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x-conformance=sidf_compatible IronPort-SDR: BL0oi4FL44WwaP1uFUmA1+5gOTXdI+MwOnvHcCIz1icbZUU1wH/TI8rOg6PSYFXmxfWcBixynF BXBRk5XYBsxGkqPJRoGuTlbKOVNnFhQ9TG0gVKugHkvGflVeLjwID6HAs+wD2m3IbWWLzc/OZt 4d9qxqQ+Xs1LHOxSG9Q6Cr6noEKBFcUADm7QPjykQuZINN/PvUNNlR1fIITXFi2hegtsLmbT0m WSMNizE3cBdfGZKr5Pi5Aq5vAgDjXkSKeG1MMJcgJUhHRj/z1zqEpLz36ALTaOZD/wXItpHMkP yw0= X-SBRS: 2.7 X-MesageID: 13386971 X-Ironport-Server: esa5.hc3370-68.iphmx.com X-Remote-IP: 162.221.158.21 X-Policy: $RELAYED X-IronPort-AV: E=Sophos;i="5.70,488,1574139600"; d="scan'208";a="13386971" From: Roger Pau Monne To: Date: Wed, 26 Feb 2020 13:19:20 +0100 Message-ID: <20200226121921.28627-4-roger.pau@citrix.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200226121921.28627-1-roger.pau@citrix.com> References: <20200226121921.28627-1-roger.pau@citrix.com> MIME-Version: 1.0 Subject: [Xen-devel] [PATCH v4 3/4] x86: track when in #MC context X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Andrew Cooper , Wei Liu , Jan Beulich , Roger Pau Monne Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Add helpers to track when executing in #MC handler context. This is modeled after the in_irq helpers. Note that there are no users of in_mce_handler() introduced by the change, further users will be added by followup changes. Signed-off-by: Roger Pau Monn=C3=A9 Reviewed-by: Jan Beulich --- Changes since v3: - Rename to in_mce_handler. - Drop parentheses around cpu in macro. Changes since v2: - Move definition of mc_count to x86 hardirq.h. --- xen/arch/x86/cpu/mcheck/mce.c | 2 ++ xen/include/asm-x86/hardirq.h | 6 ++++++ 2 files changed, 8 insertions(+) diff --git a/xen/arch/x86/cpu/mcheck/mce.c b/xen/arch/x86/cpu/mcheck/mce.c index d61e582af3..e5bd4f542c 100644 --- a/xen/arch/x86/cpu/mcheck/mce.c +++ b/xen/arch/x86/cpu/mcheck/mce.c @@ -93,7 +93,9 @@ void x86_mce_vector_register(x86_mce_vector_t hdlr) =20 void do_machine_check(const struct cpu_user_regs *regs) { + mce_enter(); _machine_check_vector(regs); + mce_exit(); } =20 /* diff --git a/xen/include/asm-x86/hardirq.h b/xen/include/asm-x86/hardirq.h index 069e48fce9..276e3419d7 100644 --- a/xen/include/asm-x86/hardirq.h +++ b/xen/include/asm-x86/hardirq.h @@ -8,6 +8,7 @@ typedef struct { unsigned int __softirq_pending; unsigned int __local_irq_count; unsigned int nmi_count; + unsigned int mce_count; bool_t __mwait_wakeup; } __cacheline_aligned irq_cpustat_t; =20 @@ -23,6 +24,11 @@ typedef struct { #define nmi_enter() (nmi_count(smp_processor_id())++) #define nmi_exit() (nmi_count(smp_processor_id())--) =20 +#define mce_count(cpu) __IRQ_STAT(cpu, mce_count) +#define in_mce_handler() (mce_count(smp_processor_id()) !=3D 0) +#define mce_enter() (mce_count(smp_processor_id())++) +#define mce_exit() (mce_count(smp_processor_id())--) + void ack_bad_irq(unsigned int irq); =20 extern void apic_intr_init(void); --=20 2.25.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel