Merge remote-tracking branch 'origin/next' into kvm-ppc-next
Conflicts:
mm/Kconfig
CMA DMA split and ZSWAP introduction were conflicting, fix up manually.
diff --git a/arch/arm/include/asm/dma-contiguous.h b/arch/arm/include/asm/dma-contiguous.h
index 3ed37b4..e072bb2 100644
--- a/arch/arm/include/asm/dma-contiguous.h
+++ b/arch/arm/include/asm/dma-contiguous.h
@@ -2,7 +2,7 @@
#define ASMARM_DMA_CONTIGUOUS_H
#ifdef __KERNEL__
-#ifdef CONFIG_CMA
+#ifdef CONFIG_DMA_CMA
#include <linux/types.h>
#include <asm-generic/dma-contiguous.h>
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 7f9b179..dbddc07 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -358,7 +358,7 @@
if (!pages)
goto no_pages;
- if (IS_ENABLED(CONFIG_CMA))
+ if (IS_ENABLED(CONFIG_DMA_CMA))
ptr = __alloc_from_contiguous(NULL, pool->size, prot, &page,
atomic_pool_init);
else
@@ -670,7 +670,7 @@
addr = __alloc_simple_buffer(dev, size, gfp, &page);
else if (!(gfp & __GFP_WAIT))
addr = __alloc_from_pool(size, &page);
- else if (!IS_ENABLED(CONFIG_CMA))
+ else if (!IS_ENABLED(CONFIG_DMA_CMA))
addr = __alloc_remap_buffer(dev, size, gfp, prot, &page, caller);
else
addr = __alloc_from_contiguous(dev, size, prot, &page, caller);
@@ -759,7 +759,7 @@
__dma_free_buffer(page, size);
} else if (__free_from_pool(cpu_addr, size)) {
return;
- } else if (!IS_ENABLED(CONFIG_CMA)) {
+ } else if (!IS_ENABLED(CONFIG_DMA_CMA)) {
__dma_free_remap(cpu_addr, size);
__dma_free_buffer(page, size);
} else {
diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h
index 08891d0..fa19e2f 100644
--- a/arch/powerpc/include/asm/kvm_book3s.h
+++ b/arch/powerpc/include/asm/kvm_book3s.h
@@ -334,6 +334,27 @@
return r;
}
+/*
+ * Like kvmppc_get_last_inst(), but for fetching a sc instruction.
+ * Because the sc instruction sets SRR0 to point to the following
+ * instruction, we have to fetch from pc - 4.
+ */
+static inline u32 kvmppc_get_last_sc(struct kvm_vcpu *vcpu)
+{
+ ulong pc = kvmppc_get_pc(vcpu) - 4;
+ struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
+ u32 r;
+
+ /* Load the instruction manually if it failed to do so in the
+ * exit path */
+ if (svcpu->last_inst == KVM_INST_FETCH_FAILED)
+ kvmppc_ld(vcpu, &pc, sizeof(u32), &svcpu->last_inst, false);
+
+ r = svcpu->last_inst;
+ svcpu_put(svcpu);
+ return r;
+}
+
static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
{
struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
@@ -446,6 +467,23 @@
return vcpu->arch.last_inst;
}
+/*
+ * Like kvmppc_get_last_inst(), but for fetching a sc instruction.
+ * Because the sc instruction sets SRR0 to point to the following
+ * instruction, we have to fetch from pc - 4.
+ */
+static inline u32 kvmppc_get_last_sc(struct kvm_vcpu *vcpu)
+{
+ ulong pc = kvmppc_get_pc(vcpu) - 4;
+
+ /* Load the instruction manually if it failed to do so in the
+ * exit path */
+ if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
+ kvmppc_ld(vcpu, &pc, sizeof(u32), &vcpu->arch.last_inst, false);
+
+ return vcpu->arch.last_inst;
+}
+
static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
{
return vcpu->arch.fault_dar;
diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h
index a1ecb14..86d638a 100644
--- a/arch/powerpc/include/asm/kvm_book3s_64.h
+++ b/arch/powerpc/include/asm/kvm_book3s_64.h
@@ -37,7 +37,7 @@
#ifdef CONFIG_KVM_BOOK3S_64_HV
#define KVM_DEFAULT_HPT_ORDER 24 /* 16MB HPT by default */
-extern int kvm_hpt_order; /* order of preallocated HPTs */
+extern unsigned long kvm_rma_pages;
#endif
#define VRMA_VSID 0x1ffffffUL /* 1TB VSID reserved for VRMA */
@@ -100,7 +100,7 @@
/* (masks depend on page size) */
rb |= 0x1000; /* page encoding in LP field */
rb |= (va_low & 0x7f) << 16; /* 7b of VA in AVA/LP field */
- rb |= (va_low & 0xfe); /* AVAL field (P7 doesn't seem to care) */
+ rb |= ((va_low << 4) & 0xf0); /* AVAL field (P7 doesn't seem to care) */
}
} else {
/* 4kB page */
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index af326cd..3328353 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -183,13 +183,9 @@
struct page *pages[0];
};
-struct kvmppc_linear_info {
- void *base_virt;
- unsigned long base_pfn;
- unsigned long npages;
- struct list_head list;
- atomic_t use_count;
- int type;
+struct kvm_rma_info {
+ atomic_t use_count;
+ unsigned long base_pfn;
};
/* XICS components, defined in book3s_xics.c */
@@ -246,7 +242,7 @@
int tlbie_lock;
unsigned long lpcr;
unsigned long rmor;
- struct kvmppc_linear_info *rma;
+ struct kvm_rma_info *rma;
unsigned long vrma_slb_v;
int rma_setup_done;
int using_mmu_notifiers;
@@ -259,7 +255,7 @@
spinlock_t slot_phys_lock;
cpumask_t need_tlb_flush;
struct kvmppc_vcore *vcores[KVM_MAX_VCORES];
- struct kvmppc_linear_info *hpt_li;
+ int hpt_cma_alloc;
#endif /* CONFIG_KVM_BOOK3S_64_HV */
#ifdef CONFIG_PPC_BOOK3S_64
struct list_head spapr_tce_tables;
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index a5287fe..b15554a 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -137,10 +137,10 @@
unsigned long ioba, unsigned long tce);
extern long kvm_vm_ioctl_allocate_rma(struct kvm *kvm,
struct kvm_allocate_rma *rma);
-extern struct kvmppc_linear_info *kvm_alloc_rma(void);
-extern void kvm_release_rma(struct kvmppc_linear_info *ri);
-extern struct kvmppc_linear_info *kvm_alloc_hpt(void);
-extern void kvm_release_hpt(struct kvmppc_linear_info *li);
+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);
+extern void kvm_release_hpt(struct page *page, unsigned long nr_pages);
extern int kvmppc_core_init_vm(struct kvm *kvm);
extern void kvmppc_core_destroy_vm(struct kvm *kvm);
extern void kvmppc_core_free_memslot(struct kvm_memory_slot *free,
@@ -261,6 +261,7 @@
struct openpic;
#ifdef CONFIG_KVM_BOOK3S_64_HV
+extern void kvm_cma_reserve(void) __init;
static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
{
paca[cpu].kvm_hstate.xics_phys = addr;
@@ -281,13 +282,12 @@
}
extern void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu);
-extern void kvm_linear_init(void);
#else
-static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
+static inline void __init kvm_cma_reserve(void)
{}
-static inline void kvm_linear_init(void)
+static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
{}
static inline u32 kvmppc_get_xics_latch(void)
@@ -394,10 +394,15 @@
}
}
-/* Please call after prepare_to_enter. This function puts the lazy ee state
- back to normal mode, without actually enabling interrupts. */
-static inline void kvmppc_lazy_ee_enable(void)
+/*
+ * Please call after prepare_to_enter. This function puts the lazy ee and irq
+ * disabled tracking state back to normal mode, without actually enabling
+ * interrupts.
