linuxmsm/laptops-kernel
0
0
Fork 0
mirror of https://github.com/linux-msm/laptops-kernel.git synced 2026-08-13 14:19:53 -07:00
Code Issues Packages Projects Releases Wiki Activity

KVM: PPC: Add support for Book3S processors in hypervisor mode

Browse Source 
This adds support for KVM running on 64-bit Book 3S processors,
specifically POWER7, in hypervisor mode.  Using hypervisor mode means
that the guest can use the processor's supervisor mode.  That means
that the guest can execute privileged instructions and access privileged
registers itself without trapping to the host.  This gives excellent
performance, but does mean that KVM cannot emulate a processor
architecture other than the one that the hardware implements.

This code assumes that the guest is running paravirtualized using the
PAPR (Power Architecture Platform Requirements) interface, which is the
interface that IBM's PowerVM hypervisor uses.  That means that existing
Linux distributions that run on IBM pSeries machines will also run
under KVM without modification.  In order to communicate the PAPR
hypercalls to qemu, this adds a new KVM_EXIT_PAPR_HCALL exit code
to include/linux/kvm.h.

Currently the choice between book3s_hv support and book3s_pr support
(i.e. the existing code, which runs the guest in user mode) has to be
made at kernel configuration time, so a given kernel binary can only
do one or the other.

This new book3s_hv code doesn't support MMIO emulation at present.
Since we are running paravirtualized guests, this isn't a serious
restriction.

With the guest running in supervisor mode, most exceptions go straight
to the guest.  We will never get data or instruction storage or segment
interrupts, alignment interrupts, decrementer interrupts, program
interrupts, single-step interrupts, etc., coming to the hypervisor from
the guest.  Therefore this introduces a new KVMTEST_NONHV macro for the
exception entry path so that we don't have to do the KVM test on entry
to those exception handlers.

We do however get hypervisor decrementer, hypervisor data storage,
hypervisor instruction storage, and hypervisor emulation assist
interrupts, so we have to handle those.

In hypervisor mode, real-mode accesses can access all of RAM, not just
a limited amount.  Therefore we put all the guest state in the vcpu.arch
and use the shadow_vcpu in the PACA only for temporary scratch space.
We allocate the vcpu with kzalloc rather than vzalloc, and we don't use
anything in the kvmppc_vcpu_book3s struct, so we don't allocate it.
We don't have a shared page with the guest, but we still need a
kvm_vcpu_arch_shared struct to store the values of various registers,
so we include one in the vcpu_arch struct.

The POWER7 processor has a restriction that all threads in a core have
to be in the same partition.  MMU-on kernel code counts as a partition
(partition 0), so we have to do a partition switch on every entry to and
exit from the guest.  At present we require the host and guest to run
in single-thread mode because of this hardware restriction.

This code allocates a hashed page table for the guest and initializes
it with HPTEs for the guest's Virtual Real Memory Area (VRMA).  We
require that the guest memory is allocated using 16MB huge pages, in
order to simplify the low-level memory management.  This also means that
we can get away without tracking paging activity in the host for now,
since huge pages can't be paged or swapped.

This also adds a few new exports needed by the book3s_hv code.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Paul Mackerras
2011-07-12 13:16:54 +03:00
committed by Avi Kivity
parent 3c42bf8a71
commit de56a948b9
28 changed files with 2103 additions and 81 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Documentation/virtual/kvm/api.txt
+17
View File
@@ -1532,6 +1532,23 @@ Userspace can now handle the hypercall and when it's done modify the gprs as
necessary. Upon guest entry all guest GPRs will then be replaced by the values
in this struct.
/* KVM_EXIT_PAPR_HCALL */
struct {
__u64 nr;
__u64 ret;
__u64 args[9];
} papr_hcall;
This is used on 64-bit PowerPC when emulating a pSeries partition,
e.g. with the 'pseries' machine type in qemu. It occurs when the
guest does a hypercall using the 'sc 1' instruction. The 'nr' field
contains the hypercall number (from the guest R3), and 'args' contains
the arguments (from the guest R4 - R12). Userspace should put the
return code in 'ret' and any extra returned values in args[].
The possible hypercalls are defined in the Power Architecture Platform
Requirements (PAPR) document available from www.power.org (free
developer registration required to access it).
/* Fix the size of the union. */
char padding[256];
};
arch/powerpc/include/asm/exception-64s.h
+15 -4
View File
@@ -134,6 +134,17 @@ do_kvm_##n: \
#define KVM_HANDLER_SKIP(area, h, n)
#endif
#ifdef CONFIG_KVM_BOOK3S_PR
