lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20230731063317.3720-26-xin3.li@intel.com>
Date:   Sun, 30 Jul 2023 23:33:06 -0700
From:   Xin Li <xin3.li@...el.com>
To:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-edac@...r.kernel.org, linux-hyperv@...r.kernel.org,
        kvm@...r.kernel.org, xen-devel@...ts.xenproject.org
Cc:     Jonathan Corbet <corbet@....net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H . Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Oleg Nesterov <oleg@...hat.com>,
        Tony Luck <tony.luck@...el.com>,
        "K . Y . Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Kim Phillips <kim.phillips@....com>,
        Xin Li <xin3.li@...el.com>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>,
        "Liam R . Howlett" <Liam.Howlett@...cle.com>,
        Sebastian Reichel <sebastian.reichel@...labora.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
        Jiaxi Chen <jiaxi.chen@...ux.intel.com>,
        Babu Moger <babu.moger@....com>,
        Jim Mattson <jmattson@...gle.com>,
        Sandipan Das <sandipan.das@....com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Daniel Sneddon <daniel.sneddon@...ux.intel.com>,
        Breno Leitao <leitao@...ian.org>,
        Nikunj A Dadhania <nikunj@....com>,
        Brian Gerst <brgerst@...il.com>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Alexander Potapenko <glider@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Eric W . Biederman" <ebiederm@...ssion.com>,
        Kees Cook <keescook@...omium.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Ze Gao <zegao2021@...il.com>, Fei Li <fei1.li@...el.com>,
        Conghui <conghui.chen@...el.com>,
        Ashok Raj <ashok.raj@...el.com>,
        "Jason A . Donenfeld" <Jason@...c4.com>,
        Mark Rutland <mark.rutland@....com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>,
        Jane Malalane <jane.malalane@...rix.com>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Yantengsi <siyanteng@...ngson.cn>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Sathvika Vasireddy <sv@...ux.ibm.com>
Subject: [PATCH v9 25/36] x86/traps: Add a system interrupt handler table for system interrupt dispatch

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

On x86, external interrupts can be categorized into two groups:
  1) System interrupts
  2) External device interrupts

All external device interrupts are directed to the common_interrupt(),
which, in turn, dispatches these external device interrupts using a
per-CPU external device interrupt dispatch table vector_irq.

To handle system interrupts, a system interrupt handler table needs to
be introduced. This table enables the direct dispatching of a system
interrupt to its corresponding handler. As a result, a software-based
dispatch function will be implemented as:

  void external_interrupt(struct pt_regs *regs)
  {
    u8 vector = regs->vector;
    if (is_system_interrupt(vector))
      system_interrupt_handlers[vector_to_sysvec(vector)](regs);
    else /* external device interrupt */
      common_interrupt(regs);
  }

Signed-off-by: H. Peter Anvin (Intel) <hpa@...or.com>
Co-developed-by: Xin Li <xin3.li@...el.com>
Tested-by: Shan Kang <shan.kang@...el.com>
Signed-off-by: Xin Li <xin3.li@...el.com>
---

Changes since v8:
* Remove junk code that assumes no local APIC on x86_64 (Thomas Gleixner).

Changes since v5:
* Initialize system_interrupt_handlers with dispatch_table_spurious_interrupt()
  instead of NULL to get rid of any NULL check (Peter Zijlstra).
---
 arch/x86/kernel/traps.c | 50 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 49dd92458eb0..e430a8c47931 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -1488,6 +1488,56 @@ DEFINE_IDTENTRY_SW(iret_error)
 }
 #endif
 
+#ifdef CONFIG_X86_64
+
+static void dispatch_table_spurious_interrupt(struct pt_regs *regs)
+{
+	dispatch_spurious_interrupt(regs, regs->vector);
+}
+
+#define SYSV(x,y) [(x) - FIRST_SYSTEM_VECTOR] = y
+
+static system_interrupt_handler system_interrupt_handlers[NR_SYSTEM_VECTORS] = {
+	[0 ... NR_SYSTEM_VECTORS-1]		= dispatch_table_spurious_interrupt,
+#ifdef CONFIG_SMP
+	SYSV(RESCHEDULE_VECTOR,			dispatch_table_sysvec_reschedule_ipi),
+	SYSV(CALL_FUNCTION_VECTOR,		dispatch_table_sysvec_call_function),
+	SYSV(CALL_FUNCTION_SINGLE_VECTOR,	dispatch_table_sysvec_call_function_single),
+	SYSV(REBOOT_VECTOR,			dispatch_table_sysvec_reboot),
+#endif
+
+#ifdef CONFIG_X86_THERMAL_VECTOR
+	SYSV(THERMAL_APIC_VECTOR,		dispatch_table_sysvec_thermal),
+#endif
+
+#ifdef CONFIG_X86_MCE_THRESHOLD
+	SYSV(THRESHOLD_APIC_VECTOR,		dispatch_table_sysvec_threshold),
+#endif
+
+#ifdef CONFIG_X86_MCE_AMD
+	SYSV(DEFERRED_ERROR_VECTOR,		dispatch_table_sysvec_deferred_error),
+#endif
+
+#ifdef CONFIG_X86_LOCAL_APIC
+	SYSV(LOCAL_TIMER_VECTOR,		dispatch_table_sysvec_apic_timer_interrupt),
+	SYSV(X86_PLATFORM_IPI_VECTOR,		dispatch_table_sysvec_x86_platform_ipi),
+# ifdef CONFIG_HAVE_KVM
+	SYSV(POSTED_INTR_VECTOR,		dispatch_table_sysvec_kvm_posted_intr_ipi),
+	SYSV(POSTED_INTR_WAKEUP_VECTOR,		dispatch_table_sysvec_kvm_posted_intr_wakeup_ipi),
+	SYSV(POSTED_INTR_NESTED_VECTOR,		dispatch_table_sysvec_kvm_posted_intr_nested_ipi),
+# endif
+# ifdef CONFIG_IRQ_WORK
+	SYSV(IRQ_WORK_VECTOR,			dispatch_table_sysvec_irq_work),
+# endif
+	SYSV(SPURIOUS_APIC_VECTOR,		dispatch_table_sysvec_spurious_apic_interrupt),
+	SYSV(ERROR_APIC_VECTOR,			dispatch_table_sysvec_error_interrupt),
+#endif
+};
+
+#undef SYSV
+
+#endif /* CONFIG_X86_64 */
+
 void __init trap_init(void)
 {
 	/* Init cpu_entry_area before IST entries are set up */
-- 
2.34.1

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