March 2018 - Linux-stable-mirror

FAILED: patch "[PATCH] KVM: arm/arm64: Avoid vcpu_load for other vcpu ioctls than" failed to apply to 4.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From e21a4f3a930cda6e4902cb5b3213365e5ff3ce7c Mon Sep 17 00:00:00 2001 From: Christoffer Dall <christoffer.dall(a)linaro.org> Date: Tue, 27 Feb 2018 12:33:50 +0100 Subject: [PATCH] KVM: arm/arm64: Avoid vcpu_load for other vcpu ioctls than KVM_RUN Calling vcpu_load() registers preempt notifiers for this vcpu and calls kvm_arch_vcpu_load(). The latter will soon be doing a lot of heavy lifting on arm/arm64 and will try to do things such as enabling the virtual timer and setting us up to handle interrupts from the timer hardware. Loading state onto hardware registers and enabling hardware to signal interrupts can be problematic when we're not actually about to run the VCPU, because it makes it difficult to establish the right context when handling interrupts from the timer, and it makes the register access code difficult to reason about. Luckily, now when we call vcpu_load in each ioctl implementation, we can simply remove the call from the non-KVM_RUN vcpu ioctls, and our kvm_arch_vcpu_load() is only used for loading vcpu content to the physical CPU when we're actually going to run the vcpu. Cc: stable(a)vger.kernel.org Fixes: 9b062471e52a ("KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl") Reviewed-by: Julien Grall <julien.grall(a)arm.com> Reviewed-by: Marc Zyngier <marc.zyngier(a)arm.com> Reviewed-by: Andrew Jones <drjones(a)redhat.com> Signed-off-by: Christoffer Dall <christoffer.dall(a)linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier(a)arm.com> diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index d7e3299a7734..959e50d2588c 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -363,8 +363,6 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, { int ret = 0; - vcpu_load(vcpu); - trace_kvm_set_guest_debug(vcpu, dbg->control); if (dbg->control & ~KVM_GUESTDBG_VALID_MASK) { @@ -386,7 +384,6 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, } out: - vcpu_put(vcpu); return ret; } diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index 86941f6181bb..53572304843b 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -384,14 +384,11 @@ static void vcpu_power_off(struct kvm_vcpu *vcpu) int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, struct kvm_mp_state *mp_state) { - vcpu_load(vcpu); - if (vcpu->arch.power_off) mp_state->mp_state = KVM_MP_STATE_STOPPED; else mp_state->mp_state = KVM_MP_STATE_RUNNABLE; - vcpu_put(vcpu); return 0; } @@ -400,8 +397,6 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, { int ret = 0; - vcpu_load(vcpu); - switch (mp_state->mp_state) { case KVM_MP_STATE_RUNNABLE: vcpu->arch.power_off = false; @@ -413,7 +408,6 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, ret = -EINVAL; } - vcpu_put(vcpu); return ret; } @@ -1036,8 +1030,6 @@ long kvm_arch_vcpu_ioctl(struct file *filp, struct kvm_device_attr attr; long r; - vcpu_load(vcpu); - switch (ioctl) { case KVM_ARM_VCPU_INIT: { struct kvm_vcpu_init init; @@ -1114,7 +1106,6 @@ long kvm_arch_vcpu_ioctl(struct file *filp, r = -EINVAL; } - vcpu_put(vcpu); return r; }