#define KVMTEST_PR(n) __KVMTEST(n)
#define KVM_HANDLER_PR(area, h, n) __KVM_HANDLER(area, h, n)
#define KVM_HANDLER_PR_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n)
#else
#define KVMTEST_PR(n)
#define KVM_HANDLER_PR(area, h, n)
#define KVM_HANDLER_PR_SKIP(area, h, n)
#endif
#define NOTEST(n)
/*
@@ -210,7 +221,7 @@ label##_pSeries: \
HMT_MEDIUM; \
SET_SCRATCH0(r13); /* save r13 */ \
EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
EXC_STD, KVMTEST, vec)
EXC_STD, KVMTEST_PR, vec)
#define STD_EXCEPTION_HV(loc, vec, label) \
. = loc; \
@@ -227,8 +238,8 @@ label##_hv: \
beq masked_##h##interrupt
#define _SOFTEN_TEST(h) __SOFTEN_TEST(h)
#define SOFTEN_TEST(vec) \
KVMTEST(vec); \
#define SOFTEN_TEST_PR(vec) \
KVMTEST_PR(vec); \
_SOFTEN_TEST(EXC_STD)
#define SOFTEN_TEST_HV(vec) \
@@ -248,7 +259,7 @@ label##_hv: \
.globl label##_pSeries; \
label##_pSeries: \
_MASKABLE_EXCEPTION_PSERIES(vec, label, \
EXC_STD, SOFTEN_TEST)
EXC_STD, SOFTEN_TEST_PR)
#define MASKABLE_EXCEPTION_HV(loc, vec, label) \
. = loc; \
arch/powerpc/include/asm/kvm_asm.h
+4
View File
@@ -64,8 +64,12 @@
#define BOOK3S_INTERRUPT_PROGRAM 0x700
#define BOOK3S_INTERRUPT_FP_UNAVAIL 0x800
#define BOOK3S_INTERRUPT_DECREMENTER 0x900
#define BOOK3S_INTERRUPT_HV_DECREMENTER 0x980
#define BOOK3S_INTERRUPT_SYSCALL 0xc00
#define BOOK3S_INTERRUPT_TRACE 0xd00
#define BOOK3S_INTERRUPT_H_DATA_STORAGE 0xe00
#define BOOK3S_INTERRUPT_H_INST_STORAGE 0xe20
#define BOOK3S_INTERRUPT_H_EMUL_ASSIST 0xe40
#define BOOK3S_INTERRUPT_PERFMON 0xf00
#define BOOK3S_INTERRUPT_ALTIVEC 0xf20
#define BOOK3S_INTERRUPT_VSX 0xf40
arch/powerpc/include/asm/kvm_book3s.h
+119 -18
View File
@@ -116,6 +116,7 @@ extern void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 new_msr);
extern void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr);
extern void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu);
extern void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu);
extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu);
extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte);
extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
@@ -127,10 +128,12 @@ extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu);
extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
extern int kvmppc_mmu_hpte_sysinit(void);
extern void kvmppc_mmu_hpte_sysexit(void);
extern int kvmppc_mmu_hv_init(void);
extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
extern int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec);
extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags);
extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat,
bool upper, u32 val);
extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr);
@@ -140,6 +143,7 @@ extern pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
extern void kvmppc_handler_lowmem_trampoline(void);
extern void kvmppc_handler_trampoline_enter(void);
extern void kvmppc_rmcall(ulong srr0, ulong srr1);
extern void kvmppc_hv_entry_trampoline(void);
extern void kvmppc_load_up_fpu(void);
extern void kvmppc_load_up_altivec(void);
extern void kvmppc_load_up_vsx(void);
@@ -151,6 +155,19 @@ static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
return container_of(vcpu, struct kvmppc_vcpu_book3s, vcpu);
}
extern void kvm_return_point(void);
/* Also add subarch specific defines */
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
#include <asm/kvm_book3s_32.h>
#endif
#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
#include <asm/kvm_book3s_64.h>
#endif
#ifdef CONFIG_KVM_BOOK3S_PR
static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
{
return to_book3s(vcpu)->hior;
@@ -165,16 +182,6 @@ static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
vcpu->arch.shared->int_pending = 0;
}
static inline ulong dsisr(void)
{
ulong r;
asm ( "mfdsisr %0 " : "=r" (r) );
return r;
}
extern void kvm_return_point(void);
static inline struct kvmppc_book3s_shadow_vcpu *to_svcpu(struct kvm_vcpu *vcpu);
static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
{
if ( num < 14 ) {
@@ -281,6 +288,108 @@ static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
return crit;
}
#else /* CONFIG_KVM_BOOK3S_PR */
static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
{
return 0;
}
static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
unsigned long pending_now, unsigned long old_pending)
{
/* Recalculate LPCR:MER based on the presence of
* a pending external interrupt
*/
if (test_bit(BOOK3S_IRQPRIO_EXTERNAL, &pending_now) ||
test_bit(BOOK3S_IRQPRIO_EXTERNAL_LEVEL, &pending_now))
vcpu->arch.lpcr |= LPCR_MER;
else
vcpu->arch.lpcr &= ~((u64)LPCR_MER);
}
static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
{
vcpu->arch.gpr[num] = val;
}
static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
{
return vcpu->arch.gpr[num];
}
static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
{
vcpu->arch.cr = val;
}
