diff options
author | Andreas Schwab <schwab@linux-m68k.org> | 2010-05-31 21:59:13 +0200 |
---|---|---|
committer | Avi Kivity <avi@redhat.com> | 2010-08-01 10:39:24 +0300 |
commit | 49f6be8ea1bd74713c1a48e42db06a3808dfa2cd (patch) | |
tree | 5be35ebab7a049e9358a60b308df981b02f70f21 /arch/powerpc/kvm/book3s_paired_singles.c | |
parent | 5120702e732ed72c7055f511f8dd01de36424569 (diff) | |
download | linux-49f6be8ea1bd74713c1a48e42db06a3808dfa2cd.tar.bz2 |
KVM: PPC: elide struct thread_struct instances from stack
Instead of instantiating a whole thread_struct on the stack use only the
required parts of it.
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Tested-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/powerpc/kvm/book3s_paired_singles.c')
-rw-r--r-- | arch/powerpc/kvm/book3s_paired_singles.c | 94 |
1 files changed, 37 insertions, 57 deletions
diff --git a/arch/powerpc/kvm/book3s_paired_singles.c b/arch/powerpc/kvm/book3s_paired_singles.c index a9f66abafcb3..474f2e24050a 100644 --- a/arch/powerpc/kvm/book3s_paired_singles.c +++ b/arch/powerpc/kvm/book3s_paired_singles.c @@ -159,10 +159,7 @@ static inline void kvmppc_sync_qpr(struct kvm_vcpu *vcpu, int rt) { - struct thread_struct t; - - t.fpscr.val = vcpu->arch.fpscr; - cvt_df((double*)&vcpu->arch.fpr[rt], (float*)&vcpu->arch.qpr[rt], &t); + kvm_cvt_df(&vcpu->arch.fpr[rt], &vcpu->arch.qpr[rt], &vcpu->arch.fpscr); } static void kvmppc_inject_pf(struct kvm_vcpu *vcpu, ulong eaddr, bool is_store) @@ -183,7 +180,6 @@ static int kvmppc_emulate_fpr_load(struct kvm_run *run, struct kvm_vcpu *vcpu, int rs, ulong addr, int ls_type) { int emulated = EMULATE_FAIL; - struct thread_struct t; int r; char tmp[8]; int len = sizeof(u32); @@ -191,8 +187,6 @@ static int kvmppc_emulate_fpr_load(struct kvm_run *run, struct kvm_vcpu *vcpu, if (ls_type == FPU_LS_DOUBLE) len = sizeof(u64); - t.fpscr.val = vcpu->arch.fpscr; - /* read from memory */ r = kvmppc_ld(vcpu, &addr, len, tmp, true); vcpu->arch.paddr_accessed = addr; @@ -210,7 +204,7 @@ static int kvmppc_emulate_fpr_load(struct kvm_run *run, struct kvm_vcpu *vcpu, /* put in registers */ switch (ls_type) { case FPU_LS_SINGLE: - cvt_fd((float*)tmp, (double*)&vcpu->arch.fpr[rs], &t); + kvm_cvt_fd((u32*)tmp, &vcpu->arch.fpr[rs], &vcpu->arch.fpscr); vcpu->arch.qpr[rs] = *((u32*)tmp); break; case FPU_LS_DOUBLE: @@ -229,17 +223,14 @@ static int kvmppc_emulate_fpr_store(struct kvm_run *run, struct kvm_vcpu *vcpu, int rs, ulong addr, int ls_type) { int emulated = EMULATE_FAIL; - struct thread_struct t; int r; char tmp[8]; u64 val; int len; - t.fpscr.val = vcpu->arch.fpscr; - switch (ls_type) { case FPU_LS_SINGLE: - cvt_df((double*)&vcpu->arch.fpr[rs], (float*)tmp, &t); + kvm_cvt_df(&vcpu->arch.fpr[rs], (u32*)tmp, &vcpu->arch.fpscr); val = *((u32*)tmp); len = sizeof(u32); break; @@ -278,13 +269,10 @@ static int kvmppc_emulate_psq_load(struct kvm_run *run, struct kvm_vcpu *vcpu, int rs, ulong addr, bool w, int i) { int emulated = EMULATE_FAIL; - struct thread_struct t; int r; float one = 1.0; u32 tmp[2]; - t.fpscr.val = vcpu->arch.fpscr; - /* read from memory */ if (w) { r = kvmppc_ld(vcpu, &addr, sizeof(u32), tmp, true); @@ -308,7 +296,7 @@ static int kvmppc_emulate_psq_load(struct kvm_run *run, struct kvm_vcpu *vcpu, emulated = EMULATE_DONE; /* put in registers */ - cvt_fd((float*)&tmp[0], (double*)&vcpu->arch.fpr[rs], &t); + kvm_cvt_fd(&tmp[0], &vcpu->arch.fpr[rs], &vcpu->arch.fpscr); vcpu->arch.qpr[rs] = tmp[1]; dprintk(KERN_INFO "KVM: PSQ_LD [0x%x, 0x%x] at 0x%lx (%d)\n", tmp[0], @@ -322,14 +310,11 @@ static int kvmppc_emulate_psq_store(struct kvm_run *run, struct kvm_vcpu *vcpu, int rs, ulong addr, bool w, int i) { int emulated = EMULATE_FAIL; - struct thread_struct t; int r; u32 tmp[2]; int len = w ? sizeof(u32) : sizeof(u64); - t.fpscr.val = vcpu->arch.fpscr; - - cvt_df((double*)&vcpu->arch.fpr[rs], (float*)&tmp[0], &t); + kvm_cvt_df(&vcpu->arch.fpr[rs], &tmp[0], &vcpu->arch.fpscr); tmp[1] = vcpu->arch.qpr[rs]; r = kvmppc_st(vcpu, &addr, len, tmp, true); @@ -517,7 +502,7 @@ static int get_d_signext(u32 inst) static int kvmppc_ps_three_in(struct kvm_vcpu *vcpu, bool rc, int reg_out, int reg_in1, int reg_in2, int reg_in3, int scalar, - void (*func)(struct thread_struct *t, + void (*func)(u64 *fpscr, u32 *dst, u32 *src1, u32 *src2, u32 *src3)) { @@ -526,27 +511,25 @@ static int kvmppc_ps_three_in(struct kvm_vcpu *vcpu, bool rc, u32 ps0_out; u32 ps0_in1, ps0_in2, ps0_in3; u32 ps1_in1, ps1_in2, ps1_in3; - struct thread_struct t; - t.fpscr.val = vcpu->arch.fpscr; /* RC */ WARN_ON(rc); /* PS0 */ - cvt_df((double*)&fpr[reg_in1], (float*)&ps0_in1, &t); - cvt_df((double*)&fpr[reg_in2], (float*)&ps0_in2, &t); - cvt_df((double*)&fpr[reg_in3], (float*)&ps0_in3, &t); + kvm_cvt_df(&fpr[reg_in1], &ps0_in1, &vcpu->arch.fpscr); + kvm_cvt_df(&fpr[reg_in2], &ps0_in2, &vcpu->arch.fpscr); + kvm_cvt_df(&fpr[reg_in3], &ps0_in3, &vcpu->arch.fpscr); if (scalar & SCALAR_LOW) ps0_in2 = qpr[reg_in2]; - func(&t, &ps0_out, &ps0_in1, &ps0_in2, &ps0_in3); + func(&vcpu->arch.fpscr, &ps0_out, &ps0_in1, &ps0_in2, &ps0_in3); dprintk(KERN_INFO "PS3 ps0 -> f(0x%x, 0x%x, 0x%x) = 0x%x\n", ps0_in1, ps0_in2, ps0_in3, ps0_out); if (!