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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-ia64-devel][PATCH][VTD] add structure and helper function for interrupt sharing
On Wed, Oct 15, 2008 at 05:44:41PM +0800, Xu, Anthony wrote:
> add structure and helper function for interrupt sharing
>
> Sign-off-by; Anthony Xu < anthony.xu@xxxxxxxxx >
>
>
> Anthony
Hi.
Some comments below.
> add structure and helper function for interrupt sharing
>
> Sign-off-by; Anthony Xu < anthony.xu@xxxxxxxxx >
^ ^ no space around email address.
not semicolon, but colon.
>
>
> diff -r 9b227eb09263 xen/arch/ia64/linux-xen/irq_ia64.c
> --- a/xen/arch/ia64/linux-xen/irq_ia64.c Tue Oct 14 19:19:48 2008 +0100
> +++ b/xen/arch/ia64/linux-xen/irq_ia64.c Wed Oct 15 17:18:25 2008 +0800
> @@ -334,3 +334,62 @@
>
> writeq(ipi_data, ipi_addr);
> }
> +
> +
> +static void __hvm_pci_intx_assert(
> + struct domain *d, unsigned int device, unsigned int intx)
> +{
> + struct hvm_irq *hvm_irq = &d->arch.hvm_domain.irq;
> + unsigned int gsi;
> +
> + ASSERT((device <= 31) && (intx <= 3));
> +
> + if ( __test_and_set_bit(device*4 + intx, &hvm_irq->pci_intx.i) )
> + return;
> + gsi = hvm_pci_intx_gsi(device, intx);
> + if ( ++hvm_irq->gsi_assert_count[gsi] == 1 )
> + viosapic_set_irq(d, gsi, 1);
> +}
> +
> +
> +void hvm_pci_intx_assert(
> + struct domain *d, unsigned int device, unsigned int intx)
> +{
> + __hvm_pci_intx_assert(d, device, intx);
> +}
> +
Why are the two version (with and without __) defined?
Looking x86 version, a lock will be added in future. doesn't it?
> +static void __hvm_pci_intx_deassert(
> + struct domain *d, unsigned int device, unsigned int intx)
> +{
> + struct hvm_irq *hvm_irq = &d->arch.hvm_domain.irq;
> + unsigned int gsi;
> +
> + ASSERT((device <= 31) && (intx <= 3));
> +
> + if ( !__test_and_clear_bit(device*4 + intx, &hvm_irq->pci_intx.i) )
> + return;
> +
> + gsi = hvm_pci_intx_gsi(device, intx);
> +
> + if (--hvm_irq->gsi_assert_count[gsi] == 0)
> + viosapic_set_irq(d, gsi, 0);
> +}
> +
> +void hvm_pci_intx_deassert(
> + struct domain *d, unsigned int device, unsigned int intx)
> +{
> + __hvm_pci_intx_deassert(d, device, intx);
> +}
> +
> +void hvm_isa_irq_assert(
> + struct domain *d, unsigned int isa_irq)
> +{
> +}
> +
> +
> +void hvm_isa_irq_deassert(
> + struct domain *d, unsigned int isa_irq)
> +{
> +}
> +
> +
Those are for HVM domain, so please move them under
the directory, xen/arch/ia64/vmx.
> diff -r 9b227eb09263 xen/arch/ia64/vmx/viosapic.c
> --- a/xen/arch/ia64/vmx/viosapic.c Tue Oct 14 19:19:48 2008 +0100
> +++ b/xen/arch/ia64/vmx/viosapic.c Wed Oct 15 17:18:25 2008 +0800
> @@ -314,10 +314,6 @@
> out:
> spin_unlock(&viosapic->lock);
> }
> -
> -#define hvm_pci_intx_gsi(dev, intx) \
> - (((((dev) << 2) + ((dev) >> 3) + (intx)) & 31) + 16)
> -
>
> void viosapic_set_pci_irq(struct domain *d, int device, int intx, int level)
> {
> diff -r 9b227eb09263 xen/arch/ia64/xen/domain.c
> --- a/xen/arch/ia64/xen/domain.c Tue Oct 14 19:19:48 2008 +0100
> +++ b/xen/arch/ia64/xen/domain.c Wed Oct 15 17:18:25 2008 +0800
> @@ -568,6 +568,8 @@
>
> if (is_idle_domain(d))
> return 0;
> +
> + INIT_LIST_HEAD(&d->arch.pdev_list);
>
> foreign_p2m_init(d);
> #ifdef CONFIG_XEN_IA64_PERVCPU_VHPT
> diff -r 9b227eb09263 xen/include/asm-ia64/domain.h
> --- a/xen/include/asm-ia64/domain.h Tue Oct 14 19:19:48 2008 +0100
> +++ b/xen/include/asm-ia64/domain.h Wed Oct 15 17:18:25 2008 +0800
> @@ -129,6 +129,8 @@
> /* Set an optimization feature in the struct arch_domain. */
> extern int domain_opt_feature(struct domain *, struct xen_ia64_opt_feature*);
>
> +#define has_arch_pdevs(d) (!list_empty(&(d)->arch.pdev_list))
> +
> struct arch_domain {
> struct mm_struct mm;
>
> @@ -166,6 +168,7 @@
> unsigned char rid_bits; /* number of virtual rid bits (default:
> 18) */
> int breakimm; /* The imm value for hypercalls. */
>
> + struct list_head pdev_list;
> struct virtual_platform_def vmx_platform;
> #define hvm_domain vmx_platform /* platform defs are not vmx specific */
>
> diff -r 9b227eb09263 xen/include/asm-ia64/hvm/irq.h
> --- /dev/null Thu Jan 01 00:00:00 1970 +0000
> +++ b/xen/include/asm-ia64/hvm/irq.h Wed Oct 15 17:18:25 2008 +0800
> @@ -0,0 +1,178 @@
> +/******************************************************************************
> + * irq.h
> + *
> + * Interrupt distribution and delivery logic.
> + *
> + * Copyright (c) 2006, K A Fraser, XenSource Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License along
> with
> + * this program; if not, write to the Free Software Foundation, Inc., 59
> Temple
> + * Place - Suite 330, Boston, MA 02111-1307 USA.
> + */
> +
> +#ifndef __ASM_IA64_HVM_IRQ_H__
> +#define __ASM_IA64_HVM_IRQ_H__
> +
> +#include <xen/types.h>
> +#include <xen/spinlock.h>
> +#include <asm/irq.h>
> +#include <public/hvm/save.h>
> +#include <xen/irq.h>
> +
> +#define NR_VECTORS 256
> +#define VIOAPIC_NUM_PINS 48
> +
> +
> +
> +struct dev_intx_gsi_link {
> + struct list_head list;
> + uint8_t device;
> + uint8_t intx;
> + uint8_t gsi;
> + uint8_t link;
> +};
> +
> +struct hvm_hw_pci_irqs {
> + /*
> + * Virtual interrupt wires for a single PCI bus.
> + * Indexed by: device*4 + INTx#.
> + */
> + union {
> + DECLARE_BITMAP(i, 32*4);
> + uint64_t pad[2];
> + };
> +};
In the x86 case, they are defined in public/arch-x86/hvm/save.h.
Although I'm not sure, aren't they needed for save/restore?
> +
> +#define HVM_IRQ_DPCI_VALID 0x1
> +#define HVM_IRQ_DPCI_MSI 0x2
> +#define _HVM_IRQ_DPCI_MSI 0x1
> +
> +
> +struct hvm_gmsi_info {
> + uint32_t gvec;
> + uint32_t gflags;
> +};
> +
> +struct hvm_mirq_dpci_mapping {
> + uint32_t flags;
> + int pending;
> + struct list_head digl_list;
> + struct domain *dom;
> + struct hvm_gmsi_info gmsi;
> +};
> +
> +struct hvm_girq_dpci_mapping {
> + uint8_t valid;
> + uint8_t device;
> + uint8_t intx;
> + uint8_t machine_gsi;
> +};
> +
> +#define NR_ISAIRQS 16
> +#define NR_LINK 4
> +struct hvm_irq_dpci {
> + spinlock_t dirq_lock;
> + /* Machine IRQ to guest device/intx mapping. */
> + struct hvm_mirq_dpci_mapping mirq[NR_IRQS];
> + /* Guest IRQ to guest device/intx mapping. */
> + struct hvm_girq_dpci_mapping girq[NR_IRQS];
> + uint8_t msi_gvec_pirq[NR_VECTORS];
> + DECLARE_BITMAP(dirq_mask, NR_IRQS);
> + /* Record of mapped ISA IRQs */
> + DECLARE_BITMAP(isairq_map, NR_ISAIRQS);
> + /* Record of mapped Links */
> + uint8_t link_cnt[NR_LINK];
> + struct timer hvm_timer[NR_IRQS];
> +};
> +
> +struct hvm_irq {
> + /*
> + * Virtual interrupt wires for a single PCI bus.
> + * Indexed by: device*4 + INTx#.
> + */
> + struct hvm_hw_pci_irqs pci_intx;
> +
> + /* Virtual interrupt and via-link for paravirtual platform driver. */
> + uint32_t callback_via_asserted;
> + union {
> + enum {
> + HVMIRQ_callback_none,
> + HVMIRQ_callback_gsi,
> + HVMIRQ_callback_pci_intx
> + } callback_via_type;
> + };
> + union {
> + uint32_t gsi;
> + struct { uint8_t dev, intx; } pci;
> + } callback_via;
> +
> + /*
> + * Number of wires asserting each GSI.
> + *
> + * GSIs 0-15 are the ISA IRQs. ISA devices map directly into this space
> + * except ISA IRQ 0, which is connected to GSI 2.
