redonkable/remarkable-linux
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Merge branch 'for-kvm' into next

Browse source 
Topic branch for commits that the KVM tree might want to pull
in separately.

Hand merged a few files due to conflicts with the LE stuff

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2013-10-11 18:23:53 +11:00
parent 5293bf97a2 18461960cb
commit 3ad26e5c44
27 changed files with 442 additions and 384 deletions
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12
arch/powerpc/include/asm/machdep.h
View file

@ -78,6 +78,18 @@ struct machdep_calls {
long index);
void (*tce_flush)(struct iommu_table *tbl);
/* _rm versions are for real mode use only */
int (*tce_build_rm)(struct iommu_table *tbl,
long index,
long npages,
unsigned long uaddr,
enum dma_data_direction direction,
struct dma_attrs *attrs);
void (*tce_free_rm)(struct iommu_table *tbl,
long index,
long npages);
void (*tce_flush_rm)(struct iommu_table *tbl);
void __iomem * (*ioremap)(phys_addr_t addr, unsigned long size,
unsigned long flags, void *caller);
void (*iounmap)(volatile void __iomem *token);

2
arch/powerpc/include/asm/pgtable-ppc64.h
View file

@ -394,6 +394,8 @@ static inline void mark_hpte_slot_valid(unsigned char *hpte_slot_array,
hpte_slot_array[index] = hidx << 4 | 0x1 << 3;
}
struct page *realmode_pfn_to_page(unsigned long pfn);
static inline char *get_hpte_slot_array(pmd_t *pmdp)
{
/*

97
arch/powerpc/include/asm/ppc_asm.h
View file

@ -98,88 +98,32 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_SPLPAR)
#define REST_8GPRS(n, base) REST_4GPRS(n, base); REST_4GPRS(n+4, base)
#define REST_10GPRS(n, base) REST_8GPRS(n, base); REST_2GPRS(n+8, base)
#define SAVE_FPR(n, base) stfd n,THREAD_FPR0+8*TS_FPRWIDTH*(n)(base)
#define SAVE_FPR(n, base) stfd n,8*TS_FPRWIDTH*(n)(base)
#define SAVE_2FPRS(n, base) SAVE_FPR(n, base); SAVE_FPR(n+1, base)
#define SAVE_4FPRS(n, base) SAVE_2FPRS(n, base); SAVE_2FPRS(n+2, base)
#define SAVE_8FPRS(n, base) SAVE_4FPRS(n, base); SAVE_4FPRS(n+4, base)
#define SAVE_16FPRS(n, base) SAVE_8FPRS(n, base); SAVE_8FPRS(n+8, base)
#define SAVE_32FPRS(n, base) SAVE_16FPRS(n, base); SAVE_16FPRS(n+16, base)
#define REST_FPR(n, base) lfd n,THREAD_FPR0+8*TS_FPRWIDTH*(n)(base)
#define REST_FPR(n, base) lfd n,8*TS_FPRWIDTH*(n)(base)
#define REST_2FPRS(n, base) REST_FPR(n, base); REST_FPR(n+1, base)
#define REST_4FPRS(n, base) REST_2FPRS(n, base); REST_2FPRS(n+2, base)
#define REST_8FPRS(n, base) REST_4FPRS(n, base); REST_4FPRS(n+4, base)
#define REST_16FPRS(n, base) REST_8FPRS(n, base); REST_8FPRS(n+8, base)
#define REST_32FPRS(n, base) REST_16FPRS(n, base); REST_16FPRS(n+16, base)
#define SAVE_VR(n,b,base) li b,THREAD_VR0+(16*(n)); stvx n,base,b
#define SAVE_VR(n,b,base) li b,16*(n); stvx n,base,b
#define SAVE_2VRS(n,b,base) SAVE_VR(n,b,base); SAVE_VR(n+1,b,base)
#define SAVE_4VRS(n,b,base) SAVE_2VRS(n,b,base); SAVE_2VRS(n+2,b,base)
#define SAVE_8VRS(n,b,base) SAVE_4VRS(n,b,base); SAVE_4VRS(n+4,b,base)
#define SAVE_16VRS(n,b,base) SAVE_8VRS(n,b,base); SAVE_8VRS(n+8,b,base)
#define SAVE_32VRS(n,b,base) SAVE_16VRS(n,b,base); SAVE_16VRS(n+16,b,base)
#define REST_VR(n,b,base) li b,THREAD_VR0+(16*(n)); lvx n,base,b
#define REST_VR(n,b,base) li b,16*(n); lvx n,base,b
#define REST_2VRS(n,b,base) REST_VR(n,b,base); REST_VR(n+1,b,base)
#define REST_4VRS(n,b,base) REST_2VRS(n,b,base); REST_2VRS(n+2,b,base)
#define REST_8VRS(n,b,base) REST_4VRS(n,b,base); REST_4VRS(n+4,b,base)
#define REST_16VRS(n,b,base) REST_8VRS(n,b,base); REST_8VRS(n+8,b,base)
#define REST_32VRS(n,b,base) REST_16VRS(n,b,base); REST_16VRS(n+16,b,base)
/* Save/restore FPRs, VRs and VSRs from their checkpointed backups in
* thread_struct:
*/
#define SAVE_FPR_TRANSACT(n, base) stfd n,THREAD_TRANSACT_FPR0+ \
8*TS_FPRWIDTH*(n)(base)
#define SAVE_2FPRS_TRANSACT(n, base) SAVE_FPR_TRANSACT(n, base); \
SAVE_FPR_TRANSACT(n+1, base)
#define SAVE_4FPRS_TRANSACT(n, base) SAVE_2FPRS_TRANSACT(n, base); \
SAVE_2FPRS_TRANSACT(n+2, base)
#define SAVE_8FPRS_TRANSACT(n, base) SAVE_4FPRS_TRANSACT(n, base); \
SAVE_4FPRS_TRANSACT(n+4, base)
#define SAVE_16FPRS_TRANSACT(n, base) SAVE_8FPRS_TRANSACT(n, base); \
SAVE_8FPRS_TRANSACT(n+8, base)
#define SAVE_32FPRS_TRANSACT(n, base) SAVE_16FPRS_TRANSACT(n, base); \
SAVE_16FPRS_TRANSACT(n+16, base)
#define REST_FPR_TRANSACT(n, base) lfd n,THREAD_TRANSACT_FPR0+ \
8*TS_FPRWIDTH*(n)(base)
#define REST_2FPRS_TRANSACT(n, base) REST_FPR_TRANSACT(n, base); \
REST_FPR_TRANSACT(n+1, base)
#define REST_4FPRS_TRANSACT(n, base) REST_2FPRS_TRANSACT(n, base); \
REST_2FPRS_TRANSACT(n+2, base)
#define REST_8FPRS_TRANSACT(n, base) REST_4FPRS_TRANSACT(n, base); \
REST_4FPRS_TRANSACT(n+4, base)
#define REST_16FPRS_TRANSACT(n, base) REST_8FPRS_TRANSACT(n, base); \
REST_8FPRS_TRANSACT(n+8, base)
#define REST_32FPRS_TRANSACT(n, base) REST_16FPRS_TRANSACT(n, base); \
REST_16FPRS_TRANSACT(n+16, base)
#define SAVE_VR_TRANSACT(n,b,base) li b,THREAD_TRANSACT_VR0+(16*(n)); \
stvx n,b,base
#define SAVE_2VRS_TRANSACT(n,b,base) SAVE_VR_TRANSACT(n,b,base); \
SAVE_VR_TRANSACT(n+1,b,base)
#define SAVE_4VRS_TRANSACT(n,b,base) SAVE_2VRS_TRANSACT(n,b,base); \
SAVE_2VRS_TRANSACT(n+2,b,base)
#define SAVE_8VRS_TRANSACT(n,b,base) SAVE_4VRS_TRANSACT(n,b,base); \
SAVE_4VRS_TRANSACT(n+4,b,base)
#define SAVE_16VRS_TRANSACT(n,b,base) SAVE_8VRS_TRANSACT(n,b,base); \
SAVE_8VRS_TRANSACT(n+8,b,base)
#define SAVE_32VRS_TRANSACT(n,b,base) SAVE_16VRS_TRANSACT(n,b,base); \
SAVE_16VRS_TRANSACT(n+16,b,base)
#define REST_VR_TRANSACT(n,b,base) li b,THREAD_TRANSACT_VR0+(16*(n)); \
lvx n,b,base
#define REST_2VRS_TRANSACT(n,b,base) REST_VR_TRANSACT(n,b,base); \
REST_VR_TRANSACT(n+1,b,base)
#define REST_4VRS_TRANSACT(n,b,base) REST_2VRS_TRANSACT(n,b,base); \
REST_2VRS_TRANSACT(n+2,b,base)
#define REST_8VRS_TRANSACT(n,b,base) REST_4VRS_TRANSACT(n,b,base); \
REST_4VRS_TRANSACT(n+4,b,base)
#define REST_16VRS_TRANSACT(n,b,base) REST_8VRS_TRANSACT(n,b,base); \
REST_8VRS_TRANSACT(n+8,b,base)
#define REST_32VRS_TRANSACT(n,b,base) REST_16VRS_TRANSACT(n,b,base); \
REST_16VRS_TRANSACT(n+16,b,base)
#ifdef __BIG_ENDIAN__
#define STXVD2X_ROT(n,b,base) STXVD2X(n,b,base)
#define LXVD2X_ROT(n,b,base) LXVD2X(n,b,base)
@ -191,43 +135,14 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_SPLPAR)
#define LXVD2X_ROT(n,b,base) LXVD2X(n,b,base); \
XXSWAPD(n,n)
#endif
#define SAVE_VSR_TRANSACT(n,b,base) li b,THREAD_TRANSACT_VSR0+(16*(n)); \
STXVD2X_ROT(n,R##base,R##b)
#define SAVE_2VSRS_TRANSACT(n,b,base) SAVE_VSR_TRANSACT(n,b,base); \
SAVE_VSR_TRANSACT(n+1,b,base)
#define SAVE_4VSRS_TRANSACT(n,b,base) SAVE_2VSRS_TRANSACT(n,b,base); \
SAVE_2VSRS_TRANSACT(n+2,b,base)
#define SAVE_8VSRS_TRANSACT(n,b,base) SAVE_4VSRS_TRANSACT(n,b,base); \
SAVE_4VSRS_TRANSACT(n+4,b,base)
#define SAVE_16VSRS_TRANSACT(n,b,base) SAVE_8VSRS_TRANSACT(n,b,base); \
SAVE_8VSRS_TRANSACT(n+8,b,base)
#define SAVE_32VSRS_TRANSACT(n,b,base) SAVE_16VSRS_TRANSACT(n,b,base); \
SAVE_16VSRS_TRANSACT(n+16,b,base)
#define REST_VSR_TRANSACT(n,b,base) li b,THREAD_TRANSACT_VSR0+(16*(n)); \
LXVD2X_ROT(n,R##base,R##b)
#define REST_2VSRS_TRANSACT(n,b,base) REST_VSR_TRANSACT(n,b,base); \
REST_VSR_TRANSACT(n+1,b,base)
#define REST_4VSRS_TRANSACT(n,b,base) REST_2VSRS_TRANSACT(n,b,base); \
REST_2VSRS_TRANSACT(n+2,b,base)
#define REST_8VSRS_TRANSACT(n,b,base) REST_4VSRS_TRANSACT(n,b,base); \
REST_4VSRS_TRANSACT(n+4,b,base)
#define REST_16VSRS_TRANSACT(n,b,base) REST_8VSRS_TRANSACT(n,b,base); \
REST_8VSRS_TRANSACT(n+8,b,base)
#define REST_32VSRS_TRANSACT(n,b,base) REST_16VSRS_TRANSACT(n,b,base); \
REST_16VSRS_TRANSACT(n+16,b,base)
/* Save the lower 32 VSRs in the thread VSR region */
#define SAVE_VSR(n,b,base) li b,THREAD_VSR0+(16*(n)); \
STXVD2X_ROT(n,R##base,R##b)
#define SAVE_VSR(n,b,base) li b,16*(n); STXVD2X_ROT(n,R##base,R##b)
#define SAVE_2VSRS(n,b,base) SAVE_VSR(n,b,base); SAVE_VSR(n+1,b,base)
#define SAVE_4VSRS(n,b,base) SAVE_2VSRS(n,b,base); SAVE_2VSRS(n+2,b,base)
#define SAVE_8VSRS(n,b,base) SAVE_4VSRS(n,b,base); SAVE_4VSRS(n+4,b,base)
#define SAVE_16VSRS(n,b,base) SAVE_8VSRS(n,b,base); SAVE_8VSRS(n+8,b,base)
#define SAVE_32VSRS(n,b,base) SAVE_16VSRS(n,b,base); SAVE_16VSRS(n+16,b,base)
#define REST_VSR(n,b,base) li b,THREAD_VSR0+(16*(n)); \
LXVD2X_ROT(n,R##base,R##b)
#define REST_VSR(n,b,base) li b,16*(n); LXVD2X_ROT(n,R##base,R##b)
#define REST_2VSRS(n,b,base) REST_VSR(n,b,base); REST_VSR(n+1,b,base)
#define REST_4VSRS(n,b,base) REST_2VSRS(n,b,base); REST_2VSRS(n+2,b,base)
#define REST_8VSRS(n,b,base) REST_4VSRS(n,b,base); REST_4VSRS(n+4,b,base)

