Mailing List Archive

# HG changeset patch
# User kfraser@localhost.localdomain
# Date 1187103496 -3600
# Node ID e9a5c6b2acbe98d7a2d60da447a437a62eef94ea
# Parent ef79bf6f0142142003681052f925ad8f85b26ab5
xen: Cache 'current' vcpu in physdev_op hcall implementation.
Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
---
xen/arch/x86/physdev.c | 19 ++++++++++---------
1 files changed, 10 insertions(+), 9 deletions(-)

diff -r ef79bf6f0142 -r e9a5c6b2acbe xen/arch/x86/physdev.c
--- a/xen/arch/x86/physdev.c Tue Aug 14 09:56:46 2007 +0100
+++ b/xen/arch/x86/physdev.c Tue Aug 14 15:58:16 2007 +0100
@@ -28,6 +28,7 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H
{
int irq;
ret_t ret;
+ struct vcpu *v = current;

switch ( cmd )
{
@@ -36,13 +37,13 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H
ret = -EFAULT;
if ( copy_from_guest(&eoi, arg, 1) != 0 )
break;
- ret = pirq_guest_eoi(current->domain, eoi.irq);
+ ret = pirq_guest_eoi(v->domain, eoi.irq);
break;
}

/* Legacy since 0x00030202. */
case PHYSDEVOP_IRQ_UNMASK_NOTIFY: {
- ret = pirq_guest_unmask(current->domain);
+ ret = pirq_guest_unmask(v->domain);
break;
}

@@ -70,7 +71,7 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H
if ( copy_from_guest(&apic, arg, 1) != 0 )
break;
ret = -EPERM;
- if ( !IS_PRIV(current->domain) )
+ if ( !IS_PRIV(v->domain) )
break;
ret = ioapic_guest_read(apic.apic_physbase, apic.reg, &apic.value);
if ( copy_to_guest(arg, &apic, 1) != 0 )
@@ -84,7 +85,7 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H
if ( copy_from_guest(&apic, arg, 1) != 0 )
break;
ret = -EPERM;
- if ( !IS_PRIV(current->domain) )
+ if ( !IS_PRIV(v->domain) )
break;
ret = ioapic_guest_write(apic.apic_physbase, apic.reg, apic.value);
break;
@@ -98,7 +99,7 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H
break;

ret = -EPERM;
- if ( !IS_PRIV(current->domain) )
+ if ( !IS_PRIV(v->domain) )
break;

irq = irq_op.irq;
@@ -120,7 +121,7 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H
if ( set_iopl.iopl > 3 )
break;
ret = 0;
- current->arch.iopl = set_iopl.iopl;
+ v->arch.iopl = set_iopl.iopl;
break;
}

@@ -135,11 +136,11 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H
break;
ret = 0;
#ifndef COMPAT
- current->arch.iobmp = set_iobitmap.bitmap;
+ v->arch.iobmp = set_iobitmap.bitmap;
#else
- guest_from_compat_handle(current->arch.iobmp, set_iobitmap.bitmap);
+ guest_from_compat_handle(v->arch.iobmp, set_iobitmap.bitmap);
#endif
- current->arch.iobmp_limit = set_iobitmap.nr_ports;
+ v->arch.iobmp_limit = set_iobitmap.nr_ports;
break;
}


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