static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
{
return vcpu->arch.cr;
}
static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
{
vcpu->arch.xer = val;
}
static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
{
return vcpu->arch.xer;
}
static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
{
vcpu->arch.ctr = val;
}
static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
{
return vcpu->arch.ctr;
}
static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
{
vcpu->arch.lr = val;
}
static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
{
return vcpu->arch.lr;
}
static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
{
vcpu->arch.pc = val;
}
static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
{
return vcpu->arch.pc;
}
static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
{
ulong pc = kvmppc_get_pc(vcpu);
/* 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;
}
static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
{
return false;
}
#endif
/* Magic register values loaded into r3 and r4 before the 'sc' assembly
* instruction for the OSI hypercalls */
@@ -289,12 +398,4 @@ static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
#define INS_DCBZ 0x7c0007ec
/* Also add subarch specific defines */
#ifdef CONFIG_PPC_BOOK3S_32
#include <asm/kvm_book3s_32.h>
#else
#include <asm/kvm_book3s_64.h>
#endif
#endif /* __ASM_KVM_BOOK3S_H__ */
arch/powerpc/include/asm/kvm_book3s_64.h
+2
View File
@@ -20,9 +20,11 @@
#ifndef __ASM_KVM_BOOK3S_64_H__
#define __ASM_KVM_BOOK3S_64_H__
#ifdef CONFIG_KVM_BOOK3S_PR
static inline struct kvmppc_book3s_shadow_vcpu *to_svcpu(struct kvm_vcpu *vcpu)
{
return &get_paca()->shadow_vcpu;
}
#endif
#endif /* __ASM_KVM_BOOK3S_64_H__ */
arch/powerpc/include/asm/kvm_book3s_asm.h
+12
View File
@@ -70,10 +70,22 @@ kvmppc_resume_\intno:
struct kvmppc_host_state {
ulong host_r1;
ulong host_r2;
ulong host_msr;
ulong vmhandler;
ulong scratch0;
ulong scratch1;
u8 in_guest;
#ifdef CONFIG_KVM_BOOK3S_64_HV
struct kvm_vcpu *kvm_vcpu;
u64 dabr;
u64 host_mmcr[3];
u32 host_pmc[6];
u64 host_purr;
u64 host_spurr;
u64 host_dscr;
u64 dec_expires;
#endif
};
struct kvmppc_book3s_shadow_vcpu {
arch/powerpc/include/asm/kvm_booke.h
+4
View File
@@ -93,4 +93,8 @@ static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
return vcpu->arch.fault_dear;
}
static inline ulong kvmppc_get_msr(struct kvm_vcpu *vcpu)
{
return vcpu->arch.shared->msr;
}
#endif /* __ASM_KVM_BOOKE_H__ */
arch/powerpc/include/asm/kvm_host.h
+48 -5
View File
@@ -33,7 +33,9 @@
/* memory slots that does not exposed to userspace */
#define KVM_PRIVATE_MEM_SLOTS 4
#ifdef CONFIG_KVM_MMIO
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
#endif
/* We don't currently support large pages. */
#define KVM_HPAGE_GFN_SHIFT(x) 0
@@ -133,7 +135,26 @@ struct kvmppc_exit_timing {
};
};
struct kvmppc_pginfo {
unsigned long pfn;
atomic_t refcnt;
};
struct kvm_arch {
#ifdef CONFIG_KVM_BOOK3S_64_HV
unsigned long hpt_virt;
unsigned long ram_npages;
unsigned long ram_psize;
unsigned long ram_porder;
struct kvmppc_pginfo *ram_pginfo;
unsigned int lpid;
unsigned int host_lpid;
unsigned long host_lpcr;
unsigned long sdr1;
unsigned long host_sdr1;
int tlbie_lock;
unsigned short last_vcpu[NR_CPUS];
#endif /* CONFIG_KVM_BOOK3S_64_HV */
};
struct kvmppc_pte {
@@ -190,7 +211,7 @@ struct kvm_vcpu_arch {
ulong rmcall;
ulong host_paca_phys;
struct kvmppc_slb slb[64];
int slb_max; /* # valid entries in slb[] */
int slb_max; /* 1 + index of last valid entry in slb[] */
int slb_nr; /* total number of entries in SLB */
struct kvmppc_mmu mmu;
#endif
@@ -212,7 +233,7 @@ struct kvm_vcpu_arch {
#endif
#ifdef CONFIG_VSX
u64 vsr[32];
u64 vsr[64];
#endif
#ifdef CONFIG_PPC_BOOK3S
@@ -220,18 +241,24 @@ struct kvm_vcpu_arch {
u32 qpr[32];
#endif
#ifdef CONFIG_BOOKE
ulong pc;
ulong ctr;
ulong lr;
ulong xer;
u32 cr;
#endif
#ifdef CONFIG_PPC_BOOK3S
ulong hflags;
ulong guest_owned_ext;
ulong purr;
ulong spurr;
ulong lpcr;
ulong dscr;
ulong amr;
ulong uamor;
u32 ctrl;
ulong dabr;
#endif
u32 vrsave; /* also USPRG0 */
u32 mmucr;
@@ -270,6 +297,9 @@ struct kvm_vcpu_arch {
u32 dbcr1;
u32 dbsr;
u64 mmcr[3];
u32 pmc[6];
#ifdef CONFIG_KVM_EXIT_TIMING
struct mutex exit_timing_lock;
struct kvmppc_exit_timing timing_exit;
@@ -284,8 +314,12 @@ struct kvm_vcpu_arch {
struct dentry *debugfs_exit_timing;
#endif
#ifdef CONFIG_PPC_BOOK3S
ulong fault_dar;
u32 fault_dsisr;
#endif
#ifdef CONFIG_BOOKE
u32 last_inst;
ulong fault_dear;
ulong fault_esr;
ulong queued_dear;
@@ -300,16 +334,25 @@ struct kvm_vcpu_arch {
u8 dcr_is_write;
u8 osi_needed;
u8 osi_enabled;
u8 hcall_needed;
u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */
struct hrtimer dec_timer;
struct tasklet_struct tasklet;
u64 dec_jiffies;
u64 dec_expires;
unsigned long pending_exceptions;
u16 last_cpu;
u32 last_inst;
int trap;
struct kvm_vcpu_arch_shared *shared;
unsigned long magic_page_pa; /* phys addr to map the magic page to */
