November 2022 - Linux-stable-mirror

[PATCH 2/2] drm/display/dp_mst: Fix drm_dp_mst_add_affected_dsc_crtcs() return code

by Lyude Paul

Looks like that we're accidentally dropping a pretty important return code here. For some reason, we just return -EINVAL if we fail to get the MST topology state. This is wrong: error codes are important and should never be squashed without being handled, which here seems to have the potential to cause a deadlock. Signed-off-by: Lyude Paul <lyude(a)redhat.com> Fixes: 8ec046716ca8 ("drm/dp_mst: Add helper to trigger modeset on affected DSC MST CRTCs") Cc: <stable(a)vger.kernel.org> # v5.6+ --- drivers/gpu/drm/display/drm_dp_mst_topology.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c index ecd22c038c8c0..51a46689cda70 100644 --- a/drivers/gpu/drm/display/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c @@ -5186,7 +5186,7 @@ int drm_dp_mst_add_affected_dsc_crtcs(struct drm_atomic_state *state, struct drm mst_state = drm_atomic_get_mst_topology_state(state, mgr); if (IS_ERR(mst_state)) - return -EINVAL; + return PTR_ERR(mst_state); list_for_each_entry(pos, &mst_state->payloads, next) { -- 2.37.3

1 year, 11 months

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[PATCH v2 7/8] KVM: SVM: move MSR_IA32_SPEC_CTRL save/restore to assembly