47
arch/powerpc/include/asm/processor.h
View file

@ -152,8 +152,20 @@ typedef struct {
unsigned long seg;
} mm_segment_t;
#define TS_FPR(i) fpr[i][TS_FPROFFSET]
#define TS_TRANS_FPR(i) transact_fpr[i][TS_FPROFFSET]
#define TS_FPR(i) fp_state.fpr[i][TS_FPROFFSET]
#define TS_TRANS_FPR(i) transact_fp.fpr[i][TS_FPROFFSET]
/* FP and VSX 0-31 register set */
struct thread_fp_state {
u64 fpr[32][TS_FPRWIDTH] __attribute__((aligned(16)));
u64 fpscr; /* Floating point status */
};
/* Complete AltiVec register set including VSCR */
struct thread_vr_state {
vector128 vr[32] __attribute__((aligned(16)));
vector128 vscr __attribute__((aligned(16)));
};
struct thread_struct {
unsigned long ksp; /* Kernel stack pointer */
@ -206,13 +218,8 @@ struct thread_struct {
unsigned long dvc2;
#endif
#endif
/* FP and VSX 0-31 register set */
double fpr[32][TS_FPRWIDTH] __attribute__((aligned(16)));
struct {
unsigned int pad;
unsigned int val; /* Floating point status */
} fpscr;
struct thread_fp_state fp_state;
struct thread_fp_state *fp_save_area;
int fpexc_mode; /* floating-point exception mode */
unsigned int align_ctl; /* alignment handling control */
#ifdef CONFIG_PPC64
@ -230,10 +237,8 @@ struct thread_struct {
struct arch_hw_breakpoint hw_brk; /* info on the hardware breakpoint */
unsigned long trap_nr; /* last trap # on this thread */
#ifdef CONFIG_ALTIVEC
/* Complete AltiVec register set */
vector128 vr[32] __attribute__((aligned(16)));
/* AltiVec status */
vector128 vscr __attribute__((aligned(16)));
struct thread_vr_state vr_state;
struct thread_vr_state *vr_save_area;
unsigned long vrsave;
int used_vr; /* set if process has used altivec */
#endif /* CONFIG_ALTIVEC */
@ -270,13 +275,8 @@ struct thread_struct {
* transact_fpr[] is the new set of transactional values.
* VRs work the same way.
*/
double transact_fpr[32][TS_FPRWIDTH];
struct {
unsigned int pad;
unsigned int val; /* Floating point status */
} transact_fpscr;
vector128 transact_vr[32] __attribute__((aligned(16)));
vector128 transact_vscr __attribute__((aligned(16)));
struct thread_fp_state transact_fp;
struct thread_vr_state transact_vr;
unsigned long transact_vrsave;
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
@ -330,8 +330,6 @@ struct thread_struct {
.ksp = INIT_SP, \
.regs = (struct pt_regs *)INIT_SP - 1, /* XXX bogus, I think */ \
.fs = KERNEL_DS, \
.fpr = {{0}}, \
.fpscr = { .val = 0, }, \
.fpexc_mode = 0, \
.ppr = INIT_PPR, \
}
@ -369,6 +367,11 @@ extern int set_endian(struct task_struct *tsk, unsigned int val);
extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr);
extern int set_unalign_ctl(struct task_struct *tsk, unsigned int val);
extern void load_fp_state(struct thread_fp_state *fp);
extern void store_fp_state(struct thread_fp_state *fp);
extern void load_vr_state(struct thread_vr_state *vr);
extern void store_vr_state(struct thread_vr_state *vr);
static inline unsigned int __unpack_fe01(unsigned long msr_bits)
{
return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8);

2
arch/powerpc/include/asm/sfp-machine.h
View file

@ -125,7 +125,7 @@
#define FP_EX_DIVZERO (1 << (31 - 5))
#define FP_EX_INEXACT (1 << (31 - 6))
#define __FPU_FPSCR (current->thread.fpscr.val)
#define __FPU_FPSCR (current->thread.fp_state.fpscr)
/* We only actually write to the destination register
* if exceptions signalled (if any) will not trap.

8
arch/powerpc/kernel/align.c
View file

@ -652,9 +652,9 @@ static int emulate_vsx(unsigned char __user *addr, unsigned int reg,
flush_vsx_to_thread(current);
if (reg < 32)
ptr = (char *) &current->thread.fpr[reg][0];
ptr = (char *) &current->thread.fp_state.fpr[reg][0];
else
ptr = (char *) &current->thread.vr[reg - 32];
ptr = (char *) &current->thread.vr_state.vr[reg - 32];
lptr = (unsigned long *) ptr;
@ -944,7 +944,7 @@ int fix_alignment(struct pt_regs *regs)
return -EFAULT;
} else if (flags & F) {
data.dd = current->thread.TS_FPR(reg);
data.ll = current->thread.TS_FPR(reg);
if (flags & S) {
/* Single-precision FP store requires conversion... */
#ifdef CONFIG_PPC_FPU
@ -1021,7 +1021,7 @@ int fix_alignment(struct pt_regs *regs)
if (unlikely(ret))
return -EFAULT;
} else if (flags & F)
current->thread.TS_FPR(reg) = data.dd;
current->thread.TS_FPR(reg) = data.ll;
else
regs->gpr[reg] = data.ll;

27
arch/powerpc/kernel/asm-offsets.c
View file

@ -90,16 +90,17 @@ int main(void)
DEFINE(THREAD_NORMSAVES, offsetof(struct thread_struct, normsave[0]));
#endif
DEFINE(THREAD_FPEXC_MODE, offsetof(struct thread_struct, fpexc_mode));
DEFINE(THREAD_FPR0, offsetof(struct thread_struct, fpr[0]));
DEFINE(THREAD_FPSCR, offsetof(struct thread_struct, fpscr));
DEFINE(THREAD_FPSTATE, offsetof(struct thread_struct, fp_state));
DEFINE(THREAD_FPSAVEAREA, offsetof(struct thread_struct, fp_save_area));
DEFINE(FPSTATE_FPSCR, offsetof(struct thread_fp_state, fpscr));
#ifdef CONFIG_ALTIVEC
DEFINE(THREAD_VR0, offsetof(struct thread_struct, vr[0]));
DEFINE(THREAD_VRSTATE, offsetof(struct thread_struct, vr_state));
DEFINE(THREAD_VRSAVEAREA, offsetof(struct thread_struct, vr_save_area));
DEFINE(THREAD_VRSAVE, offsetof(struct thread_struct, vrsave));
DEFINE(THREAD_VSCR, offsetof(struct thread_struct, vscr));
DEFINE(THREAD_USED_VR, offsetof(struct thread_struct, used_vr));
DEFINE(VRSTATE_VSCR, offsetof(struct thread_vr_state, vscr));
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_VSX
DEFINE(THREAD_VSR0, offsetof(struct thread_struct, fpr));
DEFINE(THREAD_USED_VSR, offsetof(struct thread_struct, used_vsr));
#endif /* CONFIG_VSX */
#ifdef CONFIG_PPC64
@ -143,20 +144,12 @@ int main(void)
DEFINE(THREAD_TM_PPR, offsetof(struct thread_struct, tm_ppr));
DEFINE(THREAD_TM_DSCR, offsetof(struct thread_struct, tm_dscr));
DEFINE(PT_CKPT_REGS, offsetof(struct thread_struct, ckpt_regs));
DEFINE(THREAD_TRANSACT_VR0, offsetof(struct thread_struct,
transact_vr[0]));
DEFINE(THREAD_TRANSACT_VSCR, offsetof(struct thread_struct,
transact_vscr));
DEFINE(THREAD_TRANSACT_VRSTATE, offsetof(struct thread_struct,
transact_vr));
DEFINE(THREAD_TRANSACT_VRSAVE, offsetof(struct thread_struct,
transact_vrsave));
DEFINE(THREAD_TRANSACT_FPR0, offsetof(struct thread_struct,
transact_fpr[0]));
DEFINE(THREAD_TRANSACT_FPSCR, offsetof(struct thread_struct,
transact_fpscr));
#ifdef CONFIG_VSX
DEFINE(THREAD_TRANSACT_VSR0, offsetof(struct thread_struct,
transact_fpr[0]));
#endif
DEFINE(THREAD_TRANSACT_FPSTATE, offsetof(struct thread_struct,
transact_fp));
/* Local pt_regs on stack for Transactional Memory funcs. */
DEFINE(TM_FRAME_SIZE, STACK_FRAME_OVERHEAD +
sizeof(struct pt_regs) + 16);

