From: "tip-bot2 for Thomas Gleixner" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@suse.de>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [tip: x86/fpu] x86/fpu: Use fpstate::size
Date: Thu, 21 Oct 2021 15:12:27 -0000 [thread overview]
Message-ID: <163482914796.25758.6331180410187095503.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20211013145322.973518954@linutronix.de>
The following commit has been merged into the x86/fpu branch of tip:
Commit-ID: be31dfdfd75b172af3ddcfa7511cdc3bb7adb25e
Gitweb: https://git.kernel.org/tip/be31dfdfd75b172af3ddcfa7511cdc3bb7adb25e
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Wed, 13 Oct 2021 16:55:48 +02:00
Committer: Borislav Petkov <bp@suse.de>
CommitterDate: Thu, 21 Oct 2021 14:02:25 +02:00
x86/fpu: Use fpstate::size
Make use of fpstate::size in various places which require the buffer size
information for sanity checks or memcpy() sizing.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20211013145322.973518954@linutronix.de
---
arch/x86/kernel/fpu/core.c | 13 ++++++-------
arch/x86/kernel/fpu/signal.c | 7 +++----
2 files changed, 9 insertions(+), 11 deletions(-)
diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
index a8cc20e..cb48c80 100644
--- a/arch/x86/kernel/fpu/core.c
+++ b/arch/x86/kernel/fpu/core.c
@@ -166,13 +166,12 @@ void fpu_swap_kvm_fpu(struct fpu *save, struct fpu *rstor, u64 restore_mask)
fpregs_lock();
if (save) {
- if (test_thread_flag(TIF_NEED_FPU_LOAD)) {
- memcpy(&save->fpstate->regs,
- ¤t->thread.fpu.fpstate->regs,
- fpu_kernel_xstate_size);
- } else {
+ struct fpstate *fpcur = current->thread.fpu.fpstate;
+
+ if (test_thread_flag(TIF_NEED_FPU_LOAD))
+ memcpy(&save->fpstate->regs, &fpcur->regs, fpcur->size);
+ else
save_fpregs_to_fpstate(save);
- }
}
if (rstor) {
@@ -398,7 +397,7 @@ int fpu_clone(struct task_struct *dst)
fpregs_lock();
if (test_thread_flag(TIF_NEED_FPU_LOAD)) {
memcpy(&dst_fpu->fpstate->regs, &src_fpu->fpstate->regs,
- fpu_kernel_xstate_size);
+ dst_fpu->fpstate->size);
} else {
save_fpregs_to_fpstate(dst_fpu);
}
diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c
index c54c2a3..aa93291 100644
--- a/arch/x86/kernel/fpu/signal.c
+++ b/arch/x86/kernel/fpu/signal.c
@@ -313,15 +313,13 @@ retry:
static bool __fpu_restore_sig(void __user *buf, void __user *buf_fx,
bool ia32_fxstate)
{
- int state_size = fpu_kernel_xstate_size;
struct task_struct *tsk = current;
struct fpu *fpu = &tsk->thread.fpu;
struct user_i387_ia32_struct env;
+ bool success, fx_only = false;
union fpregs_state *fpregs;
+ unsigned int state_size;
u64 user_xfeatures = 0;
- bool fx_only = false;
- bool success;
-
if (use_xsave()) {
struct _fpx_sw_bytes fx_sw_user;
@@ -334,6 +332,7 @@ static bool __fpu_restore_sig(void __user *buf, void __user *buf_fx,
user_xfeatures = fx_sw_user.xfeatures;
} else {
user_xfeatures = XFEATURE_MASK_FPSSE;
+ state_size = fpu->fpstate->size;
}
if (likely(!ia32_fxstate)) {
next prev parent reply other threads:[~2021-10-21 15:12 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-13 14:55 [patch 00/21] x86/fpu: Move register state into a container struct (part 2) Thomas Gleixner
2021-10-13 14:55 ` [patch 01/21] x86/fpu: Provide struct fpstate Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 02/21] x86/fpu: Convert fpstate_init() to " Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 03/21] x86/fpu: Convert restore_fpregs_from_fpstate() " Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 04/21] x86/fpu: Replace KVMs xstate component clearing Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 05/21] x86/KVM: Convert to fpstate Thomas Gleixner
2021-10-13 15:11 ` Paolo Bonzini
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 06/21] x86/fpu: Convert tracing " Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 07/21] x86/fpu/regset: Convert " Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 08/21] x86/fpu/signal: " Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 09/21] x86/fpu/core: " Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 10/21] x86/math-emu: " Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 11/21] x86/fpu: Remove fpu::state Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 12/21] x86/fpu: Do not leak fpstate pointer on fork Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 13/21] x86/process: Move arch_thread_struct_whitelist() out of line Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 14/21] x86/fpu: Add size and mask information to fpstate Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 15/21] x86/fpu: Use fpstate::size Thomas Gleixner
2021-10-21 15:12 ` tip-bot2 for Thomas Gleixner [this message]
2021-10-13 14:55 ` [patch 16/21] x86/fpu/xstate: Use fpstate for os_xsave() Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 17/21] x86/fpu/xstate: Use fpstate for xsave_to_user_sigframe() Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 18/21] x86/fpu: Use fpstate in fpu_copy_kvm_uabi_to_fpstate() Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 19/21] x86/fpu: Use fpstate in __copy_xstate_to_uabi_buf() Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 20/21] x86/fpu/xstate: Use fpstate for copy_uabi_to_xstate() Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-13 14:55 ` [patch 21/21] x86/fpu/signal: Use fpstate for size and features Thomas Gleixner
2021-10-14 22:51 ` [patch V2 " Thomas Gleixner
2021-10-21 15:12 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=163482914796.25758.6331180410187095503.tip-bot2@tip-bot2 \
--to=tip-bot2@linutronix.de \
--cc=bp@suse.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-tip-commits@vger.kernel.org \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).