by Paolo Bonzini

Restoration of the host IA32_SPEC_CTRL value is probably too late with respect to the return thunk training sequence. With respect to the user/kernel boundary, AMD says, "If software chooses to toggle STIBP (e.g., set STIBP on kernel entry, and clear it on kernel exit), software should set STIBP to 1 before executing the return thunk training sequence." I assume the same requirements apply to the guest/host boundary. The return thunk training sequence is in vmenter.S, quite close to the VM-exit. On hosts without V_SPEC_CTRL, however, the host's IA32_SPEC_CTRL value is not restored until much later. To avoid this, move the restoration of host SPEC_CTRL to assembly and, for consistency, move the restoration of the guest SPEC_CTRL as well. This is not particularly difficult, apart from some care to cover both 32- and 64-bit, and to share code between SEV-ES and normal vmentry. Cc: stable(a)vger.kernel.org Fixes: a149180fbcf3 ("x86: Add magic AMD return-thunk") Suggested-by: Jim Mattson <jmattson(a)google.com> Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> --- arch/x86/kernel/cpu/bugs.c | 13 +---- arch/x86/kvm/kvm-asm-offsets.c | 1 + arch/x86/kvm/svm/svm.c | 38 +++++------- arch/x86/kvm/svm/svm.h | 4 +- arch/x86/kvm/svm/vmenter.S | 102 ++++++++++++++++++++++++++++++++- 5 files changed, 121 insertions(+), 37 deletions(-) diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index da7c361f47e0..6ec0b7ce7453 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -196,22 +196,15 @@ void __init check_bugs(void) } /* - * NOTE: This function is *only* called for SVM. VMX spec_ctrl handling is - * done in vmenter.S. + * NOTE: This function is *only* called for SVM, since Intel uses + * MSR_IA32_SPEC_CTRL for SSBD. */ void x86_virt_spec_ctrl(u64 guest_spec_ctrl, u64 guest_virt_spec_ctrl, bool setguest) { - u64 msrval, guestval = guest_spec_ctrl, hostval = spec_ctrl_current(); + u64 guestval, hostval; struct thread_info *ti = current_thread_info(); - if (static_cpu_has(X86_FEATURE_MSR_SPEC_CTRL)) { - if (hostval != guestval) { - msrval = setguest ? guestval : hostval; - wrmsrl(MSR_IA32_SPEC_CTRL, msrval); - } - } - /* * If SSBD is not handled in MSR_SPEC_CTRL on AMD, update * MSR_AMD64_L2_CFG or MSR_VIRT_SPEC_CTRL if supported. diff --git a/arch/x86/kvm/kvm-asm-offsets.c b/arch/x86/kvm/kvm-asm-offsets.c index f83e88b85bf2..b2877c2c8df1 100644 --- a/arch/x86/kvm/kvm-asm-offsets.c +++ b/arch/x86/kvm/kvm-asm-offsets.c @@ -16,6 +16,7 @@ static void __used common(void) BLANK(); OFFSET(SVM_vcpu_arch_regs, vcpu_svm, vcpu.arch.regs); OFFSET(SVM_current_vmcb, vcpu_svm, current_vmcb); + OFFSET(SVM_spec_ctrl, vcpu_svm, spec_ctrl); OFFSET(SVM_vmcb01, vcpu_svm, vmcb01); OFFSET(KVM_VMCB_pa, kvm_vmcb_info, pa); } diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index e15f6ea9e5cc..512bc06a4ba1 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -730,6 +730,15 @@ static bool msr_write_intercepted(struct kvm_vcpu *vcpu, u32 msr) u32 offset; u32 *msrpm; + /* + * For non-nested case: + * If the L01 MSR bitmap does not intercept the MSR, then we need to + * save it. + * + * For nested case: + * If the L02 MSR bitmap does not intercept the MSR, then we need to + * save it. + */ msrpm = is_guest_mode(vcpu) ? to_svm(vcpu)->nested.msrpm: to_svm(vcpu)->msrpm; @@ -3911,18 +3920,19 @@ static fastpath_t svm_exit_handlers_fastpath(struct kvm_vcpu *vcpu) return EXIT_FASTPATH_NONE; } -static noinstr void svm_vcpu_enter_exit(struct kvm_vcpu *vcpu) +static noinstr void svm_vcpu_enter_exit(struct kvm_vcpu *vcpu, bool spec_ctrl_intercepted) { struct vcpu_svm *svm = to_svm(vcpu); guest_state_enter_irqoff(); if (sev_es_guest(vcpu->kvm)) { - __svm_sev_es_vcpu_run(svm); + __svm_sev_es_vcpu_run(svm, spec_ctrl_intercepted); } else { struct svm_cpu_data *sd = per_cpu(svm_data, vcpu->cpu); - __svm_vcpu_run(svm, __sme_page_pa(sd->save_area)); + __svm_vcpu_run(svm, __sme_page_pa(sd->save_area), + spec_ctrl_intercepted); } guest_state_exit_irqoff(); @@ -3931,6 +3941,7 @@ static noinstr void svm_vcpu_enter_exit(struct kvm_vcpu *vcpu) static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); + bool spec_ctrl_intercepted = msr_write_intercepted(vcpu, MSR_IA32_SPEC_CTRL); trace_kvm_entry(vcpu); @@ -3989,26 +4000,7 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu) if (!static_cpu_has(X86_FEATURE_V_SPEC_CTRL)) x86_spec_ctrl_set_guest(svm->spec_ctrl, svm->virt_spec_ctrl); - svm_vcpu_enter_exit(vcpu); - - /* - * We do not use IBRS in the kernel. If this vCPU has used the - * SPEC_CTRL MSR it may have left it on; save the value and - * turn it off. This is much more efficient than blindly adding - * it to the atomic save/restore list. Especially as the former - * (Saving guest MSRs on vmexit) doesn't even exist in KVM. - * - * For non-nested case: - * If the L01 MSR bitmap does not intercept the MSR, then we need to - * save it. - * - * For nested case: - * If the L02 MSR bitmap does not intercept the MSR, then we need to - * save it. - */ - if (!static_cpu_has(X86_FEATURE_V_SPEC_CTRL) && - unlikely(!msr_write_intercepted(vcpu, MSR_IA32_SPEC_CTRL))) - svm->spec_ctrl = native_read_msr(MSR_IA32_SPEC_CTRL); + svm_vcpu_enter_exit(vcpu, spec_ctrl_intercepted); if (!sev_es_guest(vcpu->kvm)) reload_tss(vcpu); diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index 932f26be5675..bf9ff39dc420 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -683,7 +683,7 @@ void sev_es_unmap_ghcb(struct vcpu_svm *svm); /* vmenter.S */ -void __svm_sev_es_vcpu_run(struct vcpu_svm *svm); -void __svm_vcpu_run(struct vcpu_svm *svm, unsigned long hsave_pa); +void __svm_sev_es_vcpu_run(struct vcpu_svm *svm, bool spec_ctrl_intercepted); +void __svm_vcpu_run(struct vcpu_svm *svm, unsigned long hsave_pa, bool spec_ctrl_intercepted); #endif diff --git a/arch/x86/kvm/svm/vmenter.S b/arch/x86/kvm/svm/vmenter.S index 0a4272faf80f..a02eef724379 100644 --- a/arch/x86/kvm/svm/vmenter.S +++ b/arch/x86/kvm/svm/vmenter.S @@ -32,10 +32,70 @@ .section .noinstr.text, "ax" +.macro RESTORE_GUEST_SPEC_CTRL + /* No need to do anything if SPEC_CTRL is unset or V_SPEC_CTRL is set */ + ALTERNATIVE_2 "", \ + "jmp 800f", X86_FEATURE_MSR_SPEC_CTRL, \ + "", X86_FEATURE_V_SPEC_CTRL +801: +.endm + +.macro RESTORE_HOST_SPEC_CTRL + /* No need to do anything if SPEC_CTRL is unset or V_SPEC_CTRL is set */ + ALTERNATIVE_2 "", \ + "jmp 900f", X86_FEATURE_MSR_SPEC_CTRL, \ + "", X86_FEATURE_V_SPEC_CTRL +901: +.endm + +.macro RESTORE_SPEC_CTRL_BODY +800: + /* + * SPEC_CTRL handling: if the guest's SPEC_CTRL value differs from the + * host's, write the MSR. This is kept out-of-line so that the common + * case does not have to jump. + * + * IMPORTANT: To avoid RSB underflow attacks and any other nastiness, + * there must not be any returns or indirect branches between this code + * and vmentry. + */ + movl SVM_spec_ctrl(%_ASM_DI), %eax + cmp PER_CPU_VAR(x86_spec_ctrl_current), %eax + je 801b + mov $MSR_IA32_SPEC_CTRL, %ecx + xor %edx, %edx + wrmsr + jmp 801b + +900: + /* Same for after vmexit. */ + mov $MSR_IA32_SPEC_CTRL, %ecx + + /* + * Load the value that the guest had written into MSR_IA32_SPEC_CTRL, + * if it was not intercepted during guest execution. + */ + cmpb $0, (%_ASM_SP) + jnz 998f + rdmsr + movl %eax, SVM_spec_ctrl(%_ASM_DI) +998: + + /* Now restore the host value of the MSR if different from the guest's. */ + movl PER_CPU_VAR(x86_spec_ctrl_current), %eax + cmp SVM_spec_ctrl(%_ASM_DI), %eax + je 901b + xor %edx, %edx + wrmsr + jmp 901b +.endm + + /** * __svm_vcpu_run - Run a vCPU via a transition to SVM guest mode * @svm: struct vcpu_svm * * @hsave_pa: unsigned long + * @spec_ctrl_intercepted: bool */ SYM_FUNC_START(__svm_vcpu_run) push %_ASM_BP @@ -50,7 +110,12 @@ SYM_FUNC_START(__svm_vcpu_run) #endif push %_ASM_BX - /* @hsave_pa is needed last after vmexit, save it first. */ + /* + * Both @spec_ctrl_intercepted and @hsave_pa are used only after vmexit. + * @spec_ctrl_intercepted is needed later and accessed directly from + * the stack in RESTORE_HOST_SPEC_CTRL, so save it first. + */ + push %_ASM_ARG3 push %_ASM_ARG2 /* Save @svm. */ @@ -61,6 +126,8 @@ SYM_FUNC_START(__svm_vcpu_run) mov %_ASM_ARG1, %_ASM_DI .endif + RESTORE_GUEST_SPEC_CTRL + /* * Use a single vmcb (vmcb01 because it's always valid) for * context switching guest state via VMLOAD/VMSAVE, that way @@ -138,6 +205,8 @@ SYM_FUNC_START(__svm_vcpu_run) FILL_RETURN_BUFFER %_ASM_AX, RSB_CLEAR_LOOPS, X86_FEATURE_RETPOLINE #endif + RESTORE_HOST_SPEC_CTRL + /* * Mitigate RETBleed for AMD/Hygon Zen uarch. RET should be * untrained as soon as we exit the VM and are back to the @@ -173,6 +242,9 @@ SYM_FUNC_START(__svm_vcpu_run) xor %r15d, %r15d #endif + /* "Pop" @spec_ctrl_intercepted. */ + pop %_ASM_BX + pop %_ASM_BX #ifdef CONFIG_X86_64 @@ -187,6 +259,8 @@ SYM_FUNC_START(__svm_vcpu_run) pop %_ASM_BP RET + RESTORE_SPEC_CTRL_BODY + 10: cmpb $0, kvm_rebooting jne 2b ud2 @@ -210,6 +284,7 @@ SYM_FUNC_END(__svm_vcpu_run) /** * __svm_sev_es_vcpu_run - Run a SEV-ES vCPU via a transition to SVM guest mode * @svm: struct vcpu_svm * + * @spec_ctrl_intercepted: bool */ SYM_FUNC_START(__svm_sev_es_vcpu_run) push %_ASM_BP @@ -224,8 +299,21 @@ SYM_FUNC_START(__svm_sev_es_vcpu_run) #endif push %_ASM_BX + /* Save @spec_ctrl_intercepted for RESTORE_HOST_SPEC_CTRL. */ + push %_ASM_ARG2 + + /* Save @svm. */ + push %_ASM_ARG1 + +.ifnc _ASM_ARG1, _ASM_DI + /* Move @svm to RDI for RESTORE_GUEST_SPEC_CTRL. */ + mov %_ASM_ARG1, %_ASM_DI +.endif + + RESTORE_GUEST_SPEC_CTRL + /* Get svm->current_vmcb->pa into RAX. */ - mov SVM_current_vmcb(%_ASM_ARG1), %_ASM_AX + mov SVM_current_vmcb(%_ASM_DI), %_ASM_AX mov KVM_VMCB_pa(%_ASM_AX), %_ASM_AX /* Enter guest mode */ @@ -235,11 +323,16 @@ SYM_FUNC_START(__svm_sev_es_vcpu_run) 2: cli + /* Pop @svm to RDI, guest registers have been saved already. */ + pop %_ASM_DI + #ifdef CONFIG_RETPOLINE /* IMPORTANT: Stuff the RSB immediately after VM-Exit, before RET! */ FILL_RETURN_BUFFER %_ASM_AX, RSB_CLEAR_LOOPS, X86_FEATURE_RETPOLINE #endif + RESTORE_HOST_SPEC_CTRL + /* * Mitigate RETBleed for AMD/Hygon Zen uarch. RET should be * untrained as soon as we exit the VM and are back to the @@ -249,6 +342,9 @@ SYM_FUNC_START(__svm_sev_es_vcpu_run) */ UNTRAIN_RET + /* "Pop" @spec_ctrl_intercepted. */ + pop %_ASM_BX + pop %_ASM_BX #ifdef CONFIG_X86_64 @@ -263,6 +359,8 @@ SYM_FUNC_START(__svm_sev_es_vcpu_run) pop %_ASM_BP RET + RESTORE_SPEC_CTRL_BODY + 3: cmpb $0, kvm_rebooting jne 2b ud2 -- 2.31.1

