From 3a54450b5ed1671a6adecf501a0b4d4c1d27235d Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Fri, 24 Apr 2015 10:14:36 +0200 Subject: [PATCH] x86/fpu: Rename 'xsave_hdr' to 'header' Code like: fpu->state->xsave.xsave_hdr.xstate_bv |= XSTATE_FP; is an eyesore, because not only is the words 'xsave' and 'state' are repeated twice times (!), but also because of the 'hdr' and 'bv' abbreviations that are pretty meaningless at a first glance. Start cleaning this up by renaming 'xsave_hdr' to 'header'. Reviewed-by: Borislav Petkov Cc: Andy Lutomirski Cc: Dave Hansen Cc: Fenghua Yu Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/x86/include/asm/fpu/internal.h | 2 +- arch/x86/include/asm/fpu/types.h | 4 ++-- arch/x86/include/asm/fpu/xsave.h | 2 +- arch/x86/include/asm/user.h | 10 +++++----- arch/x86/include/uapi/asm/sigcontext.h | 4 ++-- arch/x86/kernel/fpu/core.c | 8 ++++---- arch/x86/kernel/fpu/xsave.c | 22 +++++++++++----------- arch/x86/kvm/x86.c | 8 ++++---- 8 files changed, 30 insertions(+), 30 deletions(-) diff --git a/arch/x86/include/asm/fpu/internal.h b/arch/x86/include/asm/fpu/internal.h index 0e9a7a37801a..3007df99833e 100644 --- a/arch/x86/include/asm/fpu/internal.h +++ b/arch/x86/include/asm/fpu/internal.h @@ -261,7 +261,7 @@ static inline int fpu_save_init(struct fpu *fpu) /* * xsave header may indicate the init state of the FP. */ - if (!(fpu->state->xsave.xsave_hdr.xstate_bv & XSTATE_FP)) + if (!(fpu->state->xsave.header.xstate_bv & XSTATE_FP)) return 1; } else if (use_fxsr()) { fpu_fxsave(fpu); diff --git a/arch/x86/include/asm/fpu/types.h b/arch/x86/include/asm/fpu/types.h index 917d2e56426a..33c0c7b782db 100644 --- a/arch/x86/include/asm/fpu/types.h +++ b/arch/x86/include/asm/fpu/types.h @@ -99,7 +99,7 @@ struct bndcsr { u64 bndstatus; } __packed; -struct xsave_hdr_struct { +struct xstate_header { u64 xstate_bv; u64 xcomp_bv; u64 reserved[6]; @@ -107,7 +107,7 @@ struct xsave_hdr_struct { struct xsave_struct { struct i387_fxsave_struct i387; - struct xsave_hdr_struct xsave_hdr; + struct xstate_header header; struct ymmh_struct ymmh; struct lwp_struct lwp; struct bndreg bndreg[4]; diff --git a/arch/x86/include/asm/fpu/xsave.h b/arch/x86/include/asm/fpu/xsave.h index 400d5b2e42eb..b27b4466f88d 100644 --- a/arch/x86/include/asm/fpu/xsave.h +++ b/arch/x86/include/asm/fpu/xsave.h @@ -212,7 +212,7 @@ static inline int xsave_user(struct xsave_struct __user *buf) * Clear the xsave header first, so that reserved fields are * initialized to zero. */ - err = __clear_user(&buf->xsave_hdr, sizeof(buf->xsave_hdr)); + err = __clear_user(&buf->header, sizeof(buf->header)); if (unlikely(err)) return -EFAULT; diff --git a/arch/x86/include/asm/user.h b/arch/x86/include/asm/user.h index ccab4af1646d..fa042410c42c 100644 --- a/arch/x86/include/asm/user.h +++ b/arch/x86/include/asm/user.h @@ -14,7 +14,7 @@ struct user_ymmh_regs { __u32 ymmh_space[64]; }; -struct user_xsave_hdr { +struct user_xstate_header { __u64 xstate_bv; __u64 reserved1[2]; __u64 reserved2[5]; @@ -41,11 +41,11 @@ struct user_xsave_hdr { * particular process/thread. * * Also when the user modifies certain state FP/SSE/etc through the - * ptrace interface, they must ensure that the xsave_hdr.xstate_bv + * ptrace interface, they must ensure that the header.xstate_bv * bytes[512..519] of the memory layout