Message ID | 20230731064055.3842-1-xin3.li@intel.com |
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State | New |
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([172.25.112.68]) by fmsmga007.fm.intel.com with ESMTP; 31 Jul 2023 00:09:26 -0700 From: Xin Li <xin3.li@intel.com> To: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-edac@vger.kernel.org, linux-hyperv@vger.kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org Cc: Jonathan Corbet <corbet@lwn.net>, 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>, Andy Lutomirski <luto@kernel.org>, Oleg Nesterov <oleg@redhat.com>, Tony Luck <tony.luck@intel.com>, "K . Y . Srinivasan" <kys@microsoft.com>, Haiyang Zhang <haiyangz@microsoft.com>, Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>, Paolo Bonzini <pbonzini@redhat.com>, Wanpeng Li <wanpengli@tencent.com>, Vitaly Kuznetsov <vkuznets@redhat.com>, Sean Christopherson <seanjc@google.com>, Peter Zijlstra <peterz@infradead.org>, Juergen Gross <jgross@suse.com>, Stefano Stabellini <sstabellini@kernel.org>, Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>, Josh Poimboeuf <jpoimboe@kernel.org>, "Paul E . McKenney" <paulmck@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Randy Dunlap <rdunlap@infradead.org>, Steven Rostedt <rostedt@goodmis.org>, Kim Phillips <kim.phillips@amd.com>, Xin Li <xin3.li@intel.com>, Hyeonggon Yoo <42.hyeyoo@gmail.com>, "Liam R . Howlett" <Liam.Howlett@Oracle.com>, Sebastian Reichel <sebastian.reichel@collabora.com>, "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>, Suren Baghdasaryan <surenb@google.com>, Pawan Gupta <pawan.kumar.gupta@linux.intel.com>, Jiaxi Chen <jiaxi.chen@linux.intel.com>, Babu Moger <babu.moger@amd.com>, Jim Mattson <jmattson@google.com>, Sandipan Das <sandipan.das@amd.com>, Lai Jiangshan <jiangshanlai@gmail.com>, Hans de Goede <hdegoede@redhat.com>, Reinette Chatre <reinette.chatre@intel.com>, Daniel Sneddon <daniel.sneddon@linux.intel.com>, Breno Leitao <leitao@debian.org>, Nikunj A Dadhania <nikunj@amd.com>, Brian Gerst <brgerst@gmail.com>, Sami Tolvanen <samitolvanen@google.com>, Alexander Potapenko <glider@google.com>, Andrew Morton <akpm@linux-foundation.org>, Arnd Bergmann <arnd@arndb.de>, "Eric W . Biederman" <ebiederm@xmission.com>, Kees Cook <keescook@chromium.org>, Masami Hiramatsu <mhiramat@kernel.org>, Masahiro Yamada <masahiroy@kernel.org>, Ze Gao <zegao2021@gmail.com>, Fei Li <fei1.li@intel.com>, Conghui <conghui.chen@intel.com>, Ashok Raj <ashok.raj@intel.com>, "Jason A . Donenfeld" <Jason@zx2c4.com>, Mark Rutland <mark.rutland@arm.com>, Jacob Pan <jacob.jun.pan@linux.intel.com>, Jiapeng Chong <jiapeng.chong@linux.alibaba.com>, Jane Malalane <jane.malalane@citrix.com>, David Woodhouse <dwmw@amazon.co.uk>, Boris Ostrovsky <boris.ostrovsky@oracle.com>, Arnaldo Carvalho de Melo <acme@redhat.com>, Yantengsi <siyanteng@loongson.cn>, Christophe Leroy <christophe.leroy@csgroup.eu>, Sathvika Vasireddy <sv@linux.ibm.com> Subject: [PATCH v9 27/36] x86/traps: Add external_interrupt() to dispatch external interrupts Date: Sun, 30 Jul 2023 23:40:55 -0700 Message-Id: <20230731064055.3842-1-xin3.li@intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: <linux-kernel.vger.kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1772921620674297689 X-GMAIL-MSGID: 1772921620674297689 |
Series |
x86: enable FRED for x86-64
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Commit Message
Li, Xin3
July 31, 2023, 6:40 a.m. UTC
From: "H. Peter Anvin (Intel)" <hpa@zytor.com> external_interrupt() dispatches all external interrupts: it checks if an external interrupt is a system interrupt, if yes it dipatches it through the system_interrupt_handlers table, otherwise to dispatch_common_interrupt(). Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com> Co-developed-by: Xin Li <xin3.li@intel.com> Tested-by: Shan Kang <shan.kang@intel.com> Signed-off-by: Xin Li <xin3.li@intel.com> --- Changes since v8: * Reword the patch description, which was confusing (Thomas Gleixner). Changes since v5: * Initialize system_interrupt_handlers with dispatch_table_spurious_interrupt() instead of NULL to get rid of a branch (Peter Zijlstra). --- arch/x86/include/asm/traps.h | 2 ++ arch/x86/kernel/traps.c | 18 ++++++++++++++++++ 2 files changed, 20 insertions(+)
diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h index cba3e4dfc329..48daa78ee88c 100644 --- a/arch/x86/include/asm/traps.h +++ b/arch/x86/include/asm/traps.h @@ -66,4 +66,6 @@ static inline void sysvec_setup_fred(unsigned int vector, system_interrupt_handl alloc_intr_gate(vector, asm_##func); \ } +int external_interrupt(struct pt_regs *regs); + #endif /* _ASM_X86_TRAPS_H */ diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 9040c7f01c93..90fdfcccee7a 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -1542,6 +1542,24 @@ void set_sysvec_handler(unsigned int i, system_interrupt_handler func) system_interrupt_handlers[i] = func; } +int external_interrupt(struct pt_regs *regs) +{ + unsigned int vector = regs->vector; + unsigned int sysvec = vector - FIRST_SYSTEM_VECTOR; + + if (unlikely(vector < FIRST_EXTERNAL_VECTOR)) { + pr_err("invalid external interrupt vector %d\n", vector); + return -EINVAL; + } + + if (sysvec < NR_SYSTEM_VECTORS) + system_interrupt_handlers[sysvec](regs); + else + dispatch_common_interrupt(regs, vector); + + return 0; +} + #endif /* CONFIG_X86_64 */ void __init trap_init(void)