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Date: Tue, 07 Dec 2010 10:48:06 +0800
From: Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To: Avi Kivity <avi@...hat.com>
CC: Marcelo Tosatti <mtosatti@...hat.com>,
Gleb Natapov <gleb@...hat.com>,
LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH v5 1/3] KVM: MMU: rename 'no_apf' to 'prefault'
On 12/07/2010 10:33 AM, Xiao Guangrong wrote:
> It's the speculative path if 'no_apf = 1' and we will specially handle this
> speculative path in the later patch, so 'prefault' is better to fit the sense
>
> Signed-off-by: Xiao Guangrong <xiaoguangrong@...fujitsu.com>
> ---
> arch/x86/include/asm/kvm_host.h | 3 ++-
> arch/x86/kvm/mmu.c | 18 +++++++++---------
> arch/x86/kvm/paging_tmpl.h | 4 ++--
> 3 files changed, 13 insertions(+), 12 deletions(-)
>
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index cfbcbfa..6dae67e 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -241,7 +241,8 @@ struct kvm_mmu {
> void (*new_cr3)(struct kvm_vcpu *vcpu);
> void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root);
> unsigned long (*get_cr3)(struct kvm_vcpu *vcpu);
> - int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err, bool no_apf);
> + int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err,
> + bool prefoult);
Sorry for the noise, there is a typo, resent it.
Subject: [PATCH v5 1/3] KVM: MMU: rename 'no_apf' to 'prefault'
It's the speculative path if 'no_apf = 1' and we will specially handle this
speculative path in the later patch, so 'prefault' is better to fit the sense
Signed-off-by: Xiao Guangrong <xiaoguangrong@...fujitsu.com>
---
arch/x86/include/asm/kvm_host.h | 3 ++-
arch/x86/kvm/mmu.c | 18 +++++++++---------
arch/x86/kvm/paging_tmpl.h | 4 ++--
3 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index cfbcbfa..6dae67e 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -241,7 +241,8 @@ struct kvm_mmu {
void (*new_cr3)(struct kvm_vcpu *vcpu);
void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root);
unsigned long (*get_cr3)(struct kvm_vcpu *vcpu);
- int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err, bool no_apf);
+ int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err,
+ bool prefault);
void (*inject_page_fault)(struct kvm_vcpu *vcpu,
struct x86_exception *fault);
void (*free)(struct kvm_vcpu *vcpu);
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index d75ba1e..4954de9 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2284,11 +2284,11 @@ static int kvm_handle_bad_page(struct kvm *kvm, gfn_t gfn, pfn_t pfn)
return 1;
}
-static bool try_async_pf(struct kvm_vcpu *vcpu, bool no_apf, gfn_t gfn,
+static bool try_async_pf(struct kvm_vcpu *vcpu, bool prefault, gfn_t gfn,
gva_t gva, pfn_t *pfn, bool write, bool *writable);
static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, int write, gfn_t gfn,
- bool no_apf)
+ bool prefault)
{
int r;
int level;
@@ -2310,7 +2310,7 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, int write, gfn_t gfn,
mmu_seq = vcpu->kvm->mmu_notifier_seq;
smp_rmb();
- if (try_async_pf(vcpu, no_apf, gfn, v, &pfn, write, &map_writable))
+ if (try_async_pf(vcpu, prefault, gfn, v, &pfn, write, &map_writable))
return 0;
/* mmio */
@@ -2583,7 +2583,7 @@ static gpa_t nonpaging_gva_to_gpa_nested(struct kvm_vcpu *vcpu, gva_t vaddr,
}
static int nonpaging_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
- u32 error_code, bool no_apf)
+ u32 error_code, bool prefault)
{
gfn_t gfn;
int r;
@@ -2599,7 +2599,7 @@ static int nonpaging_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
gfn = gva >> PAGE_SHIFT;
return nonpaging_map(vcpu, gva & PAGE_MASK,
- error_code & PFERR_WRITE_MASK, gfn, no_apf);
+ error_code & PFERR_WRITE_MASK, gfn, prefault);
}
static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn)
@@ -2621,7 +2621,7 @@ static bool can_do_async_pf(struct kvm_vcpu *vcpu)
return kvm_x86_ops->interrupt_allowed(vcpu);
}
-static bool try_async_pf(struct kvm_vcpu *vcpu, bool no_apf, gfn_t gfn,
+static bool try_async_pf(struct kvm_vcpu *vcpu, bool prefault, gfn_t gfn,
gva_t gva, pfn_t *pfn, bool write, bool *writable)
{
bool async;
@@ -2633,7 +2633,7 @@ static bool try_async_pf(struct kvm_vcpu *vcpu, bool no_apf, gfn_t gfn,
put_page(pfn_to_page(*pfn));
- if (!no_apf && can_do_async_pf(vcpu)) {
+ if (!prefault && can_do_async_pf(vcpu)) {
trace_kvm_try_async_get_page(gva, gfn);
if (kvm_find_async_pf_gfn(vcpu, gfn)) {
trace_kvm_async_pf_doublefault(gva, gfn);
@@ -2649,7 +2649,7 @@ static bool try_async_pf(struct kvm_vcpu *vcpu, bool no_apf, gfn_t gfn,
}
static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t gpa, u32 error_code,
- bool no_apf)
+ bool prefault)
{
pfn_t pfn;
int r;
@@ -2673,7 +2673,7 @@ static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t gpa, u32 error_code,
mmu_seq = vcpu->kvm->mmu_notifier_seq;
smp_rmb();
- if (try_async_pf(vcpu, no_apf, gfn, gpa, &pfn, write, &map_writable))
+ if (try_async_pf(vcpu, prefault, gfn, gpa, &pfn, write, &map_writable))
return 0;
/* mmio */
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index d5a0a11..52b3e91 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -539,7 +539,7 @@ out_gpte_changed:
* a negative value on error.
*/
static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code,
- bool no_apf)
+ bool prefault)
{
int write_fault = error_code & PFERR_WRITE_MASK;
int user_fault = error_code & PFERR_USER_MASK;
@@ -581,7 +581,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code,
mmu_seq = vcpu->kvm->mmu_notifier_seq;
smp_rmb();
- if (try_async_pf(vcpu, no_apf, walker.gfn, addr, &pfn, write_fault,
+ if (try_async_pf(vcpu, prefault, walker.gfn, addr, &pfn, write_fault,
&map_writable))
return 0;
--
1.7.0.4
--
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