84
arch/powerpc/kernel/fpu.S
View file

@ -35,15 +35,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX); \
2: REST_32VSRS(n,c,base); \
3:
#define __REST_32FPVSRS_TRANSACT(n,c,base) \
BEGIN_FTR_SECTION \
b 2f; \
END_FTR_SECTION_IFSET(CPU_FTR_VSX); \
REST_32FPRS_TRANSACT(n,base); \
b 3f; \
2: REST_32VSRS_TRANSACT(n,c,base); \
3:
#define __SAVE_32FPVSRS(n,c,base) \
BEGIN_FTR_SECTION \
b 2f; \
@ -54,40 +45,12 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX); \
3:
#else
#define __REST_32FPVSRS(n,b,base) REST_32FPRS(n, base)
#define __REST_32FPVSRS_TRANSACT(n,b,base) REST_32FPRS(n, base)
#define __SAVE_32FPVSRS(n,b,base) SAVE_32FPRS(n, base)
#endif
#define REST_32FPVSRS(n,c,base) __REST_32FPVSRS(n,__REG_##c,__REG_##base)
#define REST_32FPVSRS_TRANSACT(n,c,base) \
__REST_32FPVSRS_TRANSACT(n,__REG_##c,__REG_##base)
#define SAVE_32FPVSRS(n,c,base) __SAVE_32FPVSRS(n,__REG_##c,__REG_##base)
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
/*
* Wrapper to call load_up_fpu from C.
* void do_load_up_fpu(struct pt_regs *regs);
*/
_GLOBAL(do_load_up_fpu)
mflr r0
std r0, 16(r1)
stdu r1, -112(r1)
subi r6, r3, STACK_FRAME_OVERHEAD
/* load_up_fpu expects r12=MSR, r13=PACA, and returns
* with r12 = new MSR.
*/
ld r12,_MSR(r6)
GET_PACA(r13)
bl load_up_fpu
std r12,_MSR(r6)
ld r0, 112+16(r1)
addi r1, r1, 112
mtlr r0
blr
/* void do_load_up_transact_fpu(struct thread_struct *thread)
*
* This is similar to load_up_fpu but for the transactional version of the FP
@ -105,9 +68,10 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
SYNC
MTMSRD(r5)
lfd fr0,THREAD_TRANSACT_FPSCR(r3)
addi r7,r3,THREAD_TRANSACT_FPSTATE
lfd fr0,FPSTATE_FPSCR(r7)
MTFSF_L(fr0)
REST_32FPVSRS_TRANSACT(0, R4, R3)
REST_32FPVSRS(0, R4, R7)
/* FP/VSX off again */
MTMSRD(r6)
@ -116,6 +80,26 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
blr
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
/*
* Load state from memory into FP registers including FPSCR.
* Assumes the caller has enabled FP in the MSR.
*/
_GLOBAL(load_fp_state)
lfd fr0,FPSTATE_FPSCR(r3)
MTFSF_L(fr0)
REST_32FPVSRS(0, R4, R3)
blr
/*
* Store FP state into memory, including FPSCR
* Assumes the caller has enabled FP in the MSR.
*/
_GLOBAL(store_fp_state)
SAVE_32FPVSRS(0, R4, R3)
mffs fr0
stfd fr0,FPSTATE_FPSCR(r3)
blr
/*
* This task wants to use the FPU now.
* On UP, disable FP for the task which had the FPU previously,
@ -147,9 +131,10 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
beq 1f
toreal(r4)
addi r4,r4,THREAD /* want last_task_used_math->thread */
SAVE_32FPVSRS(0, R5, R4)
addi r8,r4,THREAD_FPSTATE
SAVE_32FPVSRS(0, R5, R8)
mffs fr0
stfd fr0,THREAD_FPSCR(r4)
stfd fr0,FPSTATE_FPSCR(r8)
PPC_LL r5,PT_REGS(r4)
toreal(r5)
PPC_LL r4,_MSR-STACK_FRAME_OVERHEAD(r5)
@ -160,7 +145,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
#endif /* CONFIG_SMP */
/* enable use of FP after return */
#ifdef CONFIG_PPC32
mfspr r5,SPRN_SPRG_THREAD /* current task's THREAD (phys) */
mfspr r5,SPRN_SPRG_THREAD /* current task's THREAD (phys) */
lwz r4,THREAD_FPEXC_MODE(r5)
ori r9,r9,MSR_FP /* enable FP for current */
or r9,r9,r4
@ -172,9 +157,10 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
or r12,r12,r4
std r12,_MSR(r1)
#endif
lfd fr0,THREAD_FPSCR(r5)
addi r7,r5,THREAD_FPSTATE
lfd fr0,FPSTATE_FPSCR(r7)
MTFSF_L(fr0)
REST_32FPVSRS(0, R4, R5)
REST_32FPVSRS(0, R4, R7)
#ifndef CONFIG_SMP
subi r4,r5,THREAD
fromreal(r4)
@ -206,11 +192,15 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
PPC_LCMPI 0,r3,0
beqlr- /* if no previous owner, done */
addi r3,r3,THREAD /* want THREAD of task */
PPC_LL r6,THREAD_FPSAVEAREA(r3)
PPC_LL r5,PT_REGS(r3)
PPC_LCMPI 0,r5,0
SAVE_32FPVSRS(0, R4 ,R3)
PPC_LCMPI 0,r6,0
bne 2f
addi r6,r3,THREAD_FPSTATE
2: PPC_LCMPI 0,r5,0
SAVE_32FPVSRS(0, R4, R6)
mffs fr0
stfd fr0,THREAD_FPSCR(r3)
stfd fr0,FPSTATE_FPSCR(r6)
beq 1f
PPC_LL r4,_MSR-STACK_FRAME_OVERHEAD(r5)
li r3,MSR_FP|MSR_FE0|MSR_FE1

4
arch/powerpc/kernel/ppc_ksyms.c
View file

@ -100,9 +100,13 @@ EXPORT_SYMBOL(start_thread);
#ifdef CONFIG_PPC_FPU
EXPORT_SYMBOL(giveup_fpu);
EXPORT_SYMBOL(load_fp_state);
EXPORT_SYMBOL(store_fp_state);
#endif
#ifdef CONFIG_ALTIVEC
EXPORT_SYMBOL(giveup_altivec);
EXPORT_SYMBOL(load_vr_state);
EXPORT_SYMBOL(store_vr_state);
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_VSX
EXPORT_SYMBOL(giveup_vsx);

15
arch/powerpc/kernel/process.c
View file

@ -1008,6 +1008,11 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
p->thread.ptrace_bps[0] = NULL;
#endif
p->thread.fp_save_area = NULL;
#ifdef CONFIG_ALTIVEC
p->thread.vr_save_area = NULL;
#endif
#ifdef CONFIG_PPC_STD_MMU_64
if (mmu_has_feature(MMU_FTR_SLB)) {
unsigned long sp_vsid;
@ -1113,12 +1118,12 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp)
#ifdef CONFIG_VSX
current->thread.used_vsr = 0;
#endif
memset(current->thread.fpr, 0, sizeof(current->thread.fpr));
current->thread.fpscr.val = 0;
memset(&current->thread.fp_state, 0, sizeof(current->thread.fp_state));
current->thread.fp_save_area = NULL;
#ifdef CONFIG_ALTIVEC
memset(current->thread.vr, 0, sizeof(current->thread.vr));
memset(&current->thread.vscr, 0, sizeof(current->thread.vscr));
current->thread.vscr.u[3] = 0x00010000; /* Java mode disabled */
memset(&current->thread.vr_state, 0, sizeof(current->thread.vr_state));
current->thread.vr_state.vscr.u[3] = 0x00010000; /* Java mode disabled */
current->thread.vr_save_area = NULL;
current->thread.vrsave = 0;
current->thread.used_vr = 0;
#endif /* CONFIG_ALTIVEC */