unsigned long magic_page_ea; /* effect. addr to map the magic page to */
#ifdef CONFIG_KVM_BOOK3S_64_HV
struct kvm_vcpu_arch_shared shregs;
#endif
};
#endif /* __POWERPC_KVM_HOST_H__ */
arch/powerpc/include/asm/kvm_ppc.h
+6
View File
@@ -112,6 +112,12 @@ extern void kvmppc_core_destroy_mmu(struct kvm_vcpu *vcpu);
extern int kvmppc_kvm_pv(struct kvm_vcpu *vcpu);
extern void kvmppc_map_magic(struct kvm_vcpu *vcpu);
extern long kvmppc_alloc_hpt(struct kvm *kvm);
extern void kvmppc_free_hpt(struct kvm *kvm);
extern long kvmppc_prepare_vrma(struct kvm *kvm,
struct kvm_userspace_memory_region *mem);
extern void kvmppc_map_vrma(struct kvm *kvm,
struct kvm_userspace_memory_region *mem);
extern int kvmppc_core_init_vm(struct kvm *kvm);
extern void kvmppc_core_destroy_vm(struct kvm *kvm);
extern int kvmppc_core_prepare_memory_region(struct kvm *kvm,
arch/powerpc/include/asm/mmu-hash64.h
+8 -2
View File
@@ -90,13 +90,19 @@ extern char initial_stab[];
#define HPTE_R_PP0 ASM_CONST(0x8000000000000000)
#define HPTE_R_TS ASM_CONST(0x4000000000000000)
#define HPTE_R_KEY_HI ASM_CONST(0x3000000000000000)
#define HPTE_R_RPN_SHIFT 12
#define HPTE_R_RPN ASM_CONST(0x3ffffffffffff000)
#define HPTE_R_FLAGS ASM_CONST(0x00000000000003ff)
#define HPTE_R_RPN ASM_CONST(0x0ffffffffffff000)
#define HPTE_R_PP ASM_CONST(0x0000000000000003)
#define HPTE_R_N ASM_CONST(0x0000000000000004)
#define HPTE_R_G ASM_CONST(0x0000000000000008)
#define HPTE_R_M ASM_CONST(0x0000000000000010)
#define HPTE_R_I ASM_CONST(0x0000000000000020)
#define HPTE_R_W ASM_CONST(0x0000000000000040)
#define HPTE_R_WIMG ASM_CONST(0x0000000000000078)
#define HPTE_R_C ASM_CONST(0x0000000000000080)
#define HPTE_R_R ASM_CONST(0x0000000000000100)
#define HPTE_R_KEY_LO ASM_CONST(0x0000000000000e00)
#define HPTE_V_1TB_SEG ASM_CONST(0x4000000000000000)
#define HPTE_V_VRMA_MASK ASM_CONST(0x4001ffffff000000)
arch/powerpc/include/asm/paca.h
+2
View File
@@ -147,8 +147,10 @@ struct paca_struct {
struct dtl_entry *dtl_curr; /* pointer corresponding to dtl_ridx */
#ifdef CONFIG_KVM_BOOK3S_HANDLER
#ifdef CONFIG_KVM_BOOK3S_PR
/* We use this to store guest state in */
struct kvmppc_book3s_shadow_vcpu shadow_vcpu;
#endif
struct kvmppc_host_state kvm_hstate;
#endif
};
arch/powerpc/include/asm/reg.h
+4
View File
@@ -189,6 +189,9 @@
#define SPRN_CTR 0x009 /* Count Register */
#define SPRN_DSCR 0x11
#define SPRN_CFAR 0x1c /* Come From Address Register */
#define SPRN_AMR 0x1d /* Authority Mask Register */
#define SPRN_UAMOR 0x9d /* User Authority Mask Override Register */
#define SPRN_AMOR 0x15d /* Authority Mask Override Register */
#define SPRN_ACOP 0x1F /* Available Coprocessor Register */
#define SPRN_CTRLF 0x088
#define SPRN_CTRLT 0x098
@@ -252,6 +255,7 @@
#define LPCR_RMI 0x00000002 /* real mode is cache inhibit */
#define LPCR_HDICE 0x00000001 /* Hyp Decr enable (HV,PR,EE) */
#define SPRN_LPID 0x13F /* Logical Partition Identifier */
#define LPID_RSVD 0x3ff /* Reserved LPID for partn switching */
#define SPRN_HMER 0x150 /* Hardware m? error recovery */
#define SPRN_HMEER 0x151 /* Hardware m? enable error recovery */
#define SPRN_HEIR 0x153 /* Hypervisor Emulated Instruction Register */
arch/powerpc/kernel/asm-offsets.c
+79
View File
@@ -187,6 +187,7 @@ int main(void)
DEFINE(LPPACASRR1, offsetof(struct lppaca, saved_srr1));
DEFINE(LPPACAANYINT, offsetof(struct lppaca, int_dword.any_int));
DEFINE(LPPACADECRINT, offsetof(struct lppaca, int_dword.fields.decr_int));
DEFINE(LPPACA_PMCINUSE, offsetof(struct lppaca, pmcregs_in_use));
DEFINE(LPPACA_DTLIDX, offsetof(struct lppaca, dtl_idx));
DEFINE(PACA_DTL_RIDX, offsetof(struct paca_struct, dtl_ridx));
#endif /* CONFIG_PPC_STD_MMU_64 */
@@ -392,6 +393,29 @@ int main(void)
DEFINE(VCPU_HOST_PID, offsetof(struct kvm_vcpu, arch.host_pid));
DEFINE(VCPU_GPRS, offsetof(struct kvm_vcpu, arch.gpr));
DEFINE(VCPU_VRSAVE, offsetof(struct kvm_vcpu, arch.vrsave));
DEFINE(VCPU_FPRS, offsetof(struct kvm_vcpu, arch.fpr));
DEFINE(VCPU_FPSCR, offsetof(struct kvm_vcpu, arch.fpscr));
#ifdef CONFIG_ALTIVEC
DEFINE(VCPU_VRS, offsetof(struct kvm_vcpu, arch.vr));
DEFINE(VCPU_VSCR, offsetof(struct kvm_vcpu, arch.vscr));
#endif
#ifdef CONFIG_VSX
DEFINE(VCPU_VSRS, offsetof(struct kvm_vcpu, arch.vsr));
#endif
DEFINE(VCPU_XER, offsetof(struct kvm_vcpu, arch.xer));
DEFINE(VCPU_CTR, offsetof(struct kvm_vcpu, arch.ctr));
DEFINE(VCPU_LR, offsetof(struct kvm_vcpu, arch.lr));
DEFINE(VCPU_CR, offsetof(struct kvm_vcpu, arch.cr));
DEFINE(VCPU_PC, offsetof(struct kvm_vcpu, arch.pc));
#ifdef CONFIG_KVM_BOOK3S_64_HV
DEFINE(VCPU_MSR, offsetof(struct kvm_vcpu, arch.shregs.msr));
DEFINE(VCPU_SRR0, offsetof(struct kvm_vcpu, arch.shregs.srr0));
DEFINE(VCPU_SRR1, offsetof(struct kvm_vcpu, arch.shregs.srr1));
DEFINE(VCPU_SPRG0, offsetof(struct kvm_vcpu, arch.shregs.sprg0));
DEFINE(VCPU_SPRG1, offsetof(struct kvm_vcpu, arch.shregs.sprg1));
