summaryrefslogtreecommitdiff
path: root/arch/powerpc/kvm
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/kvm')
-rw-r--r--arch/powerpc/kvm/Kconfig13
-rw-r--r--arch/powerpc/kvm/book3s_64_mmu_hv.c30
-rw-r--r--arch/powerpc/kvm/book3s_hv.c60
-rw-r--r--arch/powerpc/kvm/book3s_hv_builtin.c11
-rw-r--r--arch/powerpc/kvm/book3s_hv_interrupts.S30
-rw-r--r--arch/powerpc/kvm/book3s_hv_rm_mmu.c6
-rw-r--r--arch/powerpc/kvm/book3s_hv_rmhandlers.S230
-rw-r--r--arch/powerpc/kvm/powerpc.c3
8 files changed, 345 insertions, 38 deletions
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index 5d9b78ebbaa6..eeb42e06f2d7 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -67,23 +67,20 @@ config KVM_BOOK3S_64
If unsure, say N.
config KVM_BOOK3S_64_HV
- bool "KVM support for POWER7 using hypervisor mode in host"
+ bool "KVM support for POWER7 and PPC970 using hypervisor mode in host"
depends on KVM_BOOK3S_64
---help---
Support running unmodified book3s_64 guest kernels in
- virtual machines on POWER7 processors that have hypervisor
- mode available to the host.
+ virtual machines on POWER7 and PPC970 processors that have
+ hypervisor mode available to the host.
If you say Y here, KVM will use the hardware virtualization
facilities of POWER7 (and later) processors, meaning that
guest operating systems will run at full hardware speed
using supervisor and user modes. However, this also means
that KVM is not usable under PowerVM (pHyp), is only usable
- on POWER7 (or later) processors, and can only emulate
- POWER5+, POWER6 and POWER7 processors.
-
- This module provides access to the hardware capabilities through
- a character device node named /dev/kvm.
+ on POWER7 (or later) processors and PPC970-family processors,
+ and cannot emulate a different processor from the host processor.
If unsure, say N.
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 212dcd8fc50b..bc3a2ea94217 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -42,6 +42,8 @@
#define VRMA_PAGE_ORDER 24
#define VRMA_VSID 0x1ffffffUL /* 1TB VSID reserved for VRMA */
+/* POWER7 has 10-bit LPIDs, PPC970 has 6-bit LPIDs */
+#define MAX_LPID_970 63
#define NR_LPIDS (LPID_RSVD + 1)
unsigned long lpid_inuse[BITS_TO_LONGS(NR_LPIDS)];
@@ -69,9 +71,6 @@ long kvmppc_alloc_hpt(struct kvm *kvm)
kvm->arch.sdr1 = __pa(hpt) | (HPT_ORDER - 18);
kvm->arch.lpid = lpid;
- kvm->arch.host_sdr1 = mfspr(SPRN_SDR1);
- kvm->arch.host_lpid = mfspr(SPRN_LPID);
- kvm->arch.host_lpcr = mfspr(SPRN_LPCR);
pr_info("KVM guest htab at %lx, LPID %lx\n", hpt, lpid);
return 0;
@@ -128,12 +127,24 @@ void kvmppc_map_vrma(struct kvm *kvm, struct kvm_userspace_memory_region *mem)
int kvmppc_mmu_hv_init(void)
{
- if (!cpu_has_feature(CPU_FTR_HVMODE) ||
- !cpu_has_feature(CPU_FTR_ARCH_206))
+ unsigned long host_lpid, rsvd_lpid;
+
+ if (!cpu_has_feature(CPU_FTR_HVMODE))
return -EINVAL;
+
memset(lpid_inuse, 0, sizeof(lpid_inuse));
- set_bit(mfspr(SPRN_LPID), lpid_inuse);
- set_bit(LPID_RSVD, lpid_inuse);
+
+ if (cpu_has_feature(CPU_FTR_ARCH_206)) {
+ host_lpid = mfspr(SPRN_LPID); /* POWER7 */
+ rsvd_lpid = LPID_RSVD;
+ } else {
+ host_lpid = 0; /* PPC970 */
+ rsvd_lpid = MAX_LPID_970;
+ }
+
