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Message-Id: <1242818323-10413-5-git-send-email-avi@redhat.com>
Date: Wed, 20 May 2009 14:18:01 +0300
From: Avi Kivity <avi@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: kvm@...r.kernel.org
Subject: [PATCH 04/46] KVM: ia64: enable external interrupt in vmm
From: Yang Zhang <yang.zhang@...el.com>
Currently, the interrupt enable bit is cleared when in
the vmm. This patch sets the bit and the external interrupts can
be dealt with when in the vmm. This improves the I/O performance.
Signed-off-by: Yang Zhang <yang.zhang@...el.com>
Signed-off-by: Avi Kivity <avi@...hat.com>
---
arch/ia64/kvm/process.c | 5 +++++
arch/ia64/kvm/vmm_ivt.S | 18 +++++++++---------
arch/ia64/kvm/vtlb.c | 3 ++-
3 files changed, 16 insertions(+), 10 deletions(-)
diff --git a/arch/ia64/kvm/process.c b/arch/ia64/kvm/process.c
index b1dc809..a8f84da 100644
--- a/arch/ia64/kvm/process.c
+++ b/arch/ia64/kvm/process.c
@@ -652,20 +652,25 @@ void kvm_ia64_handle_break(unsigned long ifa, struct kvm_pt_regs *regs,
unsigned long isr, unsigned long iim)
{
struct kvm_vcpu *v = current_vcpu;
+ long psr;
if (ia64_psr(regs)->cpl == 0) {
/* Allow hypercalls only when cpl = 0. */
if (iim == DOMN_PAL_REQUEST) {
+ local_irq_save(psr);
set_pal_call_data(v);
vmm_transition(v);
get_pal_call_result(v);
vcpu_increment_iip(v);
+ local_irq_restore(psr);
return;
} else if (iim == DOMN_SAL_REQUEST) {
+ local_irq_save(psr);
set_sal_call_data(v);
vmm_transition(v);
get_sal_call_result(v);
vcpu_increment_iip(v);
+ local_irq_restore(psr);
return;
}
}
diff --git a/arch/ia64/kvm/vmm_ivt.S b/arch/ia64/kvm/vmm_ivt.S
index 3ef1a01..40920c6 100644
--- a/arch/ia64/kvm/vmm_ivt.S
+++ b/arch/ia64/kvm/vmm_ivt.S
@@ -95,7 +95,7 @@ GLOBAL_ENTRY(kvm_vmm_panic)
;;
srlz.i // guarantee that interruption collection is on
;;
- //(p15) ssm psr.i // restore psr.i
+ (p15) ssm psr.i // restore psr.
addl r14=@...el(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
@@ -249,7 +249,7 @@ ENTRY(kvm_break_fault)
;;
srlz.i // guarantee that interruption collection is on
;;
- //(p15)ssm psr.i // restore psr.i
+ (p15)ssm psr.i // restore psr.i
addl r14=@...el(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
@@ -439,7 +439,7 @@ kvm_dispatch_vexirq:
;;
srlz.i // guarantee that interruption collection is on
;;
- //(p15) ssm psr.i // restore psr.i
+ (p15) ssm psr.i // restore psr.i
adds r3=8,r2 // set up second base pointer
;;
KVM_SAVE_REST
@@ -819,7 +819,7 @@ ENTRY(kvm_dtlb_miss_dispatch)
;;
srlz.i // guarantee that interruption collection is on
;;
- //(p15) ssm psr.i // restore psr.i
+ (p15) ssm psr.i // restore psr.i
addl r14=@...el(ia64_leave_hypervisor_prepare),gp
;;
KVM_SAVE_REST
@@ -842,7 +842,7 @@ ENTRY(kvm_itlb_miss_dispatch)
;;
srlz.i // guarantee that interruption collection is on
;;
- //(p15) ssm psr.i // restore psr.i
+ (p15) ssm psr.i // restore psr.i
addl r14=@...el(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
@@ -871,7 +871,7 @@ ENTRY(kvm_dispatch_reflection)
;;
srlz.i // guarantee that interruption collection is on
;;
- //(p15) ssm psr.i // restore psr.i
+ (p15) ssm psr.i // restore psr.i
addl r14=@...el(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
@@ -898,7 +898,7 @@ ENTRY(kvm_dispatch_virtualization_fault)
;;
srlz.i // guarantee that interruption collection is on
;;
- //(p15) ssm psr.i // restore psr.i
+ (p15) ssm psr.i // restore psr.i
addl r14=@...el(ia64_leave_hypervisor_prepare),gp
;;
KVM_SAVE_REST
@@ -920,7 +920,7 @@ ENTRY(kvm_dispatch_interrupt)
;;
srlz.i
;;
- //(p15) ssm psr.i
+ (p15) ssm psr.i
addl r14=@...el(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
@@ -1333,7 +1333,7 @@ hostret = r24
;;
(p7) srlz.i
;;
-//(p6) ssm psr.i
+(p6) ssm psr.i
;;
mov rp=rpsave
mov ar.pfs=pfssave
diff --git a/arch/ia64/kvm/vtlb.c b/arch/ia64/kvm/vtlb.c
index 2c2501f..4290a42 100644
--- a/arch/ia64/kvm/vtlb.c
+++ b/arch/ia64/kvm/vtlb.c
@@ -254,7 +254,8 @@ u64 guest_vhpt_lookup(u64 iha, u64 *pte)
"(p7) st8 [%2]=r9;;"
"ssm psr.ic;;"
"srlz.d;;"
- /* "ssm psr.i;;" Once interrupts in vmm open, need fix*/
+ "ssm psr.i;;"
+ "srlz.d;;"
: "=r"(ret) : "r"(iha), "r"(pte):"memory");
return ret;
--
1.6.0.6
--
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