Re: [PATCH 1/3] x86/sev-es: Introduce from_syscall_gap() helper
From: Borislav Petkov <bp@alien8.de>
Date: 2021-02-17 18:00:42
Also in:
kvm, lkml, stable
I guess subject prefix should be "x86/traps:" but I'll fix that up while applying eventually. On Wed, Feb 17, 2021 at 01:01:41PM +0100, Joerg Roedel wrote:
quoted hunk ↗ jump to hunk
From: Joerg Roedel <redacted> Introduce a helper to check whether an exception came from the syscall gap and use it in the SEV-ES code Fixes: 315562c9af3d5 ("x86/sev-es: Adjust #VC IST Stack on entering NMI handler") Cc: stable@vger.kernel.org # 5.10+ Signed-off-by: Joerg Roedel <redacted> --- arch/x86/include/asm/ptrace.h | 8 ++++++++ arch/x86/kernel/traps.c | 3 +-- 2 files changed, 9 insertions(+), 2 deletions(-)diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h index d8324a236696..14854b2c4944 100644 --- a/arch/x86/include/asm/ptrace.h +++ b/arch/x86/include/asm/ptrace.h@@ -94,6 +94,8 @@ struct pt_regs { #include <asm/paravirt_types.h> #endif +#include <asm/proto.h> + struct cpuinfo_x86; struct task_struct;@@ -175,6 +177,12 @@ static inline bool any_64bit_mode(struct pt_regs *regs) #ifdef CONFIG_X86_64 #define current_user_stack_pointer() current_pt_regs()->sp #define compat_user_stack_pointer() current_pt_regs()->sp + +static inline bool from_syscall_gap(struct pt_regs *regs)
rip_within_syscall_gap() sounds kinda better to me and it is more
readable when you look at it at the usage site:
if (rip_within_syscall_gap(regs))
...
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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