From: Peter Zijlstra <peterz@infradead.org>
To: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
Borislav Petkov <bp@alien8.de>,
Lai Jiangshan <jiangshan.ljs@antgroup.com>,
Andy Lutomirski <luto@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Joerg Roedel <jroedel@suse.de>,
"Chang S. Bae" <chang.seok.bae@intel.com>,
Jan Kiszka <jan.kiszka@siemens.com>
Subject: Re: [PATCH V3 1/7] x86/entry: Use idtentry macro for entry_INT80_compat
Date: Wed, 16 Mar 2022 14:48:26 +0100 [thread overview]
Message-ID: <YjHqqskCnZDgN2NI@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20220315073949.7541-2-jiangshanlai@gmail.com>
On Tue, Mar 15, 2022 at 03:39:43PM +0800, Lai Jiangshan wrote:
> From: Lai Jiangshan <jiangshan.ljs@antgroup.com>
>
> entry_INT80_compat is identical to idtentry macro except a special
> handling for %rax in the prolog.
>
> Add the prolog to idtentry and use idtentry for entry_INT80_compat.
I'm struggling to see the Xen case. Currently it has:
> - /* In the Xen PV case we already run on the thread stack. */
> - ALTERNATIVE "", "jmp .Lint80_keep_stack", X86_FEATURE_XENPV
But idtentry's error_entry() does not have that afaict.
next prev parent reply other threads:[~2022-03-16 13:49 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-15 7:39 [PATCH V3 0/7] x86/entry: Clean up entry code Lai Jiangshan
2022-03-15 7:39 ` [PATCH V3 1/7] x86/entry: Use idtentry macro for entry_INT80_compat Lai Jiangshan
2022-03-16 13:48 ` Peter Zijlstra [this message]
2022-03-15 7:39 ` [PATCH V3 2/7] x86/traps: Move pt_regs only in fixup_bad_iret() Lai Jiangshan
2022-03-15 7:39 ` [PATCH V3 3/7] x86/entry: Switch the stack after error_entry() returns Lai Jiangshan
2022-03-16 2:37 ` Josh Poimboeuf
2022-03-16 3:02 ` Lai Jiangshan
2022-03-16 15:05 ` Peter Zijlstra
2022-03-16 16:43 ` Lai Jiangshan
2022-03-18 11:12 ` Peter Zijlstra
2022-03-15 7:39 ` [PATCH V3 4/7] x86/entry: move PUSH_AND_CLEAR_REGS out of error_entry Lai Jiangshan
2022-03-16 15:07 ` Peter Zijlstra
2022-03-16 16:18 ` Lai Jiangshan
2022-03-15 7:39 ` [PATCH V3 5/7] x86/entry: Move cld to the start of idtentry Lai Jiangshan
2022-03-15 7:39 ` [PATCH V3 6/7] x86/entry: Don't call error_entry for XENPV Lai Jiangshan
2022-03-16 2:59 ` Josh Poimboeuf
2022-03-16 15:09 ` Peter Zijlstra
2022-03-16 16:48 ` Lai Jiangshan
2022-03-15 7:39 ` [PATCH V3 7/7] x86/entry: Convert SWAPGS to swapgs and remove the definition of SWAPGS Lai Jiangshan
2022-03-16 15:12 ` [PATCH V3 0/7] x86/entry: Clean up entry code Peter Zijlstra
2022-03-16 15:13 ` Peter Zijlstra
2022-03-17 12:58 ` Lai Jiangshan
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