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From: Balbir Singh <bsingharora@gmail.com>
To: Paul Mackerras <paulus@ozlabs.org>
Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: [RFC][PATCH] Remove duplicate setting of the B field in tlbie
Date: Tue, 13 Sep 2016 17:45:34 +1000	[thread overview]
Message-ID: <4bbac7fd-ed99-a5c4-1bda-94345b88f18c@gmail.com> (raw)



Remove duplicate setting of the the "B" field when doing a tlbie(l).
In compute_tlbie_rb(), the "B" field is set again just before
returning the rb value to be used for tlbie(l).

Signed-off-by: Balbir Singh <bsingharora@gmail.com>
---
Quickly boot tested a VM with these changes in kvm with 64k
as the page size for the guest.

 arch/powerpc/include/asm/kvm_book3s_64.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h
index 88d17b4..63b6900 100644
--- a/arch/powerpc/include/asm/kvm_book3s_64.h
+++ b/arch/powerpc/include/asm/kvm_book3s_64.h
@@ -159,7 +159,6 @@ static inline unsigned long compute_tlbie_rb(unsigned long v, unsigned long r,
 	/* This covers 14..54 bits of va*/
 	rb = (v & ~0x7fUL) << 16;		/* AVA field */
 
-	rb |= (v >> HPTE_V_SSIZE_SHIFT) << 8;	/*  B field */
 	/*
 	 * AVA in v had cleared lower 23 bits. We need to derive
 	 * that from pteg index
-- 
2.5.5


WARNING: multiple messages have this Message-ID (diff)
From: Balbir Singh <bsingharora@gmail.com>
To: Paul Mackerras <paulus@ozlabs.org>
Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: [RFC][PATCH] Remove duplicate setting of the B field in tlbie
Date: Tue, 13 Sep 2016 07:45:34 +0000	[thread overview]
Message-ID: <4bbac7fd-ed99-a5c4-1bda-94345b88f18c@gmail.com> (raw)



Remove duplicate setting of the the "B" field when doing a tlbie(l).
In compute_tlbie_rb(), the "B" field is set again just before
returning the rb value to be used for tlbie(l).

Signed-off-by: Balbir Singh <bsingharora@gmail.com>
---
Quickly boot tested a VM with these changes in kvm with 64k
as the page size for the guest.

 arch/powerpc/include/asm/kvm_book3s_64.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h
index 88d17b4..63b6900 100644
--- a/arch/powerpc/include/asm/kvm_book3s_64.h
+++ b/arch/powerpc/include/asm/kvm_book3s_64.h
@@ -159,7 +159,6 @@ static inline unsigned long compute_tlbie_rb(unsigned long v, unsigned long r,
 	/* This covers 14..54 bits of va*/
 	rb = (v & ~0x7fUL) << 16;		/* AVA field */
 
-	rb |= (v >> HPTE_V_SSIZE_SHIFT) << 8;	/*  B field */
 	/*
 	 * AVA in v had cleared lower 23 bits. We need to derive
 	 * that from pteg index
-- 
2.5.5


             reply	other threads:[~2016-09-13  7:45 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-13  7:45 Balbir Singh [this message]
2016-09-13  7:45 ` [RFC][PATCH] Remove duplicate setting of the B field in tlbie Balbir Singh
2016-09-14  4:55 ` Aneesh Kumar K.V
2016-09-14  4:55   ` Aneesh Kumar K.V
2016-09-14  6:15   ` Balbir Singh
2016-09-14  6:15     ` Balbir Singh

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