6 years, 10 months

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FAILED: patch "[PATCH] drm/i915/gvt: Correct the privilege shadow batch buffer" failed to apply to 4.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From ef75c685869ea2059f85855a7dc00148a704c36c Mon Sep 17 00:00:00 2001 From: fred gao <fred.gao(a)intel.com> Date: Thu, 15 Mar 2018 13:21:10 +0800 Subject: [PATCH] drm/i915/gvt: Correct the privilege shadow batch buffer address Once the ring buffer is copied to ring_scan_buffer and scanned, the shadow batch buffer start address is only updated into ring_scan_buffer, not the real ring address allocated through intel_ring_begin in later copy_workload_to_ring_buffer. This patch is only to set the right shadow batch buffer address from Ring buffer, not include the shadow_wa_ctx. v2: - refine some comments. (Zhenyu) v3: - fix typo in title. (Zhenyu) v4: - remove the unnecessary comments. (Zhenyu) - add comments in bb_start_cmd_va update. (Zhenyu) Fixes: 0a53bc07f044 ("drm/i915/gvt: Separate cmd scan from request allocation") Cc: stable(a)vger.kernel.org # v4.15 Cc: Zhenyu Wang <zhenyuw(a)linux.intel.com> Cc: Yulei Zhang <yulei.zhang(a)intel.com> Signed-off-by: fred gao <fred.gao(a)intel.com> Signed-off-by: Zhenyu Wang <zhenyuw(a)linux.intel.com> diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c index c8454ac43fae..db6b94dda5df 100644 --- a/drivers/gpu/drm/i915/gvt/cmd_parser.c +++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c @@ -471,6 +471,7 @@ struct parser_exec_state { * used when ret from 2nd level batch buffer */ int saved_buf_addr_type; + bool is_ctx_wa; struct cmd_info *info; @@ -1715,6 +1716,11 @@ static int perform_bb_shadow(struct parser_exec_state *s) bb->accessing = true; bb->bb_start_cmd_va = s->ip_va; + if ((s->buf_type == BATCH_BUFFER_INSTRUCTION) && (!s->is_ctx_wa)) + bb->bb_offset = s->ip_va - s->rb_va; + else + bb->bb_offset = 0; + /* * ip_va saves the virtual address of the shadow batch buffer, while * ip_gma saves the graphics address of the original batch buffer. @@ -2571,6 +2577,7 @@ static int scan_workload(struct intel_vgpu_workload *workload) s.ring_tail = gma_tail; s.rb_va = workload->shadow_ring_buffer_va; s.workload = workload; + s.is_ctx_wa = false; if ((bypass_scan_mask & (1 << workload->ring_id)) || gma_head == gma_tail) @@ -2624,6 +2631,7 @@ static int scan_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx) s.ring_tail = gma_tail; s.rb_va = wa_ctx->indirect_ctx.shadow_va; s.workload = workload; + s.is_ctx_wa = true; if (!intel_gvt_ggtt_validate_range(s.vgpu, s.ring_start, s.ring_size)) { ret = -EINVAL; diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c b/drivers/gpu/drm/i915/gvt/scheduler.c index 8caf72c1e794..fdf1c0bf0d55 100644 --- a/drivers/gpu/drm/i915/gvt/scheduler.c +++ b/drivers/gpu/drm/i915/gvt/scheduler.c @@ -426,6 +426,17 @@ static int prepare_shadow_batch_buffer(struct intel_vgpu_workload *workload) goto err; } + /* For privilge batch buffer and not wa_ctx, the bb_start_cmd_va + * is only updated into ring_scan_buffer, not real ring address + * allocated in later copy_workload_to_ring_buffer. pls be noted + * shadow_ring_buffer_va is now pointed to real ring buffer va + * in copy_workload_to_ring_buffer. + */ + + if (bb->bb_offset) + bb->bb_start_cmd_va = workload->shadow_ring_buffer_va + + bb->bb_offset; + /* relocate shadow batch buffer */ bb->bb_start_cmd_va[1] = i915_ggtt_offset(bb->vma); if (gmadr_bytes == 8) diff --git a/drivers/gpu/drm/i915/gvt/scheduler.h b/drivers/gpu/drm/i915/gvt/scheduler.h index 2603336b7c6d..a79a4f60637e 100644 --- a/drivers/gpu/drm/i915/gvt/scheduler.h +++ b/drivers/gpu/drm/i915/gvt/scheduler.h @@ -124,6 +124,7 @@ struct intel_vgpu_shadow_bb { u32 *bb_start_cmd_va; unsigned int clflush; bool accessing; + unsigned long bb_offset; }; #define workload_q_head(vgpu, ring_id) \

