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From: Gleb Natapov <gleb@redhat.com>
To: kvm@vger.kernel.org
Cc: avi@redhat.com, mtosatti@redhat.com
Subject: [PATCHv3 3/5] KVM: emulator: move some address manipulation function out of emulator code.
Date: Thu, 12 Jul 2012 14:56:39 +0300	[thread overview]
Message-ID: <1342094201-12167-4-git-send-email-gleb@redhat.com> (raw)
In-Reply-To: <1342094201-12167-1-git-send-email-gleb@redhat.com>

The functions will be used outside of the emulator.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
---
 arch/x86/include/asm/kvm_host.h |   25 +++++++++++++++++++++++++
 arch/x86/kvm/emulate.c          |   15 ++-------------
 2 files changed, 27 insertions(+), 13 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index de2aff8..6212575 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -980,4 +980,29 @@ int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
 void kvm_handle_pmu_event(struct kvm_vcpu *vcpu);
 void kvm_deliver_pmi(struct kvm_vcpu *vcpu);
 
+static inline unsigned long kvm_ad_mask(u8 ad_bytes)
+{
+	return (1UL << (ad_bytes << 3)) - 1;
+}
+
+/* Access/update address held in a register, based on addressing mode. */
+static inline unsigned long
+kvm_address_mask(u8 ad_bytes, unsigned long reg)
+{
+	if (ad_bytes == sizeof(unsigned long))
+		return reg;
+	else
+		return reg & kvm_ad_mask(ad_bytes);
+}
+
+static inline void
+kvm_register_address_increment(u8 ad_bytes, unsigned long *reg, int inc)
+{
+	if (ad_bytes == sizeof(unsigned long))
+		*reg += inc;
+	else
+		*reg = (*reg & ~kvm_ad_mask(ad_bytes)) |
+			((*reg + inc) & kvm_ad_mask(ad_bytes));
+}
+
 #endif /* _ASM_X86_KVM_HOST_H */
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 79899df..e317588 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -433,19 +433,11 @@ static int emulator_check_intercept(struct x86_emulate_ctxt *ctxt,
 	return ctxt->ops->intercept(ctxt, &info, stage);
 }
 
-static inline unsigned long ad_mask(struct x86_emulate_ctxt *ctxt)
-{
-	return (1UL << (ctxt->ad_bytes << 3)) - 1;
-}
-
 /* Access/update address held in a register, based on addressing mode. */
 static inline unsigned long
 address_mask(struct x86_emulate_ctxt *ctxt, unsigned long reg)
 {
-	if (ctxt->ad_bytes == sizeof(unsigned long))
-		return reg;
-	else
-		return reg & ad_mask(ctxt);
+	return kvm_address_mask(ctxt->ad_bytes, reg);
 }
 
 static inline unsigned long
@@ -457,10 +449,7 @@ register_address(struct x86_emulate_ctxt *ctxt, unsigned long reg)
 static inline void
 register_address_increment(struct x86_emulate_ctxt *ctxt, unsigned long *reg, int inc)
 {
-	if (ctxt->ad_bytes == sizeof(unsigned long))
-		*reg += inc;
-	else
-		*reg = (*reg & ~ad_mask(ctxt)) | ((*reg + inc) & ad_mask(ctxt));
+	return kvm_register_address_increment(ctxt->ad_bytes, reg, inc);
 }
 
 static inline void jmp_rel(struct x86_emulate_ctxt *ctxt, int rel)
-- 
1.7.10


  parent reply	other threads:[~2012-07-12 11:57 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-12 11:56 [PATCHv3 0/5] improve speed of "rep ins" emulation Gleb Natapov
2012-07-12 11:56 ` [PATCHv3 1/5] KVM: Provide userspace IO exit completion callback Gleb Natapov
2012-07-12 11:56 ` [PATCHv3 2/5] KVM: emulator: make x86 emulation modes enum instead of defines Gleb Natapov
2012-07-12 11:56 ` Gleb Natapov [this message]
2012-07-12 11:56 ` [PATCHv3 4/5] KVM: emulator: make linearize() callable from outside of emulator Gleb Natapov
2012-07-12 11:56 ` [PATCHv3 5/5] KVM: Provide fast path for "rep ins" emulation if possible Gleb Natapov
2012-07-19  7:34 ` [PATCHv3 0/5] improve speed of "rep ins" emulation Gleb Natapov

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