+ set_bit(host_lpid, lpid_inuse);
+ /* rsvd_lpid is reserved for use in partition switching */
+ set_bit(rsvd_lpid, lpid_inuse);
return 0;
}
@@ -157,7 +168,10 @@ void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu)
{
struct kvmppc_mmu *mmu = &vcpu->arch.mmu;
- vcpu->arch.slb_nr = 32; /* Assume POWER7 for now */
+ if (cpu_has_feature(CPU_FTR_ARCH_206))
+ vcpu->arch.slb_nr = 32; /* POWER7 */
+ else
+ vcpu->arch.slb_nr = 64;
mmu->xlate = kvmppc_mmu_book3s_64_hv_xlate;
mmu->reset_msr = kvmppc_mmu_book3s_64_hv_reset_msr;
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index dc70e7745ab3..cc0d7f1b19ab 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -443,8 +443,7 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
int kvmppc_core_check_processor_compat(void)
{
- if (cpu_has_feature(CPU_FTR_HVMODE) &&
- cpu_has_feature(CPU_FTR_ARCH_206))
+ if (cpu_has_feature(CPU_FTR_HVMODE))
return 0;
return -EIO;
}
@@ -731,6 +730,10 @@ static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
return -EINTR;
}
+ /* On PPC970, check that we have an RMA region */
+ if (!vcpu->kvm->arch.rma && cpu_has_feature(CPU_FTR_ARCH_201))
+ return -EPERM;
+
kvm_run->exit_reason = 0;
vcpu->arch.ret = RESUME_GUEST;
vcpu->arch.trap = 0;
@@ -920,12 +923,14 @@ fail:
}
/* Work out RMLS (real mode limit selector) field value for a given RMA size.
- Assumes POWER7. */
+ Assumes POWER7 or PPC970. */
static inline int lpcr_rmls(unsigned long rma_size)
{
switch (rma_size) {
case 32ul << 20: /* 32 MB */
- return 8;
+ if (cpu_has_feature(CPU_FTR_ARCH_206))
+ return 8; /* only supported on POWER7 */
+ return -1;
case 64ul << 20: /* 64 MB */
return 3;
case 128ul << 20: /* 128 MB */
@@ -1059,6 +1064,10 @@ int kvmppc_core_prepare_memory_region(struct kvm *kvm,
mem->userspace_addr == vma->vm_start)
ri = vma->vm_file->private_data;
up_read(&current->mm->mmap_sem);
+ if (!ri && cpu_has_feature(CPU_FTR_ARCH_201)) {
+ pr_err("CPU requires an RMO\n");
+ return -EINVAL;
+ }
}
if (ri) {
@@ -1077,10 +1086,25 @@ int kvmppc_core_prepare_memory_region(struct kvm *kvm,
atomic_inc(&ri->use_count);
kvm->arch.rma = ri;
kvm->arch.n_rma_pages = rma_size >> porder;
- lpcr = kvm->arch.lpcr & ~(LPCR_VPM0 | LPCR_VRMA_L);
- lpcr |= rmls << LPCR_RMLS_SH;
+
+ /* Update LPCR and RMOR */
+ lpcr = kvm->arch.lpcr;
+ if (cpu_has_feature(CPU_FTR_ARCH_201)) {
+ /* PPC970; insert RMLS value (split field) in HID4 */
+ lpcr &= ~((1ul << HID4_RMLS0_SH) |
+ (3ul << HID4_RMLS2_SH));
+ lpcr |= ((rmls >> 2) << HID4_RMLS0_SH) |
+ ((rmls & 3) << HID4_RMLS2_SH);
+ /* RMOR is also in HID4 */
+ lpcr |= ((ri->base_pfn >> (26 - PAGE_SHIFT)) & 0xffff)
+ << HID4_RMOR_SH;
+ } else {
+ /* POWER7 */
+ lpcr &= ~(LPCR_VPM0 | LPCR_VRMA_L);
+ lpcr |= rmls << LPCR_RMLS_SH;
+ kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT;
+ }
kvm->arch.lpcr = lpcr;
- kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT;
pr_info("Using RMO at %lx size %lx (LPCR = %lx)\n",
ri->base_pfn << PAGE_SHIFT, rma_size, lpcr);
}
@@ -1151,11 +1175,25 @@ int kvmppc_core_init_vm(struct kvm *kvm)
kvm->arch.rma = NULL;
kvm->arch.n_rma_pages = 0;
- lpcr = kvm->arch.host_lpcr & (LPCR_PECE | LPCR_LPES);
- lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE |
- LPCR_VPM0 | LPCR_VRMA_L;
- kvm->arch.lpcr = lpcr;
+ kvm->arch.host_sdr1 = mfspr(SPRN_SDR1);
+ if (cpu_has_feature(CPU_FTR_ARCH_201)) {
+ /* PPC970; HID4 is effectively the LPCR */
+ unsigned long lpid = kvm->arch.lpid;
+ kvm->arch.host_lpid = 0;
+ kvm->arch.host_lpcr = lpcr = mfspr(SPRN_HID4);
+ lpcr &= ~((3 << HID4_LPID1_SH) | (0xful << HID4_LPID5_SH));
+ lpcr |= ((lpid >> 4) << HID4_LPID1_SH) |
+ ((lpid & 0xf) << HID4_LPID5_SH);
+ } else {
+ /* POWER7; init LPCR for virtual RMA mode */
+ kvm->arch.host_lpid = mfspr(SPRN_LPID);
+ kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR);
+ lpcr &= LPCR_PECE | LPCR_LPES;
+ lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE |
+ LPCR_VPM0 | LPCR_VRMA_L;
+ }
+ kvm->arch.lpcr = lpcr;
return 0;
diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c b/arch/powerpc/kvm/book3s_hv_builtin.c
index 7315ec6e8177..d43120355eec 100644
--- a/arch/powerpc/kvm/book3s_hv_builtin.c
+++ b/arch/powerpc/kvm/book3s_hv_builtin.c
@@ -55,12 +55,14 @@ static LIST_HEAD(free_rmas);
static DEFINE_SPINLOCK(rma_lock);
/* Work out RMLS (real mode limit selector) field value for a given RMA size.
- Assumes POWER7. */
+ Assumes POWER7 or PPC970. */
static inline int lpcr_rmls(unsigned long rma_size)
{
switch (rma_size) {
case 32ul << 20: /* 32 MB */
- return 8;
+ if (cpu_has_feature(CPU_FTR_ARCH_206))
+ return 8; /* only supported on POWER7 */
+ return -1;
case 64ul << 20: /* 64 MB */
return 3;
case 128ul << 20: /* 128 MB */
@@ -90,8 +92,9 @@ void kvm_rma_init(void)
void *rma;
struct page *pg;
- /* Only do this in HV mode */
- if (!cpu_has_feature(CPU_FTR_HVMODE))
+ /* Only do this on PPC970 in HV mode */
+ if (!cpu_has_feature(CPU_FTR_HVMODE) ||
+ !cpu_has_feature(CPU_FTR_ARCH_201))
return;
if (!kvm_rma_size || !kvm_rma_count)
diff --git a/arch/powerpc/kvm/book3s_hv_interrupts.S b/arch/powerpc/kvm/book3s_hv_interrupts.S
index 532afaf19841..3f7b674dd4bf 100644
--- a/arch/powerpc/kvm/book3s_hv_interrupts.S
+++ b/arch/powerpc/kvm/book3s_hv_interrupts.S
@@ -50,8 +50,10 @@ _GLOBAL(__kvmppc_vcore_entry)
SAVE_NVGPRS(r1)
/* Save host DSCR */
+BEGIN_FTR_SECTION
mfspr r3, SPRN_DSCR
std r3, HSTATE_DSCR(r13)
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
/* Save host DABR */
mfspr r3, SPRN_DABR
@@ -86,12 +88,20 @@ _GLOBAL(__kvmppc_vcore_entry)
mfspr r7, SPRN_PMC4
mfspr r8, SPRN_PMC5
mfspr r9, SPRN_PMC6
+BEGIN_FTR_SECTION
+ mfspr r10, SPRN_PMC7
+ mfspr r11, SPRN_PMC8
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
stw r3, HSTATE_PMC(r13)
stw r5, HSTATE_PMC + 4(r13)
stw r6, HSTATE_PMC + 8(r13)
stw r7, HSTATE_PMC + 12(r13)
stw r8, HSTATE_PMC + 16(r13)
stw r9, HSTATE_PMC + 20(r13)
+BEGIN_FTR_SECTION
+ stw r10, HSTATE_PMC + 24(r13)
+ stw r11, HSTATE_PMC + 28(r13)
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
31:
/*
@@ -105,6 +115,26 @@ _GLOBAL(__kvmppc_vcore_entry)
add r8,r8,r7
std r8,HSTATE_DECEXP(r13)
+ /*
+ * On PPC970, if the guest vcpu has an external interrupt pending,
+ * send ourselves an IPI so as to interrupt the guest once it
+ * enables interrupts. (It must have interrupts disabled,
+ * otherwise we would already have delivered the interrupt.)
