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authorPaolo Bonzini <pbonzini@redhat.com>2014-08-29 12:26:54 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2014-08-29 12:26:54 +0200
commit8d68f67b57825b4287b599df1544a4df5bbdcccb (patch)
tree88029cd6d94b5b2cdeb9a3ab2f8e4ec13fc20de9 /arch
parent0ac625df43ce9d085d4ff54c1f739611f4308b13 (diff)
parent05e0127f9e362b36aa35f17b1a3d52bca9322a3a (diff)
downloadlinux-8d68f67b57825b4287b599df1544a4df5bbdcccb.tar.bz2
Merge tag 'kvm-arm-for-v3.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
These fixes fix two issues in KVM for arm/arm64: - hyp mode initialization issues on certian boards/bootloader combos. - incorrect return address from trapped WFI/WFE instrucitons, which breaks non-linux guests.
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/kvm/handle_exit.c2
-rw-r--r--arch/arm/kvm/init.S4
-rw-r--r--arch/arm64/kvm/handle_exit.c2
-rw-r--r--arch/arm64/kvm/hyp-init.S4
4 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/kvm/handle_exit.c b/arch/arm/kvm/handle_exit.c
index 4c979d466cc1..a96a8043277c 100644
--- a/arch/arm/kvm/handle_exit.c
+++ b/arch/arm/kvm/handle_exit.c
@@ -93,6 +93,8 @@ static int kvm_handle_wfx(struct kvm_vcpu *vcpu, struct kvm_run *run)
else
kvm_vcpu_block(vcpu);
+ kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu));
+
return 1;
}
diff --git a/arch/arm/kvm/init.S b/arch/arm/kvm/init.S
index 991415d978b6..3988e72d16ff 100644
--- a/arch/arm/kvm/init.S
+++ b/arch/arm/kvm/init.S
@@ -99,6 +99,10 @@ __do_hyp_init:
mrc p15, 0, r0, c10, c2, 1
mcr p15, 4, r0, c10, c2, 1
+ @ Invalidate the stale TLBs from Bootloader
+ mcr p15, 4, r0, c8, c7, 0 @ TLBIALLH
+ dsb ish
+
@ Set the HSCTLR to:
@ - ARM/THUMB exceptions: Kernel config (Thumb-2 kernel)
@ - Endianness: Kernel config
diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c
index e28be510380c..34b8bd0711e9 100644
--- a/arch/arm64/kvm/handle_exit.c
+++ b/arch/arm64/kvm/handle_exit.c
@@ -66,6 +66,8 @@ static int kvm_handle_wfx(struct kvm_vcpu *vcpu, struct kvm_run *run)
else
kvm_vcpu_block(vcpu);
+ kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu));
+
return 1;
}
diff --git a/arch/arm64/kvm/hyp-init.S b/arch/arm64/kvm/hyp-init.S
index d968796f4b2d..c3191168a994 100644
--- a/arch/arm64/kvm/hyp-init.S
+++ b/arch/arm64/kvm/hyp-init.S
@@ -80,6 +80,10 @@ __do_hyp_init:
msr mair_el2, x4
isb
+ /* Invalidate the stale TLBs from Bootloader */
+ tlbi alle2
+ dsb sy
+
mrs x4, sctlr_el2
and x4, x4, #SCTLR_EL2_EE // preserve endianness of EL2
ldr x5, =SCTLR_EL2_FLAGS