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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] vt-d: Remap interrupt for passthru device if such HW is detected on VT-d platforms.
# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1202727101 0
# Node ID faefbf2c48408a2a59c87662a8dd7d9aaea3dfda
# Parent e3d417c4786b3fa25e09ce4be37d2ad56ea3898b
vt-d: Remap interrupt for passthru device if such HW is detected on VT-d
platforms.
Signed-off-by: Allen Kay <allen.m.kay@xxxxxxxxx>
---
xen/arch/x86/hvm/vmx/vtd/Makefile | 1
xen/arch/x86/hvm/vmx/vtd/extern.h | 7
xen/arch/x86/hvm/vmx/vtd/intel-iommu.c | 6
xen/arch/x86/hvm/vmx/vtd/intremap.c | 340 +++++++++++++++++++++++++++++++++
xen/include/asm-x86/io_apic.h | 5
xen/include/asm-x86/iommu.h | 4
6 files changed, 356 insertions(+), 7 deletions(-)
diff -r e3d417c4786b -r faefbf2c4840 xen/arch/x86/hvm/vmx/vtd/Makefile
--- a/xen/arch/x86/hvm/vmx/vtd/Makefile Mon Feb 11 10:50:57 2008 +0000
+++ b/xen/arch/x86/hvm/vmx/vtd/Makefile Mon Feb 11 10:51:41 2008 +0000
@@ -3,3 +3,4 @@ obj-y += utils.o
obj-y += utils.o
obj-y += io.o
obj-y += qinval.o
+obj-y += intremap.o
diff -r e3d417c4786b -r faefbf2c4840 xen/arch/x86/hvm/vmx/vtd/extern.h
--- a/xen/arch/x86/hvm/vmx/vtd/extern.h Mon Feb 11 10:50:57 2008 +0000
+++ b/xen/arch/x86/hvm/vmx/vtd/extern.h Mon Feb 11 10:51:41 2008 +0000
@@ -23,11 +23,6 @@
#include "dmar.h"
-extern int iommu_setup_done;
-extern int vtd2_thurley_enabled;
-extern int vtd2_qinval_enabled;
-
-extern spinlock_t ioapic_lock;
extern struct qi_ctrl *qi_ctrl;
extern struct ir_ctrl *ir_ctrl;
@@ -37,6 +32,7 @@ void pdev_flr(u8 bus, u8 devfn);
void pdev_flr(u8 bus, u8 devfn);
int qinval_setup(struct iommu *iommu);
+int intremap_setup(struct iommu *iommu);
int queue_invalidate_context(struct iommu *iommu,
u16 did, u16 source_id, u8 function_mask, u8 granu);
int queue_invalidate_iotlb(struct iommu *iommu,
@@ -46,7 +42,6 @@ int invalidate_sync(struct iommu *iommu)
int invalidate_sync(struct iommu *iommu);
int iommu_flush_iec_global(struct iommu *iommu);
int iommu_flush_iec_index(struct iommu *iommu, u8 im, u16 iidx);
-void gsi_remapping(unsigned int gsi);
void print_iommu_regs(struct acpi_drhd_unit *drhd);
int vtd_hw_check(void);
struct iommu * ioapic_to_iommu(unsigned int apic_id);
diff -r e3d417c4786b -r faefbf2c4840 xen/arch/x86/hvm/vmx/vtd/intel-iommu.c
--- a/xen/arch/x86/hvm/vmx/vtd/intel-iommu.c Mon Feb 11 10:50:57 2008 +0000
+++ b/xen/arch/x86/hvm/vmx/vtd/intel-iommu.c Mon Feb 11 10:51:41 2008 +0000
@@ -1816,9 +1816,13 @@ static int init_vtd_hw(void)
flush->context = flush_context_reg;
flush->iotlb = flush_iotlb_reg;
- if ( qinval_setup(iommu) != 0);
+ if ( qinval_setup(iommu) != 0 )
dprintk(XENLOG_ERR VTDPREFIX,
"Queued Invalidation hardware not found\n");
+
+ if ( intremap_setup(iommu) != 0 )
+ dprintk(XENLOG_ERR VTDPREFIX,
+ "Interrupt Remapping hardware not found\n");
}
return 0;
}
diff -r e3d417c4786b -r faefbf2c4840 xen/arch/x86/hvm/vmx/vtd/intremap.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/arch/x86/hvm/vmx/vtd/intremap.c Mon Feb 11 10:51:41 2008 +0000
@@ -0,0 +1,340 @@
+/*
+ * Copyright (c) 2006, Intel Corporation.