6 years, 10 months

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FAILED: patch "[PATCH] KVM: PPC: Book3S HV: Fix trap number return from" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From a8b48a4dccea77e29462e59f1dbf0d5aa1ff167c Mon Sep 17 00:00:00 2001 From: Paul Mackerras <paulus(a)ozlabs.org> Date: Wed, 7 Mar 2018 22:17:20 +1100 Subject: [PATCH] KVM: PPC: Book3S HV: Fix trap number return from __kvmppc_vcore_entry This fixes a bug where the trap number that is returned by __kvmppc_vcore_entry gets corrupted. The effect of the corruption is that IPIs get ignored on POWER9 systems when the IPI is sent via a doorbell interrupt to a CPU which is executing in a KVM guest. The effect of the IPI being ignored is often that another CPU locks up inside smp_call_function_many() (and if that CPU is holding a spinlock, other CPUs then lock up inside raw_spin_lock()). The trap number is currently held in register r12 for most of the assembly-language part of the guest exit path. In that path, we call kvmppc_subcore_exit_guest(), which is a C function, without restoring r12 afterwards. Depending on the kernel config and the compiler, it may modify r12 or it may not, so some config/compiler combinations see the bug and others don't. To fix this, we arrange for the trap number to be stored on the stack from the 'guest_bypass:' label until the end of the function, then the trap number is loaded and returned in r12 as before. Cc: stable(a)vger.kernel.org # v4.8+ Fixes: fd7bacbca47a ("KVM: PPC: Book3S HV: Fix TB corruption in guest exit path on HMI interrupt") Signed-off-by: Paul Mackerras <paulus(a)ozlabs.org> diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index f31f357b8c5a..d33264697a31 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -320,7 +320,6 @@ kvm_novcpu_exit: stw r12, STACK_SLOT_TRAP(r1) bl kvmhv_commence_exit nop - lwz r12, STACK_SLOT_TRAP(r1) b kvmhv_switch_to_host /* @@ -1220,6 +1219,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) secondary_too_late: li r12, 0 + stw r12, STACK_SLOT_TRAP(r1) cmpdi r4, 0 beq 11f stw r12, VCPU_TRAP(r4) @@ -1558,12 +1558,12 @@ mc_cont: 3: stw r5,VCPU_SLB_MAX(r9) guest_bypass: + stw r12, STACK_SLOT_TRAP(r1) mr r3, r12 /* Increment exit count, poke other threads to exit */ bl kvmhv_commence_exit nop ld r9, HSTATE_KVM_VCPU(r13) - lwz r12, VCPU_TRAP(r9) /* Stop others sending VCPU interrupts to this physical CPU */ li r0, -1 @@ -1898,6 +1898,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_POWER9_DD1) * POWER7/POWER8 guest -> host partition switch code. * We don't have to lock against tlbies but we do * have to coordinate the hardware threads. + * Here STACK_SLOT_TRAP(r1) contains the trap number. */ kvmhv_switch_to_host: /* Secondary threads wait for primary to do partition switch */ @@ -1950,12 +1951,12 @@ BEGIN_FTR_SECTION END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) /* If HMI, call kvmppc_realmode_hmi_handler() */ + lwz r12, STACK_SLOT_TRAP(r1) cmpwi r12, BOOK3S_INTERRUPT_HMI bne 27f bl kvmppc_realmode_hmi_handler nop cmpdi r3, 0 - li r12, BOOK3S_INTERRUPT_HMI /* * At this point kvmppc_realmode_hmi_handler may have resync-ed * the TB, and if it has, we must not subtract the guest timebase @@ -2008,10 +2009,8 @@ BEGIN_FTR_SECTION lwz r8, KVM_SPLIT_DO_RESTORE(r3) cmpwi r8, 0 beq 47f - stw r12, STACK_SLOT_TRAP(r1) bl kvmhv_p9_restore_lpcr nop - lwz r12, STACK_SLOT_TRAP(r1) b 48f 47: END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) @@ -2049,6 +2048,7 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_TYPE_RADIX) li r0, KVM_GUEST_MODE_NONE stb r0, HSTATE_IN_GUEST(r13) + lwz r12, STACK_SLOT_TRAP(r1) /* return trap # in r12 */ ld r0, SFS+PPC_LR_STKOFF(r1) addi r1, r1, SFS mtlr r0