49
arch/powerpc/kernel/ptrace.c
View file

@ -362,7 +362,7 @@ static int fpr_get(struct task_struct *target, const struct user_regset *regset,
void *kbuf, void __user *ubuf)
{
#ifdef CONFIG_VSX
double buf[33];
u64 buf[33];
int i;
#endif
flush_fp_to_thread(target);
@ -371,15 +371,15 @@ static int fpr_get(struct task_struct *target, const struct user_regset *regset,
/* copy to local buffer then write that out */
for (i = 0; i < 32 ; i++)
buf[i] = target->thread.TS_FPR(i);
memcpy(&buf[32], &target->thread.fpscr, sizeof(double));
buf[32] = target->thread.fp_state.fpscr;
return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
#else
BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) !=
offsetof(struct thread_struct, TS_FPR(32)));
BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
offsetof(struct thread_fp_state, fpr[32][0]));
return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&target->thread.fpr, 0, -1);
&target->thread.fp_state, 0, -1);
#endif
}
@ -388,7 +388,7 @@ static int fpr_set(struct task_struct *target, const struct user_regset *regset,
const void *kbuf, const void __user *ubuf)
{
#ifdef CONFIG_VSX
double buf[33];
u64 buf[33];
int i;
#endif
flush_fp_to_thread(target);
@ -400,14 +400,14 @@ static int fpr_set(struct task_struct *target, const struct user_regset *regset,
return i;
for (i = 0; i < 32 ; i++)
target->thread.TS_FPR(i) = buf[i];
memcpy(&target->thread.fpscr, &buf[32], sizeof(double));
target->thread.fp_state.fpscr = buf[32];
return 0;
#else
BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) !=
offsetof(struct thread_struct, TS_FPR(32)));
BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
offsetof(struct thread_fp_state, fpr[32][0]));
return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&target->thread.fpr, 0, -1);
&target->thread.fp_state, 0, -1);
#endif
}
@ -440,11 +440,11 @@ static int vr_get(struct task_struct *target, const struct user_regset *regset,
flush_altivec_to_thread(target);
BUILD_BUG_ON(offsetof(struct thread_struct, vscr) !=
offsetof(struct thread_struct, vr[32]));
BUILD_BUG_ON(offsetof(struct thread_vr_state, vscr) !=
offsetof(struct thread_vr_state, vr[32]));
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&target->thread.vr, 0,
&target->thread.vr_state, 0,
33 * sizeof(vector128));
if (!ret) {
/*
@ -471,11 +471,12 @@ static int vr_set(struct task_struct *target, const struct user_regset *regset,
flush_altivec_to_thread(target);
BUILD_BUG_ON(offsetof(struct thread_struct, vscr) !=
offsetof(struct thread_struct, vr[32]));
BUILD_BUG_ON(offsetof(struct thread_vr_state, vscr) !=
offsetof(struct thread_vr_state, vr[32]));
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&target->thread.vr, 0, 33 * sizeof(vector128));
&target->thread.vr_state, 0,
33 * sizeof(vector128));
if (!ret && count > 0) {
/*
* We use only the first word of vrsave.
@ -514,13 +515,13 @@ static int vsr_get(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
double buf[32];
u64 buf[32];
int ret, i;
flush_vsx_to_thread(target);
for (i = 0; i < 32 ; i++)
buf[i] = target->thread.fpr[i][TS_VSRLOWOFFSET];
buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
buf, 0, 32 * sizeof(double));
@ -531,7 +532,7 @@ static int vsr_set(struct task_struct *target, const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
double buf[32];
u64 buf[32];
int ret,i;
flush_vsx_to_thread(target);
@ -539,7 +540,7 @@ static int vsr_set(struct task_struct *target, const struct user_regset *regset,
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
buf, 0, 32 * sizeof(double));
for (i = 0; i < 32 ; i++)
target->thread.fpr[i][TS_VSRLOWOFFSET] = buf[i];
target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
return ret;
@ -1554,10 +1555,10 @@ long arch_ptrace(struct task_struct *child, long request,
flush_fp_to_thread(child);
if (fpidx < (PT_FPSCR - PT_FPR0))
memcpy(&tmp, &child->thread.TS_FPR(fpidx),
memcpy(&tmp, &child->thread.fp_state.fpr,
sizeof(long));
else
tmp = child->thread.fpscr.val;
tmp = child->thread.fp_state.fpscr;
}
ret = put_user(tmp, datalp);
break;
@ -1587,10 +1588,10 @@ long arch_ptrace(struct task_struct *child, long request,
flush_fp_to_thread(child);
if (fpidx < (PT_FPSCR - PT_FPR0))
memcpy(&child->thread.TS_FPR(fpidx), &data,
memcpy(&child->thread.fp_state.fpr, &data,
sizeof(long));
else
child->thread.fpscr.val = data;
child->thread.fp_state.fpscr = data;
ret = 0;
}
break;

11
arch/powerpc/kernel/ptrace32.c
View file

@ -43,7 +43,6 @@
#define FPRNUMBER(i) (((i) - PT_FPR0) >> 1)
#define FPRHALF(i) (((i) - PT_FPR0) & 1)
#define FPRINDEX(i) TS_FPRWIDTH * FPRNUMBER(i) * 2 + FPRHALF(i)
#define FPRINDEX_3264(i) (TS_FPRWIDTH * ((i) - PT_FPR0))
long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
compat_ulong_t caddr, compat_ulong_t cdata)
@ -105,7 +104,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
* to be an array of unsigned int (32 bits) - the
* index passed in is based on this assumption.
*/
tmp = ((unsigned int *)child->thread.fpr)
tmp = ((unsigned int *)child->thread.fp_state.fpr)
[FPRINDEX(index)];
}
ret = put_user((unsigned int)tmp, (u32 __user *)data);
@ -147,8 +146,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
if (numReg >= PT_FPR0) {
flush_fp_to_thread(child);
/* get 64 bit FPR */
tmp = ((u64 *)child->thread.fpr)
[FPRINDEX_3264(numReg)];
tmp = child->thread.fp_state.fpr[numReg - PT_FPR0][0];
} else { /* register within PT_REGS struct */
unsigned long tmp2;
ret = ptrace_get_reg(child, numReg, &tmp2);
@ -207,7 +205,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
* to be an array of unsigned int (32 bits) - the
* index passed in is based on this assumption.
*/
((unsigned int *)child->thread.fpr)
((unsigned int *)child->thread.fp_state.fpr)
[FPRINDEX(index)] = data;
ret = 0;
}
@ -251,8 +249,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
u64 *tmp;
flush_fp_to_thread(child);
/* get 64 bit FPR ... */
tmp = &(((u64 *)child->thread.fpr)
[FPRINDEX_3264(numReg)]);
tmp = &child->thread.fp_state.fpr[numReg - PT_FPR0][0];
/* ... write the 32 bit part we want */
((u32 *)tmp)[index % 2] = data;
ret = 0;