+ */
+static inline void kvmppc_fix_ee_before_entry(void)
{
+ trace_hardirqs_on();
+
#ifdef CONFIG_PPC64
/* Only need to enable IRQs by hard enabling them after this */
local_paca->irq_happened = 0;
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index c7e8afc..26098c2 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -451,6 +451,7 @@
DEFINE(VCPU_SPRG2, offsetof(struct kvm_vcpu, arch.shregs.sprg2));
DEFINE(VCPU_SPRG3, offsetof(struct kvm_vcpu, arch.shregs.sprg3));
#endif
+ DEFINE(VCPU_SHARED_SPRG3, offsetof(struct kvm_vcpu_arch_shared, sprg3));
DEFINE(VCPU_SHARED_SPRG4, offsetof(struct kvm_vcpu_arch_shared, sprg4));
DEFINE(VCPU_SHARED_SPRG5, offsetof(struct kvm_vcpu_arch_shared, sprg5));
DEFINE(VCPU_SHARED_SPRG6, offsetof(struct kvm_vcpu_arch_shared, sprg6));
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 389fb807..fe6a58c 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -229,6 +229,8 @@
/* Initialize the hash table or TLB handling */
early_init_mmu();
+ kvm_cma_reserve();
+
/*
* Reserve any gigantic pages requested on the command line.
* memblock needs to have been initialized by the time this is
@@ -609,8 +611,6 @@
/* Initialize the MMU context management stuff */
mmu_context_init();
- kvm_linear_init();
-
/* Interrupt code needs to be 64K-aligned */
if ((unsigned long)_stext & 0xffff)
panic("Kernelbase not 64K-aligned (0x%lx)!\n",
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index eb643f8..ffaef2c 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -72,6 +72,7 @@
bool "KVM support for POWER7 and PPC970 using hypervisor mode in host"
depends on KVM_BOOK3S_64
select MMU_NOTIFIER
+ select CMA
---help---
Support running unmodified book3s_64 guest kernels in
virtual machines on POWER7 and PPC970 processors that have
diff --git a/arch/powerpc/kvm/Makefile b/arch/powerpc/kvm/Makefile
index 008cd85..6646c95 100644
--- a/arch/powerpc/kvm/Makefile
+++ b/arch/powerpc/kvm/Makefile
@@ -81,6 +81,7 @@
book3s_64_vio_hv.o \
book3s_hv_ras.o \
book3s_hv_builtin.o \
+ book3s_hv_cma.o \
$(kvm-book3s_64-builtin-xics-objs-y)
kvm-book3s_64-objs-$(CONFIG_KVM_XICS) += \
diff --git a/arch/powerpc/kvm/book3s_64_mmu.c b/arch/powerpc/kvm/book3s_64_mmu.c
index 739bfba..7e345e0 100644
--- a/arch/powerpc/kvm/book3s_64_mmu.c
+++ b/arch/powerpc/kvm/book3s_64_mmu.c
@@ -182,10 +182,13 @@
hva_t ptegp;
u64 pteg[16];
u64 avpn = 0;
+ u64 v, r;
+ u64 v_val, v_mask;
+ u64 eaddr_mask;
int i;
- u8 key = 0;
+ u8 pp, key = 0;
bool found = false;
- int second = 0;
+ bool second = false;
ulong mp_ea = vcpu->arch.magic_page_ea;
/* Magic page override */
@@ -208,8 +211,16 @@
goto no_seg_found;
avpn = kvmppc_mmu_book3s_64_get_avpn(slbe, eaddr);
+ v_val = avpn & HPTE_V_AVPN;
+
if (slbe->tb)
- avpn |= SLB_VSID_B_1T;
+ v_val |= SLB_VSID_B_1T;
+ if (slbe->large)
+ v_val |= HPTE_V_LARGE;
+ v_val |= HPTE_V_VALID;
+
+ v_mask = SLB_VSID_B | HPTE_V_AVPN | HPTE_V_LARGE | HPTE_V_VALID |
+ HPTE_V_SECONDARY;
do_second:
ptegp = kvmppc_mmu_book3s_64_get_pteg(vcpu_book3s, slbe, eaddr, second);
@@ -227,90 +238,73 @@
key = 4;
for (i=0; i<16; i+=2) {
- u64 v = pteg[i];
- u64 r = pteg[i+1];
-
- /* Valid check */
- if (!(v & HPTE_V_VALID))
- continue;
- /* Hash check */
- if ((v & HPTE_V_SECONDARY) != second)
- continue;
-
- /* AVPN compare */
- if (HPTE_V_COMPARE(avpn, v)) {
- u8 pp = (r & HPTE_R_PP) | key;
- int eaddr_mask = 0xFFF;
-
- gpte->eaddr = eaddr;
- gpte->vpage = kvmppc_mmu_book3s_64_ea_to_vp(vcpu,
- eaddr,
- data);
- if (slbe->large)
- eaddr_mask = 0xFFFFFF;
- gpte->raddr = (r & HPTE_R_RPN) | (eaddr & eaddr_mask);
- gpte->may_execute = ((r & HPTE_R_N) ? false : true);
- gpte->may_read = false;
- gpte->may_write = false;
-
- switch (pp) {
- case 0:
- case 1:
- case 2:
- case 6:
- gpte->may_write = true;
- /* fall through */
- case 3:
- case 5:
- case 7:
- gpte->may_read = true;
- break;
- }
-
- dprintk("KVM MMU: Translated 0x%lx [0x%llx] -> 0x%llx "
- "-> 0x%lx\n",
- eaddr, avpn, gpte->vpage, gpte->raddr);
+ /* Check all relevant fields of 1st dword */
+ if ((pteg[i] & v_mask) == v_val) {
found = true;
break;
}
}
+ if (!found) {
+ if (second)
+ goto no_page_found;
+ v_val |= HPTE_V_SECONDARY;
+ second = true;
+ goto do_second;
+ }
+
+ v = pteg[i];
+ r = pteg[i+1];
+ pp = (r & HPTE_R_PP) | key;
+ eaddr_mask = 0xFFF;
+
+ gpte->eaddr = eaddr;
+ gpte->vpage = kvmppc_mmu_book3s_64_ea_to_vp(vcpu, eaddr, data);
+ if (slbe->large)
+ eaddr_mask = 0xFFFFFF;
+ gpte->raddr = (r & HPTE_R_RPN & ~eaddr_mask) | (eaddr & eaddr_mask);
+ gpte->may_execute = ((r & HPTE_R_N) ? false : true);
+ gpte->may_read = false;
+ gpte->may_write = false;
+
+ switch (pp) {
+ case 0:
+ case 1:
+ case 2:
+ case 6:
+ gpte->may_write = true;
+ /* fall through */
+ case 3:
+ case 5:
+ case 7:
+ gpte->may_read = true;
+ break;
+ }
+
+ dprintk("KVM MMU: Translated 0x%lx [0x%llx] -> 0x%llx "
+ "-> 0x%lx\n",
+ eaddr, avpn, gpte->vpage, gpte->raddr);
+
/* Update PTE R and C bits, so the guest's swapper knows we used the
* page */
- if (found) {
- u32 oldr = pteg[i+1];
-
- if (gpte->may_read) {
- /* Set the accessed flag */
- pteg[i+1] |= HPTE_R_R;
- }
- if (gpte->may_write) {
- /* Set the dirty flag */
- pteg[i+1] |= HPTE_R_C;
- } else {
- dprintk("KVM: Mapping read-only page!\n");
- }
-
- /* Write back into the PTEG */
- if (pteg[i+1] != oldr)
- copy_to_user((void __user *)ptegp, pteg, sizeof(pteg));
-
- if (!gpte->may_read)
- return -EPERM;
- return 0;
- } else {
- dprintk("KVM MMU: No PTE found (ea=0x%lx sdr1=0x%llx "
- "ptegp=0x%lx)\n",
- eaddr, to_book3s(vcpu)->sdr1, ptegp);
- for (i = 0; i < 16; i += 2)
- dprintk(" %02d: 0x%llx - 0x%llx (0x%llx)\n",
- i, pteg[i], pteg[i+1], avpn);
-
- if (!second) {
- second = HPTE_V_SECONDARY;
- goto do_second;
- }
+ if (gpte->may_read) {
+ /* Set the accessed flag */
+ r |= HPTE_R_R;
}
+ if (data && gpte->may_write) {
+ /* Set the dirty flag -- XXX even if not writing */
+ r |= HPTE_R_C;
+ }
+
+ /* Write back into the PTEG */
+ if (pteg[i+1] != r) {
+ pteg[i+1] = r;
+ copy_to_user((void __user *)ptegp, pteg, sizeof(pteg));
+ }
+
+ if (!gpte->may_read)
+ return -EPERM;
+ return 0;
no_page_found:
return -ENOENT;
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 710d313..b7a1911 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -37,6 +37,8 @@
#include <asm/ppc-opcode.h>
#include <asm/cputable.h>
+#include "book3s_hv_cma.h"
+
/* POWER7 has 10-bit LPIDs, PPC970 has 6-bit LPIDs */
#define MAX_LPID_970 63
@@ -52,8 +54,8 @@
{
unsigned long hpt;
struct revmap_entry *rev;
- struct kvmppc_linear_info *li;
- long order = kvm_hpt_order;
+ struct page *page = NULL;
+ long order = KVM_DEFAULT_HPT_ORDER;
if (htab_orderp) {
order = *htab_orderp;
@@ -61,26 +63,23 @@
order = PPC_MIN_HPT_ORDER;
}
+ kvm->arch.hpt_cma_alloc = 0;
/*
- * If the user wants a different size from default,
* try first to allocate it from the kernel page allocator.