> + * PCI links map into this space via the PCI-ISA bridge.
> + *
> + * GSIs 16+ are used only be PCI devices. The mapping from PCI device to
> + * GSI is as follows: ((device*4 + device/8 + INTx#) & 31) + 16
> + */
> + u8 gsi_assert_count[VIOAPIC_NUM_PINS];
> +
> + /*
> + * GSIs map onto PIC/IO-APIC in the usual way:
> + * 0-7: Master 8259 PIC, IO-APIC pins 0-7
> + * 8-15: Slave 8259 PIC, IO-APIC pins 8-15
> + * 16+ : IO-APIC pins 16+
> + */
> +
> + /* Last VCPU that was delivered a LowestPrio interrupt. */
> + u8 round_robin_prev_vcpu;
> +
> + struct hvm_irq_dpci *dpci;
> +};
> +
> +#define hvm_pci_intx_gsi(dev, intx) \
> + (((((dev)<<2) + ((dev)>>3) + (intx)) & 31) + 16)
> +#define hvm_pci_intx_link(dev, intx) \
> + (((dev) + (intx)) & 3)
> +
> +
> +extern u8 irq_vector[NR_IRQ_VECTORS];
> +extern int vector_irq[NR_VECTORS];
> +
> +/* Extract the IA-64 vector that corresponds to IRQ. */
> +static inline int
> +irq_to_vector (int irq)
> +{
> + return irq;
> +}
> +
> +/* Modify state of a PCI INTx wire. */
> +void hvm_pci_intx_assert(
> + struct domain *d, unsigned int device, unsigned int intx);
> +void hvm_pci_intx_deassert(
> + struct domain *d, unsigned int device, unsigned int intx);
> +
> +/* Modify state of an ISA device's IRQ wire. */
> +void hvm_isa_irq_assert(
> + struct domain *d, unsigned int isa_irq);
> +void hvm_isa_irq_deassert(
> + struct domain *d, unsigned int isa_irq);
> +
> +void hvm_set_pci_link_route(struct domain *d, u8 link, u8 isa_irq);
> +
> +void hvm_maybe_deassert_evtchn_irq(void);
> +void hvm_assert_evtchn_irq(struct vcpu *v);
> +void hvm_set_callback_via(struct domain *d, uint64_t via);
> +
> +
> +#endif /* __ASM_IA64_HVM_IRQ_H__ */
This file looks like almost same to xen/include/asm-x86/hvm/irq.h
I suppose those are arch generic because they are pci stuff.
So can those definitions be shared by x86 and ia64 with
the file. E.g. xen/include/xen/hvm/irq.h or something like that?
Or are you expecting future divergence?
> diff -r 9b227eb09263 xen/include/asm-ia64/linux/asm/hw_irq.h
> --- a/xen/include/asm-ia64/linux/asm/hw_irq.h Tue Oct 14 19:19:48 2008 +0100
> +++ b/xen/include/asm-ia64/linux/asm/hw_irq.h Wed Oct 15 17:18:25 2008 +0800
> @@ -14,6 +14,7 @@
> #include <asm/machvec.h>
> #include <asm/ptrace.h>
> #include <asm/smp.h>
> +#include <asm/hvm/irq.h>
>
> typedef u8 ia64_vector;
>
> @@ -124,13 +125,6 @@
> return irq_desc + irq;
> }
>
> -/* Extract the IA-64 vector that corresponds to IRQ. */
> -static inline ia64_vector
> -irq_to_vector (int irq)
> -{
> - return (ia64_vector) irq;
> -}
> -
> /*
> * Convert the local IA-64 vector to the corresponding irq number. This
> translation is
> * done in the context of the interrupt domain that the currently executing
> CPU belongs
Please move the file under xen/include/asm-ia64/linux-xen/asm/,
and don't forget update README.origin. Then comment out by #ifndef XEN.
> diff -r 9b227eb09263 xen/include/asm-ia64/vmx_platform.h
> --- a/xen/include/asm-ia64/vmx_platform.h Tue Oct 14 19:19:48 2008 +0100
> +++ b/xen/include/asm-ia64/vmx_platform.h Wed Oct 15 17:18:25 2008 +0800
> @@ -21,8 +21,10 @@
>
> #include <public/xen.h>
> #include <public/hvm/params.h>
> +#include <asm/hvm/irq.h>
> #include <asm/viosapic.h>
> #include <asm/hvm/vacpi.h>
> +#include <xen/hvm/iommu.h>
>
> struct vmx_ioreq_page {
> spinlock_t lock;
> @@ -41,6 +43,9 @@
> /* One IOSAPIC now... */
> struct viosapic viosapic;
> struct vacpi vacpi;
> + /* Pass-throgh VT-d */
> + struct hvm_irq irq;
> + struct hvm_iommu hvm_iommu;
> } vir_plat_t;
>
> static inline int __fls(uint32_t word)
>
--
yamahata
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