72
arch/powerpc/kernel/signal_32.c
View file

@ -265,27 +265,27 @@ struct rt_sigframe {
unsigned long copy_fpr_to_user(void __user *to,
struct task_struct *task)
{
double buf[ELF_NFPREG];
u64 buf[ELF_NFPREG];
int i;
/* save FPR copy to local buffer then write to the thread_struct */
for (i = 0; i < (ELF_NFPREG - 1) ; i++)
buf[i] = task->thread.TS_FPR(i);
memcpy(&buf[i], &task->thread.fpscr, sizeof(double));
buf[i] = task->thread.fp_state.fpscr;
return __copy_to_user(to, buf, ELF_NFPREG * sizeof(double));
}
unsigned long copy_fpr_from_user(struct task_struct *task,
void __user *from)
{
double buf[ELF_NFPREG];
u64 buf[ELF_NFPREG];
int i;
if (__copy_from_user(buf, from, ELF_NFPREG * sizeof(double)))
return 1;
for (i = 0; i < (ELF_NFPREG - 1) ; i++)
task->thread.TS_FPR(i) = buf[i];
memcpy(&task->thread.fpscr, &buf[i], sizeof(double));
task->thread.fp_state.fpscr = buf[i];
return 0;
}
@ -293,25 +293,25 @@ unsigned long copy_fpr_from_user(struct task_struct *task,
unsigned long copy_vsx_to_user(void __user *to,
struct task_struct *task)
{
double buf[ELF_NVSRHALFREG];
u64 buf[ELF_NVSRHALFREG];
int i;
/* save FPR copy to local buffer then write to the thread_struct */
for (i = 0; i < ELF_NVSRHALFREG; i++)
buf[i] = task->thread.fpr[i][TS_VSRLOWOFFSET];
buf[i] = task->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
return __copy_to_user(to, buf, ELF_NVSRHALFREG * sizeof(double));
}
unsigned long copy_vsx_from_user(struct task_struct *task,
void __user *from)
{
double buf[ELF_NVSRHALFREG];
u64 buf[ELF_NVSRHALFREG];
int i;
if (__copy_from_user(buf, from, ELF_NVSRHALFREG * sizeof(double)))
return 1;
for (i = 0; i < ELF_NVSRHALFREG ; i++)
task->thread.fpr[i][TS_VSRLOWOFFSET] = buf[i];
task->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];
return 0;
}
@ -319,27 +319,27 @@ unsigned long copy_vsx_from_user(struct task_struct *task,
unsigned long copy_transact_fpr_to_user(void __user *to,
struct task_struct *task)
{
double buf[ELF_NFPREG];
u64 buf[ELF_NFPREG];
int i;
/* save FPR copy to local buffer then write to the thread_struct */
for (i = 0; i < (ELF_NFPREG - 1) ; i++)
buf[i] = task->thread.TS_TRANS_FPR(i);
memcpy(&buf[i], &task->thread.transact_fpscr, sizeof(double));
buf[i] = task->thread.transact_fp.fpscr;
return __copy_to_user(to, buf, ELF_NFPREG * sizeof(double));
}
unsigned long copy_transact_fpr_from_user(struct task_struct *task,
void __user *from)
{
double buf[ELF_NFPREG];
u64 buf[ELF_NFPREG];
int i;
if (__copy_from_user(buf, from, ELF_NFPREG * sizeof(double)))
return 1;
for (i = 0; i < (ELF_NFPREG - 1) ; i++)
task->thread.TS_TRANS_FPR(i) = buf[i];
memcpy(&task->thread.transact_fpscr, &buf[i], sizeof(double));
task->thread.transact_fp.fpscr = buf[i];
return 0;
}
@ -347,25 +347,25 @@ unsigned long copy_transact_fpr_from_user(struct task_struct *task,
unsigned long copy_transact_vsx_to_user(void __user *to,
struct task_struct *task)
{
double buf[ELF_NVSRHALFREG];
u64 buf[ELF_NVSRHALFREG];
int i;
/* save FPR copy to local buffer then write to the thread_struct */
for (i = 0; i < ELF_NVSRHALFREG; i++)
buf[i] = task->thread.transact_fpr[i][TS_VSRLOWOFFSET];
buf[i] = task->thread.transact_fp.fpr[i][TS_VSRLOWOFFSET];
return __copy_to_user(to, buf, ELF_NVSRHALFREG * sizeof(double));
}
unsigned long copy_transact_vsx_from_user(struct task_struct *task,
void __user *from)
{
double buf[ELF_NVSRHALFREG];
u64 buf[ELF_NVSRHALFREG];
int i;
if (__copy_from_user(buf, from, ELF_NVSRHALFREG * sizeof(double)))
return 1;
for (i = 0; i < ELF_NVSRHALFREG ; i++)
task->thread.transact_fpr[i][TS_VSRLOWOFFSET] = buf[i];
task->thread.transact_fp.fpr[i][TS_VSRLOWOFFSET] = buf[i];
return 0;
}
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
@ -373,14 +373,14 @@ unsigned long copy_transact_vsx_from_user(struct task_struct *task,
inline unsigned long copy_fpr_to_user(void __user *to,
struct task_struct *task)
{
return __copy_to_user(to, task->thread.fpr,
return __copy_to_user(to, task->thread.fp_state.fpr,
ELF_NFPREG * sizeof(double));
}
inline unsigned long copy_fpr_from_user(struct task_struct *task,
void __user *from)
{
return __copy_from_user(task->thread.fpr, from,
return __copy_from_user(task->thread.fp_state.fpr, from,
ELF_NFPREG * sizeof(double));
}
@ -388,14 +388,14 @@ inline unsigned long copy_fpr_from_user(struct task_struct *task,
inline unsigned long copy_transact_fpr_to_user(void __user *to,
struct task_struct *task)
{
return __copy_to_user(to, task->thread.transact_fpr,
return __copy_to_user(to, task->thread.transact_fp.fpr,
ELF_NFPREG * sizeof(double));
}
inline unsigned long copy_transact_fpr_from_user(struct task_struct *task,
void __user *from)
{
return __copy_from_user(task->thread.transact_fpr, from,
return __copy_from_user(task->thread.transact_fp.fpr, from,
ELF_NFPREG * sizeof(double));
}
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
@ -423,7 +423,7 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
/* save altivec registers */
if (current->thread.used_vr) {
flush_altivec_to_thread(current);
if (__copy_to_user(&frame->mc_vregs, current->thread.vr,
if (__copy_to_user(&frame->mc_vregs, &current->thread.vr_state,
ELF_NVRREG * sizeof(vector128)))
return 1;
/* set MSR_VEC in the saved MSR value to indicate that
@ -534,17 +534,17 @@ static int save_tm_user_regs(struct pt_regs *regs,
/* save altivec registers */
if (current->thread.used_vr) {
flush_altivec_to_thread(current);
if (__copy_to_user(&frame->mc_vregs, current->thread.vr,
if (__copy_to_user(&frame->mc_vregs, &current->thread.vr_state,
ELF_NVRREG * sizeof(vector128)))
return 1;
if (msr & MSR_VEC) {
if (__copy_to_user(&tm_frame->mc_vregs,
current->thread.transact_vr,
&current->thread.transact_vr,
ELF_NVRREG * sizeof(vector128)))
return 1;
} else {
if (__copy_to_user(&tm_frame->mc_vregs,
current->thread.vr,
&current->thread.vr_state,
ELF_NVRREG * sizeof(vector128)))
return 1;
}
@ -692,11 +692,12 @@ static long restore_user_regs(struct pt_regs *regs,
regs->msr &= ~MSR_VEC;
if (msr & MSR_VEC) {
/* restore altivec registers from the stack */
if (__copy_from_user(current->thread.vr, &sr->mc_vregs,
if (__copy_from_user(&current->thread.vr_state, &sr->mc_vregs,
sizeof(sr->mc_vregs)))
return 1;
} else if (current->thread.used_vr)
memset(current->thread.vr, 0, ELF_NVRREG * sizeof(vector128));
memset(&current->thread.vr_state, 0,
ELF_NVRREG * sizeof(vector128));
/* Always get VRSAVE back */
if (__get_user(current->thread.vrsave, (u32 __user *)&sr->mc_vregs[32]))
@ -722,7 +723,7 @@ static long restore_user_regs(struct pt_regs *regs,
return 1;
} else if (current->thread.used_vsr)
for (i = 0; i < 32 ; i++)
current->thread.fpr[i][TS_VSRLOWOFFSET] = 0;
current->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
#endif /* CONFIG_VSX */
/*
* force the process to reload the FP registers from
@ -798,15 +799,16 @@ static long restore_tm_user_regs(struct pt_regs *regs,
regs->msr &= ~MSR_VEC;
if (msr & MSR_VEC) {
/* restore altivec registers from the stack */
if (__copy_from_user(current->thread.vr, &sr->mc_vregs,
if (__copy_from_user(&current->thread.vr_state, &sr->mc_vregs,
sizeof(sr->mc_vregs)) ||
__copy_from_user(current->thread.transact_vr,
__copy_from_user(&current->thread.transact_vr,
&tm_sr->mc_vregs,
sizeof(sr->mc_vregs)))
return 1;
} else if (current->thread.used_vr) {
memset(current->thread.vr, 0, ELF_NVRREG * sizeof(vector128));
memset(current->thread.transact_vr, 0,
memset(&current->thread.vr_state, 0,
ELF_NVRREG * sizeof(vector128));
memset(&current->thread.transact_vr, 0,
ELF_NVRREG * sizeof(vector128));
}
@ -838,8 +840,8 @@ static long restore_tm_user_regs(struct pt_regs *regs,
return 1;
} else if (current->thread.used_vsr)
for (i = 0; i < 32 ; i++) {
current->thread.fpr[i][TS_VSRLOWOFFSET] = 0;
current->thread.transact_fpr[i][TS_VSRLOWOFFSET] = 0;
current->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
current->thread.transact_fp.fpr[i][TS_VSRLOWOFFSET] = 0;
}
#endif /* CONFIG_VSX */
@ -1030,7 +1032,7 @@ int handle_rt_signal32(unsigned long sig, struct k_sigaction *ka,
if (__put_user(0, &rt_sf->uc.uc_link))
goto badframe;
current->thread.fpscr.val = 0; /* turn off all fp exceptions */
current->thread.fp_state.fpscr = 0; /* turn off all fp exceptions */
/* create a stack frame for the caller of the handler */
newsp = ((unsigned long)rt_sf) - (__SIGNAL_FRAMESIZE + 16);
@ -1463,7 +1465,7 @@ int handle_signal32(unsigned long sig, struct k_sigaction *ka,
regs->link = tramp;
current->thread.fpscr.val = 0; /* turn off all fp exceptions */
current->thread.fp_state.fpscr = 0; /* turn off all fp exceptions */
/* create a stack frame for the caller of the handler */
newsp = ((unsigned long)frame) - __SIGNAL_FRAMESIZE;

29
arch/powerpc/kernel/signal_64.c
View file

@ -103,7 +103,8 @@ static long setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
if (current->thread.used_vr) {
flush_altivec_to_thread(current);
/* Copy 33 vec registers (vr0..31 and vscr) to the stack */
err |= __copy_to_user(v_regs, current->thread.vr, 33 * sizeof(vector128));
err |= __copy_to_user(v_regs, &current->thread.vr_state,
33 * sizeof(vector128));
/* set MSR_VEC in the MSR value in the frame to indicate that sc->v_reg)
* contains valid data.
*/
@ -195,18 +196,18 @@ static long setup_tm_sigcontexts(struct sigcontext __user *sc,
if (current->thread.used_vr) {
flush_altivec_to_thread(current);
/* Copy 33 vec registers (vr0..31 and vscr) to the stack */
err |= __copy_to_user(v_regs, current->thread.vr,
err |= __copy_to_user(v_regs, &current->thread.vr_state,
33 * sizeof(vector128));
/* If VEC was enabled there are transactional VRs valid too,
* else they're a copy of the checkpointed VRs.
*/
if (msr & MSR_VEC)
err |= __copy_to_user(tm_v_regs,
current->thread.transact_vr,
&current->thread.transact_vr,
33 * sizeof(vector128));
else
err |= __copy_to_user(tm_v_regs,
current->thread.vr,
&current->thread.vr_state,
33 * sizeof(vector128));
/* set MSR_VEC in the MSR value in the frame to indicate
@ -349,10 +350,10 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig,
return -EFAULT;
/* Copy 33 vec registers (vr0..31 and vscr) from the stack */
if (v_regs != NULL && (msr & MSR_VEC) != 0)
err |= __copy_from_user(current->thread.vr, v_regs,
err |= __copy_from_user(&current->thread.vr_state, v_regs,
33 * sizeof(vector128));
else if (current->thread.used_vr)
memset(current->thread.vr, 0, 33 * sizeof(vector128));
memset(&current->thread.vr_state, 0, 33 * sizeof(vector128));
/* Always get VRSAVE back */
if (v_regs != NULL)
err |= __get_user(current->thread.vrsave, (u32 __user *)&v_regs[33]);
@ -374,7 +375,7 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig,
err |= copy_vsx_from_user(current, v_regs);
else
for (i = 0; i < 32 ; i++)
current->thread.fpr[i][TS_VSRLOWOFFSET] = 0;
current->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
#endif
return err;
}
@ -468,14 +469,14 @@ static long restore_tm_sigcontexts(struct pt_regs *regs,
return -EFAULT;
/* Copy 33 vec registers (vr0..31 and vscr) from the stack */
if (v_regs != NULL && tm_v_regs != NULL && (msr & MSR_VEC) != 0) {
err |= __copy_from_user(current->thread.vr, v_regs,
err |= __copy_from_user(&current->thread.vr_state, v_regs,
33 * sizeof(vector128));
err |= __copy_from_user(current->thread.transact_vr, tm_v_regs,
err |= __copy_from_user(&current->thread.transact_vr, tm_v_regs,
33 * sizeof(vector128));
}
else if (current->thread.used_vr) {
memset(current->thread.vr, 0, 33 * sizeof(vector128));
memset(current->thread.transact_vr, 0, 33 * sizeof(vector128));
memset(&current->thread.vr_state, 0, 33 * sizeof(vector128));
memset(&current->thread.transact_vr, 0, 33 * sizeof(vector128));
}
/* Always get VRSAVE back */
if (v_regs != NULL && tm_v_regs != NULL) {
@ -507,8 +508,8 @@ static long restore_tm_sigcontexts(struct pt_regs *regs,
err |= copy_transact_vsx_from_user(current, tm_v_regs);
} else {
for (i = 0; i < 32 ; i++) {
current->thread.fpr[i][TS_VSRLOWOFFSET] = 0;
current->thread.transact_fpr[i][TS_VSRLOWOFFSET] = 0;
current->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
current->thread.transact_fp.fpr[i][TS_VSRLOWOFFSET] = 0;
}
}
#endif
@ -747,7 +748,7 @@ int handle_rt_signal64(int signr, struct k_sigaction *ka, siginfo_t *info,
goto badframe;
/* Make sure signal handler doesn't get spurious FP exceptions */
current->thread.fpscr.val = 0;
current->thread.fp_state.fpscr = 0;
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
/* Remove TM bits from thread's MSR. The MSR in the sigcontext
* just indicates to userland that we were doing a transaction, but we

