February 2018 - Linux-stable-mirror

Patch "[Variant 2/Spectre-v2] arm/arm64: KVM: Turn kvm_psci_version into a static inline" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled [Variant 2/Spectre-v2] arm/arm64: KVM: Turn kvm_psci_version into a static inline to the 4.15-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: arm-arm64-kvm-turn-kvm_psci_version-into-a-static-inline.patch and it can be found in the queue-4.15 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 Tue Feb 13 17:25:10 CET 2018 From: Marc Zyngier <marc.zyngier(a)arm.com> Date: Tue, 6 Feb 2018 17:56:13 +0000 Subject: [Variant 2/Spectre-v2] arm/arm64: KVM: Turn kvm_psci_version into a static inline From: Marc Zyngier <marc.zyngier(a)arm.com> Commit a4097b351118 upstream. We're about to need kvm_psci_version in HYP too. So let's turn it into a static inline, and pass the kvm structure as a second parameter (so that HYP can do a kern_hyp_va on it). Tested-by: Ard Biesheuvel <ard.biesheuvel(a)linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall(a)linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier(a)arm.com> Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com> Signed-off-by: Will Deacon <will.deacon(a)arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/arm64/kvm/hyp/switch.c | 18 +++++++++++------- include/kvm/arm_psci.h | 21 ++++++++++++++++++++- virt/kvm/arm/psci.c | 12 ++---------- 3 files changed, 33 insertions(+), 18 deletions(-) --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -19,6 +19,8 @@ #include <linux/jump_label.h> #include <uapi/linux/psci.h> +#include <kvm/arm_psci.h> + #include <asm/kvm_asm.h> #include <asm/kvm_emulate.h> #include <asm/kvm_hyp.h> @@ -344,14 +346,16 @@ again: if (exit_code == ARM_EXCEPTION_TRAP && (kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_HVC64 || - kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_HVC32) && - vcpu_get_reg(vcpu, 0) == PSCI_0_2_FN_PSCI_VERSION) { - u64 val = PSCI_RET_NOT_SUPPORTED; - if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features)) - val = 2; + kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_HVC32)) { + u32 val = vcpu_get_reg(vcpu, 0); - vcpu_set_reg(vcpu, 0, val); - goto again; + if (val == PSCI_0_2_FN_PSCI_VERSION) { + val = kvm_psci_version(vcpu, kern_hyp_va(vcpu->kvm)); + if (unlikely(val == KVM_ARM_PSCI_0_1)) + val = PSCI_RET_NOT_SUPPORTED; + vcpu_set_reg(vcpu, 0, val); + goto again; + } } if (static_branch_unlikely(&vgic_v2_cpuif_trap) && --- a/include/kvm/arm_psci.h +++ b/include/kvm/arm_psci.h @@ -18,6 +18,7 @@ #ifndef __KVM_ARM_PSCI_H__ #define __KVM_ARM_PSCI_H__ +#include <linux/kvm_host.h> #include <uapi/linux/psci.h> #define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1) @@ -26,7 +27,25 @@ #define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_0 -int kvm_psci_version(struct kvm_vcpu *vcpu); +/* + * We need the KVM pointer independently from the vcpu as we can call + * this from HYP, and need to apply kern_hyp_va on it... + */ +static inline int kvm_psci_version(struct kvm_vcpu *vcpu, struct kvm *kvm) +{ + /* + * Our PSCI implementation stays the same across versions from + * v0.2 onward, only adding the few mandatory functions (such + * as FEATURES with 1.0) that are required by newer + * revisions. It is thus safe to return the latest. + */ + if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features)) + return KVM_ARM_PSCI_LATEST; + + return KVM_ARM_PSCI_0_1; +} + + int kvm_hvc_call_handler(struct kvm_vcpu *vcpu); #endif /* __KVM_ARM_PSCI_H__ */ --- a/virt/kvm/arm/psci.c +++ b/virt/kvm/arm/psci.c @@ -123,7 +123,7 @@ static unsigned long kvm_psci_vcpu_on(st if (!vcpu) return PSCI_RET_INVALID_PARAMS; if (!vcpu->arch.power_off) { - if (kvm_psci_version(source_vcpu) != KVM_ARM_PSCI_0_1) + if (kvm_psci_version(source_vcpu, kvm) != KVM_ARM_PSCI_0_1) return PSCI_RET_ALREADY_ON; else return PSCI_RET_INVALID_PARAMS; @@ -232,14 +232,6 @@ static void kvm_psci_system_reset(struct kvm_prepare_system_event(vcpu, KVM_SYSTEM_EVENT_RESET); } -int kvm_psci_version(struct kvm_vcpu *vcpu) -{ - if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features)) - return KVM_ARM_PSCI_LATEST; - - return KVM_ARM_PSCI_0_1; -} - static int kvm_psci_0_2_call(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; @@ -397,7 +389,7 @@ static int kvm_psci_0_1_call(struct kvm_ */ static int kvm_psci_call(struct kvm_vcpu *vcpu) { - switch (kvm_psci_version(vcpu)) { + switch (kvm_psci_version(vcpu, vcpu->kvm)) { case KVM_ARM_PSCI_1_0: return kvm_psci_1_0_call(vcpu); case KVM_ARM_PSCI_0_2: Patches currently in stable-queue which might be from marc.zyngier(a)arm.com are queue-4.15/arm-arm64-smccc-make-function-identifiers-an-unsigned-quantity.patch queue-4.15/arm64-move-bp-hardening-to-check_and_switch_context.patch queue-4.15/arm-arm64-kvm-advertise-smccc-v1.1.patch queue-4.15/arm64-move-post_ttbr_update_workaround-to-c-code.patch queue-4.15/firmware-psci-expose-psci-conduit.patch queue-4.15/arm64-force-kpti-to-be-disabled-on-cavium-thunderx.patch queue-4.15/arm64-entry-apply-bp-hardening-for-high-priority-synchronous-exceptions.patch queue-4.15/arm64-kpti-fix-the-interaction-between-asid-switching-and-software-pan.patch queue-4.15/firmware-psci-expose-smccc-version-through-psci_ops.patch queue-4.15/arm64-implement-branch-predictor-hardening-for-affected-cortex-a-cpus.patch queue-4.15/arm-arm64-kvm-add-psci_version-helper.patch queue-4.15/arm64-kill-psci_get_version-as-a-variant-2-workaround.patch queue-4.15/arm64-entry-apply-bp-hardening-for-suspicious-interrupts-from-el0.patch queue-4.15/arm64-capabilities-handle-duplicate-entries-for-a-capability.patch queue-4.15/arm64-add-arm_smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-kvm-turn-kvm_psci_version-into-a-static-inline.patch queue-4.15/arm-arm64-kvm-implement-psci-1.0-support.patch queue-4.15/arm64-kvm-add-smccc_arch_workaround_1-fast-handling.patch queue-4.15/arm64-kvm-report-smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-smccc-implement-smccc-v1.1-inline-primitive.patch queue-4.15/arm64-idmap-use-awx-flags-for-.idmap.text-.pushsection-directives.patch queue-4.15/arm64-kvm-make-psci_version-a-fast-path.patch queue-4.15/arm64-cpufeature-__this_cpu_has_cap-shouldn-t-stop-early.patch queue-4.15/arm64-kpti-add-enable-callback-to-remap-swapper-using-ng-mappings.patch queue-4.15/arm-arm64-kvm-consolidate-the-psci-include-files.patch queue-4.15/arm64-add-skeleton-to-harden-the-branch-predictor-against-aliasing-attacks.patch queue-4.15/arm-arm64-kvm-add-smccc-accessors-to-psci-code.patch queue-4.15/arm64-kvm-use-per-cpu-vector-when-bp-hardening-is-enabled.patch queue-4.15/arm64-kvm-increment-pc-after-handling-an-smc-trap.patch

