MMCR + 48(r13)
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
mfspr r3, SPRN_PMC1
mfspr r5, SPRN_PMC2
mfspr r6, SPRN_PMC3
@ -110,6 +127,11 @@ BEGIN_FTR_SECTION
stw r10, HSTATE_PMC + 24(r13)
stw r11, HSTATE_PMC + 28(r13)
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
BEGIN_FTR_SECTION
mfspr r9, SPRN_SIER
std r8, HSTATE_MMCR + 40(r13)
std r9, HSTATE_MMCR + 48(r13)
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
31:
/*

6
arch/powerpc/kvm/book3s_hv_rm_mmu.c
View File

@ -111,7 +111,7 @@ static void remove_revmap_chain(struct kvm *kvm, long pte_index,
rcbits = hpte_r & (HPTE_R_R | HPTE_R_C);
ptel = rev->guest_rpte |= rcbits;
gfn = hpte_rpn(ptel, hpte_page_size(hpte_v, ptel));
memslot = __gfn_to_memslot(kvm_memslots(kvm), gfn);
memslot = __gfn_to_memslot(kvm_memslots_raw(kvm), gfn);
if (!memslot)
return;
@ -192,7 +192,7 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
/* Find the memslot (if any) for this address */
gpa = (ptel & HPTE_R_RPN) & ~(psize - 1);
gfn = gpa >> PAGE_SHIFT;
memslot = __gfn_to_memslot(kvm_memslots(kvm), gfn);
memslot = __gfn_to_memslot(kvm_memslots_raw(kvm), gfn);
pa = 0;
is_io = ~0ul;
rmap = NULL;
@ -670,7 +670,7 @@ long kvmppc_h_protect(struct kvm_vcpu *vcpu, unsigned long flags,
psize = hpte_page_size(v, r);
gfn = ((r & HPTE_R_RPN) & ~(psize - 1)) >> PAGE_SHIFT;
memslot = __gfn_to_memslot(kvm_memslots(kvm), gfn);
memslot = __gfn_to_memslot(kvm_memslots_raw(kvm), gfn);
if (memslot) {
hva = __gfn_to_hva_memslot(memslot, gfn);
pte = lookup_linux_pte_and_update(pgdir, hva,