6 years, 10 months

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FAILED: patch "[PATCH] KVM: PPC: Book3S HV: Fix trap number return from" failed to apply to 4.14-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From a8b48a4dccea77e29462e59f1dbf0d5aa1ff167c Mon Sep 17 00:00:00 2001 From: Paul Mackerras <paulus(a)ozlabs.org> Date: Wed, 7 Mar 2018 22:17:20 +1100 Subject: [PATCH] KVM: PPC: Book3S HV: Fix trap number return from __kvmppc_vcore_entry This fixes a bug where the trap number that is returned by __kvmppc_vcore_entry gets corrupted. The effect of the corruption is that IPIs get ignored on POWER9 systems when the IPI is sent via a doorbell interrupt to a CPU which is executing in a KVM guest. The effect of the IPI being ignored is often that another CPU locks up inside smp_call_function_many() (and if that CPU is holding a spinlock, other CPUs then lock up inside raw_spin_lock()). The trap number is currently held in register r12 for most of the assembly-language part of the guest exit path. In that path, we call kvmppc_subcore_exit_guest(), which is a C function, without restoring r12 afterwards. Depending on the kernel config and the compiler, it may modify r12 or it may not, so some config/compiler combinations see the bug and others don't. To fix this, we arrange for the trap number to be stored on the stack from the 'guest_bypass:' label until the end of the function, then the trap number is loaded and returned in r12 as before. Cc: stable(a)vger.kernel.org # v4.8+ Fixes: fd7bacbca47a ("KVM: PPC: Book3S HV: Fix TB corruption in guest exit path on HMI interrupt") Signed-off-by: Paul Mackerras <paulus(a)ozlabs.org> diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index f31f357b8c5a..d33264697a31 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -320,7 +320,6 @@ kvm_novcpu_exit: stw r12, STACK_SLOT_TRAP(r1) bl kvmhv_commence_exit nop - lwz r12, STACK_SLOT_TRAP(r1) b kvmhv_switch_to_host /* @@ -1220,6 +1219,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) secondary_too_late: li r12, 0 + stw r12, STACK_SLOT_TRAP(r1) cmpdi r4, 0 beq 11f stw r12, VCPU_TRAP(r4) @@ -1558,12 +1558,12 @@ mc_cont: 3: stw r5,VCPU_SLB_MAX(r9) guest_bypass: + stw r12, STACK_SLOT_TRAP(r1) mr r3, r12 /* Increment exit count, poke other threads to exit */ bl kvmhv_commence_exit nop ld r9, HSTATE_KVM_VCPU(r13) - lwz r12, VCPU_TRAP(r9) /* Stop others sending VCPU interrupts to this physical CPU */ li r0, -1 @@ -1898,6 +1898,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_POWER9_DD1) * POWER7/POWER8 guest -> host partition switch code. * We don't have to lock against tlbies but we do * have to coordinate the hardware threads. + * Here STACK_SLOT_TRAP(r1) contains the trap number. */ kvmhv_switch_to_host: /* Secondary threads wait for primary to do partition switch */ @@ -1950,12 +1951,12 @@ BEGIN_FTR_SECTION END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) /* If HMI, call kvmppc_realmode_hmi_handler() */ + lwz r12, STACK_SLOT_TRAP(r1) cmpwi r12, BOOK3S_INTERRUPT_HMI bne 27f bl kvmppc_realmode_hmi_handler nop cmpdi r3, 0 - li r12, BOOK3S_INTERRUPT_HMI /* * At this point kvmppc_realmode_hmi_handler may have resync-ed * the TB, and if it has, we must not subtract the guest timebase @@ -2008,10 +2009,8 @@ BEGIN_FTR_SECTION lwz r8, KVM_SPLIT_DO_RESTORE(r3) cmpwi r8, 0 beq 47f - stw r12, STACK_SLOT_TRAP(r1) bl kvmhv_p9_restore_lpcr nop - lwz r12, STACK_SLOT_TRAP(r1) b 48f 47: END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) @@ -2049,6 +2048,7 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_TYPE_RADIX) li r0, KVM_GUEST_MODE_NONE stb r0, HSTATE_IN_GUEST(r13) + lwz r12, STACK_SLOT_TRAP(r1) /* return trap # in r12 */ ld r0, SFS+PPC_LR_STKOFF(r1) addi r1, r1, SFS mtlr r0