+ */
+BEGIN_FTR_SECTION
+ ld r0, VCPU_PENDING_EXC(r4)
+ li r7, (1 << BOOK3S_IRQPRIO_EXTERNAL)
+ oris r7, r7, (1 << BOOK3S_IRQPRIO_EXTERNAL_LEVEL)@h
+ and. r0, r0, r7
+ beq 32f
+ mr r31, r4
+ lhz r3, PACAPACAINDEX(r13)
+ bl smp_send_reschedule
+ nop
+ mr r4, r31
+32:
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
+
/* Jump to partition switch code */
bl .kvmppc_hv_entry_trampoline
nop
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index edb0aae901a3..fcfe6b055558 100644
--- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
+++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
@@ -56,7 +56,8 @@ long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
/* only handle 4k, 64k and 16M pages for now */
porder = 12;
if (pteh & HPTE_V_LARGE) {
- if ((ptel & 0xf000) == 0x1000) {
+ if (cpu_has_feature(CPU_FTR_ARCH_206) &&
+ (ptel & 0xf000) == 0x1000) {
/* 64k page */
porder = 16;
} else if ((ptel & 0xff000) == 0) {
@@ -126,7 +127,8 @@ static unsigned long compute_tlbie_rb(unsigned long v, unsigned long r,
va_low &= 0x7ff;
if (v & HPTE_V_LARGE) {
rb |= 1; /* L field */
- if (r & 0xff000) {
+ if (cpu_has_feature(CPU_FTR_ARCH_206) &&
+ (r & 0xff000)) {
/* non-16MB large page, must be 64k */
/* (masks depend on page size) */
rb |= 0x1000; /* page encoding in LP field */
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 9ee223c35285..6dd33581a228 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -148,12 +148,20 @@ kvmppc_hv_entry:
lwz r7, VCPU_PMC + 12(r4)
lwz r8, VCPU_PMC + 16(r4)
lwz r9, VCPU_PMC + 20(r4)
+BEGIN_FTR_SECTION
+ lwz r10, VCPU_PMC + 24(r4)
+ lwz r11, VCPU_PMC + 28(r4)
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
mtspr SPRN_PMC1, r3
mtspr SPRN_PMC2, r5
mtspr SPRN_PMC3, r6
mtspr SPRN_PMC4, r7
mtspr SPRN_PMC5, r8
mtspr SPRN_PMC6, r9
+BEGIN_FTR_SECTION
+ mtspr SPRN_PMC7, r10
+ mtspr SPRN_PMC8, r11
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
ld r3, VCPU_MMCR(r4)
ld r5, VCPU_MMCR + 8(r4)
ld r6, VCPU_MMCR + 16(r4)
@@ -165,9 +173,11 @@ kvmppc_hv_entry:
/* Load up FP, VMX and VSX registers */
bl kvmppc_load_fp
+BEGIN_FTR_SECTION
/* Switch DSCR to guest value */
ld r5, VCPU_DSCR(r4)
mtspr SPRN_DSCR, r5
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
/*
* Set the decrementer to the guest decrementer.
@@ -210,6 +220,7 @@ kvmppc_hv_entry:
mtspr SPRN_DABRX,r5
mtspr SPRN_DABR,r6
+BEGIN_FTR_SECTION
/* Restore AMR and UAMOR, set AMOR to all 1s */
ld r5,VCPU_AMR(r4)
ld r6,VCPU_UAMOR(r4)
@@ -217,6 +228,7 @@ kvmppc_hv_entry:
mtspr SPRN_AMR,r5
mtspr SPRN_UAMOR,r6
mtspr SPRN_AMOR,r7
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
/* Clear out SLB */
li r6,0
@@ -224,6 +236,14 @@ kvmppc_hv_entry:
slbia
ptesync
+BEGIN_FTR_SECTION
+ b 30f
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
+ /*
+ * POWER7 host -> guest partition switch code.
+ * We don't have to lock against concurrent tlbies,
+ * but we do have to coordinate across hardware threads.