+ * We keep the CMA reserved for failed allocation.
*/
- hpt = 0;
- if (order != kvm_hpt_order) {
- hpt = __get_free_pages(GFP_KERNEL|__GFP_ZERO|__GFP_REPEAT|
- __GFP_NOWARN, order - PAGE_SHIFT);
- if (!hpt)
- --order;
- }
+ hpt = __get_free_pages(GFP_KERNEL | __GFP_ZERO | __GFP_REPEAT |
+ __GFP_NOWARN, order - PAGE_SHIFT);
/* Next try to allocate from the preallocated pool */
if (!hpt) {
- li = kvm_alloc_hpt();
- if (li) {
- hpt = (ulong)li->base_virt;
- kvm->arch.hpt_li = li;
- order = kvm_hpt_order;
- }
+ VM_BUG_ON(order < KVM_CMA_CHUNK_ORDER);
+ page = kvm_alloc_hpt(1 << (order - PAGE_SHIFT));
+ if (page) {
+ hpt = (unsigned long)pfn_to_kaddr(page_to_pfn(page));
+ kvm->arch.hpt_cma_alloc = 1;
+ } else
+ --order;
}
/* Lastly try successively smaller sizes from the page allocator */
@@ -118,8 +117,8 @@
return 0;
out_freehpt:
- if (kvm->arch.hpt_li)
- kvm_release_hpt(kvm->arch.hpt_li);
+ if (kvm->arch.hpt_cma_alloc)
+ kvm_release_hpt(page, 1 << (order - PAGE_SHIFT));
else
free_pages(hpt, order - PAGE_SHIFT);
return -ENOMEM;
@@ -165,8 +164,9 @@
{
kvmppc_free_lpid(kvm->arch.lpid);
vfree(kvm->arch.revmap);
- if (kvm->arch.hpt_li)
- kvm_release_hpt(kvm->arch.hpt_li);
+ if (kvm->arch.hpt_cma_alloc)
+ kvm_release_hpt(virt_to_page(kvm->arch.hpt_virt),
+ 1 << (kvm->arch.hpt_order - PAGE_SHIFT));
else
free_pages(kvm->arch.hpt_virt,
kvm->arch.hpt_order - PAGE_SHIFT);
diff --git a/arch/powerpc/kvm/book3s_emulate.c b/arch/powerpc/kvm/book3s_emulate.c
index 1f6344c..360ce68 100644
--- a/arch/powerpc/kvm/book3s_emulate.c
+++ b/arch/powerpc/kvm/book3s_emulate.c
@@ -458,6 +458,7 @@
case SPRN_PMC4_GEKKO:
case SPRN_WPAR_GEKKO:
case SPRN_MSSSR0:
+ case SPRN_DABR:
break;
unprivileged:
default:
@@ -555,6 +556,7 @@
case SPRN_PMC4_GEKKO:
case SPRN_WPAR_GEKKO:
case SPRN_MSSSR0:
+ case SPRN_DABR:
*spr_val = 0;
break;
default:
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 2efa9dd..8aadd23 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -680,13 +680,12 @@
}
int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
- struct kvm_sregs *sregs)
+ struct kvm_sregs *sregs)
{
int i;
- sregs->pvr = vcpu->arch.pvr;
-
memset(sregs, 0, sizeof(struct kvm_sregs));
+ sregs->pvr = vcpu->arch.pvr;
for (i = 0; i < vcpu->arch.slb_max; i++) {
sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige;
sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
@@ -696,7 +695,7 @@
}
int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
- struct kvm_sregs *sregs)
+ struct kvm_sregs *sregs)
{
int i, j;
@@ -1511,10 +1510,10 @@
static int kvm_rma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
- struct kvmppc_linear_info *ri = vma->vm_file->private_data;
struct page *page;
+ struct kvm_rma_info *ri = vma->vm_file->private_data;
- if (vmf->pgoff >= ri->npages)
+ if (vmf->pgoff >= kvm_rma_pages)
return VM_FAULT_SIGBUS;
page = pfn_to_page(ri->base_pfn + vmf->pgoff);
@@ -1536,7 +1535,7 @@
static int kvm_rma_release(struct inode *inode, struct file *filp)
{
- struct kvmppc_linear_info *ri = filp->private_data;
+ struct kvm_rma_info *ri = filp->private_data;
kvm_release_rma(ri);
return 0;
@@ -1549,8 +1548,17 @@
long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, struct kvm_allocate_rma *ret)
{
- struct kvmppc_linear_info *ri;
long fd;
+ struct kvm_rma_info *ri;
+ /*
+ * Only do this on PPC970 in HV mode
+ */
+ if (!cpu_has_feature(CPU_FTR_HVMODE) ||
+ !cpu_has_feature(CPU_FTR_ARCH_201))
+ return -EINVAL;
+
+ if (!kvm_rma_pages)
+ return -EINVAL;
ri = kvm_alloc_rma();
if (!ri)
@@ -1560,7 +1568,7 @@
if (fd < 0)
kvm_release_rma(ri);
- ret->rma_size = ri->npages << PAGE_SHIFT;
+ ret->rma_size = kvm_rma_pages << PAGE_SHIFT;
return fd;
}
@@ -1725,7 +1733,7 @@
{
int err = 0;
struct kvm *kvm = vcpu->kvm;
- struct kvmppc_linear_info *ri = NULL;
+ struct kvm_rma_info *ri = NULL;
unsigned long hva;
struct kvm_memory_slot *memslot;
struct vm_area_struct *vma;
@@ -1803,13 +1811,13 @@
} else {
/* Set up to use an RMO region */
- rma_size = ri->npages;
+ rma_size = kvm_rma_pages;
if (rma_size > memslot->npages)
rma_size = memslot->npages;
rma_size <<= PAGE_SHIFT;
rmls = lpcr_rmls(rma_size);
err = -EINVAL;
- if (rmls < 0) {
+ if ((long)rmls < 0) {
pr_err("KVM: Can't use RMA of 0x%lx bytes\n", rma_size);
goto out_srcu;
}
@@ -1831,14 +1839,14 @@
/* POWER7 */
lpcr &= ~(LPCR_VPM0 | LPCR_VRMA_L);
lpcr |= rmls << LPCR_RMLS_SH;
- kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT;
+ kvm->arch.rmor = ri->base_pfn << PAGE_SHIFT;
}
kvm->arch.lpcr = lpcr;
pr_info("KVM: Using RMO at %lx size %lx (LPCR = %lx)\n",
ri->base_pfn << PAGE_SHIFT, rma_size, lpcr);
/* Initialize phys addrs of pages in RMO */
- npages = ri->npages;
+ npages = kvm_rma_pages;
porder = __ilog2(npages);
physp = memslot->arch.slot_phys;
if (physp) {
@@ -1874,7 +1882,7 @@
/* Allocate the guest's logical partition ID */
lpid = kvmppc_alloc_lpid();
- if (lpid < 0)
+ if ((long)lpid < 0)
return -ENOMEM;
kvm->arch.lpid = lpid;
diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c b/arch/powerpc/kvm/book3s_hv_builtin.c
index ec0a9e5..8cd0dae 100644
--- a/arch/powerpc/kvm/book3s_hv_builtin.c
+++ b/arch/powerpc/kvm/book3s_hv_builtin.c
@@ -13,33 +13,34 @@
#include <linux/spinlock.h>
#include <linux/bootmem.h>
#include <linux/init.h>
+#include <linux/memblock.h>
+#include <linux/sizes.h>
#include <asm/cputable.h>
#include <asm/kvm_ppc.h>
#include <asm/kvm_book3s.h>
-#define KVM_LINEAR_RMA 0
-#define KVM_LINEAR_HPT 1
-
-static void __init kvm_linear_init_one(ulong size, int count, int type);
-static struct kvmppc_linear_info *kvm_alloc_linear(int type);
-static void kvm_release_linear(struct kvmppc_linear_info *ri);
-
-int kvm_hpt_order = KVM_DEFAULT_HPT_ORDER;
-EXPORT_SYMBOL_GPL(kvm_hpt_order);
-
-/*************** RMA *************/
-
+#include "book3s_hv_cma.h"
/*
- * This maintains a list of RMAs (real mode areas) for KVM guests to use.
