This patch initialize the VT-d Posted-interrupt Descritpor. Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx> --- arch/x86/include/asm/irq_remapping.h | 1 + arch/x86/kernel/apic/apic.c | 1 + arch/x86/kvm/vmx.c | 56 ++++++++++++++++++++++++++++++++- 3 files changed, 56 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h index b7747c4..a3cc437 100644 --- a/arch/x86/include/asm/irq_remapping.h +++ b/arch/x86/include/asm/irq_remapping.h @@ -57,6 +57,7 @@ extern bool setup_remapped_irq(int irq, struct irq_chip *chip); void irq_remap_modify_chip_defaults(struct irq_chip *chip); +extern int irq_post_enabled; #else /* CONFIG_IRQ_REMAP */ diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index ba6cc04..987408d 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -162,6 +162,7 @@ __setup("apicpmtimer", setup_apicpmtimer); #endif int x2apic_mode; +EXPORT_SYMBOL_GPL(x2apic_mode); #ifdef CONFIG_X86_X2APIC /* x2apic enabled before OS handover */ int x2apic_preenabled; diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 3e556c6..a4670d3 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -45,6 +45,7 @@ #include <asm/perf_event.h> #include <asm/debugreg.h> #include <asm/kexec.h> +#include <asm/irq_remapping.h> #include "trace.h" @@ -408,13 +409,32 @@ struct nested_vmx { }; #define POSTED_INTR_ON 0 +#define POSTED_INTR_SN 1 + /* Posted-Interrupt Descriptor */ struct pi_desc { u32 pir[8]; /* Posted interrupt requested */ - u32 control; /* bit 0 of control is outstanding notification bit */ - u32 rsvd[7]; + union { + struct { + u64 on : 1, + sn : 1, + rsvd_1 : 13, + ndm : 1, + nv : 8, + rsvd_2 : 8, + ndst : 32; + }; + u64 control; + }; + u32 rsvd[6]; } __aligned(64); +static void pi_clear_sn(struct pi_desc *pi_desc) +{ + return clear_bit(POSTED_INTR_SN, + (unsigned long *)&pi_desc->control); +} + static bool pi_test_and_set_on(struct pi_desc *pi_desc) { return test_and_set_bit(POSTED_INTR_ON, @@ -4396,6 +4416,33 @@ static void ept_set_mmio_spte_mask(void) kvm_mmu_set_mmio_spte_mask((0x3ull << 62) | 0x6ull); } +static bool pi_desc_init(struct vcpu_vmx *vmx) +{ + unsigned int dest; + + if (irq_post_enabled == 0) + return true; + + /* + * Initialize Posted-Interrupt Descriptor + */ + + pi_clear_sn(&vmx->pi_desc); + vmx->pi_desc.nv = POSTED_INTR_VECTOR; + + /* Physical mode for Notificaiton Event */ + vmx->pi_desc.ndm = 0; + dest = cpu_physical_id(vmx->vcpu.cpu); + + if (x2apic_mode) + vmx->pi_desc.ndst = dest; + else + vmx->pi_desc.ndst = (dest << 8) & 0xFF00; + + return true; +} + + /* * Sets up the vmcs for emulated real mode. */ @@ -4439,6 +4486,11 @@ static int vmx_vcpu_setup(struct vcpu_vmx *vmx) vmcs_write64(POSTED_INTR_NV, POSTED_INTR_VECTOR); vmcs_write64(POSTED_INTR_DESC_ADDR, __pa((&vmx->pi_desc))); + + if (!pi_desc_init(vmx)) { + printk(KERN_ERR "Initialize PI descriptor error!\n"); + return 1; + } } if (ple_gap) { -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html