From: Alexander Shishkin <alexander.shishkin@linux.intel.com>
To: Andy Lutomirski <luto@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Ard Biesheuvel <ardb@kernel.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Xiongwei Song <xiongwei.song@windriver.com>,
Xin Li <xin3.li@intel.com>,
"Mike Rapoport (IBM)" <rppt@kernel.org>,
Brijesh Singh <brijesh.singh@amd.com>,
Michael Roth <michael.roth@amd.com>,
Tony Luck <tony.luck@intel.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Alexey Kardashevskiy <aik@amd.com>
Cc: Jonathan Corbet <corbet@lwn.net>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Sohil Mehta <sohil.mehta@intel.com>,
Ingo Molnar <mingo@kernel.org>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Daniel Sneddon <daniel.sneddon@linux.intel.com>,
Kai Huang <kai.huang@intel.com>,
Sandipan Das <sandipan.das@amd.com>,
Breno Leitao <leitao@debian.org>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
Alexei Starovoitov <ast@kernel.org>, Hou Tao <houtao1@huawei.com>,
Juergen Gross <jgross@suse.com>,
Vegard Nossum <vegard.nossum@oracle.com>,
Kees Cook <kees@kernel.org>, Eric Biggers <ebiggers@google.com>,
Jason Gunthorpe <jgg@ziepe.ca>,
"Masami Hiramatsu (Google)" <mhiramat@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Luis Chamberlain <mcgrof@kernel.org>,
Yuntao Wang <ytcoode@gmail.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Tejun Heo <tj@kernel.org>, Changbin Du <changbin.du@huawei.com>,
Huang Shijie <shijie@os.amperecomputing.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Namhyung Kim <namhyung@kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-efi@vger.kernel.org, Dave Hansen <dave.hansen@intel.com>
Subject: [PATCH v5 08/16] x86/traps: Consolidate user fixups in exc_general_protection()
Date: Mon, 28 Oct 2024 18:07:56 +0200 [thread overview]
Message-ID: <20241028160917.1380714-9-alexander.shishkin@linux.intel.com> (raw)
In-Reply-To: <20241028160917.1380714-1-alexander.shishkin@linux.intel.com>
From: Sohil Mehta <sohil.mehta@intel.com>
Move the UMIP exception fixup along with the other user mode fixups,
that is, under the common "if (user_mode(regs))" condition where the
rest of the fixups reside.
No functional change intended.
Suggested-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Sohil Mehta <sohil.mehta@intel.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
---
arch/x86/kernel/traps.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index d05392db5d0f..b26a7aba0b2d 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -701,11 +701,6 @@ DEFINE_IDTENTRY_ERRORCODE(exc_general_protection)
cond_local_irq_enable(regs);
- if (static_cpu_has(X86_FEATURE_UMIP)) {
- if (user_mode(regs) && fixup_umip_exception(regs))
- goto exit;
- }
-
if (v8086_mode(regs)) {
local_irq_enable();
handle_vm86_fault((struct kernel_vm86_regs *) regs, error_code);
@@ -720,6 +715,9 @@ DEFINE_IDTENTRY_ERRORCODE(exc_general_protection)
if (fixup_vdso_exception(regs, X86_TRAP_GP, error_code, 0))
goto exit;
+ if (cpu_feature_enabled(X86_FEATURE_UMIP) && fixup_umip_exception(regs))
+ goto exit;
+
gp_user_force_sig_segv(regs, X86_TRAP_GP, error_code, desc);
goto exit;
}
--
2.45.2
next prev parent reply other threads:[~2024-10-28 16:11 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-28 16:07 [PATCH v5 00/16] Enable Linear Address Space Separation support Alexander Shishkin
2024-10-28 16:07 ` [PATCH v5 01/16] x86/cpu: Enumerate the LASS feature bits Alexander Shishkin
2024-10-29 14:55 ` Kirill A. Shutemov
2024-10-29 21:46 ` Sohil Mehta
2024-10-28 16:07 ` [PATCH v5 02/16] x86/asm: Introduce inline memcpy and memset Alexander Shishkin
2024-10-28 16:07 ` [PATCH v5 03/16] x86/alternatives: Disable LASS when patching kernel alternatives Alexander Shishkin
2024-10-28 17:49 ` Dave Hansen
2024-10-29 11:36 ` Peter Zijlstra
2024-10-29 18:48 ` Peter Zijlstra
2024-10-30 7:40 ` Alexander Shishkin
2024-10-28 16:07 ` [PATCH v5 04/16] init/main.c: Move EFI runtime service initialization to x86/cpu Alexander Shishkin
2024-10-29 22:35 ` Sohil Mehta
2024-10-30 7:36 ` Ard Biesheuvel
2024-10-28 16:07 ` [PATCH v5 05/16] x86/cpu: Defer CR pinning setup until after EFI initialization Alexander Shishkin
2024-10-29 22:10 ` Sohil Mehta
2024-10-29 22:26 ` Luck, Tony
2024-10-29 22:52 ` Dave Hansen
2024-10-29 22:59 ` Luck, Tony
2024-10-29 23:02 ` H. Peter Anvin
2024-10-29 23:03 ` Dave Hansen
2024-10-29 23:05 ` H. Peter Anvin
2024-10-29 23:18 ` Luck, Tony
2024-10-29 23:41 ` H. Peter Anvin
2024-10-30 11:43 ` Kirill A. Shutemov
2024-10-28 16:07 ` [PATCH v5 06/16] efi: Disable LASS around set_virtual_address_map call Alexander Shishkin
2024-10-29 15:00 ` Kirill A. Shutemov
2024-10-28 16:07 ` [PATCH v5 07/16] x86/vsyscall: Reorganize the #PF emulation code Alexander Shishkin
2024-10-28 16:07 ` Alexander Shishkin [this message]
2024-10-28 16:07 ` [PATCH v5 09/16] x86/vsyscall: Add vsyscall emulation for #GP Alexander Shishkin
2024-10-28 16:07 ` [PATCH v5 10/16] x86/vsyscall: Disable LASS if vsyscall mode is set to EMULATE Alexander Shishkin
2024-10-28 16:07 ` [PATCH v5 11/16] x86/vsyscall: Document the fact that vsyscall=emulate disables LASS Alexander Shishkin
2024-10-29 23:41 ` Sohil Mehta
2024-10-28 16:08 ` [PATCH v5 12/16] x86/cpu: Set LASS CR4 bit as pinning sensitive Alexander Shishkin
2024-10-28 16:08 ` [PATCH v5 13/16] x86/traps: Communicate a LASS violation in #GP message Alexander Shishkin
2024-10-28 16:08 ` [PATCH v5 14/16] x86/cpu: Make LAM depend on LASS Alexander Shishkin
2024-10-31 0:06 ` Sohil Mehta
2024-10-28 16:08 ` [PATCH v5 15/16] x86/cpu: Enable LASS during CPU initialization Alexander Shishkin
2024-10-28 16:08 ` [PATCH v5 16/16] Revert "x86/lam: Disable ADDRESS_MASKING in most cases" Alexander Shishkin
2024-10-28 20:41 ` Kirill A. Shutemov
2024-10-28 22:00 ` Alexander Shishkin
2024-10-29 17:14 ` [PATCH v5 00/16] Enable Linear Address Space Separation support Matthew Wilcox
2024-10-30 7:16 ` Alexander Shishkin
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