+ * Hash page table alignment on newer cpus(CPU_FTR_ARCH_206)
+ * should be power of 2.
+ */
+#define HPT_ALIGN_PAGES ((1 << 18) >> PAGE_SHIFT) /* 256k */
+/*
+ * By default we reserve 5% of memory for hash pagetable allocation.
+ */
+static unsigned long kvm_cma_resv_ratio = 5;
+/*
+ * We allocate RMAs (real mode areas) for KVM guests from the KVM CMA area.
* Each RMA has to be physically contiguous and of a size that the
* hardware supports. PPC970 and POWER7 support 64MB, 128MB and 256MB,
* and other larger sizes. Since we are unlikely to be allocate that
* much physically contiguous memory after the system is up and running,
- * we preallocate a set of RMAs in early boot for KVM to use.
+ * we preallocate a set of RMAs in early boot using CMA.
+ * should be power of 2.
*/
-static unsigned long kvm_rma_size = 64 << 20; /* 64MB */
-static unsigned long kvm_rma_count;
+unsigned long kvm_rma_pages = (1 << 27) >> PAGE_SHIFT; /* 128MB */
+EXPORT_SYMBOL_GPL(kvm_rma_pages);
/* Work out RMLS (real mode limit selector) field value for a given RMA size.
Assumes POWER7 or PPC970. */
@@ -69,165 +70,114 @@
static int __init early_parse_rma_size(char *p)
{
+ unsigned long kvm_rma_size;
+
+ pr_debug("%s(%s)\n", __func__, p);
if (!p)
- return 1;
-
+ return -EINVAL;
kvm_rma_size = memparse(p, &p);
-
+ /*
+ * Check that the requested size is one supported in hardware
+ */
+ if (lpcr_rmls(kvm_rma_size) < 0) {
+ pr_err("RMA size of 0x%lx not supported\n", kvm_rma_size);
+ return -EINVAL;
+ }
+ kvm_rma_pages = kvm_rma_size >> PAGE_SHIFT;
return 0;
}
early_param("kvm_rma_size", early_parse_rma_size);
-static int __init early_parse_rma_count(char *p)
+struct kvm_rma_info *kvm_alloc_rma()
{
- if (!p)
- return 1;
+ struct page *page;
+ struct kvm_rma_info *ri;
- kvm_rma_count = simple_strtoul(p, NULL, 0);
-
- return 0;
-}
-early_param("kvm_rma_count", early_parse_rma_count);
-
-struct kvmppc_linear_info *kvm_alloc_rma(void)
-{
- return kvm_alloc_linear(KVM_LINEAR_RMA);
+ ri = kmalloc(sizeof(struct kvm_rma_info), GFP_KERNEL);
+ if (!ri)
+ return NULL;
+ page = kvm_alloc_cma(kvm_rma_pages, kvm_rma_pages);
+ if (!page)
+ goto err_out;
+ atomic_set(&ri->use_count, 1);
+ ri->base_pfn = page_to_pfn(page);
+ return ri;
+err_out:
+ kfree(ri);
+ return NULL;
}
EXPORT_SYMBOL_GPL(kvm_alloc_rma);
-void kvm_release_rma(struct kvmppc_linear_info *ri)
+void kvm_release_rma(struct kvm_rma_info *ri)
{
- kvm_release_linear(ri);
+ if (atomic_dec_and_test(&ri->use_count)) {
+ kvm_release_cma(pfn_to_page(ri->base_pfn), kvm_rma_pages);
+ kfree(ri);
+ }
}
EXPORT_SYMBOL_GPL(kvm_release_rma);
-/*************** HPT *************/
-
-/*
- * This maintains a list of big linear HPT tables that contain the GVA->HPA
- * memory mappings. If we don't reserve those early on, we might not be able
- * to get a big (usually 16MB) linear memory region from the kernel anymore.
- */
-
-static unsigned long kvm_hpt_count;
-
-static int __init early_parse_hpt_count(char *p)
+static int __init early_parse_kvm_cma_resv(char *p)
{
+ pr_debug("%s(%s)\n", __func__, p);
if (!p)
- return 1;
-
- kvm_hpt_count = simple_strtoul(p, NULL, 0);
-
- return 0;
+ return -EINVAL;
+ return kstrtoul(p, 0, &kvm_cma_resv_ratio);
}
-early_param("kvm_hpt_count", early_parse_hpt_count);
+early_param("kvm_cma_resv_ratio", early_parse_kvm_cma_resv);
-struct kvmppc_linear_info *kvm_alloc_hpt(void)
+struct page *kvm_alloc_hpt(unsigned long nr_pages)
{
- return kvm_alloc_linear(KVM_LINEAR_HPT);
+ unsigned long align_pages = HPT_ALIGN_PAGES;
+
+ /* Old CPUs require HPT aligned on a multiple of its size */
+ if (!cpu_has_feature(CPU_FTR_ARCH_206))
+ align_pages = nr_pages;
+ return kvm_alloc_cma(nr_pages, align_pages);
}
EXPORT_SYMBOL_GPL(kvm_alloc_hpt);
-void kvm_release_hpt(struct kvmppc_linear_info *li)
+void kvm_release_hpt(struct page *page, unsigned long nr_pages)
{
- kvm_release_linear(li);
+ kvm_release_cma(page, nr_pages);
}
EXPORT_SYMBOL_GPL(kvm_release_hpt);
-/*************** generic *************/
-
-static LIST_HEAD(free_linears);
-static DEFINE_SPINLOCK(linear_lock);
-
-static void __init kvm_linear_init_one(ulong size, int count, int type)
-{
- unsigned long i;
- unsigned long j, npages;
- void *linear;
- struct page *pg;
- const char *typestr;
- struct kvmppc_linear_info *linear_info;
-
- if (!count)
- return;
-
- typestr = (type == KVM_LINEAR_RMA) ? "RMA" : "HPT";
-
- npages = size >> PAGE_SHIFT;
- linear_info = alloc_bootmem(count * sizeof(struct kvmppc_linear_info));
- for (i = 0; i < count; ++i) {
- linear = alloc_bootmem_align(size, size);
- pr_debug("Allocated KVM %s at %p (%ld MB)\n", typestr, linear,
- size >> 20);
- linear_info[i].base_virt = linear;
- linear_info[i].base_pfn = __pa(linear) >> PAGE_SHIFT;
- linear_info[i].npages = npages;
- linear_info[i].type = type;
- list_add_tail(&linear_info[i].list, &free_linears);
- atomic_set(&linear_info[i].use_count, 0);
-
- pg = pfn_to_page(linear_info[i].base_pfn);
- for (j = 0; j < npages; ++j) {
- atomic_inc(&pg->_count);
- ++pg;
- }
- }
-}
-
-static struct kvmppc_linear_info *kvm_alloc_linear(int type)
-{
- struct kvmppc_linear_info *ri, *ret;
-
- ret = NULL;
- spin_lock(&linear_lock);
- list_for_each_entry(ri, &free_linears, list) {
- if (ri->type != type)
- continue;
-
- list_del(&ri->list);
- atomic_inc(&ri->use_count);
- memset(ri->base_virt, 0, ri->npages << PAGE_SHIFT);
- ret = ri;
- break;
- }
- spin_unlock(&linear_lock);
- return ret;
-}
-
-static void kvm_release_linear(struct kvmppc_linear_info *ri)
-{
- if (atomic_dec_and_test(&ri->use_count)) {
- spin_lock(&linear_lock);
- list_add_tail(&ri->list, &free_linears);
- spin_unlock(&linear_lock);
-
- }
-}
-
-/*
- * Called at boot time while the bootmem allocator is active,
- * to allocate contiguous physical memory for the hash page
- * tables for guests.