41
arch/powerpc/kernel/tm.S
View file

@ -12,16 +12,15 @@
#include <asm/reg.h>
#ifdef CONFIG_VSX
/* See fpu.S, this is very similar but to save/restore checkpointed FPRs/VSRs */
#define __SAVE_32FPRS_VSRS_TRANSACT(n,c,base) \
/* See fpu.S, this is borrowed from there */
#define __SAVE_32FPRS_VSRS(n,c,base) \
BEGIN_FTR_SECTION \
b 2f; \
END_FTR_SECTION_IFSET(CPU_FTR_VSX); \
SAVE_32FPRS_TRANSACT(n,base); \
SAVE_32FPRS(n,base); \
b 3f; \
2: SAVE_32VSRS_TRANSACT(n,c,base); \
2: SAVE_32VSRS(n,c,base); \
3:
/* ...and this is just plain borrowed from there. */
#define __REST_32FPRS_VSRS(n,c,base) \
BEGIN_FTR_SECTION \
b 2f; \
@ -31,11 +30,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX); \
2: REST_32VSRS(n,c,base); \
3:
#else
#define __SAVE_32FPRS_VSRS_TRANSACT(n,c,base) SAVE_32FPRS_TRANSACT(n, base)
#define __REST_32FPRS_VSRS(n,c,base) REST_32FPRS(n, base)
#define __SAVE_32FPRS_VSRS(n,c,base) SAVE_32FPRS(n, base)
#define __REST_32FPRS_VSRS(n,c,base) REST_32FPRS(n, base)
#endif
#define SAVE_32FPRS_VSRS_TRANSACT(n,c,base) \
__SAVE_32FPRS_VSRS_TRANSACT(n,__REG_##c,__REG_##base)
#define SAVE_32FPRS_VSRS(n,c,base) \
__SAVE_32FPRS_VSRS(n,__REG_##c,__REG_##base)
#define REST_32FPRS_VSRS(n,c,base) \
__REST_32FPRS_VSRS(n,__REG_##c,__REG_##base)
@ -157,10 +156,11 @@ _GLOBAL(tm_reclaim)
andis. r0, r4, MSR_VEC@h
beq dont_backup_vec
SAVE_32VRS_TRANSACT(0, r6, r3) /* r6 scratch, r3 thread */
addi r7, r3, THREAD_TRANSACT_VRSTATE
SAVE_32VRS(0, r6, r7) /* r6 scratch, r7 transact vr state */
mfvscr vr0
li r6, THREAD_TRANSACT_VSCR
stvx vr0, r3, r6
li r6, VRSTATE_VSCR
stvx vr0, r7, r6
dont_backup_vec:
mfspr r0, SPRN_VRSAVE
std r0, THREAD_TRANSACT_VRSAVE(r3)
@ -168,10 +168,11 @@ dont_backup_vec:
andi. r0, r4, MSR_FP
beq dont_backup_fp
SAVE_32FPRS_VSRS_TRANSACT(0, R6, R3) /* r6 scratch, r3 thread */
addi r7, r3, THREAD_TRANSACT_FPSTATE
SAVE_32FPRS_VSRS(0, R6, R7) /* r6 scratch, r7 transact fp state */
mffs fr0
stfd fr0,THREAD_TRANSACT_FPSCR(r3)
stfd fr0,FPSTATE_FPSCR(r7)
dont_backup_fp:
/* The moment we treclaim, ALL of our GPRs will switch
@ -358,10 +359,11 @@ _GLOBAL(tm_recheckpoint)
andis. r0, r4, MSR_VEC@h
beq dont_restore_vec
li r5, THREAD_VSCR
lvx vr0, r3, r5
addi r8, r3, THREAD_VRSTATE
li r5, VRSTATE_VSCR
lvx vr0, r8, r5
mtvscr vr0
REST_32VRS(0, r5, r3) /* r5 scratch, r3 THREAD ptr */
REST_32VRS(0, r5, r8) /* r5 scratch, r8 ptr */
dont_restore_vec:
ld r5, THREAD_VRSAVE(r3)
mtspr SPRN_VRSAVE, r5
@ -370,9 +372,10 @@ dont_restore_vec:
andi. r0, r4, MSR_FP
beq dont_restore_fp
lfd fr0, THREAD_FPSCR(r3)
addi r8, r3, THREAD_FPSTATE
lfd fr0, FPSTATE_FPSCR(r8)
MTFSF_L(fr0)
REST_32FPRS_VSRS(0, R4, R3)
REST_32FPRS_VSRS(0, R4, R8)
dont_restore_fp:
mtmsr r6 /* FP/Vec off again! */

10
arch/powerpc/kernel/traps.c
View file

@ -816,7 +816,7 @@ static void parse_fpe(struct pt_regs *regs)
flush_fp_to_thread(current);
code = __parse_fpscr(current->thread.fpscr.val);
code = __parse_fpscr(current->thread.fp_state.fpscr);
_exception(SIGFPE, regs, code, regs->nip);
}
@ -1069,7 +1069,7 @@ static int emulate_math(struct pt_regs *regs)
return 0;
case 1: {
int code = 0;
code = __parse_fpscr(current->thread.fpscr.val);
code = __parse_fpscr(current->thread.fp_state.fpscr);
_exception(SIGFPE, regs, code, regs->nip);
return 0;
}
@ -1371,8 +1371,6 @@ void facility_unavailable_exception(struct pt_regs *regs)
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
extern void do_load_up_fpu(struct pt_regs *regs);
void fp_unavailable_tm(struct pt_regs *regs)
{
/* Note: This does not handle any kind of FP laziness. */
@ -1403,8 +1401,6 @@ void fp_unavailable_tm(struct pt_regs *regs)
}
#ifdef CONFIG_ALTIVEC
extern void do_load_up_altivec(struct pt_regs *regs);
void altivec_unavailable_tm(struct pt_regs *regs)
{
/* See the comments in fp_unavailable_tm(). This function operates
@ -1634,7 +1630,7 @@ void altivec_assist_exception(struct pt_regs *regs)
/* XXX quick hack for now: set the non-Java bit in the VSCR */
printk_ratelimited(KERN_ERR "Unrecognized altivec instruction "
"in %s at %lx\n", current->comm, regs->nip);
current->thread.vscr.u[3] |= 0x10000;
current->thread.vr_state.vscr.u[3] |= 0x10000;
}
}
#endif /* CONFIG_ALTIVEC */

6
arch/powerpc/kernel/vecemu.c
View file

@ -271,7 +271,7 @@ int emulate_altivec(struct pt_regs *regs)
vb = (instr >> 11) & 0x1f;
vc = (instr >> 6) & 0x1f;
vrs = current->thread.vr;
vrs = current->thread.vr_state.vr;
switch (instr & 0x3f) {
case 10:
switch (vc) {
@ -320,12 +320,12 @@ int emulate_altivec(struct pt_regs *regs)
case 14: /* vctuxs */
for (i = 0; i < 4; ++i)
vrs[vd].u[i] = ctuxs(vrs[vb].u[i], va,
&current->thread.vscr.u[3]);
&current->thread.vr_state.vscr.u[3]);
break;
case 15: /* vctsxs */
for (i = 0; i < 4; ++i)
vrs[vd].u[i] = ctsxs(vrs[vb].u[i], va,
&current->thread.vscr.u[3]);
&current->thread.vr_state.vscr.u[3]);
break;
default:
return -EINVAL;

77
arch/powerpc/kernel/vector.S
View file

@ -8,29 +8,6 @@
#include <asm/ptrace.h>
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
/*
* Wrapper to call load_up_altivec from C.
* void do_load_up_altivec(struct pt_regs *regs);
*/
_GLOBAL(do_load_up_altivec)
mflr r0
std r0, 16(r1)
stdu r1, -112(r1)
subi r6, r3, STACK_FRAME_OVERHEAD
/* load_up_altivec expects r12=MSR, r13=PACA, and returns
* with r12 = new MSR.
*/
ld r12,_MSR(r6)
GET_PACA(r13)
bl load_up_altivec
std r12,_MSR(r6)
ld r0, 112+16(r1)
addi r1, r1, 112
mtlr r0
blr
/* void do_load_up_transact_altivec(struct thread_struct *thread)
*
* This is similar to load_up_altivec but for the transactional version of the
@ -46,10 +23,11 @@ _GLOBAL(do_load_up_transact_altivec)
li r4,1
stw r4,THREAD_USED_VR(r3)
li r10,THREAD_TRANSACT_VSCR
li r10,THREAD_TRANSACT_VRSTATE+VRSTATE_VSCR
lvx vr0,r10,r3
mtvscr vr0
REST_32VRS_TRANSACT(0,r4,r3)
addi r10,r3,THREAD_TRANSACT_VRSTATE
REST_32VRS(0,r4,r10)
/* Disable VEC again. */
MTMSRD(r6)
@ -59,7 +37,28 @@ _GLOBAL(do_load_up_transact_altivec)
#endif
/*
* load_up_altivec(unused, unused, tsk)
* Load state from memory into VMX registers including VSCR.
* Assumes the caller has enabled VMX in the MSR.
*/
_GLOBAL(load_vr_state)
li r4,VRSTATE_VSCR
lvx vr0,r4,r3
mtvscr vr0
REST_32VRS(0,r4,r3)
blr
/*
* Store VMX state into memory, including VSCR.
* Assumes the caller has enabled VMX in the MSR.
*/
_GLOBAL(store_vr_state)
SAVE_32VRS(0, r4, r3)
mfvscr vr0
li r4, VRSTATE_VSCR
stvx vr0, r4, r3
blr
/*
* Disable VMX for the task which had it previously,
* and save its vector registers in its thread_struct.
* Enables the VMX for use in the kernel on return.
@ -90,10 +89,11 @@ _GLOBAL(load_up_altivec)
/* Save VMX state to last_task_used_altivec's THREAD struct */
toreal(r4)
addi r4,r4,THREAD
SAVE_32VRS(0,r5,r4)
addi r7,r4,THREAD_VRSTATE
SAVE_32VRS(0,r5,r7)
mfvscr vr0
li r10,THREAD_VSCR
stvx vr0,r10,r4
li r10,VRSTATE_VSCR
stvx vr0,r10,r7
/* Disable VMX for last_task_used_altivec */
PPC_LL r5,PT_REGS(r4)
toreal(r5)
@ -125,12 +125,13 @@ _GLOBAL(load_up_altivec)
oris r12,r12,MSR_VEC@h
std r12,_MSR(r1)
#endif
addi r7,r5,THREAD_VRSTATE
li r4,1
li r10,THREAD_VSCR
li r10,VRSTATE_VSCR
stw r4,THREAD_USED_VR(r5)
lvx vr0,r10,r5
lvx vr0,r10,r7
mtvscr vr0
REST_32VRS(0,r4,r5)
REST_32VRS(0,r4,r7)
#ifndef CONFIG_SMP
/* Update last_task_used_altivec to 'current' */
subi r4,r5,THREAD /* Back to 'current' */
@ -165,12 +166,16 @@ _GLOBAL(giveup_altivec)
PPC_LCMPI 0,r3,0
beqlr /* if no previous owner, done */
addi r3,r3,THREAD /* want THREAD of task */
PPC_LL r7,THREAD_VRSAVEAREA(r3)
PPC_LL r5,PT_REGS(r3)
PPC_LCMPI 0,r5,0
SAVE_32VRS(0,r4,r3)
PPC_LCMPI 0,r7,0
bne 2f
addi r7,r3,THREAD_VRSTATE
2: PPC_LCMPI 0,r5,0
SAVE_32VRS(0,r4,r7)
mfvscr vr0
li r4,THREAD_VSCR
stvx vr0,r4,r3
li r4,VRSTATE_VSCR
stvx vr0,r4,r7
beq 1f
PPC_LL r4,_MSR-STACK_FRAME_OVERHEAD(r5)
#ifdef CONFIG_VSX