+ *
+ * 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.
+ *
+ * Copyright (C) Allen Kay <allen.m.kay@xxxxxxxxx>
+ * Copyright (C) Xiaohui Xin <xiaohui.xin@xxxxxxxxx>
+ */
+
+#include <xen/config.h>
+#include <xen/lib.h>
+#include <xen/init.h>
+#include <xen/irq.h>
+#include <xen/delay.h>
+#include <xen/sched.h>
+#include <xen/acpi.h>
+#include <xen/keyhandler.h>
+#include <xen/spinlock.h>
+#include <asm/io.h>
+#include <asm/mc146818rtc.h>
+#include <asm/smp.h>
+#include <asm/desc.h>
+#include <mach_apic.h>
+#include <io_ports.h>
+
+#include <xen/spinlock.h>
+#include <xen/xmalloc.h>
+#include <xen/domain_page.h>
+#include <asm/delay.h>
+#include <asm/string.h>
+#include <asm/iommu.h>
+#include <asm/hvm/vmx/intel-iommu.h>
+#include "dmar.h"
+#include "vtd.h"
+#include "pci-direct.h"
+#include "pci_regs.h"
+#include "msi.h"
+#include "extern.h"
+
+u16 apicid_to_bdf(int apic_id)
+{
+ struct acpi_drhd_unit *drhd = ioapic_to_drhd(apic_id);
+ struct acpi_ioapic_unit *acpi_ioapic_unit;
+
+ list_for_each_entry ( acpi_ioapic_unit, &drhd->ioapic_list, list )
+ if ( acpi_ioapic_unit->apic_id == apic_id )
+ return acpi_ioapic_unit->ioapic.info;
+
+ dprintk(XENLOG_ERR VTDPREFIX, "Didn't find the bdf for the apic_id!\n");
+ return 0;
+}
+
+static void remap_entry_to_ioapic_rte(
+ struct iommu *iommu, struct IO_APIC_route_entry *old_rte)
+{
+ struct iremap_entry *iremap_entry = NULL;
+ struct IO_APIC_route_remap_entry *remap_rte;
+ unsigned int index;
+ unsigned long flags;
+ struct ir_ctrl *ir_ctrl = iommu_ir_ctrl(iommu);
+
+ if ( ir_ctrl == NULL )
+ {
+ dprintk(XENLOG_ERR VTDPREFIX,
+ "remap_entry_to_ioapic_rte: ir_ctl == NULL");
+ return;
+ }
+
+ remap_rte = (struct IO_APIC_route_remap_entry *) old_rte;
+ index = (remap_rte->index_15 << 15) + remap_rte->index_0_14;
+
+ if ( index > ir_ctrl->iremap_index )
+ {
+ dprintk(XENLOG_ERR VTDPREFIX,
+ "Index is larger than remap table entry size. Error!\n");
+ return;
+ }
+
+ spin_lock_irqsave(&ir_ctrl->iremap_lock, flags);
+
+ iremap_entry = &ir_ctrl->iremap[index];
+
+ old_rte->vector = iremap_entry->lo.vector;
+ old_rte->delivery_mode = iremap_entry->lo.dlm;
+ old_rte->dest_mode = iremap_entry->lo.dm;
+ old_rte->trigger = iremap_entry->lo.tm;
+ old_rte->__reserved_2 = 0;
+ old_rte->dest.logical.__reserved_1 = 0;
+ old_rte->dest.logical.logical_dest = iremap_entry->lo.dst;
+
+ spin_unlock_irqrestore(&ir_ctrl->iremap_lock, flags);
+}
+
+static void ioapic_rte_to_remap_entry(struct iommu *iommu,
+ int apic_id, struct IO_APIC_route_entry *old_rte)
+{
+ struct iremap_entry *iremap_entry = NULL;
+ struct IO_APIC_route_remap_entry *remap_rte;
+ unsigned int index;
+ unsigned long flags;