+/**
+ * kvm_cma_reserve() - reserve area for kvm hash pagetable
+ *
+ * This function reserves memory from early allocator. It should be
+ * called by arch specific code once the early allocator (memblock or bootmem)
+ * has been activated and all other subsystems have already allocated/reserved
+ * memory.
*/
-void __init kvm_linear_init(void)
+void __init kvm_cma_reserve(void)
{
- /* HPT */
- kvm_linear_init_one(1 << kvm_hpt_order, kvm_hpt_count, KVM_LINEAR_HPT);
+ unsigned long align_size;
+ struct memblock_region *reg;
+ phys_addr_t selected_size = 0;
+ /*
+ * We cannot use memblock_phys_mem_size() here, because
+ * memblock_analyze() has not been called yet.
+ */
+ for_each_memblock(memory, reg)
+ selected_size += memblock_region_memory_end_pfn(reg) -
+ memblock_region_memory_base_pfn(reg);
- /* RMA */
- /* Only do this on PPC970 in HV mode */
- if (!cpu_has_feature(CPU_FTR_HVMODE) ||
- !cpu_has_feature(CPU_FTR_ARCH_201))
- return;
+ selected_size = (selected_size * kvm_cma_resv_ratio / 100) << PAGE_SHIFT;
+ if (selected_size) {
+ pr_debug("%s: reserving %ld MiB for global area\n", __func__,
+ (unsigned long)selected_size / SZ_1M);
+ /*
+ * Old CPUs require HPT aligned on a multiple of its size. So for them
+ * make the alignment as max size we could request.
+ */
+ if (!cpu_has_feature(CPU_FTR_ARCH_206))
+ align_size = __rounddown_pow_of_two(selected_size);
+ else
+ align_size = HPT_ALIGN_PAGES << PAGE_SHIFT;
- if (!kvm_rma_size || !kvm_rma_count)
- return;
-
- /* Check that the requested size is one supported in hardware */
- if (lpcr_rmls(kvm_rma_size) < 0) {
- pr_err("RMA size of 0x%lx not supported\n", kvm_rma_size);
- return;
+ align_size = max(kvm_rma_pages << PAGE_SHIFT, align_size);
+ kvm_cma_declare_contiguous(selected_size, align_size);
}
-
- kvm_linear_init_one(kvm_rma_size, kvm_rma_count, KVM_LINEAR_RMA);
}
diff --git a/arch/powerpc/kvm/book3s_hv_cma.c b/arch/powerpc/kvm/book3s_hv_cma.c
new file mode 100644
index 0000000..d9d3d85
--- /dev/null
+++ b/arch/powerpc/kvm/book3s_hv_cma.c
@@ -0,0 +1,240 @@
+/*
+ * Contiguous Memory Allocator for ppc KVM hash pagetable based on CMA
+ * for DMA mapping framework
+ *
+ * Copyright IBM Corporation, 2013
+ * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License or (at your optional) any later version of the license.
+ *
+ */
+#define pr_fmt(fmt) "kvm_cma: " fmt
+
+#ifdef CONFIG_CMA_DEBUG
+#ifndef DEBUG
+# define DEBUG
+#endif
+#endif
+
+#include <linux/memblock.h>
+#include <linux/mutex.h>
+#include <linux/sizes.h>
+#include <linux/slab.h>
+
+#include "book3s_hv_cma.h"
+
+struct kvm_cma {
+ unsigned long base_pfn;
+ unsigned long count;
+ unsigned long *bitmap;
+};
+
+static DEFINE_MUTEX(kvm_cma_mutex);
+static struct kvm_cma kvm_cma_area;
+
+/**
+ * kvm_cma_declare_contiguous() - reserve area for contiguous memory handling
+ * for kvm hash pagetable
+ * @size: Size of the reserved memory.
+ * @alignment: Alignment for the contiguous memory area
+ *
+ * This function reserves memory for kvm cma area. It should be
+ * called by arch code when early allocator (memblock or bootmem)
+ * is still activate.
+ */
+long __init kvm_cma_declare_contiguous(phys_addr_t size, phys_addr_t alignment)
+{
+ long base_pfn;
+ phys_addr_t addr;
+ struct kvm_cma *cma = &kvm_cma_area;
+
+ pr_debug("%s(size %lx)\n", __func__, (unsigned long)size);
+
+ if (!size)
+ return -EINVAL;
+ /*
+ * Sanitise input arguments.
+ * We should be pageblock aligned for CMA.
+ */
+ alignment = max(alignment, (phys_addr_t)(PAGE_SIZE << pageblock_order));
+ size = ALIGN(size, alignment);
+ /*
+ * Reserve memory
+ * Use __memblock_alloc_base() since
+ * memblock_alloc_base() panic()s.
+ */
+ addr = __memblock_alloc_base(size, alignment, 0);
+ if (!addr) {
+ base_pfn = -ENOMEM;
+ goto err;
+ } else
+ base_pfn = PFN_DOWN(addr);
+
+ /*
+ * Each reserved area must be initialised later, when more kernel
+ * subsystems (like slab allocator) are available.
+ */
+ cma->base_pfn = base_pfn;
+ cma->count = size >> PAGE_SHIFT;
+ pr_info("CMA: reserved %ld MiB\n", (unsigned long)size / SZ_1M);
+ return 0;
+err:
+ pr_err("CMA: failed to reserve %ld MiB\n", (unsigned long)size / SZ_1M);
+ return base_pfn;
+}
+
+/**
+ * kvm_alloc_cma() - allocate pages from contiguous area
+ * @nr_pages: Requested number of pages.
+ * @align_pages: Requested alignment in number of pages
+ *
+ * This function allocates memory buffer for hash pagetable.