36
arch/powerpc/kvm/book3s_pr.c
View file

@ -444,7 +444,7 @@ void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
#ifdef CONFIG_VSX
u64 *vcpu_vsx = vcpu->arch.vsr;
#endif
u64 *thread_fpr = (u64*)t->fpr;
u64 *thread_fpr = &t->fp_state.fpr[0][0];
int i;
/*
@ -466,14 +466,14 @@ void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
/*
* Note that on CPUs with VSX, giveup_fpu stores
* both the traditional FP registers and the added VSX
* registers into thread.fpr[].
* registers into thread.fp_state.fpr[].
*/
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)];
vcpu->arch.fpscr = t->fpscr.val;
vcpu->arch.fpscr = t->fp_state.fpscr;
#ifdef CONFIG_VSX
if (cpu_has_feature(CPU_FTR_VSX))
@ -486,8 +486,8 @@ void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
if (msr & MSR_VEC) {
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;
memcpy(vcpu->arch.vr, t->vr_state.vr, sizeof(vcpu->arch.vr));
vcpu->arch.vscr = t->vr_state.vscr;
}
#endif
@ -539,7 +539,7 @@ static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
#ifdef CONFIG_VSX
u64 *vcpu_vsx = vcpu->arch.vsr;
#endif
u64 *thread_fpr = (u64*)t->fpr;
u64 *thread_fpr = &t->fp_state.fpr[0][0];
int i;
/* When we have paired singles, we emulate in software */
@ -584,15 +584,15 @@ static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr) / 2; i++)
thread_fpr[get_fpr_index(i) + 1] = vcpu_vsx[i];
#endif
t->fpscr.val = vcpu->arch.fpscr;
t->fp_state.fpscr = vcpu->arch.fpscr;
t->fpexc_mode = 0;
kvmppc_load_up_fpu();
}
if (msr & MSR_VEC) {
#ifdef CONFIG_ALTIVEC
memcpy(t->vr, vcpu->arch.vr, sizeof(vcpu->arch.vr));
t->vscr = vcpu->arch.vscr;
memcpy(t->vr_state.vr, vcpu->arch.vr, sizeof(vcpu->arch.vr));
t->vr_state.vscr = vcpu->arch.vscr;
t->vrsave = -1;
kvmppc_load_up_altivec();
#endif
@ -1116,12 +1116,10 @@ void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
{
int ret;
double fpr[32][TS_FPRWIDTH];
unsigned int fpscr;
struct thread_fp_state fp;
int fpexc_mode;
#ifdef CONFIG_ALTIVEC
vector128 vr[32];
vector128 vscr;
struct thread_vr_state vr;
unsigned long uninitialized_var(vrsave);
int used_vr;
#endif
@ -1153,8 +1151,7 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
/* Save FPU state in stack */
if (current->thread.regs->msr & MSR_FP)
giveup_fpu(current);
memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
fpscr = current->thread.fpscr.val;
fp = current->thread.fp_state;
fpexc_mode = current->thread.fpexc_mode;
#ifdef CONFIG_ALTIVEC
@ -1163,8 +1160,7 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
if (used_vr) {
if (current->thread.regs->msr & MSR_VEC)
giveup_altivec(current);
memcpy(vr, current->thread.vr, sizeof(current->thread.vr));
vscr = current->thread.vscr;
vr = current->thread.vr_state;
vrsave = current->thread.vrsave;
}
#endif
@ -1196,15 +1192,13 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
current->thread.regs->msr = ext_msr;
/* Restore FPU/VSX state from stack */
memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
current->thread.fpscr.val = fpscr;
current->thread.fp_state = fp;
current->thread.fpexc_mode = fpexc_mode;
#ifdef CONFIG_ALTIVEC
/* Restore Altivec state from stack */
if (used_vr && current->thread.used_vr) {
memcpy(current->thread.vr, vr, sizeof(current->thread.vr));
current->thread.vscr = vscr;
current->thread.vr_state = vr;
current->thread.vrsave = vrsave;
}
current->thread.used_vr = used_vr;

19
arch/powerpc/kvm/booke.c
View file

@ -656,9 +656,8 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
{
int ret, s;
#ifdef CONFIG_PPC_FPU
unsigned int fpscr;
struct thread_fp_state fp;
int fpexc_mode;
u64 fpr[32];
#endif
if (!vcpu->arch.sane) {
@ -677,13 +676,13 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
#ifdef CONFIG_PPC_FPU
/* Save userspace FPU state in stack */
enable_kernel_fp();
memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
fpscr = current->thread.fpscr.val;
fp = current->thread.fp_state;
fpexc_mode = current->thread.fpexc_mode;
/* Restore guest FPU state to thread */
memcpy(current->thread.fpr, vcpu->arch.fpr, sizeof(vcpu->arch.fpr));
current->thread.fpscr.val = vcpu->arch.fpscr;
memcpy(current->thread.fp_state.fpr, vcpu->arch.fpr,
sizeof(vcpu->arch.fpr));
current->thread.fp_state.fpscr = vcpu->arch.fpscr;
/*
* Since we can't trap on MSR_FP in GS-mode, we consider the guest
@ -709,12 +708,12 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
vcpu->fpu_active = 0;
/* Save guest FPU state from thread */
memcpy(vcpu->arch.fpr, current->thread.fpr, sizeof(vcpu->arch.fpr));
vcpu->arch.fpscr = current->thread.fpscr.val;
memcpy(vcpu->arch.fpr, current->thread.fp_state.fpr,
sizeof(vcpu->arch.fpr));
vcpu->arch.fpscr = current->thread.fp_state.fpscr;
/* Restore userspace FPU state from stack */
memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
current->thread.fpscr.val = fpscr;
current->thread.fp_state = fp;
current->thread.fpexc_mode = fpexc_mode;
#endif

51
arch/powerpc/mm/init_64.c
View file

@ -304,5 +304,54 @@ void register_page_bootmem_memmap(unsigned long section_nr,
struct page *start_page, unsigned long size)
{
}
#endif /* CONFIG_SPARSEMEM_VMEMMAP */
/*
* We do not have access to the sparsemem vmemmap, so we fallback to
* walking the list of sparsemem blocks which we already maintain for
* the sake of crashdump. In the long run, we might want to maintain
* a tree if performance of that linear walk becomes a problem.
*
* realmode_pfn_to_page functions can fail due to:
* 1) As real sparsemem blocks do not lay in RAM continously (they
* are in virtual address space which is not available in the real mode),
* the requested page struct can be split between blocks so get_page/put_page
* may fail.
* 2) When huge pages are used, the get_page/put_page API will fail
* in real mode as the linked addresses in the page struct are virtual
* too.
*/
struct page *realmode_pfn_to_page(unsigned long pfn)
{
struct vmemmap_backing *vmem_back;
struct page *page;
unsigned long page_size = 1 << mmu_psize_defs[mmu_vmemmap_psize].shift;
unsigned long pg_va = (unsigned long) pfn_to_page(pfn);
for (vmem_back = vmemmap_list; vmem_back; vmem_back = vmem_back->list) {
if (pg_va < vmem_back->virt_addr)
continue;
/* Check that page struct is not split between real pages */
if ((pg_va + sizeof(struct page)) >
(vmem_back->virt_addr + page_size))
return NULL;
page = (struct page *) (vmem_back->phys + pg_va -
vmem_back->virt_addr);
return page;
}
return NULL;
}
EXPORT_SYMBOL_GPL(realmode_pfn_to_page);
#elif defined(CONFIG_FLATMEM)
struct page *realmode_pfn_to_page(unsigned long pfn)
{
struct page *page = pfn_to_page(pfn);
return page;
}
EXPORT_SYMBOL_GPL(realmode_pfn_to_page);
#endif /* CONFIG_SPARSEMEM_VMEMMAP/CONFIG_FLATMEM */

