From mboxrd@z Thu Jan 1 00:00:00 1970 From: Feng Wu Subject: [PATCH v9 07/17] vmx: Initialize VT-d Posted-Interrupts Descriptor Date: Tue, 3 Nov 2015 16:43:17 +0800 Message-ID: <1446540207-4806-8-git-send-email-feng.wu@intel.com> References: <1446540207-4806-1-git-send-email-feng.wu@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1446540207-4806-1-git-send-email-feng.wu@intel.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org Cc: Keir Fraser , Kevin Tian , Feng Wu , Jan Beulich , Andrew Cooper List-Id: xen-devel@lists.xenproject.org This patch initializes the VT-d Posted-interrupt Descriptor. CC: Kevin Tian CC: Keir Fraser CC: Jan Beulich CC: Andrew Cooper Signed-off-by: Feng Wu Acked-by: Kevin Tian Reviewed-by: Konrad Rzeszutek Wilk --- v7: - Add comments to function 'pi_desc_init' to clarify why we update the posted-interrupt descriptor in non-atomical way in it. v3: - Move pi_desc_init() to xen/arch/x86/hvm/vmx/vmcs.c - Remove the 'inline' flag of pi_desc_init() xen/arch/x86/hvm/vmx/vmcs.c | 22 ++++++++++++++++++++++ xen/include/asm-x86/hvm/vmx/vmx.h | 2 ++ 2 files changed, 24 insertions(+) diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c index a0a97e7..5f67797 100644 --- a/xen/arch/x86/hvm/vmx/vmcs.c +++ b/xen/arch/x86/hvm/vmx/vmcs.c @@ -39,6 +39,7 @@ #include #include #include +#include static bool_t __read_mostly opt_vpid_enabled = 1; boolean_param("vpid", opt_vpid_enabled); @@ -951,6 +952,24 @@ void virtual_vmcs_vmwrite(void *vvmcs, u32 vmcs_encoding, u64 val) virtual_vmcs_exit(vvmcs); } +/* + * This function is only called in a vCPU's initialization phase, + * so we can update the posted-interrupt descriptor in non-atomic way. + */ +static void pi_desc_init(struct vcpu *v) +{ + uint32_t dest; + + v->arch.hvm_vmx.pi_desc.nv = posted_intr_vector; + + dest = cpu_physical_id(v->processor); + + if ( x2apic_enabled ) + v->arch.hvm_vmx.pi_desc.ndst = dest; + else + v->arch.hvm_vmx.pi_desc.ndst = MASK_INSR(dest, PI_xAPIC_NDST_MASK); +} + static int construct_vmcs(struct vcpu *v) { struct domain *d = v->domain; @@ -1089,6 +1108,9 @@ static int construct_vmcs(struct vcpu *v) if ( cpu_has_vmx_posted_intr_processing ) { + if ( iommu_intpost ) + pi_desc_init(v); + __vmwrite(PI_DESC_ADDR, virt_to_maddr(&v->arch.hvm_vmx.pi_desc)); __vmwrite(POSTED_INTR_NOTIFICATION_VECTOR, posted_intr_vector); } diff --git a/xen/include/asm-x86/hvm/vmx/vmx.h b/xen/include/asm-x86/hvm/vmx/vmx.h index 8d91110..70b254f 100644 --- a/xen/include/asm-x86/hvm/vmx/vmx.h +++ b/xen/include/asm-x86/hvm/vmx/vmx.h @@ -88,6 +88,8 @@ typedef enum { #define EPT_EMT_WB 6 #define EPT_EMT_RSV2 7 +#define PI_xAPIC_NDST_MASK 0xFF00 + void vmx_asm_vmexit_handler(struct cpu_user_regs); void vmx_asm_do_vmentry(void); void vmx_intr_assist(void); -- 2.1.0