(scalar & SCALAR_NO_PS0)) - cvt_fd((float*)&ps0_out, (double*)&fpr[reg_out], &t); + kvm_cvt_fd(&ps0_out, &fpr[reg_out], &vcpu->arch.fpscr); /* PS1 */ ps1_in1 = qpr[reg_in1]; @@ -557,7 +540,7 @@ static int kvmppc_ps_three_in(struct kvm_vcpu *vcpu, bool rc, ps1_in2 = ps0_in2; if (!(scalar & SCALAR_NO_PS1)) - func(&t, &qpr[reg_out], &ps1_in1, &ps1_in2, &ps1_in3); + func(&vcpu->arch.fpscr, &qpr[reg_out], &ps1_in1, &ps1_in2, &ps1_in3); dprintk(KERN_INFO "PS3 ps1 -> f(0x%x, 0x%x, 0x%x) = 0x%x\n", ps1_in1, ps1_in2, ps1_in3, qpr[reg_out]); @@ -568,7 +551,7 @@ static int kvmppc_ps_three_in(struct kvm_vcpu *vcpu, bool rc, static int kvmppc_ps_two_in(struct kvm_vcpu *vcpu, bool rc, int reg_out, int reg_in1, int reg_in2, int scalar, - void (*func)(struct thread_struct *t, + void (*func)(u64 *fpscr, u32 *dst, u32 *src1, u32 *src2)) { @@ -578,27 +561,25 @@ static int kvmppc_ps_two_in(struct kvm_vcpu *vcpu, bool rc, u32 ps0_in1, ps0_in2; u32 ps1_out; u32 ps1_in1, ps1_in2; - struct thread_struct t; - t.fpscr.val = vcpu->arch.fpscr; /* RC */ WARN_ON(rc); /* PS0 */ - cvt_df((double*)&fpr[reg_in1], (float*)&ps0_in1, &t); + kvm_cvt_df(&fpr[reg_in1], &ps0_in1, &vcpu->arch.fpscr); if (scalar & SCALAR_LOW) ps0_in2 = qpr[reg_in2]; else - cvt_df((double*)&fpr[reg_in2], (float*)&ps0_in2, &t); + kvm_cvt_df(&fpr[reg_in2], &ps0_in2, &vcpu->arch.fpscr); - func(&t, &ps0_out, &ps0_in1, &ps0_in2); + func(&vcpu->arch.fpscr, &ps0_out, &ps0_in1, &ps0_in2); if (!(scalar & SCALAR_NO_PS0)) { dprintk(KERN_INFO "PS2 ps0 -> f(0x%x, 0x%x) = 0x%x\n", ps0_in1, ps0_in2, ps0_out); - cvt_fd((float*)&ps0_out, (double*)&fpr[reg_out], &t); + kvm_cvt_fd(&ps0_out, &fpr[reg_out], &vcpu->arch.fpscr); } /* PS1 */ @@ -608,7 +589,7 @@ static int kvmppc_ps_two_in(struct kvm_vcpu *vcpu, bool rc, if (scalar & SCALAR_HIGH) ps1_in2 = ps0_in2; - func(&t, &ps1_out, &ps1_in1, &ps1_in2); + func(&vcpu->arch.fpscr, &ps1_out, &ps1_in1, &ps1_in2); if (!(scalar & SCALAR_NO_PS1)) { qpr[reg_out] = ps1_out; @@ -622,31 +603,29 @@ static int kvmppc_ps_two_in(struct kvm_vcpu *vcpu, bool rc, static int kvmppc_ps_one_in(struct kvm_vcpu *vcpu, bool rc, int reg_out, int reg_in, - void (*func)(struct thread_struct *t, + void (*func)(u64 *t, u32 *dst, u32 *src1)) { u32 *qpr = vcpu->arch.qpr; u64 *fpr = vcpu->arch.fpr; u32 ps0_out, ps0_in; u32 ps1_in; - struct thread_struct t; - t.fpscr.val = vcpu->arch.fpscr; /* RC */ WARN_ON(rc); /* PS0 */ - cvt_df((double*)&fpr[reg_in], (float*)&ps0_in, &t); - func(&t, &ps0_out, &ps0_in); + kvm_cvt_df(&fpr[reg_in], &ps0_in, &vcpu->arch.fpscr); + func(&vcpu->arch.fpscr, &ps0_out, &ps0_in); dprintk(KERN_INFO "PS1 ps0 -> f(0x%x) = 