+ */
/* Increment entry count iff exit count is zero. */
ld r5,HSTATE_KVM_VCORE(r13)
addi r9,r5,VCORE_ENTRY_EXIT
@@ -315,9 +335,94 @@ kvmppc_hv_entry:
ld r8,VCPU_SPURR(r4)
mtspr SPRN_PURR,r7
mtspr SPRN_SPURR,r8
+ b 31f
+
+ /*
+ * PPC970 host -> guest partition switch code.
+ * We have to lock against concurrent tlbies,
+ * using native_tlbie_lock to lock against host tlbies
+ * and kvm->arch.tlbie_lock to lock against guest tlbies.
+ * We also have to invalidate the TLB since its
+ * entries aren't tagged with the LPID.
+ */
+30: ld r9,VCPU_KVM(r4) /* pointer to struct kvm */
+
+ /* first take native_tlbie_lock */
+ .section ".toc","aw"
+toc_tlbie_lock:
+ .tc native_tlbie_lock[TC],native_tlbie_lock
+ .previous
+ ld r3,toc_tlbie_lock@toc(2)
+ lwz r8,PACA_LOCK_TOKEN(r13)
+24: lwarx r0,0,r3
+ cmpwi r0,0
+ bne 24b
+ stwcx. r8,0,r3
+ bne 24b
+ isync
+
+ ld r7,KVM_LPCR(r9) /* use kvm->arch.lpcr to store HID4 */
+ li r0,0x18f
+ rotldi r0,r0,HID4_LPID5_SH /* all lpid bits in HID4 = 1 */
+ or r0,r7,r0
+ ptesync
+ sync
+ mtspr SPRN_HID4,r0 /* switch to reserved LPID */
+ isync
+ li r0,0
+ stw r0,0(r3) /* drop native_tlbie_lock */
+
+ /* invalidate the whole TLB */
+ li r0,256
+ mtctr r0
+ li r6,0
+25: tlbiel r6
+ addi r6,r6,0x1000
+ bdnz 25b
+ ptesync
+
+ /* Take the guest's tlbie_lock */
+ addi r3,r9,KVM_TLBIE_LOCK
+24: lwarx r0,0,r3
+ cmpwi r0,0
+ bne 24b
+ stwcx. r8,0,r3
+ bne 24b
+ isync
+ ld r6,KVM_SDR1(r9)
+ mtspr SPRN_SDR1,r6 /* switch to partition page table */
+
+ /* Set up HID4 with the guest's LPID etc. */
+ sync
+ mtspr SPRN_HID4,r7
+ isync
+
+ /* drop the guest's tlbie_lock */
+ li r0,0
+ stw r0,0(r3)
+
+ /* Check if HDEC expires soon */
+ mfspr r3,SPRN_HDEC
+ cmpwi r3,10
+ li r12,BOOK3S_INTERRUPT_HV_DECREMENTER
+ mr r9,r4
+ blt hdec_soon
+
+ /* Enable HDEC interrupts */
+ mfspr r0,SPRN_HID0
+ li r3,1
+ rldimi r0,r3, HID0_HDICE_SH, 64-HID0_HDICE_SH-1
+ sync
+ mtspr SPRN_HID0,r0
+ mfspr r0,SPRN_HID0
+ mfspr r0,SPRN_HID0
+ mfspr r0,SPRN_HID0
+ mfspr r0,SPRN_HID0
+ mfspr r0,SPRN_HID0
+ mfspr r0,SPRN_HID0
/* Load up guest SLB entries */
- lwz r5,VCPU_SLB_MAX(r4)
+31: lwz r5,VCPU_SLB_MAX(r4)
cmpwi r5,0
beq 9f
mtctr r5
@@ -472,6 +577,7 @@ kvmppc_interrupt:
hcall_real_cont:
/* Check for mediated interrupts (could be done earlier really ...) */
+BEGIN_FTR_SECTION
cmpwi r12,BOOK3S_INTERRUPT_EXTERNAL
bne+ 1f
ld r5,VCPU_KVM(r9)
@@ -481,6 +587,7 @@ hcall_real_cont:
andi. r0,r5,LPCR_MER
bne bounce_ext_interrupt
1:
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
/* Save DEC */
mfspr r5,SPRN_DEC
@@ -492,9 +599,11 @@ hcall_real_cont:
/* Save HEIR (HV emulation assist reg) in last_inst
if this is an HEI (HV emulation interrupt, e40) */
li r3,-1
+BEGIN_FTR_SECTION
cmpwi r12,BOOK3S_INTERRUPT_H_EMUL_ASSIST
bne 11f
mfspr r3,SPRN_HEIR
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