6 years, 10 months

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FAILED: patch "[PATCH] KVM: PPC: Book3S HV: Fix trap number return from" failed to apply to 4.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From a8b48a4dccea77e29462e59f1dbf0d5aa1ff167c Mon Sep 17 00:00:00 2001 From: Paul Mackerras <paulus(a)ozlabs.org> Date: Wed, 7 Mar 2018 22:17:20 +1100 Subject: [PATCH] KVM: PPC: Book3S HV: Fix trap number return from __kvmppc_vcore_entry This fixes a bug where the trap number that is returned by __kvmppc_vcore_entry gets corrupted. The effect of the corruption is that IPIs get ignored on POWER9 systems when the IPI is sent via a doorbell interrupt to a CPU which is executing in a KVM guest. The effect of the IPI being ignored is often that another CPU locks up inside smp_call_function_many() (and if that CPU is holding a spinlock, other CPUs then lock up inside raw_spin_lock()). The trap number is currently held in register r12 for most of the assembly-language part of the guest exit path. In that path, we call kvmppc_subcore_exit_guest(), which is a C function, without restoring r12 afterwards. Depending on the kernel config and the compiler, it may modify r12 or it may not, so some config/compiler combinations see the bug and others don't. To fix this, we arrange for the trap number to be stored on the stack from the 'guest_bypass:' label until the end of the function, then the trap number is loaded and returned in r12 as before. Cc: stable(a)vger.kernel.org # v4.8+ Fixes: fd7bacbca47a ("KVM: PPC: Book3S HV: Fix TB corruption in guest exit path on HMI interrupt") Signed-off-by: Paul Mackerras <paulus(a)ozlabs.org> diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index f31f357b8c5a..d33264697a31 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -320,7 +320,6 @@ kvm_novcpu_exit: stw r12, STACK_SLOT_TRAP(r1) bl kvmhv_commence_exit nop - lwz r12, STACK_SLOT_TRAP(r1) b kvmhv_switch_to_host /* @@ -1220,6 +1219,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) secondary_too_late: li r12, 0 + stw r12, STACK_SLOT_TRAP(r1) cmpdi r4, 0 beq 11f stw r12, VCPU_TRAP(r4) @@ -1558,12 +1558,12 @@ mc_cont: 3: stw r5,VCPU_SLB_MAX(r9) guest_bypass: + stw r12, STACK_SLOT_TRAP(r1) mr r3, r12 /* Increment exit count, poke other threads to exit */ bl kvmhv_commence_exit nop ld r9, HSTATE_KVM_VCPU(r13) - lwz r12, VCPU_TRAP(r9) /* Stop others sending VCPU interrupts to this physical CPU */ li r0, -1 @@ -1898,6 +1898,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_POWER9_DD1) * POWER7/POWER8 guest -> host partition switch code. * We don't have to lock against tlbies but we do * have to coordinate the hardware threads. + * Here STACK_SLOT_TRAP(r1) contains the trap number. */ kvmhv_switch_to_host: /* Secondary threads wait for primary to do partition switch */ @@ -1950,12 +1951,12 @@ BEGIN_FTR_SECTION END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) /* If HMI, call kvmppc_realmode_hmi_handler() */ + lwz r12, STACK_SLOT_TRAP(r1) cmpwi r12, BOOK3S_INTERRUPT_HMI bne 27f bl kvmppc_realmode_hmi_handler nop cmpdi r3, 0 - li r12, BOOK3S_INTERRUPT_HMI /* * At this point kvmppc_realmode_hmi_handler may have resync-ed * the TB, and if it has, we must not subtract the guest timebase @@ -2008,10 +2009,8 @@ BEGIN_FTR_SECTION lwz r8, KVM_SPLIT_DO_RESTORE(r3) cmpwi r8, 0 beq 47f - stw r12, STACK_SLOT_TRAP(r1) bl kvmhv_p9_restore_lpcr nop - lwz r12, STACK_SLOT_TRAP(r1) b 48f 47: END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) @@ -2049,6 +2048,7 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_TYPE_RADIX) li r0, KVM_GUEST_MODE_NONE stb r0, HSTATE_IN_GUEST(r13) + lwz r12, STACK_SLOT_TRAP(r1) /* return trap # in r12 */ ld r0, SFS+PPC_LR_STKOFF(r1) addi r1, r1, SFS mtlr r0

6 years, 10 months

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[PATCH v4] mtdchar: fix usage of mtd_ooblayout_ecc()

by OuYang ZhiZhong

Section was not properly computed. The value of OOB region definition is always ECC section 0 information in the OOB area, but we want to get all the ECC bytes information, so we should call mtd_ooblayout_ecc(mtd, section++, &oobregion) until it returns -ERANGE. Fixes: c2b78452a9db ("mtd: use mtd_ooblayout_xxx() helpers where appropriate") Cc: <stable(a)vger.kernel.org> Signed-off-by: OuYang ZhiZhong <ouyzz(a)yealink.com> --- drivers/mtd/mtdchar.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index de8c902..7d80a8b 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -479,7 +479,7 @@ static int shrink_ecclayout(struct mtd_info *mtd, for (i = 0; i < MTD_MAX_ECCPOS_ENTRIES;) { u32 eccpos; - ret = mtd_ooblayout_ecc(mtd, section, &oobregion); + ret = mtd_ooblayout_ecc(mtd, section++, &oobregion); if (ret < 0) { if (ret != -ERANGE) return ret; @@ -526,7 +526,7 @@ static int get_oobinfo(struct mtd_info *mtd, struct nand_oobinfo *to) for (i = 0; i < ARRAY_SIZE(to->eccpos);) { u32 eccpos; - ret = mtd_ooblayout_ecc(mtd, section, &oobregion); + ret = mtd_ooblayout_ecc(mtd, section++, &oobregion); if (ret < 0) { if (ret != -ERANGE) return ret; -- 1.7.9.5

