This is a note to let you know that I've just added the patch titled
KVM: s390: split kvm_s390_logical_to_effective
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kvm-s390-split-kvm_s390_logical_to_effective.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f85f1baaa18932a041fd2b1c2ca6cfd9898c7d2b Mon Sep 17 00:00:00 2001
From: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
Date: Tue, 2 Mar 2021 13:36:44 +0100
Subject: KVM: s390: split kvm_s390_logical_to_effective
From: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
commit f85f1baaa18932a041fd2b1c2ca6cfd9898c7d2b upstream.
Split kvm_s390_logical_to_effective to a generic function called
_kvm_s390_logical_to_effective. The new function takes a PSW and an address
and returns the address with the appropriate bits masked off. The old
function now calls the new function with the appropriate PSW from the vCPU.
This is needed to avoid code duplication for vSIE.
Signed-off-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
Reviewed-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # for VSIE: correctly handle MVPG when in VSIE
Link: https://lore.kernel.org/r/20210302174443.514363-2-imbrenda@xxxxxxxxxxxxx
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/s390/kvm/gaccess.h | 31 ++++++++++++++++++++++++-------
1 file changed, 24 insertions(+), 7 deletions(-)
--- a/arch/s390/kvm/gaccess.h
+++ b/arch/s390/kvm/gaccess.h
@@ -37,6 +37,29 @@ static inline unsigned long kvm_s390_rea
}
/**
+ * _kvm_s390_logical_to_effective - convert guest logical to effective address
+ * @psw: psw of the guest
+ * @ga: guest logical address
+ *
+ * Convert a guest logical address to an effective address by applying the
+ * rules of the addressing mode defined by bits 31 and 32 of the given PSW
+ * (extendended/basic addressing mode).
+ *
+ * Depending on the addressing mode, the upper 40 bits (24 bit addressing
+ * mode), 33 bits (31 bit addressing mode) or no bits (64 bit addressing
+ * mode) of @ga will be zeroed and the remaining bits will be returned.
+ */
+static inline unsigned long _kvm_s390_logical_to_effective(psw_t *psw,
+ unsigned long ga)
+{
+ if (psw_bits(*psw).eaba == PSW_BITS_AMODE_64BIT)
+ return ga;
+ if (psw_bits(*psw).eaba == PSW_BITS_AMODE_31BIT)
+ return ga & ((1UL << 31) - 1);
+ return ga & ((1UL << 24) - 1);
+}
+
+/**
* kvm_s390_logical_to_effective - convert guest logical to effective address
* @vcpu: guest virtual cpu
* @ga: guest logical address
@@ -52,13 +75,7 @@ static inline unsigned long kvm_s390_rea
static inline unsigned long kvm_s390_logical_to_effective(struct kvm_vcpu *vcpu,
unsigned long ga)
{
- psw_t *psw = &vcpu->arch.sie_block->gpsw;
-
- if (psw_bits(*psw).eaba == PSW_BITS_AMODE_64BIT)
- return ga;
- if (psw_bits(*psw).eaba == PSW_BITS_AMODE_31BIT)
- return ga & ((1UL << 31) - 1);
- return ga & ((1UL << 24) - 1);
+ return _kvm_s390_logical_to_effective(&vcpu->arch.sie_block->gpsw, ga);
}
/*
Patches currently in stable-queue which might be from imbrenda@xxxxxxxxxxxxx are
queue-4.19/kvm-s390-vsie-fix-mvpg-handling-for-prefixing-and-mso.patch
queue-4.19/kvm-s390-vsie-correctly-handle-mvpg-when-in-vsie.patch
queue-4.19/kvm-s390-split-kvm_s390_real_to_abs.patch
queue-4.19/kvm-s390-split-kvm_s390_logical_to_effective.patch
queue-4.19/kvm-s390-extend-kvm_s390_shadow_fault-to-return-entry-pointer.patch