187
arch/powerpc/kvm/book3s_hv_rmhandlers.S
View File

@ -28,6 +28,9 @@
#include <asm/exception-64s.h>
#include <asm/kvm_book3s_asm.h>
#include <asm/mmu-hash64.h>
#include <asm/tm.h>
#define VCPU_GPRS_TM(reg) (((reg) * ULONG_SIZE) + VCPU_GPR_TM)
#ifdef __LITTLE_ENDIAN__
#error Need to fix lppaca and SLB shadow accesses in little endian mode
@ -106,8 +109,18 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
ld r3, HSTATE_MMCR(r13)
ld r4, HSTATE_MMCR + 8(r13)
ld r5, HSTATE_MMCR + 16(r13)
ld r6, HSTATE_MMCR + 24(r13)
ld r7, HSTATE_MMCR + 32(r13)
mtspr SPRN_MMCR1, r4
mtspr SPRN_MMCRA, r5
mtspr SPRN_SIAR, r6
mtspr SPRN_SDAR, r7
BEGIN_FTR_SECTION
ld r8, HSTATE_MMCR + 40(r13)
ld r9, HSTATE_MMCR + 48(r13)
mtspr SPRN_MMCR2, r8
mtspr SPRN_SIER, r9
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
mtspr SPRN_MMCR0, r3
isync
23:
@ -597,6 +610,116 @@ BEGIN_FTR_SECTION
END_FTR_SECTION_NESTED(CPU_FTR_ARCH_206, CPU_FTR_ARCH_206, 89)
END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
BEGIN_FTR_SECTION
b skip_tm
END_FTR_SECTION_IFCLR(CPU_FTR_TM)
/* Turn on TM/FP/VSX/VMX so we can restore them. */
mfmsr r5
li r6, MSR_TM >> 32
sldi r6, r6, 32
or r5, r5, r6
ori r5, r5, MSR_FP
oris r5, r5, (MSR_VEC | MSR_VSX)@h
mtmsrd r5
/*
* The user may change these outside of a transaction, so they must
* always be context switched.
*/
ld r5, VCPU_TFHAR(r4)
ld r6, VCPU_TFIAR(r4)
ld r7, VCPU_TEXASR(r4)
mtspr SPRN_TFHAR, r5
mtspr SPRN_TFIAR, r6
mtspr SPRN_TEXASR, r7
ld r5, VCPU_MSR(r4)
rldicl. r5, r5, 64 - MSR_TS_S_LG, 62
beq skip_tm /* TM not active in guest */
/* Make sure the failure summary is set, otherwise we'll program check
* when we trechkpt. It's possible that this might have been not set
* on a kvmppc_set_one_reg() call but we shouldn't let this crash the
* host.
*/
oris r7, r7, (TEXASR_FS)@h
mtspr SPRN_TEXASR, r7
/*
* We need to load up the checkpointed state for the guest.
* We need to do this early as it will blow away any GPRs, VSRs and
* some SPRs.
*/
mr r31, r4
addi r3, r31, VCPU_FPRS_TM
bl .load_fp_state
addi r3, r31, VCPU_VRS_TM
bl .load_vr_state
mr r4, r31
lwz r7, VCPU_VRSAVE_TM(r4)
mtspr SPRN_VRSAVE, r7
ld r5, VCPU_LR_TM(r4)
lwz r6, VCPU_CR_TM(r4)
ld r7, VCPU_CTR_TM(r4)
ld r8, VCPU_AMR_TM(r4)
ld r9, VCPU_TAR_TM(r4)
mtlr r5
mtcr r6
mtctr r7
mtspr SPRN_AMR, r8
mtspr SPRN_TAR, r9
/*
* Load up PPR and DSCR values but don't put them in the actual SPRs
* till the last moment to avoid running with userspace PPR and DSCR for
* too long.
*/
ld r29, VCPU_DSCR_TM(r4)
ld r30, VCPU_PPR_TM(r4)
std r2, PACATMSCRATCH(r13) /* Save TOC */
/* Clear the MSR RI since r1, r13 are all going to be foobar. */
li r5, 0
mtmsrd r5, 1
/* Load GPRs r0-r28 */
reg = 0
.rept 29
ld reg, VCPU_GPRS_TM(reg)(r31)
reg = reg + 1
.endr
mtspr SPRN_DSCR, r29
mtspr SPRN_PPR, r30
/* Load final GPRs */
ld 29, VCPU_GPRS_TM(29)(r31)
ld 30, VCPU_GPRS_TM(30)(r31)
ld 31, VCPU_GPRS_TM(31)(r31)
/* TM checkpointed state is now setup. All GPRs are now volatile. */
TRECHKPT
/* Now let's get back the state we need. */
HMT_MEDIUM
GET_PACA(r13)
ld r29, HSTATE_DSCR(r13)
mtspr SPRN_DSCR, r29
ld r4, HSTATE_KVM_VCPU(r13)
ld r1, HSTATE_HOST_R1(r13)
ld r2, PACATMSCRATCH(r13)
/* Set the MSR RI since we have our registers back. */
li r5, MSR_RI
mtmsrd r5, 1
skip_tm:
#endif
/* Load guest PMU registers */
/* R4 is live here (vcpu pointer) */
li r3, 1
@ -704,14 +827,6 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
ld r6, VCPU_VTB(r4)
mtspr SPRN_IC, r5
mtspr SPRN_VTB, r6
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
ld r5, VCPU_TFHAR(r4)
ld r6, VCPU_TFIAR(r4)
ld r7, VCPU_TEXASR(r4)
mtspr SPRN_TFHAR, r5
mtspr SPRN_TFIAR, r6
mtspr SPRN_TEXASR, r7
#endif
ld r8, VCPU_EBBHR(r4)
mtspr SPRN_EBBHR, r8
ld r5, VCPU_EBBRR(r4)
@ -736,6 +851,10 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
* Set the decrementer to the guest decrementer.
*/
ld r8,VCPU_DEC_EXPIRES(r4)
/* r8 is a host timebase value here, convert to guest TB */
ld r5,HSTATE_KVM_VCORE(r13)
ld r6,VCORE_TB_OFFSET(r5)