DEFINE(VCPU_SPRG2, offsetof(struct kvm_vcpu, arch.shregs.sprg2));
DEFINE(VCPU_SPRG3, offsetof(struct kvm_vcpu, arch.shregs.sprg3));
#endif
DEFINE(VCPU_SPRG4, offsetof(struct kvm_vcpu, arch.sprg4));
DEFINE(VCPU_SPRG5, offsetof(struct kvm_vcpu, arch.sprg5));
DEFINE(VCPU_SPRG6, offsetof(struct kvm_vcpu, arch.sprg6));
@@ -403,17 +427,60 @@ int main(void)
DEFINE(VCPU_SHADOW_MSR, offsetof(struct kvm_vcpu, arch.shadow_msr));
/* book3s */
#ifdef CONFIG_KVM_BOOK3S_64_HV
DEFINE(KVM_LPID, offsetof(struct kvm, arch.lpid));
DEFINE(KVM_SDR1, offsetof(struct kvm, arch.sdr1));
DEFINE(KVM_HOST_LPID, offsetof(struct kvm, arch.host_lpid));
DEFINE(KVM_HOST_LPCR, offsetof(struct kvm, arch.host_lpcr));
DEFINE(KVM_HOST_SDR1, offsetof(struct kvm, arch.host_sdr1));
DEFINE(KVM_TLBIE_LOCK, offsetof(struct kvm, arch.tlbie_lock));
DEFINE(KVM_ONLINE_CPUS, offsetof(struct kvm, online_vcpus.counter));
DEFINE(KVM_LAST_VCPU, offsetof(struct kvm, arch.last_vcpu));
DEFINE(VCPU_DSISR, offsetof(struct kvm_vcpu, arch.shregs.dsisr));
DEFINE(VCPU_DAR, offsetof(struct kvm_vcpu, arch.shregs.dar));
#endif
#ifdef CONFIG_PPC_BOOK3S
DEFINE(VCPU_KVM, offsetof(struct kvm_vcpu, kvm));
DEFINE(VCPU_VCPUID, offsetof(struct kvm_vcpu, vcpu_id));
DEFINE(VCPU_HOST_RETIP, offsetof(struct kvm_vcpu, arch.host_retip));
DEFINE(VCPU_HOST_MSR, offsetof(struct kvm_vcpu, arch.host_msr));
DEFINE(VCPU_PURR, offsetof(struct kvm_vcpu, arch.purr));
DEFINE(VCPU_SPURR, offsetof(struct kvm_vcpu, arch.spurr));
DEFINE(VCPU_DSCR, offsetof(struct kvm_vcpu, arch.dscr));
DEFINE(VCPU_AMR, offsetof(struct kvm_vcpu, arch.amr));
DEFINE(VCPU_UAMOR, offsetof(struct kvm_vcpu, arch.uamor));
DEFINE(VCPU_CTRL, offsetof(struct kvm_vcpu, arch.ctrl));
DEFINE(VCPU_DABR, offsetof(struct kvm_vcpu, arch.dabr));
DEFINE(VCPU_TRAMPOLINE_LOWMEM, offsetof(struct kvm_vcpu, arch.trampoline_lowmem));
DEFINE(VCPU_TRAMPOLINE_ENTER, offsetof(struct kvm_vcpu, arch.trampoline_enter));
DEFINE(VCPU_HIGHMEM_HANDLER, offsetof(struct kvm_vcpu, arch.highmem_handler));
DEFINE(VCPU_RMCALL, offsetof(struct kvm_vcpu, arch.rmcall));
DEFINE(VCPU_HFLAGS, offsetof(struct kvm_vcpu, arch.hflags));
DEFINE(VCPU_DEC, offsetof(struct kvm_vcpu, arch.dec));
DEFINE(VCPU_DEC_EXPIRES, offsetof(struct kvm_vcpu, arch.dec_expires));
DEFINE(VCPU_LPCR, offsetof(struct kvm_vcpu, arch.lpcr));
DEFINE(VCPU_MMCR, offsetof(struct kvm_vcpu, arch.mmcr));
DEFINE(VCPU_PMC, offsetof(struct kvm_vcpu, arch.pmc));
DEFINE(VCPU_SLB, offsetof(struct kvm_vcpu, arch.slb));
DEFINE(VCPU_SLB_MAX, offsetof(struct kvm_vcpu, arch.slb_max));
DEFINE(VCPU_SLB_NR, offsetof(struct kvm_vcpu, arch.slb_nr));
DEFINE(VCPU_LAST_CPU, offsetof(struct kvm_vcpu, arch.last_cpu));
DEFINE(VCPU_FAULT_DSISR, offsetof(struct kvm_vcpu, arch.fault_dsisr));
DEFINE(VCPU_FAULT_DAR, offsetof(struct kvm_vcpu, arch.fault_dar));
DEFINE(VCPU_LAST_INST, offsetof(struct kvm_vcpu, arch.last_inst));
DEFINE(VCPU_TRAP, offsetof(struct kvm_vcpu, arch.trap));
DEFINE(VCPU_SVCPU, offsetof(struct kvmppc_vcpu_book3s, shadow_vcpu) -
offsetof(struct kvmppc_vcpu_book3s, vcpu));
DEFINE(VCPU_SLB_E, offsetof(struct kvmppc_slb, orige));
DEFINE(VCPU_SLB_V, offsetof(struct kvmppc_slb, origv));
DEFINE(VCPU_SLB_SIZE, sizeof(struct kvmppc_slb));
#ifdef CONFIG_PPC_BOOK3S_64
#ifdef CONFIG_KVM_BOOK3S_PR
# define SVCPU_FIELD(x, f) DEFINE(x, offsetof(struct paca_struct, shadow_vcpu.f))
#else
# define SVCPU_FIELD(x, f)
#endif
# define HSTATE_FIELD(x, f) DEFINE(x, offsetof(struct paca_struct, kvm_hstate.f))
#else /* 32-bit */
# define SVCPU_FIELD(x, f) DEFINE(x, offsetof(struct kvmppc_book3s_shadow_vcpu, f))
@@ -453,11 +520,23 @@ int main(void)
HSTATE_FIELD(HSTATE_HOST_R1, host_r1);
HSTATE_FIELD(HSTATE_HOST_R2, host_r2);
HSTATE_FIELD(HSTATE_HOST_MSR, host_msr);
HSTATE_FIELD(HSTATE_VMHANDLER, vmhandler);
HSTATE_FIELD(HSTATE_SCRATCH0, scratch0);
HSTATE_FIELD(HSTATE_SCRATCH1, scratch1);
HSTATE_FIELD(HSTATE_IN_GUEST, in_guest);
#ifdef CONFIG_KVM_BOOK3S_64_HV
HSTATE_FIELD(HSTATE_KVM_VCPU, kvm_vcpu);
HSTATE_FIELD(HSTATE_MMCR, host_mmcr);
HSTATE_FIELD(HSTATE_PMC, host_pmc);
HSTATE_FIELD(HSTATE_PURR, host_purr);
HSTATE_FIELD(HSTATE_SPURR, host_spurr);
HSTATE_FIELD(HSTATE_DSCR, host_dscr);
HSTATE_FIELD(HSTATE_DABR, dabr);
HSTATE_FIELD(HSTATE_DECEXP, dec_expires);
#endif /* CONFIG_KVM_BOOK3S_64_HV */
#else /* CONFIG_PPC_BOOK3S */
DEFINE(VCPU_CR, offsetof(struct kvm_vcpu, arch.cr));
DEFINE(VCPU_XER, offsetof(struct kvm_vcpu, arch.xer));
arch/powerpc/kernel/exceptions-64s.S
+32 -28
View File
@@ -87,14 +87,14 @@ data_access_not_stab:
END_MMU_FTR_SECTION_IFCLR(MMU_FTR_SLB)
#endif
EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common, EXC_STD,
KVMTEST, 0x300)
KVMTEST_PR, 0x300)
. = 0x380
.globl data_access_slb_pSeries
data_access_slb_pSeries:
HMT_MEDIUM
SET_SCRATCH0(r13)
EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x380)
EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_PR, 0x380)
std r3,PACA_EXSLB+EX_R3(r13)
mfspr r3,SPRN_DAR
#ifdef __DISABLED__