11: stw r3,VCPU_LAST_INST(r9)
/* Save more register state */
@@ -508,8 +617,10 @@ hcall_real_cont:
stw r7, VCPU_DSISR(r9)
std r8, VCPU_CTR(r9)
/* grab HDAR & HDSISR if HV data storage interrupt (HDSI) */
+BEGIN_FTR_SECTION
cmpwi r12,BOOK3S_INTERRUPT_H_DATA_STORAGE
beq 6f
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
7: std r6, VCPU_FAULT_DAR(r9)
stw r7, VCPU_FAULT_DSISR(r9)
@@ -543,6 +654,7 @@ hcall_real_cont:
/*
* Save the guest PURR/SPURR
*/
+BEGIN_FTR_SECTION
mfspr r5,SPRN_PURR
mfspr r6,SPRN_SPURR
ld r7,VCPU_PURR(r9)
@@ -562,6 +674,7 @@ hcall_real_cont:
add r4,r4,r6
mtspr SPRN_PURR,r3
mtspr SPRN_SPURR,r4
+END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_201)
/* Clear out SLB */
li r5,0
@@ -570,6 +683,14 @@ hcall_real_cont:
ptesync
hdec_soon:
+BEGIN_FTR_SECTION
+ b 32f
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
+ /*
+ * POWER7 guest -> host partition switch code.
+ * We don't have to lock against tlbies but we do
+ * have to coordinate the hardware threads.
+ */
/* Increment the threads-exiting-guest count in the 0xff00
bits of vcore->entry_exit_count */
lwsync
@@ -640,9 +761,82 @@ hdec_soon:
16: ld r8,KVM_HOST_LPCR(r4)
mtspr SPRN_LPCR,r8
isync
+ b 33f
+
+ /*
+ * PPC970 guest -> host partition switch code.
+ * We have to lock against concurrent tlbies, and
+ * we have to flush the whole TLB.
+ */
+32: ld r4,VCPU_KVM(r9) /* pointer to struct kvm */
+
+ /* Take the guest's tlbie_lock */
+ lwz r8,PACA_LOCK_TOKEN(r13)
+ addi r3,r4,KVM_TLBIE_LOCK
+24: lwarx r0,0,r3
+ cmpwi r0,0
+ bne 24b
+ stwcx. r8,0,r3
+ bne 24b
+ isync
+
+ ld r7,KVM_HOST_LPCR(r4) /* use kvm->arch.host_lpcr for HID4 */
+ li r0,0x18f
+ rotldi r0,r0,HID4_LPID5_SH /* all lpid bits in HID4 = 1 */
+ or r0,r7,r0
+ ptesync
+ sync
+ mtspr SPRN_HID4,r0 /* switch to reserved LPID */
+ isync
+ li r0,0
+ stw r0,0(r3) /* drop guest tlbie_lock */
+
+ /* invalidate the whole TLB */
+ li r0,256
+ mtctr r0
+ li r6,0
+25: tlbiel r6
+ addi r6,r6,0x1000
+ bdnz 25b
+ ptesync
+
+ /* take native_tlbie_lock */
+ ld r3,toc_tlbie_lock@toc(2)
+24: lwarx r0,0,r3
+ cmpwi r0,0
+ bne 24b
+ stwcx. r8,0,r3
+ bne 24b
+ isync
+
+ ld r6,KVM_HOST_SDR1(r4)
+ mtspr SPRN_SDR1,r6 /* switch to host page table */
+
+ /* Set up host HID4 value */
+ sync
+ mtspr SPRN_HID4,r7
+ isync
+ li r0,0
+ stw r0,0(r3) /* drop native_tlbie_lock */
+
+ lis r8,0x7fff /* MAX_INT@h */
+ mtspr SPRN_HDEC,r8
+
+ /* Disable HDEC interrupts */
+ mfspr r0,SPRN_HID0
+ li r3,0
+ rldimi r0,r3, HID0_HDICE_SH, 64-HID0_HDICE_SH-1
+ sync
+ mtspr SPRN_HID0,r0
+ mfspr r0,SPRN_HID0
+ mfspr r0,SPRN_HID0
+ mfspr r0,SPRN_HID0
+ mfspr r0,SPRN_HID0
+ mfspr r0,SPRN_HID0
+ mfspr r0,SPRN_HID0
/* load host SLB entries */
- ld r8,PACA_SLBSHADOWPTR(r13)
+33: ld r8,PACA_SLBSHADOWPTR(r13)
.rept SLB_NUM_BOLTED