are updated correspondingly. * i.e., for example when FP state is modified to a non-init state, - * xsave_hdr.xstate_bv's bit 0 must be set to '1', when SSE is modified to - * non-init state, xsave_hdr.xstate_bv's bit 1 must to be set to '1', etc. + * header.xstate_bv's bit 0 must be set to '1', when SSE is modified to + * non-init state, header.xstate_bv's bit 1 must to be set to '1', etc. */ #define USER_XSTATE_FX_SW_WORDS 6 #define USER_XSTATE_XCR0_WORD 0 @@ -55,7 +55,7 @@ struct user_xstateregs { __u64 fpx_space[58]; __u64 xstate_fx_sw[USER_XSTATE_FX_SW_WORDS]; } i387; - struct user_xsave_hdr xsave_hdr; + struct user_xstate_header header; struct user_ymmh_regs ymmh; /* further processor state extensions go here */ }; diff --git a/arch/x86/include/uapi/asm/sigcontext.h b/arch/x86/include/uapi/asm/sigcontext.h index 16dc4e8a2cd3..7f850f7b5c45 100644 --- a/arch/x86/include/uapi/asm/sigcontext.h +++ b/arch/x86/include/uapi/asm/sigcontext.h @@ -209,7 +209,7 @@ struct sigcontext { #endif /* !__i386__ */ -struct _xsave_hdr { +struct _header { __u64 xstate_bv; __u64 reserved1[2]; __u64 reserved2[5]; @@ -228,7 +228,7 @@ struct _ymmh_state { */ struct _xstate { struct _fpstate fpstate; - struct _xsave_hdr xstate_hdr; + struct _header xstate_hdr; struct _ymmh_state ymmh; /* new processor state extensions go here */ }; diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index 07c8a4489e0c..74189f31f1a2 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -470,7 +470,7 @@ int xfpregs_set(struct task_struct *target, const struct user_regset *regset, * presence of FP and SSE state. */ if (cpu_has_xsave) - fpu->state->xsave.xsave_hdr.xstate_bv |= XSTATE_FPSSE; + fpu->state->xsave.header.xstate_bv |= XSTATE_FPSSE; return ret; } @@ -528,11 +528,11 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset, * mxcsr reserved bits must be masked to zero for security reasons. */ xsave->i387.mxcsr &= mxcsr_feature_mask; - xsave->xsave_hdr.xstate_bv &= xfeatures_mask; + xsave->header.xstate_bv &= xfeatures_mask; /* * These bits must be zero. */ - memset(&xsave->xsave_hdr.reserved, 0, 48); + memset(&xsave->header.reserved, 0, 48); return ret; } @@ -740,7 +740,7 @@ int fpregs_set(struct task_struct *target, const struct user_regset *regset, * presence of FP. */ if (cpu_has_xsave) - fpu->state->xsave.xsave_hdr.xstate_bv |= XSTATE_FP; + fpu->state->xsave.header.xstate_bv |= XSTATE_FP; return ret; } diff --git a/arch/x86/kernel/fpu/xsave.c b/arch/x86/kernel/fpu/xsave.c index a485180ebc32..03639fa079b0 100644 --- a/arch/x86/kernel/fpu/xsave.c +++ b/arch/x86/kernel/fpu/xsave.c @@ -32,7 +32,7 @@ static unsigned int xfeatures_nr; /* * If a processor implementation discern that a processor state component is * in its initialized state it may modify the corresponding bit in the - * xsave_hdr.xstate_bv as '0', with out modifying the corresponding memory + * header.xstate_bv as '0', with out modifying the corresponding memory * layout in the case of xsaveopt. While presenting the xstate information to * the user, we always ensure that the memory layout of a feature will be in * the init state if the corresponding header bit is zero. This is to ensure @@ -48,7 +48,7 @@ void __sanitize_i387_state(struct task_struct *tsk) if (!fx) return; - xstate_bv = tsk->thread.fpu.state->xsave.xsave_hdr.xstate_bv; + xstate_bv = tsk->thread.fpu.state->xsave.header.xstate_bv; /* * None of the feature bits are in init state. So nothing else @@ -106,7 +106,7 @@ static inline int check_for_xstate(struct i387_fxsave_struct __user *buf, struct _fpx_sw_bytes *fx_sw) { int min_xstate_size = sizeof(struct i387_fxsave_struct) + - sizeof(struct xsave_hdr_struct); + sizeof(struct xstate_header); unsigned int magic2; if (__copy_from_user(fx_sw, &buf->sw_reserved[0], sizeof(*fx_sw))) @@ -178,7 +178,7 @@ static inline int save_xstate_epilog(void __user *buf, int ia32_frame) * Read the xstate_bv which we copied (directly from the cpu or * from the state in task struct) to the user buffers. */ - err |= __get_user(xstate_bv, (__u32 *)&x->xsave_hdr.xstate_bv); + err |= __get_user(xstate_bv, (__u32 *)&x->header.xstate_bv); /* * For legacy compatible, we always set FP/SSE bits in the bit @@ -193,7 +193,7 @@ static inline int save_xstate_epilog(void __user *buf, int ia32_frame) */ xstate_bv |= XSTATE_FPSSE; - err |= __put_user(xstate_bv, (__u32 *)&x->xsave_hdr.xstate_bv); + err |= __put_user(xstate_bv, (__u32 *)&x->header.xstate_bv); return err; } @@ -280,20 +280,20 @@ sanitize_restored_xstate(struct task_struct *tsk, u64 xstate_bv, int fx_only) { struct xsave_struct *xsave = &tsk->thread.fpu.state->xsave; - struct xsave_hdr_struct *xsave_hdr = &xsave->xsave_hdr; + struct xstate_header *header = &xsave->header; if (use_xsave()) { /* These bits must be zero. */ - memset(xsave_hdr->reserved, 0, 48); + memset(header->reserved, 0, 48); /* * Init the state that is not present in the memory * layout and not enabled by the OS. */ if (fx_only) - xsave_hdr->xstate_bv = XSTATE_FPSSE; + header->xstate_bv = XSTATE_FPSSE; else - xsave_hdr->xstate_bv &= (xfeatures_mask & xstate_bv); + header->xstate_bv &= (xfeatures_mask & xstate_bv); } if (use_fxsr()) { @@ -574,9 +574,9 @@ static void __init setup_init_fpu_buf(void) print_xstate_features(); if (cpu_has_xsaves) { - init_xstate_buf->xsave_hdr.xcomp_bv = + init_xstate_buf->header.xcomp_bv = (u64)1 << 63 | xfeatures_mask; - init_xstate_buf->xsave_hdr.xstate_bv = xfeatures_mask; + init_xstate_buf->header.xstate_bv = xfeatures_mask; } /* diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 91d7f3b1e50c..ac24889c8bc3 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3197,7 +3197,7 @@ static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, static void fill_xsave(u8 *dest, struct kvm_vcpu *vcpu) { struct xsave_struct *xsave = &vcpu->arch.guest_fpu.state->xsave; - u64 xstate_bv = xsave->xsave_hdr.xstate_bv; + u64 xstate_bv = xsave->header.xstate_bv; u64 valid; /* @@ -3243,9 +3243,9 @@ static void load_xsave(struct kvm_vcpu *vcpu, u8 *src) memcpy(xsave, src, XSAVE_HDR_OFFSET); /* Set XSTATE_BV and possibly XCOMP_BV. */ - xsave->xsave_hdr.xstate_bv = xstate_bv; + xsave->header.xstate_bv = xstate_bv; if (cpu_has_xsaves) - xsave->xsave_hdr.xcomp_bv = host_xcr0 | XSTATE_COMPACTION_ENABLED; + xsave->header.xcomp_bv = host_xcr0 | XSTATE_COMPACTION_ENABLED; /* * Copy each region from the non-compacted offset to the @@ -7014,7 +7014,7 @@ int fx_init(struct kvm_vcpu *vcpu) fpstate_init(&vcpu->arch.guest_fpu); if (cpu_has_xsaves) - vcpu->arch.guest_fpu.state->xsave.xsave_hdr.xcomp_bv = + vcpu->arch.guest_fpu.state->xsave.header.xcomp_bv = host_xcr0 | XSTATE_COMPACTION_ENABLED; /*