6 years, 11 months

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Patch "[Variant 2/Spectre-v2] arm/arm64: smccc: Implement SMCCC v1.1 inline primitive" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled [Variant 2/Spectre-v2] arm/arm64: smccc: Implement SMCCC v1.1 inline primitive to the 4.15-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: arm-arm64-smccc-implement-smccc-v1.1-inline-primitive.patch and it can be found in the queue-4.15 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 Tue Feb 13 17:25:10 CET 2018 From: Marc Zyngier <marc.zyngier(a)arm.com> Date: Tue, 6 Feb 2018 17:56:19 +0000 Subject: [Variant 2/Spectre-v2] arm/arm64: smccc: Implement SMCCC v1.1 inline primitive From: Marc Zyngier <marc.zyngier(a)arm.com> Commit f2d3b2e8759a upstream. One of the major improvement of SMCCC v1.1 is that it only clobbers the first 4 registers, both on 32 and 64bit. This means that it becomes very easy to provide an inline version of the SMC call primitive, and avoid performing a function call to stash the registers that would otherwise be clobbered by SMCCC v1.0. Reviewed-by: Robin Murphy <robin.murphy(a)arm.com> Tested-by: Ard Biesheuvel <ard.biesheuvel(a)linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier(a)arm.com> Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com> Signed-off-by: Will Deacon <will.deacon(a)arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- include/linux/arm-smccc.h | 141 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 141 insertions(+) --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -150,5 +150,146 @@ asmlinkage void __arm_smccc_hvc(unsigned #define arm_smccc_hvc_quirk(...) __arm_smccc_hvc(__VA_ARGS__) +/* SMCCC v1.1 implementation madness follows */ +#ifdef CONFIG_ARM64 + +#define SMCCC_SMC_INST "smc #0" +#define SMCCC_HVC_INST "hvc #0" + +#elif defined(CONFIG_ARM) +#include <asm/opcodes-sec.h> +#include <asm/opcodes-virt.h> + +#define SMCCC_SMC_INST __SMC(0) +#define SMCCC_HVC_INST __HVC(0) + +#endif + +#define ___count_args(_0, _1, _2, _3, _4, _5, _6, _7, _8, x, ...) x + +#define __count_args(...) \ + ___count_args(__VA_ARGS__, 7, 6, 5, 4, 3, 2, 1, 0) + +#define __constraint_write_0 \ + "+r" (r0), "=&r" (r1), "=&r" (r2), "=&r" (r3) +#define __constraint_write_1 \ + "+r" (r0), "+r" (r1), "=&r" (r2), "=&r" (r3) +#define __constraint_write_2 \ + "+r" (r0), "+r" (r1), "+r" (r2), "=&r" (r3) +#define __constraint_write_3 \ + "+r" (r0), "+r" (r1), "+r" (r2), "+r" (r3) +#define __constraint_write_4 __constraint_write_3 +#define __constraint_write_5 __constraint_write_4 +#define __constraint_write_6 __constraint_write_5 +#define __constraint_write_7 __constraint_write_6 + +#define __constraint_read_0 +#define __constraint_read_1 +#define __constraint_read_2 +#define __constraint_read_3 +#define __constraint_read_4 "r" (r4) +#define __constraint_read_5 __constraint_read_4, "r" (r5) +#define __constraint_read_6 __constraint_read_5, "r" (r6) +#define __constraint_read_7 __constraint_read_6, "r" (r7) + +#define __declare_arg_0(a0, res) \ + struct arm_smccc_res *___res = res; \ + register u32 r0 asm("r0") = a0; \ + register unsigned long r1 asm("r1"); \ + register unsigned long r2 asm("r2"); \ + register unsigned long r3 asm("r3") + +#define __declare_arg_1(a0, a1, res) \ + struct arm_smccc_res *___res = res; \ + register u32 r0 asm("r0") = a0; \ + register typeof(a1) r1 asm("r1") = a1; \ + register unsigned long r2 asm("r2"); \ + register unsigned long r3 asm("r3") + +#define __declare_arg_2(a0, a1, a2, res) \ + struct arm_smccc_res *___res = res; \ + register u32 r0 asm("r0") = a0; \ + register typeof(a1) r1 asm("r1") = a1; \ + register typeof(a2) r2 asm("r2") = a2; \ + register unsigned long r3 asm("r3") + +#define __declare_arg_3(a0, a1, a2, a3, res) \ + struct arm_smccc_res *___res = res; \ + register u32 r0 asm("r0") = a0; \ + register typeof(a1) r1 asm("r1") = a1; \ + register typeof(a2) r2 asm("r2") = a2; \ + register typeof(a3) r3 asm("r3") = a3 + +#define __declare_arg_4(a0, a1, a2, a3, a4, res) \ + __declare_arg_3(a0, a1, a2, a3, res); \ + register typeof(a4) r4 asm("r4") = a4 + +#define __declare_arg_5(a0, a1, a2, a3, a4, a5, res) \ + __declare_arg_4(a0, a1, a2, a3, a4, res); \ + register typeof(a5) r5 asm("r5") = a5 + +#define __declare_arg_6(a0, a1, a2, a3, a4, a5, a6, res) \ + __declare_arg_5(a0, a1, a2, a3, a4, a5, res); \ + register typeof(a6) r6 asm("r6") = a6 + +#define __declare_arg_7(a0, a1, a2, a3, a4, a5, a6, a7, res) \ + __declare_arg_6(a0, a1, a2, a3, a4, a5, a6, res); \ + register typeof(a7) r7 asm("r7") = a7 + +#define ___declare_args(count, ...) __declare_arg_ ## count(__VA_ARGS__) +#define __declare_args(count, ...) ___declare_args(count, __VA_ARGS__) + +#define ___constraints(count) \ + : __constraint_write_ ## count \ + : __constraint_read_ ## count \ + : "memory" +#define __constraints(count) ___constraints(count) + +/* + * We have an output list that is not necessarily used, and GCC feels + * entitled to optimise the whole sequence away. "volatile" is what + * makes it stick. + */ +#define __arm_smccc_1_1(inst, ...) \ + do { \ + __declare_args(__count_args(__VA_ARGS__), __VA_ARGS__); \ + asm volatile(inst "\n" \ + __constraints(__count_args(__VA_ARGS__))); \ + if (___res) \ + *___res = (typeof(*___res)){r0, r1, r2, r3}; \ + } while (0) + +/* + * arm_smccc_1_1_smc() - make an SMCCC v1.1 compliant SMC call + * + * This is a variadic macro taking one to eight source arguments, and + * an optional return structure. + * + * @a0-a7: arguments passed in registers 0 to 7 + * @res: result values from registers 0 to 3 + * + * This macro is used to make SMC calls following SMC Calling Convention v1.1. + * The content of the supplied param are copied to registers 0 to 7 prior + * to the SMC instruction. The return values are updated with the content + * from register 0 to 3 on return from the SMC instruction if not NULL. + */ +#define arm_smccc_1_1_smc(...) __arm_smccc_1_1(SMCCC_SMC_INST, __VA_ARGS__) + +/* + * arm_smccc_1_1_hvc() - make an SMCCC v1.1 compliant HVC call + * + * This is a variadic macro taking one to eight source arguments, and + * an optional return structure. + * + * @a0-a7: arguments passed in registers 0 to 7 + * @res: result values from registers 0 to 3 + * + * This macro is used to make HVC calls following SMC Calling Convention v1.1. + * The content of the supplied param are copied to registers 0 to 7 prior + * to the HVC instruction. The return values are updated with the content + * from register 0 to 3 on return from the HVC instruction if not NULL. + */ +#define arm_smccc_1_1_hvc(...) __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__) + #endif /*__ASSEMBLY__*/ #endif /*__LINUX_ARM_SMCCC_H*/ Patches currently in stable-queue which might be from marc.zyngier(a)arm.com are queue-4.15/arm-arm64-smccc-make-function-identifiers-an-unsigned-quantity.patch queue-4.15/arm64-move-bp-hardening-to-check_and_switch_context.patch queue-4.15/arm-arm64-kvm-advertise-smccc-v1.1.patch queue-4.15/arm64-move-post_ttbr_update_workaround-to-c-code.patch queue-4.15/firmware-psci-expose-psci-conduit.patch queue-4.15/arm64-force-kpti-to-be-disabled-on-cavium-thunderx.patch queue-4.15/arm64-entry-apply-bp-hardening-for-high-priority-synchronous-exceptions.patch queue-4.15/arm64-kpti-fix-the-interaction-between-asid-switching-and-software-pan.patch queue-4.15/firmware-psci-expose-smccc-version-through-psci_ops.patch queue-4.15/arm64-implement-branch-predictor-hardening-for-affected-cortex-a-cpus.patch queue-4.15/arm-arm64-kvm-add-psci_version-helper.patch queue-4.15/arm64-kill-psci_get_version-as-a-variant-2-workaround.patch queue-4.15/arm64-entry-apply-bp-hardening-for-suspicious-interrupts-from-el0.patch queue-4.15/arm64-capabilities-handle-duplicate-entries-for-a-capability.patch queue-4.15/arm64-add-arm_smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-kvm-turn-kvm_psci_version-into-a-static-inline.patch queue-4.15/arm-arm64-kvm-implement-psci-1.0-support.patch queue-4.15/arm64-kvm-add-smccc_arch_workaround_1-fast-handling.patch queue-4.15/arm64-kvm-report-smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-smccc-implement-smccc-v1.1-inline-primitive.patch queue-4.15/arm64-idmap-use-awx-flags-for-.idmap.text-.pushsection-directives.patch queue-4.15/arm64-kvm-make-psci_version-a-fast-path.patch queue-4.15/arm64-cpufeature-__this_cpu_has_cap-shouldn-t-stop-early.patch queue-4.15/arm64-kpti-add-enable-callback-to-remap-swapper-using-ng-mappings.patch queue-4.15/arm-arm64-kvm-consolidate-the-psci-include-files.patch queue-4.15/arm64-add-skeleton-to-harden-the-branch-predictor-against-aliasing-attacks.patch queue-4.15/arm-arm64-kvm-add-smccc-accessors-to-psci-code.patch queue-4.15/arm64-kvm-use-per-cpu-vector-when-bp-hardening-is-enabled.patch queue-4.15/arm64-kvm-increment-pc-after-handling-an-smc-trap.patch