add r8,r8,r6
mftb r7
subf r3,r7,r8
mtspr SPRN_DEC,r3
@ -817,7 +936,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
12: mtspr SPRN_SRR0, r10
mr r10,r0
mtspr SPRN_SRR1, r11
ld r11, VCPU_INTR_MSR(r4)
mr r9, r4
bl kvmppc_msr_interrupt
5:
/*
@ -1098,17 +1218,15 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_201)
mftb r6
extsw r5,r5
add r5,r5,r6
/* r5 is a guest timebase value here, convert to host TB */
ld r3,HSTATE_KVM_VCORE(r13)
ld r4,VCORE_TB_OFFSET(r3)
subf r5,r4,r5
std r5,VCPU_DEC_EXPIRES(r9)
BEGIN_FTR_SECTION
b 8f
END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
/* Turn on TM so we can access TFHAR/TFIAR/TEXASR */
mfmsr r8
li r0, 1
rldimi r8, r0, MSR_TM_LG, 63-MSR_TM_LG
mtmsrd r8
/* Save POWER8-specific registers */
mfspr r5, SPRN_IAMR
mfspr r6, SPRN_PSPB
@ -1122,14 +1240,6 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
std r5, VCPU_IC(r9)
std r6, VCPU_VTB(r9)
std r7, VCPU_TAR(r9)
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
mfspr r5, SPRN_TFHAR
mfspr r6, SPRN_TFIAR
mfspr r7, SPRN_TEXASR
std r5, VCPU_TFHAR(r9)
std r6, VCPU_TFIAR(r9)
std r7, VCPU_TEXASR(r9)
#endif
mfspr r8, SPRN_EBBHR
std r8, VCPU_EBBHR(r9)
mfspr r5, SPRN_EBBRR
@ -1387,7 +1497,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
ld r8,VCORE_TB_OFFSET(r5)
cmpdi r8,0
beq 17f
mftb r6 /* current host timebase */
mftb r6 /* current guest timebase */
subf r8,r8,r6
mtspr SPRN_TBU40,r8 /* update upper 40 bits */
mftb r7 /* check if lower 24 bits overflowed */
@ -1557,7 +1667,7 @@ kvmppc_hdsi:
mtspr SPRN_SRR0, r10
mtspr SPRN_SRR1, r11
li r10, BOOK3S_INTERRUPT_DATA_STORAGE
ld r11, VCPU_INTR_MSR(r9)
bl kvmppc_msr_interrupt
fast_interrupt_c_return:
6: ld r7, VCPU_CTR(r9)
lwz r8, VCPU_XER(r9)
@ -1626,7 +1736,7 @@ kvmppc_hisi:
1: mtspr SPRN_SRR0, r10
mtspr SPRN_SRR1, r11
li r10, BOOK3S_INTERRUPT_INST_STORAGE
ld r11, VCPU_INTR_MSR(r9)
bl kvmppc_msr_interrupt
b fast_interrupt_c_return
3: ld r6, VCPU_KVM(r9) /* not relocated, use VRMA */
@ -1669,7 +1779,7 @@ sc_1_fast_return:
mtspr SPRN_SRR0,r10
mtspr SPRN_SRR1,r11
li r10, BOOK3S_INTERRUPT_SYSCALL
ld r11, VCPU_INTR_MSR(r9)
bl kvmppc_msr_interrupt
mr r4,r9
b fast_guest_return
@ -1691,7 +1801,7 @@ hcall_real_table:
.long 0 /* 0x10 - H_CLEAR_MOD */
.long 0 /* 0x14 - H_CLEAR_REF */
.long .kvmppc_h_protect - hcall_real_table
.long 0 /* 0x1c - H_GET_TCE */
.long .kvmppc_h_get_tce - hcall_real_table
.long .kvmppc_h_put_tce - hcall_real_table
.long 0 /* 0x24 - H_SET_SPRG0 */
.long .kvmppc_h_set_dabr - hcall_real_table
@ -1997,7 +2107,7 @@ machine_check_realmode:
beq mc_cont
/* If not, deliver a machine check. SRR0/1 are already set */
li r10, BOOK3S_INTERRUPT_MACHINE_CHECK
ld r11, VCPU_INTR_MSR(r9)
bl kvmppc_msr_interrupt
b fast_interrupt_c_return
/*
@ -2138,8 +2248,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
mfspr r6,SPRN_VRSAVE
stw r6,VCPU_VRSAVE(r31)
mtlr r30
mtmsrd r5
isync
blr
/*
@ -2186,3 +2294,20 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
*/
kvmppc_bad_host_intr:
b .
/*
* This mimics the MSR transition on IRQ delivery. The new guest MSR is taken
* from VCPU_INTR_MSR and is modified based on the required TM state changes.
* r11 has the guest MSR value (in/out)
* r9 has a vcpu pointer (in)
* r0 is used as a scratch register
*/
kvmppc_msr_interrupt:
rldicl r0, r11, 64 - MSR_TS_S_LG, 62
cmpwi r0, 2 /* Check if we are in transactional state.. */
ld r11, VCPU_INTR_MSR(r9)
bne 1f
/* ... if transactional, change to suspended */
li r0, 1
1: rldimi r11, r0, MSR_TS_S_LG, 63 - MSR_TS_T_LG
blr

7
arch/powerpc/kvm/book3s_rtas.c
View File

@ -213,8 +213,11 @@ int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu)
gpa_t args_phys;
int rc;
/* r4 contains the guest physical address of the RTAS args */
args_phys = kvmppc_get_gpr(vcpu, 4);
/*
* r4 contains the guest physical address of the RTAS args
* Mask off the top 4 bits since this is a guest real address
*/
args_phys = kvmppc_get_gpr(vcpu, 4) & KVM_PAM;
rc = kvm_read_guest(vcpu->kvm, args_phys, &args, sizeof(args));
if (rc)