linux-kernel - Re: [PATCH] x86/paravirt: convert simple paravirt functions to asm

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Message-ID: <20230316201421.GA2060174@hirez.programming.kicks-ass.net>
Date:   Thu, 16 Mar 2023 21:14:21 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Juergen Gross <jgross@...e.com>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        virtualization@...ts.linux-foundation.org,
        "Srivatsa S. Bhat (VMware)" <srivatsa@...il.mit.edu>,
        Alexey Makhalov <amakhalov@...are.com>,
        VMware PV-Drivers Reviewers <pv-drivers@...are.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] x86/paravirt: convert simple paravirt functions to asm

On Wed, Mar 08, 2023 at 04:42:10PM +0100, Juergen Gross wrote:

> +DEFINE_PARAVIRT_ASM(pv_native_irq_disable, "cli", .text);
> +DEFINE_PARAVIRT_ASM(pv_native_irq_enable, "sti", .text);
> +DEFINE_PARAVIRT_ASM(pv_native_read_cr2, "mov %cr2, %rax", .text);

per these v, the above ^ should be in .noinstr.text

> -static noinstr unsigned long pv_native_read_cr2(void)
> -static noinstr void pv_native_irq_enable(void)
> -static noinstr void pv_native_irq_disable(void)