From: Lin Ming Subject: [PATCH] xen/apic: implement io apic read with hypercall Date: Fri, 20 Apr 2012 17:25:57 +0800 Message-ID: <1334913957.2863.1.camel@hp6530s> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Konrad Rzeszutek Wilk Cc: xen-devel@lists.xensource.com, linux-kernel@vger.kernel.org List-Id: xen-devel@lists.xenproject.org Implements xen_io_apic_read with hypercall, so it returns proper IO-APIC information instead of fabricated one. Signed-off-by: Lin Ming --- arch/x86/xen/apic.c | 16 +++++++++++----- 1 files changed, 11 insertions(+), 5 deletions(-) diff --git a/arch/x86/xen/apic.c b/arch/x86/xen/apic.c index aee16ab..f1f392d 100644 --- a/arch/x86/xen/apic.c +++ b/arch/x86/xen/apic.c @@ -1,14 +1,20 @@ #include #include +#include +#include +#include unsigned int xen_io_apic_read(unsigned apic, unsigned reg) { - if (reg == 0x1) - return 0x00170020; - else if (reg == 0x0) - return apic << 24; + struct physdev_apic apic_op; + int ret; - return 0xff; + apic_op.apic_physbase = mpc_ioapic_addr(apic); + apic_op.reg = reg; + ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op); + if (ret) + return ret; + return apic_op.value; } void __init xen_init_apic(void) -- 1.7.2.5