6 years, 10 months

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Patch "x86/boot/32: Fix UP boot on Quark and possibly other platforms" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled x86/boot/32: Fix UP boot on Quark and possibly other platforms to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: x86-boot-32-fix-up-boot-on-quark-and-possibly-other-platforms.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From d2b6dc61a8dd3c429609b993778cb54e75a5c5f0 Mon Sep 17 00:00:00 2001 From: Andy Lutomirski <luto(a)kernel.org> Date: Mon, 8 May 2017 17:09:10 -0700 Subject: x86/boot/32: Fix UP boot on Quark and possibly other platforms From: Andy Lutomirski <luto(a)kernel.org> commit d2b6dc61a8dd3c429609b993778cb54e75a5c5f0 upstream. This partially reverts commit: 23b2a4ddebdd17f ("x86/boot/32: Defer resyncing initial_page_table until per-cpu is set up") That commit had one definite bug and one potential bug. The definite bug is that setup_per_cpu_areas() uses a differnet generic implementation on UP kernels, so initial_page_table never got resynced. This was fine for access to percpu data (it's in the identity map on UP), but it breaks other users of initial_page_table. The potential bug is that helpers like efi_init() would be called before the tables were synced. Avoid both problems by just syncing the page tables in setup_arch() *and* setup_per_cpu_areas(). Reported-by: Jan Kiszka <jan.kiszka(a)siemens.com> Signed-off-by: Andy Lutomirski <luto(a)kernel.org> Cc: Andy Shevchenko <andy.shevchenko(a)gmail.com> Cc: Ard Biesheuvel <ard.biesheuvel(a)linaro.org> Cc: Boris Ostrovsky <boris.ostrovsky(a)oracle.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: Brian Gerst <brgerst(a)gmail.com> Cc: Denys Vlasenko <dvlasenk(a)redhat.com> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Matt Fleming <matt(a)codeblueprint.co.uk> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: Thomas Garnier <thgarnie(a)google.com> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: linux-efi(a)vger.kernel.org Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kernel/setup.c | 15 +++++++++++++++ arch/x86/kernel/setup_percpu.c | 10 +++++----- 2 files changed, 20 insertions(+), 5 deletions(-) --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1200,6 +1200,21 @@ void __init setup_arch(char **cmdline_p) kasan_init(); +#ifdef CONFIG_X86_32 + /* sync back kernel address range */ + clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY, + swapper_pg_dir + KERNEL_PGD_BOUNDARY, + KERNEL_PGD_PTRS); + + /* + * sync back low identity map too. It is used for example + * in the 32-bit EFI stub. + */ + clone_pgd_range(initial_page_table, + swapper_pg_dir + KERNEL_PGD_BOUNDARY, + min(KERNEL_PGD_PTRS, KERNEL_PGD_BOUNDARY)); +#endif + tboot_probe(); map_vsyscall(); --- a/arch/x86/kernel/setup_percpu.c +++ b/arch/x86/kernel/setup_percpu.c @@ -290,11 +290,11 @@ void __init setup_per_cpu_areas(void) #ifdef CONFIG_X86_32 /* - * Sync back kernel address range. We want to make sure that - * all kernel mappings, including percpu mappings, are available - * in the smpboot asm. We can't reliably pick up percpu - * mappings using vmalloc_fault(), because exception dispatch - * needs percpu data. + * Sync back kernel address range again. We already did this in + * setup_arch(), but percpu data also needs to be available in + * the smpboot asm. We can't reliably pick up percpu mappings + * using vmalloc_fault(), because exception dispatch needs + * percpu data. */ clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY, swapper_pg_dir + KERNEL_PGD_BOUNDARY, Patches currently in stable-queue which might be from luto(a)kernel.org are queue-4.9/perf-tools-make-perf_event__synthesize_mmap_events-scale.patch queue-4.9/x86-mm-make-mmap-map_32bit-work-correctly.patch queue-4.9/x86-boot-32-defer-resyncing-initial_page_table-until-per-cpu-is-set-up.patch queue-4.9/x86-boot-32-fix-up-boot-on-quark-and-possibly-other-platforms.patch