@@ -125,7 +125,7 @@ data_access_slb_pSeries:
instruction_access_slb_pSeries:
HMT_MEDIUM
SET_SCRATCH0(r13)
EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x480)
EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_PR, 0x480)
std r3,PACA_EXSLB+EX_R3(r13)
mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */
#ifdef __DISABLED__
@@ -153,32 +153,32 @@ instruction_access_slb_pSeries:
hardware_interrupt_pSeries:
hardware_interrupt_hv:
BEGIN_FTR_SECTION
_MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt,
EXC_STD, SOFTEN_TEST)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x500)
FTR_SECTION_ELSE
_MASKABLE_EXCEPTION_PSERIES(0x502, hardware_interrupt,
EXC_HV, SOFTEN_TEST_HV)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x502)
ALT_FTR_SECTION_END_IFCLR(CPU_FTR_HVMODE_206)
FTR_SECTION_ELSE
_MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt,
EXC_STD, SOFTEN_TEST_PR)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x500)
ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE_206)
STD_EXCEPTION_PSERIES(0x600, 0x600, alignment)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x600)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x600)
STD_EXCEPTION_PSERIES(0x700, 0x700, program_check)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x700)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x700)
STD_EXCEPTION_PSERIES(0x800, 0x800, fp_unavailable)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x800)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x800)
MASKABLE_EXCEPTION_PSERIES(0x900, 0x900, decrementer)
MASKABLE_EXCEPTION_HV(0x980, 0x982, decrementer)
STD_EXCEPTION_PSERIES(0xa00, 0xa00, trap_0a)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xa00)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xa00)
STD_EXCEPTION_PSERIES(0xb00, 0xb00, trap_0b)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xb00)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xb00)
. = 0xc00
.globl system_call_pSeries
@@ -219,7 +219,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE)
b .
STD_EXCEPTION_PSERIES(0xd00, 0xd00, single_step)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xd00)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xd00)
/* At 0xe??? we have a bunch of hypervisor exceptions, we branch
* out of line to handle them
@@ -254,23 +254,23 @@ vsx_unavailable_pSeries_1:
#ifdef CONFIG_CBE_RAS
STD_EXCEPTION_HV(0x1200, 0x1202, cbe_system_error)
KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1202)
KVM_HANDLER_PR_SKIP(PACA_EXGEN, EXC_HV, 0x1202)
#endif /* CONFIG_CBE_RAS */
STD_EXCEPTION_PSERIES(0x1300, 0x1300, instruction_breakpoint)
KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x1300)
KVM_HANDLER_PR_SKIP(PACA_EXGEN, EXC_STD, 0x1300)
#ifdef CONFIG_CBE_RAS
STD_EXCEPTION_HV(0x1600, 0x1602, cbe_maintenance)
KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1602)
KVM_HANDLER_PR_SKIP(PACA_EXGEN, EXC_HV, 0x1602)
#endif /* CONFIG_CBE_RAS */
STD_EXCEPTION_PSERIES(0x1700, 0x1700, altivec_assist)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x1700)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x1700)
#ifdef CONFIG_CBE_RAS
STD_EXCEPTION_HV(0x1800, 0x1802, cbe_thermal)
KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1802)
KVM_HANDLER_PR_SKIP(PACA_EXGEN, EXC_HV, 0x1802)
#endif /* CONFIG_CBE_RAS */
. = 0x3000
@@ -297,7 +297,7 @@ data_access_check_stab:
mfspr r9,SPRN_DSISR
srdi r10,r10,60
rlwimi r10,r9,16,0x20
#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
#ifdef CONFIG_KVM_BOOK3S_PR
lbz r9,HSTATE_IN_GUEST(r13)
rlwimi r10,r9,8,0x300
#endif
@@ -316,11 +316,11 @@ do_stab_bolted_pSeries:
EXCEPTION_PROLOG_PSERIES_1(.do_stab_bolted, EXC_STD)
#endif /* CONFIG_POWER4_ONLY */
KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x300)
KVM_HANDLER_SKIP(PACA_EXSLB, EXC_STD, 0x380)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x400)
KVM_HANDLER(PACA_EXSLB, EXC_STD, 0x480)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x900)
KVM_HANDLER_PR_SKIP(PACA_EXGEN, EXC_STD, 0x300)
KVM_HANDLER_PR_SKIP(PACA_EXSLB, EXC_STD, 0x380)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x400)
KVM_HANDLER_PR(PACA_EXSLB, EXC_STD, 0x480)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x900)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x982)
.align 7
@@ -336,11 +336,11 @@ do_stab_bolted_pSeries:
/* moved from 0xf00 */
STD_EXCEPTION_PSERIES(., 0xf00, performance_monitor)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf00)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf00)
STD_EXCEPTION_PSERIES(., 0xf20, altivec_unavailable)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf20)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf20)
STD_EXCEPTION_PSERIES(., 0xf40, vsx_unavailable)
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf40)
KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0xf40)
/*
* An interrupt came in while soft-disabled; clear EE in SRR1,