0x%x\n", ps0_in, ps0_out); - cvt_fd((float*)&ps0_out, (double*)&fpr[reg_out], &t); + kvm_cvt_fd(&ps0_out, &fpr[reg_out], &vcpu->arch.fpscr); /* PS1 */ ps1_in = qpr[reg_in]; - func(&t, &qpr[reg_out], &ps1_in); + func(&vcpu->arch.fpscr, &qpr[reg_out], &ps1_in); dprintk(KERN_INFO "PS1 ps1 -> f(0x%x) = 0x%x\n", ps1_in, qpr[reg_out]); @@ -672,13 +651,10 @@ int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu) bool rcomp = (inst & 1) ? true : false; u32 cr = kvmppc_get_cr(vcpu); - struct thread_struct t; #ifdef DEBUG int i; #endif - t.fpscr.val = vcpu->arch.fpscr; - if (!kvmppc_inst_is_paired_single(vcpu, inst)) return EMULATE_FAIL; @@ -695,7 +671,7 @@ int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu) #ifdef DEBUG for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++) { u32 f; - cvt_df((double*)&vcpu->arch.fpr[i], (float*)&f, &t); + kvm_cvt_df(&vcpu->arch.fpr[i], &f, &vcpu->arch.fpscr); dprintk(KERN_INFO "FPR[%d] = 0x%x / 0x%llx QPR[%d] = 0x%x\n", i, f, vcpu->arch.fpr[i], i, vcpu->arch.qpr[i]); } @@ -819,8 +795,9 @@ int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu) WARN_ON(rcomp); vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_ra]; /* vcpu->arch.qpr[ax_rd] = vcpu->arch.fpr[ax_rb]; */ - cvt_df((double*)&vcpu->arch.fpr[ax_rb], - (float*)&vcpu->arch.qpr[ax_rd], &t); + kvm_cvt_df(&vcpu->arch.fpr[ax_rb], + &vcpu->arch.qpr[ax_rd], + &vcpu->arch.fpscr); break; case OP_4X_PS_MERGE01: WARN_ON(rcomp); @@ -830,17 +807,20 @@ int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu) case OP_4X_PS_MERGE10: WARN_ON(rcomp); /* vcpu->arch.fpr[ax_rd] = vcpu->arch.qpr[ax_ra]; */ - cvt_fd((float*)&vcpu->arch.qpr[ax_ra], - (double*)&vcpu->arch.fpr[ax_rd], &t); + kvm_cvt_fd(&vcpu->arch.qpr[ax_ra], + &vcpu->arch.fpr[ax_rd], + &vcpu->arch.fpscr); /* vcpu->arch.qpr[ax_rd] = vcpu->arch.fpr[ax_rb]; */ - cvt_df((double*)&vcpu->arch.fpr[ax_rb], - (float*)&vcpu->arch.qpr[ax_rd], &t); + kvm_cvt_df(&vcpu->arch.fpr[ax_rb], + &vcpu->arch.qpr[ax_rd], + &vcpu->arch.fpscr); break; case OP_4X_PS_MERGE11: WARN_ON(rcomp); /* vcpu->arch.fpr[ax_rd] = vcpu->arch.qpr[ax_ra]; */ - cvt_fd((float*)&vcpu->arch.qpr[ax_ra], - (double*)&vcpu->arch.fpr[ax_rd], &t); + kvm_cvt_fd(&vcpu->arch.qpr[ax_ra], + &vcpu->arch.fpr[ax_rd], + &vcpu->arch.fpscr); vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rb]; break; } @@ -1275,7 +1255,7 @@ int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu) #ifdef DEBUG for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++) { u32 f; - cvt_df((double*)&vcpu->arch.fpr[i], (float*)&f, &t); + kvm_cvt_df(&vcpu->arch.fpr[i], &f, &vcpu->arch.fpscr); dprintk(KERN_INFO "FPR[%d] = 0x%x\n", i, f); } #endif |