6 years, 11 months

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Patch "[Variant 2/Spectre-v2] arm/arm64: KVM: Consolidate the PSCI include files" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled [Variant 2/Spectre-v2] arm/arm64: KVM: Consolidate the PSCI include files to the 4.15-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: arm-arm64-kvm-consolidate-the-psci-include-files.patch and it can be found in the queue-4.15 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 Tue Feb 13 17:25:10 CET 2018 From: Marc Zyngier <marc.zyngier(a)arm.com> Date: Tue, 6 Feb 2018 17:56:08 +0000 Subject: [Variant 2/Spectre-v2] arm/arm64: KVM: Consolidate the PSCI include files From: Marc Zyngier <marc.zyngier(a)arm.com> Commit 1a2fb94e6a77 upstream. As we're about to update the PSCI support, and because I'm lazy, let's move the PSCI include file to include/kvm so that both ARM architectures can find it. Acked-by: Christoffer Dall <christoffer.dall(a)linaro.org> Tested-by: Ard Biesheuvel <ard.biesheuvel(a)linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier(a)arm.com> Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com> Signed-off-by: Will Deacon <will.deacon(a)arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/arm/include/asm/kvm_psci.h | 27 --------------------------- arch/arm/kvm/handle_exit.c | 2 +- arch/arm64/include/asm/kvm_psci.h | 27 --------------------------- arch/arm64/kvm/handle_exit.c | 3 ++- include/kvm/arm_psci.h | 27 +++++++++++++++++++++++++++ virt/kvm/arm/arm.c | 2 +- virt/kvm/arm/psci.c | 3 ++- 7 files changed, 33 insertions(+), 58 deletions(-) delete mode 100644 arch/arm/include/asm/kvm_psci.h rename arch/arm64/include/asm/kvm_psci.h => include/kvm/arm_psci.h (89%) --- a/arch/arm/include/asm/kvm_psci.h +++ /dev/null @@ -1,27 +0,0 @@ -/* - * Copyright (C) 2012 - ARM Ltd - * Author: Marc Zyngier <marc.zyngier(a)arm.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#ifndef __ARM_KVM_PSCI_H__ -#define __ARM_KVM_PSCI_H__ - -#define KVM_ARM_PSCI_0_1 1 -#define KVM_ARM_PSCI_0_2 2 - -int kvm_psci_version(struct kvm_vcpu *vcpu); -int kvm_psci_call(struct kvm_vcpu *vcpu); - -#endif /* __ARM_KVM_PSCI_H__ */ --- a/arch/arm/kvm/handle_exit.c +++ b/arch/arm/kvm/handle_exit.c @@ -21,7 +21,7 @@ #include <asm/kvm_emulate.h> #include <asm/kvm_coproc.h> #include <asm/kvm_mmu.h> -#include <asm/kvm_psci.h> +#include <kvm/arm_psci.h> #include <trace/events/kvm.h> #include "trace.h" --- a/arch/arm64/include/asm/kvm_psci.h +++ /dev/null @@ -1,27 +0,0 @@ -/* - * Copyright (C) 2012,2013 - ARM Ltd - * Author: Marc Zyngier <marc.zyngier(a)arm.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#ifndef __ARM64_KVM_PSCI_H__ -#define __ARM64_KVM_PSCI_H__ - -#define KVM_ARM_PSCI_0_1 1 -#define KVM_ARM_PSCI_0_2 2 - -int kvm_psci_version(struct kvm_vcpu *vcpu); -int kvm_psci_call(struct kvm_vcpu *vcpu); - -#endif /* __ARM64_KVM_PSCI_H__ */ --- a/arch/arm64/kvm/handle_exit.c +++ b/arch/arm64/kvm/handle_exit.c @@ -22,12 +22,13 @@ #include <linux/kvm.h> #include <linux/kvm_host.h> +#include <kvm/arm_psci.h> + #include <asm/esr.h> #include <asm/kvm_asm.h> #include <asm/kvm_coproc.h> #include <asm/kvm_emulate.h> #include <asm/kvm_mmu.h> -#include <asm/kvm_psci.h> #include <asm/debug-monitors.h> #define CREATE_TRACE_POINTS --- /dev/null +++ b/include/kvm/arm_psci.h @@ -0,0 +1,27 @@ +/* + * Copyright (C) 2012,2013 - ARM Ltd + * Author: Marc Zyngier <marc.zyngier(a)arm.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __KVM_ARM_PSCI_H__ +#define __KVM_ARM_PSCI_H__ + +#define KVM_ARM_PSCI_0_1 1 +#define KVM_ARM_PSCI_0_2 2 + +int kvm_psci_version(struct kvm_vcpu *vcpu); +int kvm_psci_call(struct kvm_vcpu *vcpu); + +#endif /* __KVM_ARM_PSCI_H__ */ --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -31,6 +31,7 @@ #include <linux/irqbypass.h> #include <trace/events/kvm.h> #include <kvm/arm_pmu.h> +#include <kvm/arm_psci.h> #define CREATE_TRACE_POINTS #include "trace.h" @@ -46,7 +47,6 @@ #include <asm/kvm_mmu.h> #include <asm/kvm_emulate.h> #include <asm/kvm_coproc.h> -#include <asm/kvm_psci.h> #include <asm/sections.h> #ifdef REQUIRES_VIRT --- a/virt/kvm/arm/psci.c +++ b/virt/kvm/arm/psci.c @@ -21,9 +21,10 @@ #include <asm/cputype.h> #include <asm/kvm_emulate.h> -#include <asm/kvm_psci.h> #include <asm/kvm_host.h> +#include <kvm/arm_psci.h> + #include <uapi/linux/psci.h> /* Patches currently in stable-queue which might be from marc.zyngier(a)arm.com are queue-4.15/arm-arm64-smccc-make-function-identifiers-an-unsigned-quantity.patch queue-4.15/arm64-move-bp-hardening-to-check_and_switch_context.patch queue-4.15/arm-arm64-kvm-advertise-smccc-v1.1.patch queue-4.15/arm64-move-post_ttbr_update_workaround-to-c-code.patch queue-4.15/firmware-psci-expose-psci-conduit.patch queue-4.15/arm64-force-kpti-to-be-disabled-on-cavium-thunderx.patch queue-4.15/arm64-entry-apply-bp-hardening-for-high-priority-synchronous-exceptions.patch queue-4.15/arm64-kpti-fix-the-interaction-between-asid-switching-and-software-pan.patch queue-4.15/firmware-psci-expose-smccc-version-through-psci_ops.patch queue-4.15/arm64-implement-branch-predictor-hardening-for-affected-cortex-a-cpus.patch queue-4.15/arm-arm64-kvm-add-psci_version-helper.patch queue-4.15/arm64-kill-psci_get_version-as-a-variant-2-workaround.patch queue-4.15/arm64-entry-apply-bp-hardening-for-suspicious-interrupts-from-el0.patch queue-4.15/arm64-capabilities-handle-duplicate-entries-for-a-capability.patch queue-4.15/arm64-add-arm_smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-kvm-turn-kvm_psci_version-into-a-static-inline.patch queue-4.15/arm-arm64-kvm-implement-psci-1.0-support.patch queue-4.15/arm64-kvm-add-smccc_arch_workaround_1-fast-handling.patch queue-4.15/arm64-kvm-report-smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-smccc-implement-smccc-v1.1-inline-primitive.patch queue-4.15/arm64-idmap-use-awx-flags-for-.idmap.text-.pushsection-directives.patch queue-4.15/arm64-kvm-make-psci_version-a-fast-path.patch queue-4.15/arm64-cpufeature-__this_cpu_has_cap-shouldn-t-stop-early.patch queue-4.15/arm64-kpti-add-enable-callback-to-remap-swapper-using-ng-mappings.patch queue-4.15/arm-arm64-kvm-consolidate-the-psci-include-files.patch queue-4.15/arm64-add-skeleton-to-harden-the-branch-predictor-against-aliasing-attacks.patch queue-4.15/arm-arm64-kvm-add-smccc-accessors-to-psci-code.patch queue-4.15/arm64-kvm-use-per-cpu-vector-when-bp-hardening-is-enabled.patch queue-4.15/arm64-kvm-increment-pc-after-handling-an-smc-trap.patch

6 years, 11 months

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Patch "[Variant 2/Spectre-v2] arm/arm64: KVM: Implement PSCI 1.0 support" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled [Variant 2/Spectre-v2] arm/arm64: KVM: Implement PSCI 1.0 support to the 4.15-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: arm-arm64-kvm-implement-psci-1.0-support.patch and it can be found in the queue-4.15 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 Tue Feb 13 17:25:10 CET 2018 From: Marc Zyngier <marc.zyngier(a)arm.com> Date: Tue, 6 Feb 2018 17:56:11 +0000 Subject: [Variant 2/Spectre-v2] arm/arm64: KVM: Implement PSCI 1.0 support From: Marc Zyngier <marc.zyngier(a)arm.com> Commit 58e0b2239a4d upstream. PSCI 1.0 can be trivially implemented by providing the FEATURES call on top of PSCI 0.2 and returning 1.0 as the PSCI version. We happily ignore everything else, as they are either optional or are clarifications that do not require any additional change. PSCI 1.0 is now the default until we decide to add a userspace selection API. Reviewed-by: Christoffer Dall <christoffer.dall(a)linaro.org> Tested-by: Ard Biesheuvel <ard.biesheuvel(a)linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier(a)arm.com> Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com> Signed-off-by: Will Deacon <will.deacon(a)arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- include/kvm/arm_psci.h | 3 +++ virt/kvm/arm/psci.c | 45 ++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 47 insertions(+), 1 deletion(-) --- a/include/kvm/arm_psci.h +++ b/include/kvm/arm_psci.h @@ -22,6 +22,9 @@ #define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1) #define KVM_ARM_PSCI_0_2 PSCI_VERSION(0, 2) +#define KVM_ARM_PSCI_1_0 PSCI_VERSION(1, 0) + +#define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_0 int kvm_psci_version(struct kvm_vcpu *vcpu); int kvm_psci_call(struct kvm_vcpu *vcpu); --- a/virt/kvm/arm/psci.c +++ b/virt/kvm/arm/psci.c @@ -234,7 +234,7 @@ static void kvm_psci_system_reset(struct int kvm_psci_version(struct kvm_vcpu *vcpu) { if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features)) - return KVM_ARM_PSCI_0_2; + return KVM_ARM_PSCI_LATEST; return KVM_ARM_PSCI_0_1; } @@ -313,6 +313,47 @@ static int kvm_psci_0_2_call(struct kvm_ return ret; } +static int kvm_psci_1_0_call(struct kvm_vcpu *vcpu) +{ + u32 psci_fn = smccc_get_function(vcpu); + u32 feature; + unsigned long val; + int ret = 1; + + switch(psci_fn) { + case PSCI_0_2_FN_PSCI_VERSION: + val = KVM_ARM_PSCI_1_0; + break; + case PSCI_1_0_FN_PSCI_FEATURES: + feature = smccc_get_arg1(vcpu); + switch(feature) { + case PSCI_0_2_FN_PSCI_VERSION: + case PSCI_0_2_FN_CPU_SUSPEND: + case PSCI_0_2_FN64_CPU_SUSPEND: + case PSCI_0_2_FN_CPU_OFF: + case PSCI_0_2_FN_CPU_ON: + case PSCI_0_2_FN64_CPU_ON: + case PSCI_0_2_FN_AFFINITY_INFO: + case PSCI_0_2_FN64_AFFINITY_INFO: + case PSCI_0_2_FN_MIGRATE_INFO_TYPE: + case PSCI_0_2_FN_SYSTEM_OFF: + case PSCI_0_2_FN_SYSTEM_RESET: + case PSCI_1_0_FN_PSCI_FEATURES: + val = 0; + break; + default: + val = PSCI_RET_NOT_SUPPORTED; + break; + } + break; + default: + return kvm_psci_0_2_call(vcpu); + } + + smccc_set_retval(vcpu, val, 0, 0, 0); + return ret; +} + static int kvm_psci_0_1_call(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; @@ -355,6 +396,8 @@ static int kvm_psci_0_1_call(struct kvm_ int kvm_psci_call(struct kvm_vcpu *vcpu) { switch (kvm_psci_version(vcpu)) { + case KVM_ARM_PSCI_1_0: + return kvm_psci_1_0_call(vcpu); case KVM_ARM_PSCI_0_2: return kvm_psci_0_2_call(vcpu); case KVM_ARM_PSCI_0_1: Patches currently in stable-queue which might be from marc.zyngier(a)arm.com are queue-4.15/arm-arm64-smccc-make-function-identifiers-an-unsigned-quantity.patch queue-4.15/arm64-move-bp-hardening-to-check_and_switch_context.patch queue-4.15/arm-arm64-kvm-advertise-smccc-v1.1.patch queue-4.15/arm64-move-post_ttbr_update_workaround-to-c-code.patch queue-4.15/firmware-psci-expose-psci-conduit.patch queue-4.15/arm64-force-kpti-to-be-disabled-on-cavium-thunderx.patch queue-4.15/arm64-entry-apply-bp-hardening-for-high-priority-synchronous-exceptions.patch queue-4.15/arm64-kpti-fix-the-interaction-between-asid-switching-and-software-pan.patch queue-4.15/firmware-psci-expose-smccc-version-through-psci_ops.patch queue-4.15/arm64-implement-branch-predictor-hardening-for-affected-cortex-a-cpus.patch queue-4.15/arm-arm64-kvm-add-psci_version-helper.patch queue-4.15/arm64-kill-psci_get_version-as-a-variant-2-workaround.patch queue-4.15/arm64-entry-apply-bp-hardening-for-suspicious-interrupts-from-el0.patch queue-4.15/arm64-capabilities-handle-duplicate-entries-for-a-capability.patch queue-4.15/arm64-add-arm_smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-kvm-turn-kvm_psci_version-into-a-static-inline.patch queue-4.15/arm-arm64-kvm-implement-psci-1.0-support.patch queue-4.15/arm64-kvm-add-smccc_arch_workaround_1-fast-handling.patch queue-4.15/arm64-kvm-report-smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-smccc-implement-smccc-v1.1-inline-primitive.patch queue-4.15/arm64-idmap-use-awx-flags-for-.idmap.text-.pushsection-directives.patch queue-4.15/arm64-kvm-make-psci_version-a-fast-path.patch queue-4.15/arm64-cpufeature-__this_cpu_has_cap-shouldn-t-stop-early.patch queue-4.15/arm64-kpti-add-enable-callback-to-remap-swapper-using-ng-mappings.patch queue-4.15/arm-arm64-kvm-consolidate-the-psci-include-files.patch queue-4.15/arm64-add-skeleton-to-harden-the-branch-predictor-against-aliasing-attacks.patch queue-4.15/arm-arm64-kvm-add-smccc-accessors-to-psci-code.patch queue-4.15/arm64-kvm-use-per-cpu-vector-when-bp-hardening-is-enabled.patch queue-4.15/arm64-kvm-increment-pc-after-handling-an-smc-trap.patch

6 years, 11 months

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Patch "[Variant 2/Spectre-v2] arm/arm64: KVM: Advertise SMCCC v1.1" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled [Variant 2/Spectre-v2] arm/arm64: KVM: Advertise SMCCC v1.1 to the 4.15-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: arm-arm64-kvm-advertise-smccc-v1.1.patch and it can be found in the queue-4.15 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 Tue Feb 13 17:25:10 CET 2018 From: Marc Zyngier <marc.zyngier(a)arm.com> Date: Tue, 6 Feb 2018 17:56:12 +0000 Subject: [Variant 2/Spectre-v2] arm/arm64: KVM: Advertise SMCCC v1.1 From: Marc Zyngier <marc.zyngier(a)arm.com> Commit 09e6be12effd upstream. The new SMC Calling Convention (v1.1) allows for a reduced overhead when calling into the firmware, and provides a new feature discovery mechanism. Make it visible to KVM guests. Tested-by: Ard Biesheuvel <ard.biesheuvel(a)linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall(a)linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier(a)arm.com> Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com> Signed-off-by: Will Deacon <will.deacon(a)arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/arm/kvm/handle_exit.c | 2 +- arch/arm64/kvm/handle_exit.c | 2 +- include/kvm/arm_psci.h | 2 +- include/linux/arm-smccc.h | 13 +++++++++++++ virt/kvm/arm/psci.c | 24 +++++++++++++++++++++++- 5 files changed, 39 insertions(+), 4 deletions(-) --- a/arch/arm/kvm/handle_exit.c +++ b/arch/arm/kvm/handle_exit.c @@ -36,7 +36,7 @@ static int handle_hvc(struct kvm_vcpu *v kvm_vcpu_hvc_get_imm(vcpu)); vcpu->stat.hvc_exit_stat++; - ret = kvm_psci_call(vcpu); + ret = kvm_hvc_call_handler(vcpu); if (ret < 0) { kvm_inject_undefined(vcpu); return 1; --- a/arch/arm64/kvm/handle_exit.c +++ b/arch/arm64/kvm/handle_exit.c @@ -44,7 +44,7 @@ static int handle_hvc(struct kvm_vcpu *v kvm_vcpu_hvc_get_imm(vcpu)); vcpu->stat.hvc_exit_stat++; - ret = kvm_psci_call(vcpu); + ret = kvm_hvc_call_handler(vcpu); if (ret < 0) { vcpu_set_reg(vcpu, 0, ~0UL); return 1; --- a/include/kvm/arm_psci.h +++ b/include/kvm/arm_psci.h @@ -27,6 +27,6 @@ #define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_0 int kvm_psci_version(struct kvm_vcpu *vcpu); -int kvm_psci_call(struct kvm_vcpu *vcpu); +int kvm_hvc_call_handler(struct kvm_vcpu *vcpu); #endif /* __KVM_ARM_PSCI_H__ */ --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -60,6 +60,19 @@ #define ARM_SMCCC_QUIRK_NONE 0 #define ARM_SMCCC_QUIRK_QCOM_A6 1 /* Save/restore register a6 */ +#define ARM_SMCCC_VERSION_1_0 0x10000 +#define ARM_SMCCC_VERSION_1_1 0x10001 + +#define ARM_SMCCC_VERSION_FUNC_ID \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + 0, 0) + +#define ARM_SMCCC_ARCH_FEATURES_FUNC_ID \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + 0, 1) + #ifndef __ASSEMBLY__ #include <linux/linkage.h> --- a/virt/kvm/arm/psci.c +++ b/virt/kvm/arm/psci.c @@ -15,6 +15,7 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ +#include <linux/arm-smccc.h> #include <linux/preempt.h> #include <linux/kvm_host.h> #include <linux/wait.h> @@ -339,6 +340,7 @@ static int kvm_psci_1_0_call(struct kvm_ case PSCI_0_2_FN_SYSTEM_OFF: case PSCI_0_2_FN_SYSTEM_RESET: case PSCI_1_0_FN_PSCI_FEATURES: + case ARM_SMCCC_VERSION_FUNC_ID: val = 0; break; default: @@ -393,7 +395,7 @@ static int kvm_psci_0_1_call(struct kvm_ * Errors: * -EINVAL: Unrecognized PSCI function */ -int kvm_psci_call(struct kvm_vcpu *vcpu) +static int kvm_psci_call(struct kvm_vcpu *vcpu) { switch (kvm_psci_version(vcpu)) { case KVM_ARM_PSCI_1_0: @@ -406,3 +408,23 @@ int kvm_psci_call(struct kvm_vcpu *vcpu) return -EINVAL; }; } + +int kvm_hvc_call_handler(struct kvm_vcpu *vcpu) +{ + u32 func_id = smccc_get_function(vcpu); + u32 val = PSCI_RET_NOT_SUPPORTED; + + switch (func_id) { + case ARM_SMCCC_VERSION_FUNC_ID: + val = ARM_SMCCC_VERSION_1_1; + break; + case ARM_SMCCC_ARCH_FEATURES_FUNC_ID: + /* Nothing supported yet */ + break; + default: + return kvm_psci_call(vcpu); + } + + smccc_set_retval(vcpu, val, 0, 0, 0); + return 1; +} Patches currently in stable-queue which might be from marc.zyngier(a)arm.com are queue-4.15/arm-arm64-smccc-make-function-identifiers-an-unsigned-quantity.patch queue-4.15/arm64-move-bp-hardening-to-check_and_switch_context.patch queue-4.15/arm-arm64-kvm-advertise-smccc-v1.1.patch queue-4.15/arm64-move-post_ttbr_update_workaround-to-c-code.patch queue-4.15/firmware-psci-expose-psci-conduit.patch queue-4.15/arm64-force-kpti-to-be-disabled-on-cavium-thunderx.patch queue-4.15/arm64-entry-apply-bp-hardening-for-high-priority-synchronous-exceptions.patch queue-4.15/arm64-kpti-fix-the-interaction-between-asid-switching-and-software-pan.patch queue-4.15/firmware-psci-expose-smccc-version-through-psci_ops.patch queue-4.15/arm64-implement-branch-predictor-hardening-for-affected-cortex-a-cpus.patch queue-4.15/arm-arm64-kvm-add-psci_version-helper.patch queue-4.15/arm64-kill-psci_get_version-as-a-variant-2-workaround.patch queue-4.15/arm64-entry-apply-bp-hardening-for-suspicious-interrupts-from-el0.patch queue-4.15/arm64-capabilities-handle-duplicate-entries-for-a-capability.patch queue-4.15/arm64-add-arm_smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-kvm-turn-kvm_psci_version-into-a-static-inline.patch queue-4.15/arm-arm64-kvm-implement-psci-1.0-support.patch queue-4.15/arm64-kvm-add-smccc_arch_workaround_1-fast-handling.patch queue-4.15/arm64-kvm-report-smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-smccc-implement-smccc-v1.1-inline-primitive.patch queue-4.15/arm64-idmap-use-awx-flags-for-.idmap.text-.pushsection-directives.patch queue-4.15/arm64-kvm-make-psci_version-a-fast-path.patch queue-4.15/arm64-cpufeature-__this_cpu_has_cap-shouldn-t-stop-early.patch queue-4.15/arm64-kpti-add-enable-callback-to-remap-swapper-using-ng-mappings.patch queue-4.15/arm-arm64-kvm-consolidate-the-psci-include-files.patch queue-4.15/arm64-add-skeleton-to-harden-the-branch-predictor-against-aliasing-attacks.patch queue-4.15/arm-arm64-kvm-add-smccc-accessors-to-psci-code.patch queue-4.15/arm64-kvm-use-per-cpu-vector-when-bp-hardening-is-enabled.patch queue-4.15/arm64-kvm-increment-pc-after-handling-an-smc-trap.patch

6 years, 11 months

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Patch "[Variant 2/Spectre-v2] arm/arm64: KVM: Add PSCI_VERSION helper" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled [Variant 2/Spectre-v2] arm/arm64: KVM: Add PSCI_VERSION helper to the 4.15-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: arm-arm64-kvm-add-psci_version-helper.patch and it can be found in the queue-4.15 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 Tue Feb 13 17:25:10 CET 2018 From: Marc Zyngier <marc.zyngier(a)arm.com> Date: Tue, 6 Feb 2018 17:56:09 +0000 Subject: [Variant 2/Spectre-v2] arm/arm64: KVM: Add PSCI_VERSION helper From: Marc Zyngier <marc.zyngier(a)arm.com> Commit d0a144f12a7c upstream. As we're about to trigger a PSCI version explosion, it doesn't hurt to introduce a PSCI_VERSION helper that is going to be used everywhere. Reviewed-by: Christoffer Dall <christoffer.dall(a)linaro.org> Tested-by: Ard Biesheuvel <ard.biesheuvel(a)linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier(a)arm.com> Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com> Signed-off-by: Will Deacon <will.deacon(a)arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- include/kvm/arm_psci.h | 6 ++++-- include/uapi/linux/psci.h | 3 +++ virt/kvm/arm/psci.c | 4 +--- 3 files changed, 8 insertions(+), 5 deletions(-) --- a/include/kvm/arm_psci.h +++ b/include/kvm/arm_psci.h @@ -18,8 +18,10 @@ #ifndef __KVM_ARM_PSCI_H__ #define __KVM_ARM_PSCI_H__ -#define KVM_ARM_PSCI_0_1 1 -#define KVM_ARM_PSCI_0_2 2 +#include <uapi/linux/psci.h> + +#define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1) +#define KVM_ARM_PSCI_0_2 PSCI_VERSION(0, 2) int kvm_psci_version(struct kvm_vcpu *vcpu); int kvm_psci_call(struct kvm_vcpu *vcpu); --- a/include/uapi/linux/psci.h +++ b/include/uapi/linux/psci.h @@ -88,6 +88,9 @@ (((ver) & PSCI_VERSION_MAJOR_MASK) >> PSCI_VERSION_MAJOR_SHIFT) #define PSCI_VERSION_MINOR(ver) \ ((ver) & PSCI_VERSION_MINOR_MASK) +#define PSCI_VERSION(maj, min) \ + ((((maj) << PSCI_VERSION_MAJOR_SHIFT) & PSCI_VERSION_MAJOR_MASK) | \ + ((min) & PSCI_VERSION_MINOR_MASK)) /* PSCI features decoding (>=1.0) */ #define PSCI_1_0_FEATURES_CPU_SUSPEND_PF_SHIFT 1 --- a/virt/kvm/arm/psci.c +++ b/virt/kvm/arm/psci.c @@ -25,8 +25,6 @@ #include <kvm/arm_psci.h> -#include <uapi/linux/psci.h> - /* * This is an implementation of the Power State Coordination Interface * as described in ARM document number ARM DEN 0022A. @@ -222,7 +220,7 @@ static int kvm_psci_0_2_call(struct kvm_ * Bits[31:16] = Major Version = 0 * Bits[15:0] = Minor Version = 2 */ - val = 2; + val = KVM_ARM_PSCI_0_2; break; case PSCI_0_2_FN_CPU_SUSPEND: case PSCI_0_2_FN64_CPU_SUSPEND: Patches currently in stable-queue which might be from marc.zyngier(a)arm.com are queue-4.15/arm-arm64-smccc-make-function-identifiers-an-unsigned-quantity.patch queue-4.15/arm64-move-bp-hardening-to-check_and_switch_context.patch queue-4.15/arm-arm64-kvm-advertise-smccc-v1.1.patch queue-4.15/arm64-move-post_ttbr_update_workaround-to-c-code.patch queue-4.15/firmware-psci-expose-psci-conduit.patch queue-4.15/arm64-force-kpti-to-be-disabled-on-cavium-thunderx.patch queue-4.15/arm64-entry-apply-bp-hardening-for-high-priority-synchronous-exceptions.patch queue-4.15/arm64-kpti-fix-the-interaction-between-asid-switching-and-software-pan.patch queue-4.15/firmware-psci-expose-smccc-version-through-psci_ops.patch queue-4.15/arm64-implement-branch-predictor-hardening-for-affected-cortex-a-cpus.patch queue-4.15/arm-arm64-kvm-add-psci_version-helper.patch queue-4.15/arm64-kill-psci_get_version-as-a-variant-2-workaround.patch queue-4.15/arm64-entry-apply-bp-hardening-for-suspicious-interrupts-from-el0.patch queue-4.15/arm64-capabilities-handle-duplicate-entries-for-a-capability.patch queue-4.15/arm64-add-arm_smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-kvm-turn-kvm_psci_version-into-a-static-inline.patch queue-4.15/arm-arm64-kvm-implement-psci-1.0-support.patch queue-4.15/arm64-kvm-add-smccc_arch_workaround_1-fast-handling.patch queue-4.15/arm64-kvm-report-smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-smccc-implement-smccc-v1.1-inline-primitive.patch queue-4.15/arm64-idmap-use-awx-flags-for-.idmap.text-.pushsection-directives.patch queue-4.15/arm64-kvm-make-psci_version-a-fast-path.patch queue-4.15/arm64-cpufeature-__this_cpu_has_cap-shouldn-t-stop-early.patch queue-4.15/arm64-kpti-add-enable-callback-to-remap-swapper-using-ng-mappings.patch queue-4.15/arm-arm64-kvm-consolidate-the-psci-include-files.patch queue-4.15/arm64-add-skeleton-to-harden-the-branch-predictor-against-aliasing-attacks.patch queue-4.15/arm-arm64-kvm-add-smccc-accessors-to-psci-code.patch queue-4.15/arm64-kvm-use-per-cpu-vector-when-bp-hardening-is-enabled.patch queue-4.15/arm64-kvm-increment-pc-after-handling-an-smc-trap.patch

6 years, 11 months

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Patch "[Variant 2/Spectre-v2] arm/arm64: KVM: Add smccc accessors to PSCI code" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled [Variant 2/Spectre-v2] arm/arm64: KVM: Add smccc accessors to PSCI code to the 4.15-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: arm-arm64-kvm-add-smccc-accessors-to-psci-code.patch and it can be found in the queue-4.15 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 Tue Feb 13 17:25:10 CET 2018 From: Marc Zyngier <marc.zyngier(a)arm.com> Date: Tue, 6 Feb 2018 17:56:10 +0000 Subject: [Variant 2/Spectre-v2] arm/arm64: KVM: Add smccc accessors to PSCI code From: Marc Zyngier <marc.zyngier(a)arm.com> Commit 84684fecd7ea upstream. Instead of open coding the accesses to the various registers, let's add explicit SMCCC accessors. Reviewed-by: Christoffer Dall <christoffer.dall(a)linaro.org> Tested-by: Ard Biesheuvel <ard.biesheuvel(a)linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier(a)arm.com> Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com> Signed-off-by: Will Deacon <will.deacon(a)arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- virt/kvm/arm/psci.c | 52 ++++++++++++++++++++++++++++++++++++++++++---------- 1 file changed, 42 insertions(+), 10 deletions(-) --- a/virt/kvm/arm/psci.c +++ b/virt/kvm/arm/psci.c @@ -32,6 +32,38 @@ #define AFFINITY_MASK(level) ~((0x1UL << ((level) * MPIDR_LEVEL_BITS)) - 1) +static u32 smccc_get_function(struct kvm_vcpu *vcpu) +{ + return vcpu_get_reg(vcpu, 0); +} + +static unsigned long smccc_get_arg1(struct kvm_vcpu *vcpu) +{ + return vcpu_get_reg(vcpu, 1); +} + +static unsigned long smccc_get_arg2(struct kvm_vcpu *vcpu) +{ + return vcpu_get_reg(vcpu, 2); +} + +static unsigned long smccc_get_arg3(struct kvm_vcpu *vcpu) +{ + return vcpu_get_reg(vcpu, 3); +} + +static void smccc_set_retval(struct kvm_vcpu *vcpu, + unsigned long a0, + unsigned long a1, + unsigned long a2, + unsigned long a3) +{ + vcpu_set_reg(vcpu, 0, a0); + vcpu_set_reg(vcpu, 1, a1); + vcpu_set_reg(vcpu, 2, a2); + vcpu_set_reg(vcpu, 3, a3); +} + static unsigned long psci_affinity_mask(unsigned long affinity_level) { if (affinity_level <= 3) @@ -77,7 +109,7 @@ static unsigned long kvm_psci_vcpu_on(st unsigned long context_id; phys_addr_t target_pc; - cpu_id = vcpu_get_reg(source_vcpu, 1) & MPIDR_HWID_BITMASK; + cpu_id = smccc_get_arg1(source_vcpu) & MPIDR_HWID_BITMASK; if (vcpu_mode_is_32bit(source_vcpu)) cpu_id &= ~((u32) 0); @@ -96,8 +128,8 @@ static unsigned long kvm_psci_vcpu_on(st return PSCI_RET_INVALID_PARAMS; } - target_pc = vcpu_get_reg(source_vcpu, 2); - context_id = vcpu_get_reg(source_vcpu, 3); + target_pc = smccc_get_arg2(source_vcpu); + context_id = smccc_get_arg3(source_vcpu); kvm_reset_vcpu(vcpu); @@ -116,7 +148,7 @@ static unsigned long kvm_psci_vcpu_on(st * NOTE: We always update r0 (or x0) because for PSCI v0.1 * the general puspose registers are undefined upon CPU_ON. */ - vcpu_set_reg(vcpu, 0, context_id); + smccc_set_retval(vcpu, context_id, 0, 0, 0); vcpu->arch.power_off = false; smp_mb(); /* Make sure the above is visible */ @@ -136,8 +168,8 @@ static unsigned long kvm_psci_vcpu_affin struct kvm *kvm = vcpu->kvm; struct kvm_vcpu *tmp; - target_affinity = vcpu_get_reg(vcpu, 1); - lowest_affinity_level = vcpu_get_reg(vcpu, 2); + target_affinity = smccc_get_arg1(vcpu); + lowest_affinity_level = smccc_get_arg2(vcpu); /* Determine target affinity mask */ target_affinity_mask = psci_affinity_mask(lowest_affinity_level); @@ -210,7 +242,7 @@ int kvm_psci_version(struct kvm_vcpu *vc static int kvm_psci_0_2_call(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; - unsigned long psci_fn = vcpu_get_reg(vcpu, 0) & ~((u32) 0); + u32 psci_fn = smccc_get_function(vcpu); unsigned long val; int ret = 1; @@ -277,14 +309,14 @@ static int kvm_psci_0_2_call(struct kvm_ break; } - vcpu_set_reg(vcpu, 0, val); + smccc_set_retval(vcpu, val, 0, 0, 0); return ret; } static int kvm_psci_0_1_call(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; - unsigned long psci_fn = vcpu_get_reg(vcpu, 0) & ~((u32) 0); + u32 psci_fn = smccc_get_function(vcpu); unsigned long val; switch (psci_fn) { @@ -302,7 +334,7 @@ static int kvm_psci_0_1_call(struct kvm_ break; } - vcpu_set_reg(vcpu, 0, val); + smccc_set_retval(vcpu, val, 0, 0, 0); return 1; } Patches currently in stable-queue which might be from marc.zyngier(a)arm.com are queue-4.15/arm-arm64-smccc-make-function-identifiers-an-unsigned-quantity.patch queue-4.15/arm64-move-bp-hardening-to-check_and_switch_context.patch queue-4.15/arm-arm64-kvm-advertise-smccc-v1.1.patch queue-4.15/arm64-move-post_ttbr_update_workaround-to-c-code.patch queue-4.15/firmware-psci-expose-psci-conduit.patch queue-4.15/arm64-force-kpti-to-be-disabled-on-cavium-thunderx.patch queue-4.15/arm64-entry-apply-bp-hardening-for-high-priority-synchronous-exceptions.patch queue-4.15/arm64-kpti-fix-the-interaction-between-asid-switching-and-software-pan.patch queue-4.15/firmware-psci-expose-smccc-version-through-psci_ops.patch queue-4.15/arm64-implement-branch-predictor-hardening-for-affected-cortex-a-cpus.patch queue-4.15/arm-arm64-kvm-add-psci_version-helper.patch queue-4.15/arm64-kill-psci_get_version-as-a-variant-2-workaround.patch queue-4.15/arm64-entry-apply-bp-hardening-for-suspicious-interrupts-from-el0.patch queue-4.15/arm64-capabilities-handle-duplicate-entries-for-a-capability.patch queue-4.15/arm64-add-arm_smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-kvm-turn-kvm_psci_version-into-a-static-inline.patch queue-4.15/arm-arm64-kvm-implement-psci-1.0-support.patch queue-4.15/arm64-kvm-add-smccc_arch_workaround_1-fast-handling.patch queue-4.15/arm64-kvm-report-smccc_arch_workaround_1-bp-hardening-support.patch queue-4.15/arm-arm64-smccc-implement-smccc-v1.1-inline-primitive.patch queue-4.15/arm64-idmap-use-awx-flags-for-.idmap.text-.pushsection-directives.patch queue-4.15/arm64-kvm-make-psci_version-a-fast-path.patch queue-4.15/arm64-cpufeature-__this_cpu_has_cap-shouldn-t-stop-early.patch queue-4.15/arm64-kpti-add-enable-callback-to-remap-swapper-using-ng-mappings.patch queue-4.15/arm-arm64-kvm-consolidate-the-psci-include-files.patch queue-4.15/arm64-add-skeleton-to-harden-the-branch-predictor-against-aliasing-attacks.patch queue-4.15/arm-arm64-kvm-add-smccc-accessors-to-psci-code.patch queue-4.15/arm64-kvm-use-per-cpu-vector-when-bp-hardening-is-enabled.patch queue-4.15/arm64-kvm-increment-pc-after-handling-an-smc-trap.patch

6 years, 11 months

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Patch "media: hdpvr: Fix an error handling path in hdpvr_probe()" has been added to the 4.14-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled media: hdpvr: Fix an error handling path in hdpvr_probe() to the 4.14-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: media-hdpvr-fix-an-error-handling-path-in-hdpvr_probe.patch and it can be found in the queue-4.14 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 c0f71bbb810237a38734607ca4599632f7f5d47f Mon Sep 17 00:00:00 2001 From: Arvind Yadav <arvind.yadav.cs(a)gmail.com> Date: Fri, 22 Sep 2017 09:07:06 -0400 Subject: media: hdpvr: Fix an error handling path in hdpvr_probe() From: Arvind Yadav <arvind.yadav.cs(a)gmail.com> commit c0f71bbb810237a38734607ca4599632f7f5d47f upstream. Here, hdpvr_register_videodev() is responsible for setup and register a video device. Also defining and initializing a worker. hdpvr_register_videodev() is calling by hdpvr_probe at last. So no need to flush any work here. Unregister v4l2, free buffers and memory. If hdpvr_probe() will fail. Signed-off-by: Arvind Yadav <arvind.yadav.cs(a)gmail.com> Reported-by: Andrey Konovalov <andreyknvl(a)google.com> Tested-by: Andrey Konovalov <andreyknvl(a)google.com> Signed-off-by: Hans Verkuil <hans.verkuil(a)cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab(a)s-opensource.com> Cc: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/media/usb/hdpvr/hdpvr-core.c | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) --- a/drivers/media/usb/hdpvr/hdpvr-core.c +++ b/drivers/media/usb/hdpvr/hdpvr-core.c @@ -292,7 +292,7 @@ static int hdpvr_probe(struct usb_interf /* register v4l2_device early so it can be used for printks */ if (v4l2_device_register(&interface->dev, &dev->v4l2_dev)) { dev_err(&interface->dev, "v4l2_device_register failed\n"); - goto error; + goto error_free_dev; } mutex_init(&dev->io_mutex); @@ -301,7 +301,7 @@ static int hdpvr_probe(struct usb_interf dev->usbc_buf = kmalloc(64, GFP_KERNEL); if (!dev->usbc_buf) { v4l2_err(&dev->v4l2_dev, "Out of memory\n"); - goto error; + goto error_v4l2_unregister; } init_waitqueue_head(&dev->wait_buffer); @@ -339,13 +339,13 @@ static int hdpvr_probe(struct usb_interf } if (!dev->bulk_in_endpointAddr) { v4l2_err(&dev->v4l2_dev, "Could not find bulk-in endpoint\n"); - goto error; + goto error_put_usb; } /* init the device */ if (hdpvr_device_init(dev)) { v4l2_err(&dev->v4l2_dev, "device init failed\n"); - goto error; + goto error_put_usb; } mutex_lock(&dev->io_mutex); @@ -353,7 +353,7 @@ static int hdpvr_probe(struct usb_interf mutex_unlock(&dev->io_mutex); v4l2_err(&dev->v4l2_dev, "allocating transfer buffers failed\n"); - goto error; + goto error_put_usb; } mutex_unlock(&dev->io_mutex); @@ -361,7 +361,7 @@ static int hdpvr_probe(struct usb_interf retval = hdpvr_register_i2c_adapter(dev); if (retval < 0) { v4l2_err(&dev->v4l2_dev, "i2c adapter register failed\n"); - goto error; + goto error_free_buffers; } client = hdpvr_register_ir_rx_i2c(dev); @@ -394,13 +394,17 @@ static int hdpvr_probe(struct usb_interf reg_fail: #if IS_ENABLED(CONFIG_I2C) i2c_del_adapter(&dev->i2c_adapter); +error_free_buffers: #endif + hdpvr_free_buffers(dev); +error_put_usb: + usb_put_dev(dev->udev); + kfree(dev->usbc_buf); +error_v4l2_unregister: + v4l2_device_unregister(&dev->v4l2_dev); +error_free_dev: + kfree(dev); error: - if (dev) { - flush_work(&dev->worker); - /* this frees allocated memory */ - hdpvr_delete(dev); - } return retval; } Patches currently in stable-queue which might be from arvind.yadav.cs(a)gmail.com are queue-4.14/media-hdpvr-fix-an-error-handling-path-in-hdpvr_probe.patch

6 years, 11 months

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Patch "media: dvb-usb-v2: lmedm04: move ts2020 attach to dm04_lme2510_tuner" has been added to the 4.14-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled media: dvb-usb-v2: lmedm04: move ts2020 attach to dm04_lme2510_tuner to the 4.14-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: media-dvb-usb-v2-lmedm04-move-ts2020-attach-to-dm04_lme2510_tuner.patch and it can be found in the queue-4.14 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 7bf7a7116ed313c601307f7e585419369926ab05 Mon Sep 17 00:00:00 2001 From: Malcolm Priestley <tvboxspy(a)gmail.com> Date: Tue, 26 Sep 2017 17:10:21 -0400 Subject: media: dvb-usb-v2: lmedm04: move ts2020 attach to dm04_lme2510_tuner From: Malcolm Priestley <tvboxspy(a)gmail.com> commit 7bf7a7116ed313c601307f7e585419369926ab05 upstream. When the tuner was split from m88rs2000 the attach function is in wrong place. Move to dm04_lme2510_tuner to trap errors on failure and removing a call to lme_coldreset. Prevents driver starting up without any tuner connected. Fixes to trap for ts2020 fail. LME2510(C): FE Found M88RS2000 ts2020: probe of 0-0060 failed with error -11 ... LME2510(C): TUN Found RS2000 tuner kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Reported-by: Andrey Konovalov <andreyknvl(a)google.com> Signed-off-by: Malcolm Priestley <tvboxspy(a)gmail.com> Tested-by: Andrey Konovalov <andreyknvl(a)google.com> Signed-off-by: Mauro Carvalho Chehab <mchehab(a)s-opensource.com> Cc: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/media/usb/dvb-usb-v2/lmedm04.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) --- a/drivers/media/usb/dvb-usb-v2/lmedm04.c +++ b/drivers/media/usb/dvb-usb-v2/lmedm04.c @@ -1076,8 +1076,6 @@ static int dm04_lme2510_frontend_attach( if (adap->fe[0]) { info("FE Found M88RS2000"); - dvb_attach(ts2020_attach, adap->fe[0], &ts2020_config, - &d->i2c_adap); st->i2c_tuner_gate_w = 5; st->i2c_tuner_gate_r = 5; st->i2c_tuner_addr = 0x60; @@ -1143,17 +1141,18 @@ static int dm04_lme2510_tuner(struct dvb ret = st->tuner_config; break; case TUNER_RS2000: - ret = st->tuner_config; + if (dvb_attach(ts2020_attach, adap->fe[0], + &ts2020_config, &d->i2c_adap)) + ret = st->tuner_config; break; default: break; } - if (ret) + if (ret) { info("TUN Found %s tuner", tun_msg[ret]); - else { - info("TUN No tuner found --- resetting device"); - lme_coldreset(d); + } else { + info("TUN No tuner found"); return -ENODEV; } Patches currently in stable-queue which might be from tvboxspy(a)gmail.com are queue-4.14/media-dvb-usb-v2-lmedm04-move-ts2020-attach-to-dm04_lme2510_tuner.patch queue-4.14/media-dvb-usb-v2-lmedm04-improve-logic-checking-of-warm-start.patch

6 years, 11 months

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Patch "media: dvb-usb-v2: lmedm04: Improve logic checking of warm start" has been added to the 4.14-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled media: dvb-usb-v2: lmedm04: Improve logic checking of warm start to the 4.14-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: media-dvb-usb-v2-lmedm04-improve-logic-checking-of-warm-start.patch and it can be found in the queue-4.14 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 3d932ee27e852e4904647f15b64dedca51187ad7 Mon Sep 17 00:00:00 2001 From: Malcolm Priestley <tvboxspy(a)gmail.com> Date: Tue, 26 Sep 2017 17:10:20 -0400 Subject: media: dvb-usb-v2: lmedm04: Improve logic checking of warm start From: Malcolm Priestley <tvboxspy(a)gmail.com> commit 3d932ee27e852e4904647f15b64dedca51187ad7 upstream. Warm start has no check as whether a genuine device has connected and proceeds to next execution path. Check device should read 0x47 at offset of 2 on USB descriptor read and it is the amount requested of 6 bytes. Fix for kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access as Reported-by: Andrey Konovalov <andreyknvl(a)google.com> Signed-off-by: Malcolm Priestley <tvboxspy(a)gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab(a)s-opensource.com> Cc: Ben Hutchings <ben.hutchings(a)codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/media/usb/dvb-usb-v2/lmedm04.c | 26 ++++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-) --- a/drivers/media/usb/dvb-usb-v2/lmedm04.c +++ b/drivers/media/usb/dvb-usb-v2/lmedm04.c @@ -494,18 +494,23 @@ static int lme2510_pid_filter(struct dvb static int lme2510_return_status(struct dvb_usb_device *d) { - int ret = 0; + int ret; u8 *data; - data = kzalloc(10, GFP_KERNEL); + data = kzalloc(6, GFP_KERNEL); if (!data) return -ENOMEM; - ret |= usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), - 0x06, 0x80, 0x0302, 0x00, data, 0x0006, 200); - info("Firmware Status: %x (%x)", ret , data[2]); + ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), + 0x06, 0x80, 0x0302, 0x00, + data, 0x6, 200); + if (ret != 6) + ret = -EINVAL; + else + ret = data[2]; + + info("Firmware Status: %6ph", data); - ret = (ret < 0) ? -ENODEV : data[2]; kfree(data); return ret; } @@ -1189,6 +1194,7 @@ static int lme2510_get_adapter_count(str static int lme2510_identify_state(struct dvb_usb_device *d, const char **name) { struct lme2510_state *st = d->priv; + int status; usb_reset_configuration(d->udev); @@ -1197,12 +1203,16 @@ static int lme2510_identify_state(struct st->dvb_usb_lme2510_firmware = dvb_usb_lme2510_firmware; - if (lme2510_return_status(d) == 0x44) { + status = lme2510_return_status(d); + if (status == 0x44) { *name = lme_firmware_switch(d, 0); return COLD; } - return 0; + if (status != 0x47) + return -EINVAL; + + return WARM; } static int lme2510_get_stream_config(struct dvb_frontend *fe, u8 *ts_type, Patches currently in stable-queue which might be from tvboxspy(a)gmail.com are queue-4.14/media-dvb-usb-v2-lmedm04-move-ts2020-attach-to-dm04_lme2510_tuner.patch queue-4.14/media-dvb-usb-v2-lmedm04-improve-logic-checking-of-warm-start.patch

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Linux-stable-mirror February 2018