6 years, 10 months

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Patch "x86/boot/32: Defer resyncing initial_page_table until per-cpu is set up" has been added to the 4.9-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled x86/boot/32: Defer resyncing initial_page_table until per-cpu is set up to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: x86-boot-32-defer-resyncing-initial_page_table-until-per-cpu-is-set-up.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Sun Mar 18 16:55:33 CET 2018 From: Andy Lutomirski <luto(a)kernel.org> Date: Wed, 22 Mar 2017 14:32:32 -0700 Subject: x86/boot/32: Defer resyncing initial_page_table until per-cpu is set up From: Andy Lutomirski <luto(a)kernel.org> [ Upstream commit 23b2a4ddebdd17fad265b4bb77256c2e4ec37dee ] The x86 smpboot trampoline expects initial_page_table to have the GDT mapped. If the GDT ends up in a virtually mapped per-cpu page, then it won't be in the page tables at all until perc-pu areas are set up. The result will be a triple fault the first time that the CPU attempts to access the GDT after LGDT loads the perc-pu GDT. This appears to be an old bug, but somehow the GDT fixmap rework is triggering it. This seems to have something to do with the memory layout. Signed-off-by: Andy Lutomirski <luto(a)kernel.org> Cc: Ard Biesheuvel <ard.biesheuvel(a)linaro.org> Cc: Boris Ostrovsky <boris.ostrovsky(a)oracle.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: Brian Gerst <brgerst(a)gmail.com> Cc: Denys Vlasenko <dvlasenk(a)redhat.com> Cc: H. Peter Anvin <hpa(a)zytor.com> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Matt Fleming <matt(a)codeblueprint.co.uk> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: Thomas Garnier <thgarnie(a)google.com> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: linux-efi(a)vger.kernel.org Link: http://lkml.kernel.org/r/a553264a5972c6a86f9b5caac237470a0c74a720.149021806… Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Signed-off-by: Sasha Levin <alexander.levin(a)microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kernel/setup.c | 15 --------------- arch/x86/kernel/setup_percpu.c | 21 +++++++++++++++++++++ 2 files changed, 21 insertions(+), 15 deletions(-) --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1200,21 +1200,6 @@ void __init setup_arch(char **cmdline_p) kasan_init(); -#ifdef CONFIG_X86_32 - /* sync back kernel address range */ - clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY, - swapper_pg_dir + KERNEL_PGD_BOUNDARY, - KERNEL_PGD_PTRS); - - /* - * sync back low identity map too. It is used for example - * in the 32-bit EFI stub. - */ - clone_pgd_range(initial_page_table, - swapper_pg_dir + KERNEL_PGD_BOUNDARY, - min(KERNEL_PGD_PTRS, KERNEL_PGD_BOUNDARY)); -#endif - tboot_probe(); map_vsyscall(); --- a/arch/x86/kernel/setup_percpu.c +++ b/arch/x86/kernel/setup_percpu.c @@ -287,4 +287,25 @@ void __init setup_per_cpu_areas(void) /* Setup cpu initialized, callin, callout masks */ setup_cpu_local_masks(); + +#ifdef CONFIG_X86_32 + /* + * Sync back kernel address range. We want to make sure that + * all kernel mappings, including percpu mappings, are available + * in the smpboot asm. We can't reliably pick up percpu + * mappings using vmalloc_fault(), because exception dispatch + * needs percpu data. + */ + clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY, + swapper_pg_dir + KERNEL_PGD_BOUNDARY, + KERNEL_PGD_PTRS); + + /* + * sync back low identity map too. It is used for example + * in the 32-bit EFI stub. + */ + clone_pgd_range(initial_page_table, + swapper_pg_dir + KERNEL_PGD_BOUNDARY, + min(KERNEL_PGD_PTRS, KERNEL_PGD_BOUNDARY)); +#endif } Patches currently in stable-queue which might be from luto(a)kernel.org are queue-4.9/perf-tools-make-perf_event__synthesize_mmap_events-scale.patch queue-4.9/x86-mm-make-mmap-map_32bit-work-correctly.patch queue-4.9/x86-boot-32-defer-resyncing-initial_page_table-until-per-cpu-is-set-up.patch