+ int ret = 0;
+ struct ir_ctrl *ir_ctrl = iommu_ir_ctrl(iommu);
+
+ remap_rte = (struct IO_APIC_route_remap_entry *) old_rte;
+ spin_lock_irqsave(&ir_ctrl->iremap_lock, flags);
+ index = ir_ctrl->iremap_index;
+ if ( index > IREMAP_ENTRY_NR - 1 )
+ {
+ dprintk(XENLOG_ERR VTDPREFIX,
+ "The interrupt number is more than 256!\n");
+ goto out;
+ }
+
+ iremap_entry = &(ir_ctrl->iremap[index]);
+ if ( *(u64 *)iremap_entry != 0 )
+ dprintk(XENLOG_WARNING VTDPREFIX,
+ "Interrupt remapping entry is in use already!\n");
+ iremap_entry->lo.fpd = 0;
+ iremap_entry->lo.dm = old_rte->dest_mode;
+ iremap_entry->lo.rh = 0;
+ iremap_entry->lo.tm = old_rte->trigger;
+ iremap_entry->lo.dlm = old_rte->delivery_mode;
+ iremap_entry->lo.avail = 0;
+ iremap_entry->lo.res_1 = 0;
+ iremap_entry->lo.vector = old_rte->vector;
+ iremap_entry->lo.res_2 = 0;
+ iremap_entry->lo.dst = (old_rte->dest.logical.logical_dest << 8);
+ iremap_entry->hi.sid = apicid_to_bdf(apic_id);
+ iremap_entry->hi.sq = 0; /* comparing all 16-bit of SID */
+ iremap_entry->hi.svt = 1; /* turn on requestor ID verification SID/SQ */
+ iremap_entry->hi.res_1 = 0;
+ iremap_entry->lo.p = 1; /* finally, set present bit */
+ ir_ctrl->iremap_index++;
+
+ iommu_flush_iec_index(iommu, 0, index);
+ ret = invalidate_sync(iommu);
+
+ /* now construct new ioapic rte entry */
+ remap_rte->vector = old_rte->vector;
+ remap_rte->delivery_mode = 0; /* has to be 0 for remap format */
+ remap_rte->index_15 = index & 0x8000;
+ remap_rte->index_0_14 = index & 0x7fff;
+ remap_rte->delivery_status = old_rte->delivery_status;
+ remap_rte->polarity = old_rte->polarity;
+ remap_rte->irr = old_rte->irr;
+ remap_rte->trigger = old_rte->trigger;
+ remap_rte->mask = 1;
+ remap_rte->reserved = 0;
+ remap_rte->format = 1; /* indicate remap format */
+out:
+ spin_unlock_irqrestore(&ir_ctrl->iremap_lock, flags);
+ return;
+}
+
+unsigned int
+io_apic_read_remap_rte(
+ unsigned int apic, unsigned int reg)
+{
+ struct IO_APIC_route_entry old_rte = { 0 };
+ struct IO_APIC_route_remap_entry *remap_rte;
+ int rte_upper = (reg & 1) ? 1 : 0;
+ struct iommu *iommu = ioapic_to_iommu(mp_ioapics[apic].mpc_apicid);
+ struct ir_ctrl *ir_ctrl = iommu_ir_ctrl(iommu);
+
+ if ( !iommu || !(ir_ctrl->iremap) )
+ {
+ *IO_APIC_BASE(apic) = reg;
+ return *(IO_APIC_BASE(apic)+4);
+ }
+
+ if ( rte_upper )
+ reg--;
+
+ /* read lower and upper 32-bits of rte entry */
+ *IO_APIC_BASE(apic) = reg;
+ *(((u32 *)&old_rte) + 0) = *(IO_APIC_BASE(apic)+4);
+ *IO_APIC_BASE(apic) = reg + 1;
+ *(((u32 *)&old_rte) + 1) = *(IO_APIC_BASE(apic)+4);
+
+ remap_rte = (struct IO_APIC_route_remap_entry *) &old_rte;
+
