linux-kernel - [patch V2 13/14] x86/fpu: Rename xstate copy functions which are related to UABI

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Date:   Sun, 06 Jun 2021 01:47:55 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Tony Luck <tony.luck@...el.com>,
        Yu-cheng Yu <yu-cheng.yu@...el.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [patch V2 13/14] x86/fpu: Rename xstate copy functions which are
 related to UABI

Rename them to reflect that these functions deal with user space format
XSAVE buffers.

Suggested-by: Andy Lutomirski <luto@...nel.org>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
V2: New patch
---
 arch/x86/include/asm/fpu/xstate.h |    6 +++---
 arch/x86/kernel/fpu/regset.c      |    4 ++--
 arch/x86/kernel/fpu/signal.c      |    2 +-
 arch/x86/kernel/fpu/xstate.c      |    7 ++++---
 4 files changed, 10 insertions(+), 9 deletions(-)

--- a/arch/x86/include/asm/fpu/xstate.h
+++ b/arch/x86/include/asm/fpu/xstate.h
@@ -105,9 +105,9 @@ const void *get_xsave_field_ptr(int xfea
 int using_compacted_format(void);
 int xfeature_size(int xfeature_nr);
 struct membuf;
-void copy_xstate_to_kernel(struct membuf to, struct xregs_state *xsave);
-int copy_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf);
-int copy_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf);
+void copy_uabi_xstate_to_kernel(struct membuf to, struct xregs_state *xsave);
+int copy_uabi_from_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf);
+int copy_uabi_from_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf);
 void copy_supervisor_to_kernel(struct xregs_state *xsave);
 void copy_dynamic_supervisor_to_kernel(struct xregs_state *xstate, u64 mask);
 void copy_kernel_to_dynamic_supervisor(struct xregs_state *xstate, u64 mask);
--- a/arch/x86/kernel/fpu/regset.c
+++ b/arch/x86/kernel/fpu/regset.c
@@ -89,7 +89,7 @@ int xstateregs_get(struct task_struct *t
 	fpu__prepare_read(fpu);
 
 	if (using_compacted_format()) {
-		copy_xstate_to_kernel(to, xsave);
+		copy_uabi_xstate_to_kernel(to, xsave);
 		return 0;
 	} else {
 		fpstate_sanitize_xstate(fpu);
@@ -135,7 +135,7 @@ int xstateregs_set(struct task_struct *t
 	}
 
 	fpu__prepare_write(fpu);
-	ret = copy_kernel_to_xstate(&fpu->state.xsave, kbuf ?: tmpbuf);
+	ret = copy_uabi_from_kernel_to_xstate(&fpu->state.xsave, kbuf ?: tmpbuf);
 
 out:
 	vfree(tmpbuf);
--- a/arch/x86/kernel/fpu/signal.c
+++ b/arch/x86/kernel/fpu/signal.c
@@ -426,7 +426,7 @@ static int __fpu__restore_sig(void __use
 	if (use_xsave() && !fx_only) {
 		u64 init_bv = xfeatures_mask_user() & ~user_xfeatures;
 
-		ret = copy_user_to_xstate(&fpu->state.xsave, buf_fx);
+		ret = copy_uabi_from_user_to_xstate(&fpu->state.xsave, buf_fx);
 		if (ret)
 			goto err_out;
 
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -1072,7 +1072,7 @@ static void copy_part(struct membuf *to,
  * It supports partial copy but pos always starts from zero. This is called
  * from xstateregs_get() and there we check the CPU has XSAVES.
  */
-void copy_xstate_to_kernel(struct membuf to, struct xregs_state *xsave)
+void copy_uabi_xstate_to_kernel(struct membuf to, struct xregs_state *xsave)
 {
 	struct xstate_header header;
 	const unsigned off_mxcsr = offsetof(struct fxregs_state, mxcsr);
@@ -1128,7 +1128,7 @@ void copy_xstate_to_kernel(struct membuf
  * Convert from a ptrace standard-format kernel buffer to kernel XSAVES format
  * and copy to the target thread. This is called from xstateregs_set().
  */
-int copy_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf)
+int copy_uabi_from_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf)
 {
 	unsigned int offset, size;
 	int i;
@@ -1183,7 +1183,8 @@ int copy_kernel_to_xstate(struct xregs_s
  * XSAVES format and copy to the target thread. This is called from the
  * sigreturn() and rt_sigreturn() system calls.
  */
-int copy_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf)
+int copy_uabi_from_user_to_xstate(struct xregs_state *xsave,
+				  const void __user *ubuf)
 {
 	unsigned int offset, size;
 	int i;