@@ -417,7 +417,11 @@ slb_miss_user_pseries:
/* KVM's trampoline code needs to be close to the interrupt handlers */
#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
#ifdef CONFIG_KVM_BOOK3S_PR
#include "../kvm/book3s_rmhandlers.S"
#else
#include "../kvm/book3s_hv_rmhandlers.S"
#endif
#endif
.align 7
arch/powerpc/kernel/process.c
+3
View File
@@ -96,6 +96,7 @@ void flush_fp_to_thread(struct task_struct *tsk)
preempt_enable();
}
}
EXPORT_SYMBOL_GPL(flush_fp_to_thread);
void enable_kernel_fp(void)
{
@@ -145,6 +146,7 @@ void flush_altivec_to_thread(struct task_struct *tsk)
preempt_enable();
}
}
EXPORT_SYMBOL_GPL(flush_altivec_to_thread);
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_VSX
@@ -186,6 +188,7 @@ void flush_vsx_to_thread(struct task_struct *tsk)
preempt_enable();
}
}
EXPORT_SYMBOL_GPL(flush_vsx_to_thread);
#endif /* CONFIG_VSX */
#ifdef CONFIG_SPE
arch/powerpc/kernel/setup-common.c
+3
View File
@@ -375,6 +375,9 @@ void __init check_for_initrd(void)
int threads_per_core, threads_shift;
cpumask_t threads_core_mask;
EXPORT_SYMBOL_GPL(threads_per_core);
EXPORT_SYMBOL_GPL(threads_shift);
EXPORT_SYMBOL_GPL(threads_core_mask);
static void __init cpu_init_thread_core_maps(int tpc)
{
arch/powerpc/kernel/smp.c
+1
View File
@@ -243,6 +243,7 @@ void smp_send_reschedule(int cpu)
if (likely(smp_ops))
smp_ops->message_pass(cpu, PPC_MSG_RESCHEDULE);
}
EXPORT_SYMBOL_GPL(smp_send_reschedule);
void arch_send_call_function_single_ipi(int cpu)
{
arch/powerpc/kvm/Kconfig
+35 -2
View File
@@ -20,7 +20,6 @@ config KVM
bool
select PREEMPT_NOTIFIERS
select ANON_INODES
select KVM_MMIO
config KVM_BOOK3S_HANDLER
bool
@@ -28,16 +27,22 @@ config KVM_BOOK3S_HANDLER
config KVM_BOOK3S_32_HANDLER
bool
select KVM_BOOK3S_HANDLER
select KVM_MMIO
config KVM_BOOK3S_64_HANDLER
bool
select KVM_BOOK3S_HANDLER
config KVM_BOOK3S_PR
bool
select KVM_MMIO
config KVM_BOOK3S_32
tristate "KVM support for PowerPC book3s_32 processors"
depends on EXPERIMENTAL && PPC_BOOK3S_32 && !SMP && !PTE_64BIT
select KVM
select KVM_BOOK3S_32_HANDLER
select KVM_BOOK3S_PR
---help---
Support running unmodified book3s_32 guest kernels
in virtual machines on book3s_32 host processors.
@@ -50,8 +55,8 @@ config KVM_BOOK3S_32
config KVM_BOOK3S_64
tristate "KVM support for PowerPC book3s_64 processors"
depends on EXPERIMENTAL && PPC_BOOK3S_64
select KVM
select KVM_BOOK3S_64_HANDLER
select KVM
---help---
Support running unmodified book3s_64 and book3s_32 guest kernels
in virtual machines on book3s_64 host processors.
@@ -61,10 +66,37 @@ config KVM_BOOK3S_64
If unsure, say N.
config KVM_BOOK3S_64_HV
bool "KVM support for POWER7 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.
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.
If unsure, say N.
config KVM_BOOK3S_64_PR
def_bool y
depends on KVM_BOOK3S_64 && !KVM_BOOK3S_64_HV
select KVM_BOOK3S_PR
config KVM_440
bool "KVM support for PowerPC 440 processors"
depends on EXPERIMENTAL && 44x
select KVM
select KVM_MMIO
---help---
Support running unmodified 440 guest kernels in virtual machines on
440 host processors.
@@ -89,6 +121,7 @@ config KVM_E500
bool "KVM support for PowerPC E500 processors"
depends on EXPERIMENTAL && E500
select KVM
select KVM_MMIO
---help---
Support running unmodified E500 guest kernels in virtual machines on
E500 host processors.
arch/powerpc/kvm/Makefile
+14 -3
View File
@@ -38,11 +38,10 @@ kvm-e500-objs := \
e500_emulate.o
kvm-objs-$(CONFIG_KVM_E500) := $(kvm-e500-objs)
kvm-book3s_64-objs := \
$(common-objs-y) \
kvm-book3s_64-objs-$(CONFIG_KVM_BOOK3S_64_PR) := \
../../../virt/kvm/coalesced_mmio.o \
fpu.o \
book3s_paired_singles.o \
book3s.o \
book3s_pr.o \
book3s_emulate.o \
book3s_interrupts.o \
@@ -50,6 +49,18 @@ kvm-book3s_64-objs := \
book3s_64_mmu_host.o \
book3s_64_mmu.o \
book3s_32_mmu.o
kvm-book3s_64-objs-$(CONFIG_KVM_BOOK3S_64_HV) := \
book3s_hv.o \
book3s_hv_interrupts.o \
book3s_64_mmu_hv.o
kvm-book3s_64-objs := \
../../../virt/kvm/kvm_main.o \
powerpc.o \
emulate.o \
book3s.o \
$(kvm-book3s_64-objs-y)
kvm-objs-$(CONFIG_KVM_BOOK3S_64) := $(kvm-book3s_64-objs)
kvm-book3s_32-objs := \
arch/powerpc/kvm/book3s_64_mmu_hv.c
+258
View File
@@ -0,0 +1,258 @@
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright 2010 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
*/
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kvm.h>
#include <linux/kvm_host.h>
#include <linux/highmem.h>
#include <linux/gfp.h>
#include <linux/slab.h>
#include <linux/hugetlb.h>
#include <asm/tlbflush.h>
#include <asm/kvm_ppc.h>
#include <asm/kvm_book3s.h>
#include <asm/mmu-hash64.h>
#include <asm/hvcall.h>
#include <asm/synch.h>
#include <asm/ppc-opcode.h>
#include <asm/cputable.h>
/* For now use fixed-size 16MB page table */
#define HPT_ORDER 24
#define HPT_NPTEG (1ul << (HPT_ORDER - 7)) /* 128B per pteg */
#define HPT_HASH_MASK (HPT_NPTEG - 1)
/* Pages in the VRMA are 16MB pages */
#define VRMA_PAGE_ORDER 24
#define VRMA_VSID 0x1ffffffUL /* 1TB VSID reserved for VRMA */
#define NR_LPIDS (LPID_RSVD + 1)
unsigned long lpid_inuse[BITS_TO_LONGS(NR_LPIDS)];
long kvmppc_alloc_hpt(struct kvm *kvm)
{
unsigned long hpt;
unsigned long lpid;
hpt = __get_free_pages(GFP_KERNEL|__GFP_ZERO|__GFP_REPEAT|__GFP_NOWARN,
HPT_ORDER - PAGE_SHIFT);
if (!hpt) {
pr_err("kvm_alloc_hpt: Couldn't alloc HPT\n");
return -ENOMEM;
}
kvm->arch.hpt_virt = hpt;
do {
lpid = find_first_zero_bit(lpid_inuse, NR_LPIDS);
if (lpid >= NR_LPIDS) {
pr_err("kvm_alloc_hpt: No LPIDs free\n");
free_pages(hpt, HPT_ORDER - PAGE_SHIFT);
return -ENOMEM;
}
} while (test_and_set_bit(lpid, lpid_inuse));
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;
}
void kvmppc_free_hpt(struct kvm *kvm)
{
unsigned long i;
struct kvmppc_pginfo *pginfo;
clear_bit(kvm->arch.lpid, lpid_inuse);
free_pages(kvm->arch.hpt_virt, HPT_ORDER - PAGE_SHIFT);
if (kvm->arch.ram_pginfo) {
pginfo = kvm->arch.ram_pginfo;
kvm->arch.ram_pginfo = NULL;
for (i = 0; i < kvm->arch.ram_npages; ++i)
put_page(pfn_to_page(pginfo[i].pfn));
kfree(pginfo);
}
}
static unsigned long user_page_size(unsigned long addr)
{
struct vm_area_struct *vma;
unsigned long size = PAGE_SIZE;
down_read(&current->mm->mmap_sem);
vma = find_vma(current->mm, addr);
if (vma)
size = vma_kernel_pagesize(vma);
up_read(&current->mm->mmap_sem);
return size;
}
static pfn_t hva_to_pfn(unsigned long addr)
{
struct page *page[1];
int npages;
might_sleep();
npages = get_user_pages_fast(addr, 1, 1, page);
if (unlikely(npages != 1))
return 0;
return page_to_pfn(page[0]);
}
long kvmppc_prepare_vrma(struct kvm *kvm,
struct kvm_userspace_memory_region *mem)
{
unsigned long psize, porder;
unsigned long i, npages;
struct kvmppc_pginfo *pginfo;
pfn_t pfn;
unsigned long hva;
/* First see what page size we have */
psize = user_page_size(mem->userspace_addr);
/* For now, only allow 16MB pages */
if (psize != 1ul << VRMA_PAGE_ORDER || (mem->memory_size & (psize - 1))) {
pr_err("bad psize=%lx memory_size=%llx @ %llx\n",
psize, mem->memory_size, mem->userspace_addr);
return -EINVAL;
}
porder = __ilog2(psize);
npages = mem->memory_size >> porder;
pginfo = kzalloc(npages * sizeof(struct kvmppc_pginfo), GFP_KERNEL);
if (!pginfo) {
pr_err("kvmppc_prepare_vrma: couldn't alloc %lu bytes\n",
npages * sizeof(struct kvmppc_pginfo));
return -ENOMEM;
}
for (i = 0; i < npages; ++i) {
hva = mem->userspace_addr + (i << porder);
if (user_page_size(hva) != psize)
goto err;
pfn = hva_to_pfn(hva);
if (pfn == 0) {
pr_err("oops, no pfn for hva %lx\n", hva);
goto err;
}
if (pfn & ((1ul << (porder - PAGE_SHIFT)) - 1)) {
pr_err("oops, unaligned pfn %llx\n", pfn);
put_page(pfn_to_page(pfn));
goto err;
}
pginfo[i].pfn = pfn;
}
kvm->arch.ram_npages = npages;
kvm->arch.ram_psize = psize;
kvm->arch.ram_porder = porder;
kvm->arch.ram_pginfo = pginfo;
return 0;
err:
kfree(pginfo);
return -EINVAL;
}
void kvmppc_map_vrma(struct kvm *kvm, struct kvm_userspace_memory_region *mem)
{
unsigned long i;
unsigned long npages = kvm->arch.ram_npages;
unsigned long pfn;
unsigned long *hpte;
unsigned long hash;
struct kvmppc_pginfo *pginfo = kvm->arch.ram_pginfo;
if (!pginfo)
return;
/* VRMA can't be > 1TB */
if (npages > 1ul << (40 - kvm->arch.ram_porder))
npages = 1ul << (40 - kvm->arch.ram_porder);
/* Can't use more than 1 HPTE per HPTEG */
if (npages > HPT_NPTEG)
npages = HPT_NPTEG;
for (i = 0; i < npages; ++i) {
pfn = pginfo[i].pfn;
/* can't use hpt_hash since va > 64 bits */
hash = (i ^ (VRMA_VSID ^ (VRMA_VSID << 25))) & HPT_HASH_MASK;
/*
* We assume that the hash table is empty and no
* vcpus are using it at this stage. Since we create
* at most one HPTE per HPTEG, we just assume entry 7
* is available and use it.
*/
hpte = (unsigned long *) (kvm->arch.hpt_virt + (hash << 7));
hpte += 7 * 2;
/* HPTE low word - RPN, protection, etc. */
hpte[1] = (pfn << PAGE_SHIFT) | HPTE_R_R | HPTE_R_C |
HPTE_R_M | PP_RWXX;
wmb();
hpte[0] = HPTE_V_1TB_SEG | (VRMA_VSID << (40 - 16)) |
(i << (VRMA_PAGE_ORDER - 16)) | HPTE_V_BOLTED |
HPTE_V_LARGE | HPTE_V_VALID;
}
}
int kvmppc_mmu_hv_init(void)
{
if (!cpu_has_feature(CPU_FTR_HVMODE_206))
return -EINVAL;
memset(lpid_inuse, 0, sizeof(lpid_inuse));
set_bit(mfspr(SPRN_LPID), lpid_inuse);
set_bit(LPID_RSVD, lpid_inuse);
return 0;
}
void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
{
}
static void kvmppc_mmu_book3s_64_hv_reset_msr(struct kvm_vcpu *vcpu)
{
kvmppc_set_msr(vcpu, MSR_SF | MSR_ME);
}
static int kvmppc_mmu_book3s_64_hv_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
struct kvmppc_pte *gpte, bool data)
{
return -ENOENT;
}
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 */
mmu->xlate = kvmppc_mmu_book3s_64_hv_xlate;
mmu->reset_msr = kvmppc_mmu_book3s_64_hv_reset_msr;
vcpu->arch.hflags |= BOOK3S_HFLAG_SLB;
}

Some files were not shown because too many files have changed in this diff Show More