[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] x86/hvm: implement save/restore for posted interrupts
Olaf Hering wrote on 2014-07-28: > On Fri, Jul 25, Tian, Kevin wrote: > >> btw, did you run any workload cross save/restore? does it only >> happen with xen-platform-pci device? > > Yes, only with xen-platform-pci. And in my testing only when the > interface provided by netfront is up (ip link set up dev eth0). > > Olaf Hi Olaf, can you try the following patch? I expect this patch will fix the issue. diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c index f6409d6..f0a371b 100644 --- a/xen/arch/x86/hvm/vmx/vmx.c +++ b/xen/arch/x86/hvm/vmx/vmx.c @@ -1517,6 +1517,8 @@ static void vmx_process_isr(int isr, struct vcpu *v) { unsigned long status; u8 old; + int vector; + struct vlapic *s = vcpu_vlapic(v); if ( isr < 0 ) isr = 0; @@ -1530,6 +1532,14 @@ static void vmx_process_isr(int isr, struct vcpu *v) status |= isr << VMX_GUEST_INTR_STATUS_SVI_OFFSET; __vmwrite(GUEST_INTR_STATUS, status); } + for ( vector = 0; vector < NR_VECTORS; vector++ ) + if (vlapic_test_vector(vector, &s->regs->data[APIC_ISR])) + set_bit(vector, v->arch.hvm_vmx.eoi_exit_bitmap); + + __vmwrite(0x201c, v->arch.hvm_vmx.eoi_exit_bitmap[0]); + __vmwrite(0x201e, v->arch.hvm_vmx.eoi_exit_bitmap[1]); + __vmwrite(0x2020, v->arch.hvm_vmx.eoi_exit_bitmap[2]); + __vmwrite(0x2022, v->arch.hvm_vmx.eoi_exit_bitmap[3]); vmx_vmcs_exit(v); } diff --git a/xen/include/asm-x86/hvm/vlapic.h b/xen/include/asm-x86/hvm/vlapic.h index 66f0aff..2a83a1e 100644 --- a/xen/include/asm-x86/hvm/vlapic.h +++ b/xen/include/asm-x86/hvm/vlapic.h @@ -58,6 +58,8 @@ #define VEC_POS(v) ((v) % 32) #define REG_POS(v) (((v) / 32) * 0x10) +#define vlapic_test_vector(vec, bitmap) \ + test_bit(VEC_POS(vec), (uint32_t *)((bitmap) + REG_POS(vec))) #define vlapic_test_and_set_vector(vec, bitmap) \ test_and_set_bit(VEC_POS(vec), (uint32_t *)((bitmap) + REG_POS(vec))) #define vlapic_test_and_clear_vector(vec, bitmap) Best regards, Yang _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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