49
arch/powerpc/platforms/powernv/pci-ioda.c
View file

@ -70,6 +70,16 @@ define_pe_printk_level(pe_err, KERN_ERR);
define_pe_printk_level(pe_warn, KERN_WARNING);
define_pe_printk_level(pe_info, KERN_INFO);
/*
* stdcix is only supposed to be used in hypervisor real mode as per
* the architecture spec
*/
static inline void __raw_rm_writeq(u64 val, volatile void __iomem *paddr)
{
__asm__ __volatile__("stdcix %0,0,%1"
: : "r" (val), "r" (paddr) : "memory");
}
static int pnv_ioda_alloc_pe(struct pnv_phb *phb)
{
unsigned long pe;
@ -454,10 +464,13 @@ static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, struct pci_bus *bus)
}
}
static void pnv_pci_ioda1_tce_invalidate(struct iommu_table *tbl,
__be64 *startp, __be64 *endp)
static void pnv_pci_ioda1_tce_invalidate(struct pnv_ioda_pe *pe,
struct iommu_table *tbl,
__be64 *startp, __be64 *endp, bool rm)
{
__be64 __iomem *invalidate = (__be64 __iomem *)tbl->it_index;
__be64 __iomem *invalidate = rm ?
(__be64 __iomem *)pe->tce_inval_reg_phys :
(__be64 __iomem *)tbl->it_index;
unsigned long start, end, inc;
start = __pa(startp);
@ -484,7 +497,10 @@ static void pnv_pci_ioda1_tce_invalidate(struct iommu_table *tbl,
mb(); /* Ensure above stores are visible */
while (start <= end) {
__raw_writeq(cpu_to_be64(start), invalidate);
if (rm)
__raw_rm_writeq(cpu_to_be64(start), invalidate);
else
__raw_writeq(cpu_to_be64(start), invalidate);
start += inc;
}
@ -496,10 +512,12 @@ static void pnv_pci_ioda1_tce_invalidate(struct iommu_table *tbl,
static void pnv_pci_ioda2_tce_invalidate(struct pnv_ioda_pe *pe,
struct iommu_table *tbl,
__be64 *startp, __be64 *endp)
__be64 *startp, __be64 *endp, bool rm)
{
unsigned long start, end, inc;
__be64 __iomem *invalidate = (__be64 __iomem *)tbl->it_index;
__be64 __iomem *invalidate = rm ?
(__be64 __iomem *)pe->tce_inval_reg_phys :
(__be64 __iomem *)tbl->it_index;
/* We'll invalidate DMA address in PE scope */
start = 0x2ul << 60;
@ -515,22 +533,25 @@ static void pnv_pci_ioda2_tce_invalidate(struct pnv_ioda_pe *pe,
mb();
while (start <= end) {
__raw_writeq(cpu_to_be64(start), invalidate);
if (rm)
__raw_rm_writeq(cpu_to_be64(start), invalidate);
else
__raw_writeq(cpu_to_be64(start), invalidate);
start += inc;
}
}
void pnv_pci_ioda_tce_invalidate(struct iommu_table *tbl,
__be64 *startp, __be64 *endp)
__be64 *startp, __be64 *endp, bool rm)
{
struct pnv_ioda_pe *pe = container_of(tbl, struct pnv_ioda_pe,
tce32_table);
struct pnv_phb *phb = pe->phb;
if (phb->type == PNV_PHB_IODA1)
pnv_pci_ioda1_tce_invalidate(tbl, startp, endp);
pnv_pci_ioda1_tce_invalidate(pe, tbl, startp, endp, rm);
else
pnv_pci_ioda2_tce_invalidate(pe, tbl, startp, endp);
pnv_pci_ioda2_tce_invalidate(pe, tbl, startp, endp, rm);
}
static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
@ -603,7 +624,9 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
* bus number, print that out instead.
*/
tbl->it_busno = 0;
tbl->it_index = (unsigned long)ioremap(be64_to_cpup(swinvp), 8);
pe->tce_inval_reg_phys = be64_to_cpup(swinvp);
tbl->it_index = (unsigned long)ioremap(pe->tce_inval_reg_phys,
8);
tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE |
TCE_PCI_SWINV_PAIR;
}
@ -681,7 +704,9 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
* bus number, print that out instead.
*/
tbl->it_busno = 0;
tbl->it_index = (unsigned long)ioremap(be64_to_cpup(swinvp), 8);
pe->tce_inval_reg_phys = be64_to_cpup(swinvp);
tbl->it_index = (unsigned long)ioremap(pe->tce_inval_reg_phys,
8);
tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE;
}
iommu_init_table(tbl, phb->hose->node);

42
arch/powerpc/platforms/powernv/pci.c
View file

@ -401,7 +401,7 @@ struct pci_ops pnv_pci_ops = {
static int pnv_tce_build(struct iommu_table *tbl, long index, long npages,
unsigned long uaddr, enum dma_data_direction direction,
struct dma_attrs *attrs)
struct dma_attrs *attrs, bool rm)
{
u64 proto_tce;
__be64 *tcep, *tces;
@ -423,12 +423,22 @@ static int pnv_tce_build(struct iommu_table *tbl, long index, long npages,
* of flags if that becomes the case
*/
if (tbl->it_type & TCE_PCI_SWINV_CREATE)
pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1);
pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1, rm);
return 0;
}
static void pnv_tce_free(struct iommu_table *tbl, long index, long npages)
static int pnv_tce_build_vm(struct iommu_table *tbl, long index, long npages,
unsigned long uaddr,
enum dma_data_direction direction,
struct dma_attrs *attrs)
{
return pnv_tce_build(tbl, index, npages, uaddr, direction, attrs,
false);
}
static void pnv_tce_free(struct iommu_table *tbl, long index, long npages,
bool rm)
{
__be64 *tcep, *tces;
@ -438,7 +448,12 @@ static void pnv_tce_free(struct iommu_table *tbl, long index, long npages)
*(tcep++) = cpu_to_be64(0);
if (tbl->it_type & TCE_PCI_SWINV_FREE)
pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1);
pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1, rm);
}
static void pnv_tce_free_vm(struct iommu_table *tbl, long index, long npages)
{
pnv_tce_free(tbl, index, npages, false);
}
static unsigned long pnv_tce_get(struct iommu_table *tbl, long index)
@ -446,6 +461,19 @@ static unsigned long pnv_tce_get(struct iommu_table *tbl, long index)
return ((u64 *)tbl->it_base)[index - tbl->it_offset];
}
static int pnv_tce_build_rm(struct iommu_table *tbl, long index, long npages,
unsigned long uaddr,
enum dma_data_direction direction,
struct dma_attrs *attrs)
{
return pnv_tce_build(tbl, index, npages, uaddr, direction, attrs, true);
}
static void pnv_tce_free_rm(struct iommu_table *tbl, long index, long npages)
{
pnv_tce_free(tbl, index, npages, true);
}
void pnv_pci_setup_iommu_table(struct iommu_table *tbl,
void *tce_mem, u64 tce_size,
u64 dma_offset)
@ -610,8 +638,10 @@ void __init pnv_pci_init(void)
/* Configure IOMMU DMA hooks */
ppc_md.pci_dma_dev_setup = pnv_pci_dma_dev_setup;
ppc_md.tce_build = pnv_tce_build;
ppc_md.tce_free = pnv_tce_free;
ppc_md.tce_build = pnv_tce_build_vm;
ppc_md.tce_free = pnv_tce_free_vm;
ppc_md.tce_build_rm = pnv_tce_build_rm;
ppc_md.tce_free_rm = pnv_tce_free_rm;
ppc_md.tce_get = pnv_tce_get;
ppc_md.pci_probe_mode = pnv_pci_probe_mode;
set_pci_dma_ops(&dma_iommu_ops);

3
arch/powerpc/platforms/powernv/pci.h
View file

@ -52,6 +52,7 @@ struct pnv_ioda_pe {
int tce32_seg;
int tce32_segcount;
struct iommu_table tce32_table;
phys_addr_t tce_inval_reg_phys;
/* XXX TODO: Add support for additional 64-bit iommus */
@ -193,6 +194,6 @@ extern void pnv_pci_init_p5ioc2_hub(struct device_node *np);
extern void pnv_pci_init_ioda_hub(struct device_node *np);
extern void pnv_pci_init_ioda2_phb(struct device_node *np);
extern void pnv_pci_ioda_tce_invalidate(struct iommu_table *tbl,
__be64 *startp, __be64 *endp);
__be64 *startp, __be64 *endp, bool rm);
#endif /* __POWERNV_PCI_H */

15
include/linux/hashtable.h
View file

@ -173,6 +173,21 @@ static inline void hash_del_rcu(struct hlist_node *node)
hlist_for_each_entry_rcu(obj, &name[hash_min(key, HASH_BITS(name))],\
member)
/**
* hash_for_each_possible_rcu_notrace - iterate over all possible objects hashing
* to the same bucket in an rcu enabled hashtable in a rcu enabled hashtable
* @name: hashtable to iterate
* @obj: the type * to use as a loop cursor for each entry
* @member: the name of the hlist_node within the struct
* @key: the key of the objects to iterate over
*
* This is the same as hash_for_each_possible_rcu() except that it does
* not do any RCU debugging or tracing.
*/
#define hash_for_each_possible_rcu_notrace(name, obj, member, key) \
hlist_for_each_entry_rcu_notrace(obj, \
&name[hash_min(key, HASH_BITS(name))], member)
/**
* hash_for_each_possible_safe - iterate over all possible objects hashing to the
* same bucket safe against removals

14
include/linux/mm.h
View file

@ -297,12 +297,26 @@ static inline int put_page_testzero(struct page *page)
/*
* Try to grab a ref unless the page has a refcount of zero, return false if
* that is the case.
* This can be called when MMU is off so it must not access
* any of the virtual mappings.
*/
static inline int get_page_unless_zero(struct page *page)
{
return atomic_inc_not_zero(&page->_count);
}
/*
* Try to drop a ref unless the page has a refcount of one, return false if
* that is the case.
* This is to make sure that the refcount won't become zero after this drop.
* This can be called when MMU is off so it must not access
* any of the virtual mappings.
*/
static inline int put_page_unless_one(struct page *page)
{
return atomic_add_unless(&page->_count, -1, 1);
}
extern int page_is_ram(unsigned long pfn);
/* Support for virtually mapped pages */

4
include/linux/page-flags.h
View file

@ -329,7 +329,9 @@ static inline void set_page_writeback(struct page *page)
* System with lots of page flags available. This allows separate
* flags for PageHead() and PageTail() checks of compound pages so that bit
* tests can be used in performance sensitive paths. PageCompound is
* generally not used in hot code paths.
* generally not used in hot code paths except arch/powerpc/mm/init_64.c
* and arch/powerpc/kvm/book3s_64_vio_hv.c which use it to detect huge pages
* and avoid handling those in real mode.
*/
__PAGEFLAG(Head, head) CLEARPAGEFLAG(Head, head)
__PAGEFLAG(Tail, tail)