+ if ( remap_rte->mask || (remap_rte->format == 0) )
+ {
+ *IO_APIC_BASE(apic) = reg;
+ return *(IO_APIC_BASE(apic)+4);
+ }
+
+ remap_entry_to_ioapic_rte(iommu, &old_rte);
+ if ( rte_upper )
+ {
+ *IO_APIC_BASE(apic) = reg + 1;
+ return (*(((u32 *)&old_rte) + 1));
+ }
+ else
+ {
+ *IO_APIC_BASE(apic) = reg;
+ return (*(((u32 *)&old_rte) + 0));
+ }
+}
+
+void
+io_apic_write_remap_rte(
+ unsigned int apic, unsigned int reg, unsigned int value)
+{
+ struct IO_APIC_route_entry old_rte = { 0 };
+ struct IO_APIC_route_remap_entry *remap_rte;
+ int rte_upper = (reg & 1) ? 1 : 0;
+ struct iommu *iommu = ioapic_to_iommu(mp_ioapics[apic].mpc_apicid);
+ struct ir_ctrl *ir_ctrl = iommu_ir_ctrl(iommu);
+
+ if ( !iommu || !(ir_ctrl->iremap) )
+ {
+ *IO_APIC_BASE(apic) = reg;
+ *(IO_APIC_BASE(apic)+4) = value;
+ return;
+ }
+
+ if ( rte_upper )
+ reg--;
+
+ /* read both lower and upper 32-bits of rte entry */
+ *IO_APIC_BASE(apic) = reg;
+ *(((u32 *)&old_rte) + 0) = *(IO_APIC_BASE(apic)+4);
+ *IO_APIC_BASE(apic) = reg + 1;
+ *(((u32 *)&old_rte) + 1) = *(IO_APIC_BASE(apic)+4);
+
+ remap_rte = (struct IO_APIC_route_remap_entry *) &old_rte;
+ if ( remap_rte->mask || (remap_rte->format == 0) )
+ {
+ *IO_APIC_BASE(apic) = rte_upper ? ++reg : reg;
+ *(IO_APIC_BASE(apic)+4) = value;
+ return;
+ }
+
+ *(((u32 *)&old_rte) + rte_upper) = value;
+ ioapic_rte_to_remap_entry(iommu, mp_ioapics[apic].mpc_apicid, &old_rte);
+
+ /* write new entry to ioapic */
+ *IO_APIC_BASE(apic) = reg;
+ *(IO_APIC_BASE(apic)+4) = *(((int *)&old_rte)+0);
+ *IO_APIC_BASE(apic) = reg + 1;
+ *(IO_APIC_BASE(apic)+4) = *(((int *)&old_rte)+1);
+}
+
+int intremap_setup(struct iommu *iommu)
+{
+ struct ir_ctrl *ir_ctrl;
+ unsigned long start_time;
+ u64 paddr;
+
+ if ( !ecap_intr_remap(iommu->ecap) )
+ return -ENODEV;
+
+ ir_ctrl = iommu_ir_ctrl(iommu);
+ if ( ir_ctrl->iremap == NULL )
+ {
+ ir_ctrl->iremap = alloc_xenheap_page();
+ if ( ir_ctrl->iremap == NULL )
+ {
+ dprintk(XENLOG_WARNING VTDPREFIX,
+ "Cannot allocate memory for ir_ctrl->iremap\n");
+ return -ENODEV;
+ }
+ memset(ir_ctrl->iremap, 0, PAGE_SIZE);
+ }
+
+ paddr = virt_to_maddr(ir_ctrl->iremap);
+#if defined(ENABLED_EXTENDED_INTERRUPT_SUPPORT)
+ /* set extended interrupt mode bit */
+ paddr |= ecap_ext_intr(iommu->ecap) ? (1 << IRTA_REG_EIMI_SHIFT) : 0;
+#endif
+ /* size field = 256 entries per 4K page = 8 - 1 */
+ paddr |= 7;
+ dmar_writeq(iommu->reg, DMAR_IRTA_REG, paddr);
+
+ /* set SIRTP */
+ iommu->gcmd |= DMA_GCMD_SIRTP;
+ dmar_writel(iommu->reg, DMAR_GCMD_REG, iommu->gcmd);
+
+ /* Make sure hardware complete it */
+ start_time = jiffies;
+ while ( !(dmar_readl(iommu->reg, DMAR_GSTS_REG) & DMA_GSTS_SIRTPS) )
+ {