+ */
+struct page *kvm_alloc_cma(unsigned long nr_pages, unsigned long align_pages)
+{
+ int ret;
+ struct page *page = NULL;
+ struct kvm_cma *cma = &kvm_cma_area;
+ unsigned long chunk_count, nr_chunk;
+ unsigned long mask, pfn, pageno, start = 0;
+
+
+ if (!cma || !cma->count)
+ return NULL;
+
+ pr_debug("%s(cma %p, count %lu, align pages %lu)\n", __func__,
+ (void *)cma, nr_pages, align_pages);
+
+ if (!nr_pages)
+ return NULL;
+ /*
+ * align mask with chunk size. The bit tracks pages in chunk size
+ */
+ VM_BUG_ON(!is_power_of_2(align_pages));
+ mask = (align_pages >> (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT)) - 1;
+ BUILD_BUG_ON(PAGE_SHIFT > KVM_CMA_CHUNK_ORDER);
+
+ chunk_count = cma->count >> (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT);
+ nr_chunk = nr_pages >> (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT);
+
+ mutex_lock(&kvm_cma_mutex);
+ for (;;) {
+ pageno = bitmap_find_next_zero_area(cma->bitmap, chunk_count,
+ start, nr_chunk, mask);
+ if (pageno >= chunk_count)
+ break;
+
+ pfn = cma->base_pfn + (pageno << (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT));
+ ret = alloc_contig_range(pfn, pfn + nr_pages, MIGRATE_CMA);
+ if (ret == 0) {
+ bitmap_set(cma->bitmap, pageno, nr_chunk);
+ page = pfn_to_page(pfn);
+ memset(pfn_to_kaddr(pfn), 0, nr_pages << PAGE_SHIFT);
+ break;
+ } else if (ret != -EBUSY) {
+ break;
+ }
+ pr_debug("%s(): memory range at %p is busy, retrying\n",
+ __func__, pfn_to_page(pfn));
+ /* try again with a bit different memory target */
+ start = pageno + mask + 1;
+ }
+ mutex_unlock(&kvm_cma_mutex);
+ pr_debug("%s(): returned %p\n", __func__, page);
+ return page;
+}
+
+/**
+ * kvm_release_cma() - release allocated pages for hash pagetable
+ * @pages: Allocated pages.
+ * @nr_pages: Number of allocated pages.
+ *
+ * This function releases memory allocated by kvm_alloc_cma().
+ * It returns false when provided pages do not belong to contiguous area and
+ * true otherwise.
+ */
+bool kvm_release_cma(struct page *pages, unsigned long nr_pages)
+{
+ unsigned long pfn;
+ unsigned long nr_chunk;
+ struct kvm_cma *cma = &kvm_cma_area;
+
+ if (!cma || !pages)
+ return false;
+
+ pr_debug("%s(page %p count %lu)\n", __func__, (void *)pages, nr_pages);
+
+ pfn = page_to_pfn(pages);
+
+ if (pfn < cma->base_pfn || pfn >= cma->base_pfn + cma->count)
+ return false;
+
+ VM_BUG_ON(pfn + nr_pages > cma->base_pfn + cma->count);
+ nr_chunk = nr_pages >> (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT);
+
+ mutex_lock(&kvm_cma_mutex);
+ bitmap_clear(cma->bitmap,
+ (pfn - cma->base_pfn) >> (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT),
+ nr_chunk);
+ free_contig_range(pfn, nr_pages);
+ mutex_unlock(&kvm_cma_mutex);
+
+ return true;
+}
+
+static int __init kvm_cma_activate_area(unsigned long base_pfn,
+ unsigned long count)
+{
+ unsigned long pfn = base_pfn;
+ unsigned i = count >> pageblock_order;
+ struct zone *zone;
+
+ WARN_ON_ONCE(!pfn_valid(pfn));
+ zone = page_zone(pfn_to_page(pfn));
+ do {
+ unsigned j;
+ base_pfn = pfn;
+ for (j = pageblock_nr_pages; j; --j, pfn++) {
+ WARN_ON_ONCE(!pfn_valid(pfn));
+ /*
+ * alloc_contig_range requires the pfn range
+ * specified to be in the same zone. Make this
+ * simple by forcing the entire CMA resv range
+ * to be in the same zone.
+ */
+ if (page_zone(pfn_to_page(pfn)) != zone)
+ return -EINVAL;
+ }
+ init_cma_reserved_pageblock(pfn_to_page(base_pfn));
+ } while (--i);
+ return 0;
+}
+
+static int __init kvm_cma_init_reserved_areas(void)
+{
+ int bitmap_size, ret;
+ unsigned long chunk_count;
+ struct kvm_cma *cma = &kvm_cma_area;
+
+ pr_debug("%s()\n", __func__);
+ if (!cma->count)
+ return 0;
+ chunk_count = cma->count >> (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT);
+ bitmap_size = BITS_TO_LONGS(chunk_count) * sizeof(long);
+ cma->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
+ if (!cma->bitmap)
+ return -ENOMEM;
+
+ ret = kvm_cma_activate_area(cma->base_pfn, cma->count);
+ if (ret)
+ goto error;
+ return 0;
+
+error:
+ kfree(cma->bitmap);
+ return ret;
+}
+core_initcall(kvm_cma_init_reserved_areas);
diff --git a/arch/powerpc/kvm/book3s_hv_cma.h b/arch/powerpc/kvm/book3s_hv_cma.h
new file mode 100644
index 0000000..655144f
--- /dev/null
+++ b/arch/powerpc/kvm/book3s_hv_cma.h
@@ -0,0 +1,27 @@
+/*
+ * Contiguous Memory Allocator for ppc KVM hash pagetable based on CMA
+ * for DMA mapping framework
+ *
+ * Copyright IBM Corporation, 2013
+ * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License or (at your optional) any later version of the license.
+ *
+ */
+
+#ifndef __POWERPC_KVM_CMA_ALLOC_H__
+#define __POWERPC_KVM_CMA_ALLOC_H__
+/*
+ * Both RMA and Hash page allocation will be multiple of 256K.
+ */
+#define KVM_CMA_CHUNK_ORDER 18
+
+extern struct page *kvm_alloc_cma(unsigned long nr_pages,
+ unsigned long align_pages);
+extern bool kvm_release_cma(struct page *pages, unsigned long nr_pages);
+extern long kvm_cma_declare_contiguous(phys_addr_t size,
+ phys_addr_t alignment) __init;
+#endif
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index fc25689..45e30d6 100644
--- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
+++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
@@ -383,6 +383,80 @@
return old == 0;
}
+/*
+ * tlbie/tlbiel is a bit different on the PPC970 compared to later
+ * processors such as POWER7; the large page bit is in the instruction
+ * not RB, and the top 16 bits and the bottom 12 bits of the VA
+ * in RB must be 0.
