linux-kernel - [PATCH 0/6] x86/irq: trap and interrupt cleanups

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Message-Id: <20210511005531.1065536-1-hpa@zytor.com>
Date:   Mon, 10 May 2021 17:55:25 -0700
From:   "H. Peter Anvin" <hpa@...or.com>
To:     Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>
Cc:     Steve Wahl <steve.wahl@....com>, Mike Travis <mike.travis@....com>,
        Dimitri Sivanich <dimitri.sivanich@....com>,
        Russ Anderson <russ.anderson@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "H. Peter Anvin (Intel)" <hpa@...or.com>
Subject: [PATCH 0/6] x86/irq: trap and interrupt cleanups

From: "H. Peter Anvin (Intel)" <hpa@...or.com>

A collection of trap/interrupt-related patches, almost all
cleanups. The only patches that should have any possible effect at all
are:

4/6 - x86/irq: merge common code in DEFINE_IDTENTRY_SYSVEC[_SIMPLE]

	This patch reverses kvm_set_cpu_l1tf_flush_l1d() and
	__irq_enter_raw() in DEFINE_IDTENTRY_SYSVEC_SIMPLE() in order
	to be able to unify the code with DEFINE_IDTENTRY_SYSVEC().

	The reason for unification is mainly to avoid the possibility
	of inadvertent divergence rather than the rather modest amount
	of code.

5/6 - x86/irq: WARN_ONCE() if irq_move_cleanup is called on a pending interrupt

	This condition is believed to be impossible after many
	improvements to the IRQ vector allocation code since this
	function was written. Per discussion with tglx, add a
	WARN_ONCE() if this happens as a first step towards excising
	this hack.

--- 
    x86/traps: add X86_NR_HW_TRAPS to <asm/trapnr.h>
    x86/irqvector: add NR_EXTERNAL_VECTORS and NR_SYSTEM_VECTORS
    x86/idt: remove address argument to idt_invalidate()
    x86/irq: merge common code in DEFINE_IDTENTRY_SYSVEC[_SIMPLE]
    x86/irq: WARN_ONCE() if irq_move_cleanup is called on a pending interrupt
    x86/irq: remove unused vectors from <asm/irq_vectors.h>

 arch/x86/include/asm/desc.h              |  2 +-
 arch/x86/include/asm/idtentry.h          | 39 +++++++++++++++++---------------
 arch/x86/include/asm/irq_vectors.h       |  7 ++++--
 arch/x86/include/asm/trapnr.h            |  1 +
 arch/x86/kernel/apic/vector.c            |  5 ++++
 arch/x86/kernel/idt.c                    |  5 ++--
 arch/x86/kernel/machine_kexec_32.c       |  4 ++--
 arch/x86/kernel/reboot.c                 |  2 +-
 tools/arch/x86/include/asm/irq_vectors.h |  7 ++++--
 9 files changed, 43 insertions(+), 29 deletions(-)