ld r5,SLBSHADOW_SAVEAREA(r8)
@@ -654,12 +848,14 @@ hdec_soon:
.endr
/* Save and reset AMR and UAMOR before turning on the MMU */
+BEGIN_FTR_SECTION
mfspr r5,SPRN_AMR
mfspr r6,SPRN_UAMOR
std r5,VCPU_AMR(r9)
std r6,VCPU_UAMOR(r9)
li r6,0
mtspr SPRN_AMR,r6
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
/* Restore host DABR and DABRX */
ld r5,HSTATE_DABR(r13)
@@ -668,10 +864,12 @@ hdec_soon:
mtspr SPRN_DABRX,r6
/* Switch DSCR back to host value */
+BEGIN_FTR_SECTION
mfspr r8, SPRN_DSCR
ld r7, HSTATE_DSCR(r13)
std r8, VCPU_DSCR(r7)
mtspr SPRN_DSCR, r7
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
/* Save non-volatile GPRs */
std r14, VCPU_GPR(r14)(r9)
@@ -735,21 +933,31 @@ hdec_soon:
mfspr r6, SPRN_PMC4
mfspr r7, SPRN_PMC5
mfspr r8, SPRN_PMC6
+BEGIN_FTR_SECTION
+ mfspr r10, SPRN_PMC7
+ mfspr r11, SPRN_PMC8
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
stw r3, VCPU_PMC(r9)
stw r4, VCPU_PMC + 4(r9)
stw r5, VCPU_PMC + 8(r9)
stw r6, VCPU_PMC + 12(r9)
stw r7, VCPU_PMC + 16(r9)
stw r8, VCPU_PMC + 20(r9)
+BEGIN_FTR_SECTION
+ stw r10, VCPU_PMC + 24(r9)
+ stw r11, VCPU_PMC + 28(r9)
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
22:
/* save FP state */
mr r3, r9
bl .kvmppc_save_fp
- /* Secondary threads go off to take a nap */
+ /* Secondary threads go off to take a nap on POWER7 */
+BEGIN_FTR_SECTION
lwz r0,VCPU_PTID(r3)
cmpwi r0,0
bne secondary_nap
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
/*
* Reload DEC. HDEC interrupts were disabled when
@@ -771,12 +979,20 @@ hdec_soon:
lwz r6, HSTATE_PMC + 12(r13)
lwz r8, HSTATE_PMC + 16(r13)
lwz r9, HSTATE_PMC + 20(r13)
+BEGIN_FTR_SECTION
+ lwz r10, HSTATE_PMC + 24(r13)
+ lwz r11, HSTATE_PMC + 28(r13)
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
mtspr SPRN_PMC1, r3
mtspr SPRN_PMC2, r4
mtspr SPRN_PMC3, r5
mtspr SPRN_PMC4, r6
mtspr SPRN_PMC5, r8
mtspr SPRN_PMC6, r9
+BEGIN_FTR_SECTION
+ mtspr SPRN_PMC7, r10
+ mtspr SPRN_PMC8, r11
+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)
@@ -802,7 +1018,7 @@ hdec_soon:
cmpwi r12, BOOK3S_INTERRUPT_MACHINE_CHECK
/* RFI into the highmem handler, or branch to interrupt handler */
- mfmsr r6
+12: mfmsr r6
mtctr r12
li r0, MSR_RI
andc r6, r6, r0
@@ -812,7 +1028,11 @@ hdec_soon:
beqctr
RFI
-11: mtspr SPRN_HSRR0, r8
+11:
+BEGIN_FTR_SECTION
+ b 12b
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
+ mtspr SPRN_HSRR0, r8
mtspr SPRN_HSRR1, r7
ba 0x500
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 72c506505fa4..a107c9be0fb1 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -213,6 +213,9 @@ int kvm_dev_ioctl_check_extension(long ext)
break;
case KVM_CAP_PPC_RMA:
r = 1;
+ /* PPC970 requires an RMA */
+ if (cpu_has_feature(CPU_FTR_ARCH_201))
+ r = 2;
break;
#endif
default:
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-19 11:25:11 +0000