+ */
+static void do_tlbies_970(struct kvm *kvm, unsigned long *rbvalues,
+ long npages, int global, bool need_sync)
+{
+ long i;
+
+ if (global) {
+ while (!try_lock_tlbie(&kvm->arch.tlbie_lock))
+ cpu_relax();
+ if (need_sync)
+ asm volatile("ptesync" : : : "memory");
+ for (i = 0; i < npages; ++i) {
+ unsigned long rb = rbvalues[i];
+
+ if (rb & 1) /* large page */
+ asm volatile("tlbie %0,1" : :
+ "r" (rb & 0x0000fffffffff000ul));
+ else
+ asm volatile("tlbie %0,0" : :
+ "r" (rb & 0x0000fffffffff000ul));
+ }
+ asm volatile("eieio; tlbsync; ptesync" : : : "memory");
+ kvm->arch.tlbie_lock = 0;
+ } else {
+ if (need_sync)
+ asm volatile("ptesync" : : : "memory");
+ for (i = 0; i < npages; ++i) {
+ unsigned long rb = rbvalues[i];
+
+ if (rb & 1) /* large page */
+ asm volatile("tlbiel %0,1" : :
+ "r" (rb & 0x0000fffffffff000ul));
+ else
+ asm volatile("tlbiel %0,0" : :
+ "r" (rb & 0x0000fffffffff000ul));
+ }
+ asm volatile("ptesync" : : : "memory");
+ }
+}
+
+static void do_tlbies(struct kvm *kvm, unsigned long *rbvalues,
+ long npages, int global, bool need_sync)
+{
+ long i;
+
+ if (cpu_has_feature(CPU_FTR_ARCH_201)) {
+ /* PPC970 tlbie instruction is a bit different */
+ do_tlbies_970(kvm, rbvalues, npages, global, need_sync);
+ return;
+ }
+ if (global) {
+ while (!try_lock_tlbie(&kvm->arch.tlbie_lock))
+ cpu_relax();
+ if (need_sync)
+ asm volatile("ptesync" : : : "memory");
+ for (i = 0; i < npages; ++i)
+ asm volatile(PPC_TLBIE(%1,%0) : :
+ "r" (rbvalues[i]), "r" (kvm->arch.lpid));
+ asm volatile("eieio; tlbsync; ptesync" : : : "memory");
+ kvm->arch.tlbie_lock = 0;
+ } else {
+ if (need_sync)
+ asm volatile("ptesync" : : : "memory");
+ for (i = 0; i < npages; ++i)
+ asm volatile("tlbiel %0" : : "r" (rbvalues[i]));
+ asm volatile("ptesync" : : : "memory");
+ }
+}
+
long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags,
unsigned long pte_index, unsigned long avpn,
unsigned long *hpret)
@@ -408,19 +482,7 @@
if (v & HPTE_V_VALID) {
hpte[0] &= ~HPTE_V_VALID;
rb = compute_tlbie_rb(v, hpte[1], pte_index);
- if (global_invalidates(kvm, flags)) {
- while (!try_lock_tlbie(&kvm->arch.tlbie_lock))
- cpu_relax();
- asm volatile("ptesync" : : : "memory");
- asm volatile(PPC_TLBIE(%1,%0)"; eieio; tlbsync"
- : : "r" (rb), "r" (kvm->arch.lpid));
- asm volatile("ptesync" : : : "memory");
- kvm->arch.tlbie_lock = 0;
- } else {
- asm volatile("ptesync" : : : "memory");
- asm volatile("tlbiel %0" : : "r" (rb));
- asm volatile("ptesync" : : : "memory");
- }
+ do_tlbies(kvm, &rb, 1, global_invalidates(kvm, flags), true);
/* Read PTE low word after tlbie to get final R/C values */
remove_revmap_chain(kvm, pte_index, rev, v, hpte[1]);
}
@@ -448,12 +510,11 @@
unsigned long *hp, *hptes[4], tlbrb[4];
long int i, j, k, n, found, indexes[4];
unsigned long flags, req, pte_index, rcbits;
- long int local = 0;
+ int global;
long int ret = H_SUCCESS;
struct revmap_entry *rev, *revs[4];
- if (atomic_read(&kvm->online_vcpus) == 1)
- local = 1;
+ global = global_invalidates(kvm, 0);
for (i = 0; i < 4 && ret == H_SUCCESS; ) {
n = 0;
for (; i < 4; ++i) {
@@ -529,22 +590,7 @@
break;
/* Now that we've collected a batch, do the tlbies */
- if (!local) {
- while(!try_lock_tlbie(&kvm->arch.tlbie_lock))
- cpu_relax();
- asm volatile("ptesync" : : : "memory");
- for (k = 0; k < n; ++k)
- asm volatile(PPC_TLBIE(%1,%0) : :
- "r" (tlbrb[k]),
- "r" (kvm->arch.lpid));
- asm volatile("eieio; tlbsync; ptesync" : : : "memory");
- kvm->arch.tlbie_lock = 0;
- } else {
- asm volatile("ptesync" : : : "memory");
- for (k = 0; k < n; ++k)
- asm volatile("tlbiel %0" : : "r" (tlbrb[k]));
- asm volatile("ptesync" : : : "memory");
- }
+ do_tlbies(kvm, tlbrb, n, global, true);
/* Read PTE low words after tlbie to get final R/C values */
for (k = 0; k < n; ++k) {
@@ -603,19 +649,7 @@
if (v & HPTE_V_VALID) {
rb = compute_tlbie_rb(v, r, pte_index);
hpte[0] = v & ~HPTE_V_VALID;
- if (global_invalidates(kvm, flags)) {
- while(!try_lock_tlbie(&kvm->arch.tlbie_lock))
- cpu_relax();
- asm volatile("ptesync" : : : "memory");
- asm volatile(PPC_TLBIE(%1,%0)"; eieio; tlbsync"
- : : "r" (rb), "r" (kvm->arch.lpid));
- asm volatile("ptesync" : : : "memory");
- kvm->arch.tlbie_lock = 0;
- } else {
- asm volatile("ptesync" : : : "memory");
- asm volatile("tlbiel %0" : : "r" (rb));
- asm volatile("ptesync" : : : "memory");
- }
+ do_tlbies(kvm, &rb, 1, global_invalidates(kvm, flags), true);
/*
* If the host has this page as readonly but the guest
* wants to make it read/write, reduce the permissions.
@@ -686,13 +720,7 @@
hptep[0] &= ~HPTE_V_VALID;
rb = compute_tlbie_rb(hptep[0], hptep[1], pte_index);
- while (!try_lock_tlbie(&kvm->arch.tlbie_lock))
- cpu_relax();
- asm volatile("ptesync" : : : "memory");
- asm volatile(PPC_TLBIE(%1,%0)"; eieio; tlbsync"
- : : "r" (rb), "r" (kvm->arch.lpid));
- asm volatile("ptesync" : : : "memory");
- kvm->arch.tlbie_lock = 0;
+ do_tlbies(kvm, &rb, 1, 1, true);
}
EXPORT_SYMBOL_GPL(kvmppc_invalidate_hpte);
@@ -706,12 +734,7 @@
rbyte = (hptep[1] & ~HPTE_R_R) >> 8;
/* modify only the second-last byte, which contains the ref bit */
*((char *)hptep + 14) = rbyte;
- while (!try_lock_tlbie(&kvm->arch.tlbie_lock))
- cpu_relax();
- asm volatile(PPC_TLBIE(%1,%0)"; eieio; tlbsync"
- : : "r" (rb), "r" (kvm->arch.lpid));
- asm volatile("ptesync" : : : "memory");
- kvm->arch.tlbie_lock = 0;
+ do_tlbies(kvm, &rb, 1, 1, false);
}
EXPORT_SYMBOL_GPL(kvmppc_clear_ref_hpte);
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index b02f91e..60dce5b 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -1381,7 +1381,7 @@
cmpldi r3,hcall_real_table_end - hcall_real_table
bge guest_exit_cont
LOAD_REG_ADDR(r4, hcall_real_table)
- lwzx r3,r3,r4
+ lwax r3,r3,r4
cmpwi r3,0
beq guest_exit_cont
add r3,r3,r4
diff --git a/arch/powerpc/kvm/book3s_interrupts.S b/arch/powerpc/kvm/book3s_interrupts.S
index 48cbbf8..17cfae5 100644
--- a/arch/powerpc/kvm/book3s_interrupts.S
+++ b/arch/powerpc/kvm/book3s_interrupts.S
@@ -92,6 +92,11 @@
PPC_LL r3, VCPU_HFLAGS(r4)
rldicl r3, r3, 0, 63 /* r3 &= 1 */
stb r3, HSTATE_RESTORE_HID5(r13)
+
+ /* Load up guest SPRG3 value, since it's user readable */
+ ld r3, VCPU_SHARED(r4)
+ ld r3, VCPU_SHARED_SPRG3(r3)
+ mtspr SPRN_SPRG3, r3
#endif /* CONFIG_PPC_BOOK3S_64 */
PPC_LL r4, VCPU_SHADOW_MSR(r4) /* get shadow_msr */
@@ -123,6 +128,15 @@
/* R7 = vcpu */
PPC_LL r7, GPR4(r1)
+#ifdef CONFIG_PPC_BOOK3S_64
+ /*
+ * Reload kernel SPRG3 value.
+ * No need to save guest value as usermode can't modify SPRG3.
+ */
+ ld r3, PACA_SPRG3(r13)
+ mtspr SPRN_SPRG3, r3
+#endif /* CONFIG_PPC_BOOK3S_64 */
+
PPC_STL r14, VCPU_GPR(R14)(r7)
PPC_STL r15, VCPU_GPR(R15)(r7)
PPC_STL r16, VCPU_GPR(R16)(r7)
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 19498a5..27db1e6 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -468,7 +468,8 @@
* both the traditional FP registers and the added VSX
* registers into thread.fpr[].