6 years, 10 months

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Patch "wil6210: fix memory access violation in wil_memcpy_from/toio_32" has been added to the 3.18-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled wil6210: fix memory access violation in wil_memcpy_from/toio_32 to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: wil6210-fix-memory-access-violation-in-wil_memcpy_from-toio_32.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Mon Mar 19 10:11:52 CET 2018 From: Dedy Lansky <qca_dlansky(a)qca.qualcomm.com> Date: Wed, 5 Apr 2017 14:58:11 +0300 Subject: wil6210: fix memory access violation in wil_memcpy_from/toio_32 From: Dedy Lansky <qca_dlansky(a)qca.qualcomm.com> [ Upstream commit 0f6edfe2bbbb59d161580cb4870fcc46f5490f85 ] In case count is not multiple of 4, there is a read access in wil_memcpy_toio_32() from outside src buffer boundary. In wil_memcpy_fromio_32(), in case count is not multiple of 4, there is a write access to outside dst io memory boundary. Fix these issues with proper handling of the last 1 to 4 copied bytes. Signed-off-by: Dedy Lansky <qca_dlansky(a)qca.qualcomm.com> Signed-off-by: Maya Erez <qca_merez(a)qca.qualcomm.com> Signed-off-by: Kalle Valo <kvalo(a)qca.qualcomm.com> Signed-off-by: Sasha Levin <alexander.levin(a)microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/net/wireless/ath/wil6210/main.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) --- a/drivers/net/wireless/ath/wil6210/main.c +++ b/drivers/net/wireless/ath/wil6210/main.c @@ -59,9 +59,15 @@ void wil_memcpy_fromio_32(void *dst, con u32 *d = dst; const volatile u32 __iomem *s = src; - /* size_t is unsigned, if (count%4 != 0) it will wrap */ - for (count += 4; count > 4; count -= 4) + for (; count >= 4; count -= 4) *d++ = __raw_readl(s++); + + if (unlikely(count)) { + /* count can be 1..3 */ + u32 tmp = __raw_readl(s); + + memcpy(d, &tmp, count); + } } void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src, @@ -70,8 +76,16 @@ void wil_memcpy_toio_32(volatile void __ volatile u32 __iomem *d = dst; const u32 *s = src; - for (count += 4; count > 4; count -= 4) + for (; count >= 4; count -= 4) __raw_writel(*s++, d++); + + if (unlikely(count)) { + /* count can be 1..3 */ + u32 tmp = 0; + + memcpy(&tmp, s, count); + __raw_writel(tmp, d); + } } static void wil_disconnect_cid(struct wil6210_priv *wil, int cid) Patches currently in stable-queue which might be from qca_dlansky(a)qca.qualcomm.com are queue-3.18/wil6210-fix-memory-access-violation-in-wil_memcpy_from-toio_32.patch

6 years, 10 months

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Patch "video: ARM CLCD: fix dma allocation size" has been added to the 3.18-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled video: ARM CLCD: fix dma allocation size to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: video-arm-clcd-fix-dma-allocation-size.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From foo@baz Mon Mar 19 10:11:52 CET 2018 From: Liam Beguin <lbeguin(a)tycoint.com> Date: Fri, 7 Apr 2017 17:03:24 +0200 Subject: video: ARM CLCD: fix dma allocation size From: Liam Beguin <lbeguin(a)tycoint.com> [ Upstream commit 9a1c779e6b06855e41099caa6f15b3b584dfa88c ] This patch forces the frambuffer size to be aligned on kernel pages. During the board startup, the splash screed did appear; the "ts_test" program or our application were not able to start. The following error message was reported: error: failed to map framebuffer device to memory. LinuxFB: driver cannot connect The issue was discovered, on the LPC32xx platform, during the migration of the LCD definition from the board file to the device tree. Signed-off-by: Liam Beguin <lbeguin(a)tycoint.com> Signed-off-by: Sylvain Lemieux <slemieux(a)tycoint.com> Cc: Vladimir Zapolskiy <vz(a)mleia.com> Cc: Russell King <linux(a)armlinux.org.uk> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie(a)samsung.com> Signed-off-by: Sasha Levin <alexander.levin(a)microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/video/fbdev/amba-clcd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/video/fbdev/amba-clcd.c +++ b/drivers/video/fbdev/amba-clcd.c @@ -757,8 +757,8 @@ static int clcdfb_of_dma_setup(struct cl if (err) return err; - framesize = fb->panel->mode.xres * fb->panel->mode.yres * - fb->panel->bpp / 8; + framesize = PAGE_ALIGN(fb->panel->mode.xres * fb->panel->mode.yres * + fb->panel->bpp / 8); fb->fb.screen_base = dma_alloc_coherent(&fb->dev->dev, framesize, &dma, GFP_KERNEL); if (!fb->fb.screen_base) Patches currently in stable-queue which might be from lbeguin(a)tycoint.com are queue-3.18/video-arm-clcd-fix-dma-allocation-size.patch

6 years, 10 months

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Linux-stable-mirror March 2018