From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: x86@kernel.org, linux-arch@vger.kernel.org,
Will Deacon <will@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Mark Rutland <mark.rutland@arm.com>,
Kees Cook <keescook@chromium.org>,
Keno Fischer <keno@juliacomputing.com>,
Paolo Bonzini <pbonzini@redhat.com>,
kvm@vger.kernel.org,
Gabriel Krisman Bertazi <krisman@collabora.com>,
Sean Christopherson <sean.j.christopherson@intel.com>
Subject: [patch V5 09/15] x86/ptrace: Provide pt_regs helper for entry/exit
Date: Thu, 23 Jul 2020 00:00:03 +0200 [thread overview]
Message-ID: <20200722220520.258511584@linutronix.de> (raw)
In-Reply-To: 20200722215954.464281930@linutronix.de
From: Thomas Gleixner <tglx@linutronix.de>
As a preparatory step for moving the syscall and interrupt entry/exit
handling into generic code, provide a pt_regs helper which retrieves the
interrupt state from pt_regs. This is required to check whether interrupts
are reenabled by return from interrupt/exception.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
---
V4: Remove the syscall nr and return value helpers as they alredy exist
---
arch/x86/include/asm/ptrace.h | 5 +++++
1 file changed, 5 insertions(+)
--- a/arch/x86/include/asm/ptrace.h
+++ b/arch/x86/include/asm/ptrace.h
@@ -209,6 +209,11 @@ static inline void user_stack_pointer_se
regs->sp = val;
}
+static __always_inline bool regs_irqs_disabled(struct pt_regs *regs)
+{
+ return !(regs->flags & X86_EFLAGS_IF);
+}
+
/* Query offset/name of register from its name/offset */
extern int regs_query_register_offset(const char *name);
extern const char *regs_query_register_name(unsigned int offset);
next prev parent reply other threads:[~2020-07-22 22:11 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-22 21:59 [patch V5 00/15] entry, x86, kvm: Generic entry/exit functionality for host and guest Thomas Gleixner
2020-07-22 21:59 ` Thomas Gleixner
2020-07-22 21:59 ` [patch V5 01/15] seccomp: Provide stub for __secure_computing() Thomas Gleixner
2020-07-22 21:59 ` Thomas Gleixner
2020-07-22 21:59 ` [patch V5 02/15] entry: Provide generic syscall entry functionality Thomas Gleixner
2020-07-22 21:59 ` Thomas Gleixner
2020-07-22 21:59 ` [patch V5 03/15] entry: Provide generic syscall exit function Thomas Gleixner
2020-07-22 21:59 ` [patch V5 04/15] entry: Provide generic interrupt entry/exit code Thomas Gleixner
2020-07-22 21:59 ` Thomas Gleixner
2020-07-22 21:59 ` [patch V5 05/15] entry: Provide infrastructure for work before transitioning to guest mode Thomas Gleixner
2020-07-29 16:55 ` Qian Cai
2020-07-29 16:55 ` Qian Cai
2020-07-30 7:19 ` Thomas Gleixner
2020-07-22 22:00 ` [patch V5 06/15] x86/entry: Consolidate check_user_regs() Thomas Gleixner
2020-07-22 22:00 ` Thomas Gleixner
2020-07-22 22:00 ` [patch V5 07/15] x86/entry: Consolidate 32/64 bit syscall entry Thomas Gleixner
2020-07-22 22:00 ` [patch V5 08/15] x86/entry: Move user return notifier out of loop Thomas Gleixner
2020-07-23 23:41 ` Sean Christopherson
2020-07-22 22:00 ` Thomas Gleixner [this message]
2020-07-22 22:00 ` [patch V5 10/15] x86/entry: Use generic syscall entry function Thomas Gleixner
2020-07-22 22:00 ` Thomas Gleixner
2020-07-22 22:00 ` [patch V5 11/15] x86/entry: Use generic syscall exit functionality Thomas Gleixner
2020-07-22 22:00 ` Thomas Gleixner
2020-07-22 22:00 ` [patch V5 12/15] x86/entry: Cleanup idtentry_entry/exit_user Thomas Gleixner
2020-07-22 22:00 ` Thomas Gleixner
2020-07-22 22:00 ` [patch V5 13/15] x86/entry: Use generic interrupt entry/exit code Thomas Gleixner
2020-07-22 22:00 ` Thomas Gleixner
2020-07-24 14:28 ` Ingo Molnar
2020-07-22 22:00 ` [patch V5 14/15] x86/entry: Cleanup idtentry_enter/exit Thomas Gleixner
2020-07-22 22:00 ` [patch V5 15/15] x86/kvm: Use generic xfer to guest work function Thomas Gleixner
2020-07-24 0:17 ` Sean Christopherson
2020-07-24 0:46 ` Thomas Gleixner
2020-07-24 0:55 ` Sean Christopherson
2020-07-24 14:24 ` Ingo Molnar
2020-07-24 19:08 ` Thomas Gleixner
2020-07-24 20:51 ` [patch V5 00/15] entry, x86, kvm: Generic entry/exit functionality for host and guest Thomas Gleixner
2020-07-24 20:51 ` Thomas Gleixner
2020-07-29 13:39 ` Steven Price
2020-07-29 13:39 ` Steven Price
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