*/
- giveup_fpu(current);
+ if (current->thread.regs->msr & MSR_FP)
+ giveup_fpu(current);
for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
vcpu_fpr[i] = thread_fpr[get_fpr_index(i)];
@@ -483,7 +484,8 @@
#ifdef CONFIG_ALTIVEC
if (msr & MSR_VEC) {
- giveup_altivec(current);
+ if (current->thread.regs->msr & MSR_VEC)
+ giveup_altivec(current);
memcpy(vcpu->arch.vr, t->vr, sizeof(vcpu->arch.vr));
vcpu->arch.vscr = t->vscr;
}
@@ -575,8 +577,6 @@
printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
#endif
- current->thread.regs->msr |= msr;
-
if (msr & MSR_FP) {
for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
thread_fpr[get_fpr_index(i)] = vcpu_fpr[i];
@@ -598,12 +598,32 @@
#endif
}
+ current->thread.regs->msr |= msr;
vcpu->arch.guest_owned_ext |= msr;
kvmppc_recalc_shadow_msr(vcpu);
return RESUME_GUEST;
}
+/*
+ * Kernel code using FP or VMX could have flushed guest state to
+ * the thread_struct; if so, get it back now.
+ */
+static void kvmppc_handle_lost_ext(struct kvm_vcpu *vcpu)
+{
+ unsigned long lost_ext;
+
+ lost_ext = vcpu->arch.guest_owned_ext & ~current->thread.regs->msr;
+ if (!lost_ext)
+ return;
+
+ if (lost_ext & MSR_FP)
+ kvmppc_load_up_fpu();
+ if (lost_ext & MSR_VEC)
+ kvmppc_load_up_altivec();
+ current->thread.regs->msr |= lost_ext;
+}
+
int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned int exit_nr)
{
@@ -772,7 +792,7 @@
}
case BOOK3S_INTERRUPT_SYSCALL:
if (vcpu->arch.papr_enabled &&
- (kvmppc_get_last_inst(vcpu) == 0x44000022) &&
+ (kvmppc_get_last_sc(vcpu) == 0x44000022) &&
!(vcpu->arch.shared->msr & MSR_PR)) {
/* SC 1 papr hypercalls */
ulong cmd = kvmppc_get_gpr(vcpu, 3);
@@ -890,8 +910,9 @@
local_irq_enable();
r = s;
} else {
- kvmppc_lazy_ee_enable();
+ kvmppc_fix_ee_before_entry();
}
+ kvmppc_handle_lost_ext(vcpu);
}
trace_kvm_book3s_reenter(r, vcpu);
@@ -1047,11 +1068,12 @@
if (err)
goto free_shadow_vcpu;
+ err = -ENOMEM;
p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
- /* the real shared page fills the last 4k of our page */
- vcpu->arch.shared = (void*)(p + PAGE_SIZE - 4096);
if (!p)
goto uninit_vcpu;
+ /* the real shared page fills the last 4k of our page */
+ vcpu->arch.shared = (void *)(p + PAGE_SIZE - 4096);
#ifdef CONFIG_PPC_BOOK3S_64
/* default to book3s_64 (970fx) */
@@ -1161,7 +1183,7 @@
if (vcpu->arch.shared->msr & MSR_FP)
kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
- kvmppc_lazy_ee_enable();
+ kvmppc_fix_ee_before_entry();
ret = __kvmppc_vcpu_run(kvm_run, vcpu);
diff --git a/arch/powerpc/kvm/book3s_xics.c b/arch/powerpc/kvm/book3s_xics.c
index 94c1dd4..a3a5cb8 100644
--- a/arch/powerpc/kvm/book3s_xics.c
+++ b/arch/powerpc/kvm/book3s_xics.c
@@ -19,6 +19,7 @@
#include <asm/hvcall.h>
#include <asm/xics.h>
#include <asm/debug.h>
+#include <asm/time.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index dcc94f0..17722d8 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -674,8 +674,6 @@
goto out;
}
- kvm_guest_enter();
-
#ifdef CONFIG_PPC_FPU
/* Save userspace FPU state in stack */
enable_kernel_fp();
@@ -698,7 +696,7 @@
kvmppc_load_guest_fp(vcpu);
#endif
- kvmppc_lazy_ee_enable();
+ kvmppc_fix_ee_before_entry();
ret = __kvmppc_vcpu_run(kvm_run, vcpu);
@@ -1168,7 +1166,7 @@
local_irq_enable();
r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
} else {
- kvmppc_lazy_ee_enable();
+ kvmppc_fix_ee_before_entry();
}
}
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index ae63ae4..f55e14c 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -117,8 +117,6 @@
kvm_guest_exit();
continue;
}
-
- trace_hardirqs_on();
#endif
kvm_guest_enter();
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 5daa259..e373671 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -200,11 +200,9 @@
APIs extension; the file's descriptor can then be passed on to other
driver.
-config CMA
- bool "Contiguous Memory Allocator"
- depends on HAVE_DMA_CONTIGUOUS && HAVE_MEMBLOCK
- select MIGRATION
- select MEMORY_ISOLATION
+config DMA_CMA
+ bool "DMA Contiguous Memory Allocator"
+ depends on HAVE_DMA_CONTIGUOUS && CMA
help
This enables the Contiguous Memory Allocator which allows drivers
to allocate big physically-contiguous blocks of memory for use with
@@ -213,17 +211,7 @@
For more information see <include/linux/dma-contiguous.h>.
If unsure, say "n".
-if CMA
-
-config CMA_DEBUG
- bool "CMA debug messages (DEVELOPMENT)"
- depends on DEBUG_KERNEL
- help
- Turns on debug messages in CMA. This produces KERN_DEBUG
- messages for every CMA call as well as various messages while
- processing calls such as dma_alloc_from_contiguous().
- This option does not affect warning and error messages.
-
+if DMA_CMA
comment "Default contiguous memory area size:"
config CMA_SIZE_MBYTES
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 48029aa..94e8a80 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -6,7 +6,7 @@
attribute_container.o transport_class.o \
topology.o
obj-$(CONFIG_DEVTMPFS) += devtmpfs.o
-obj-$(CONFIG_CMA) += dma-contiguous.o
+obj-$(CONFIG_DMA_CMA) += dma-contiguous.o
obj-y += power/
obj-$(CONFIG_HAS_DMA) += dma-mapping.o
obj-$(CONFIG_HAVE_GENERIC_DMA_COHERENT) += dma-coherent.o
diff --git a/include/linux/dma-contiguous.h b/include/linux/dma-contiguous.h
index 01b5c84..00141d3 100644
--- a/include/linux/dma-contiguous.h
+++ b/include/linux/dma-contiguous.h
@@ -57,7 +57,7 @@
struct page;
struct device;
-#ifdef CONFIG_CMA
+#ifdef CONFIG_DMA_CMA
/*
* There is always at least global CMA area and a few optional device
diff --git a/mm/Kconfig b/mm/Kconfig
index 8028dcc..6cdd270 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -478,6 +478,30 @@
If unsure, say Y to enable frontswap.
+config CMA
+ bool "Contiguous Memory Allocator"
+ depends on HAVE_MEMBLOCK
+ select MIGRATION
+ select MEMORY_ISOLATION
+ help
+ This enables the Contiguous Memory Allocator which allows other
+ subsystems to allocate big physically-contiguous blocks of memory.
+ CMA reserves a region of memory and allows only movable pages to
+ be allocated from it. This way, the kernel can use the memory for
+ pagecache and when a subsystem requests for contiguous area, the
+ allocated pages are migrated away to serve the contiguous request.
+
+ If unsure, say "n".
+
+config CMA_DEBUG
+ bool "CMA debug messages (DEVELOPMENT)"
+ depends on DEBUG_KERNEL && CMA
+ help
+ Turns on debug messages in CMA. This produces KERN_DEBUG
+ messages for every CMA call as well as various messages while
+ processing calls such as dma_alloc_from_contiguous().
+ This option does not affect warning and error messages.
+
config ZBUD
tristate
default n