+ if ( time_after(jiffies, start_time + DMAR_OPERATION_TIMEOUT) )
+ {
+ dprintk(XENLOG_ERR VTDPREFIX,
+ "Cannot set SIRTP field for interrupt remapping\n");
+ return -ENODEV;
+ }
+ cpu_relax();
+ }
+
+ /* enable comaptiblity format interrupt pass through */
+ iommu->gcmd |= DMA_GCMD_CFI;
+ dmar_writel(iommu->reg, DMAR_GCMD_REG, iommu->gcmd);
+
+ start_time = jiffies;
+ while ( !(dmar_readl(iommu->reg, DMAR_GSTS_REG) & DMA_GSTS_CFIS) )
+ {
+ if ( time_after(jiffies, start_time + DMAR_OPERATION_TIMEOUT) )
+ {
+ dprintk(XENLOG_ERR VTDPREFIX,
+ "Cannot set CFI field for interrupt remapping\n");
+ return -ENODEV;
+ }
+ cpu_relax();
+ }
+
+ /* enable interrupt remapping hardware */
+ iommu->gcmd |= DMA_GCMD_IRE;
+ dmar_writel(iommu->reg, DMAR_GCMD_REG, iommu->gcmd);
+
+ start_time = jiffies;
+ while ( !(dmar_readl(iommu->reg, DMAR_GSTS_REG) & DMA_GSTS_IRES) )
+ {
+ if ( time_after(jiffies, start_time + DMAR_OPERATION_TIMEOUT) )
+ {
+ dprintk(XENLOG_ERR VTDPREFIX,
+ "Cannot set IRE field for interrupt remapping\n");
+ return -ENODEV;
+ }
+ cpu_relax();
+ }
+
+ /* After set SIRTP, we should do globally invalidate the IEC */
+ iommu_flush_iec_global(iommu);
+
+ return 0;
+}
diff -r e3d417c4786b -r faefbf2c4840 xen/include/asm-x86/io_apic.h
--- a/xen/include/asm-x86/io_apic.h Mon Feb 11 10:50:57 2008 +0000
+++ b/xen/include/asm-x86/io_apic.h Mon Feb 11 10:51:41 2008 +0000
@@ -6,6 +6,7 @@
#include <asm/mpspec.h>
#include <asm/apicdef.h>
#include <asm/fixmap.h>
+#include <asm/iommu.h>
/*
* Intel IO-APIC support for SMP and UP systems.
@@ -124,12 +125,16 @@ extern int mpc_default_type;
static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
{
+ if (vtd_enabled)
+ return io_apic_read_remap_rte(apic, reg);
*IO_APIC_BASE(apic) = reg;
return *(IO_APIC_BASE(apic)+4);
}
static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned
int value)
{
+ if (vtd_enabled)
+ return io_apic_write_remap_rte(apic, reg, value);
*IO_APIC_BASE(apic) = reg;
*(IO_APIC_BASE(apic)+4) = value;
}
diff -r e3d417c4786b -r faefbf2c4840 xen/include/asm-x86/iommu.h
--- a/xen/include/asm-x86/iommu.h Mon Feb 11 10:50:57 2008 +0000
+++ b/xen/include/asm-x86/iommu.h Mon Feb 11 10:51:41 2008 +0000
@@ -81,6 +81,10 @@ int dpci_ioport_intercept(ioreq_t *p);
int dpci_ioport_intercept(ioreq_t *p);
int pt_irq_create_bind_vtd(struct domain *d,
xen_domctl_bind_pt_irq_t *pt_irq_bind);
+unsigned int io_apic_read_remap_rte(
+ unsigned int apic, unsigned int reg);
+void io_apic_write_remap_rte(unsigned int apic,
+ unsigned int reg, unsigned int value);
#define PT_IRQ_TIME_OUT MILLISECS(8)
#define VTDPREFIX "[VT-D]"
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