1 year, 11 months

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stable-rc/linux-5.10.y build: 185 builds: 3 failed, 182 passed, 4 errors, 14 warnings (v5.10.153-118-g69a0227f6bd6)

by kernelci.org bot

stable-rc/linux-5.10.y build: 185 builds: 3 failed, 182 passed, 4 errors, 14 warnings (v5.10.153-118-g69a0227f6bd6) Full Build Summary: https://kernelci.org/build/stable-rc/branch/linux-5.10.y/kernel/v5.10.153-1… Tree: stable-rc Branch: linux-5.10.y Git Describe: v5.10.153-118-g69a0227f6bd6 Git Commit: 69a0227f6bd671ba8efa071c58d9f127932e25f2 Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git Built: 7 unique architectures Build Failures Detected: arm: rpc_defconfig: (gcc-10) FAIL mips: ip27_defconfig: (gcc-10) FAIL ip28_defconfig: (gcc-10) FAIL Errors and Warnings Detected: arc: arm64: defconfig (gcc-10): 1 warning defconfig+arm64-chromebook (gcc-10): 1 warning arm: imx_v4_v5_defconfig (gcc-10): 1 warning imx_v6_v7_defconfig (gcc-10): 1 warning multi_v7_defconfig (gcc-10): 1 warning rpc_defconfig (gcc-10): 4 errors i386: mips: 32r2el_defconfig (gcc-10): 1 warning decstation_64_defconfig (gcc-10): 1 warning decstation_defconfig (gcc-10): 1 warning decstation_r4k_defconfig (gcc-10): 1 warning rm200_defconfig (gcc-10): 1 warning riscv: rv32_defconfig (gcc-10): 4 warnings x86_64: Errors summary: 2 arm-linux-gnueabihf-gcc: error: unrecognized -march target: armv3m 2 arm-linux-gnueabihf-gcc: error: missing argument to ‘-march=’ Warnings summary: 5 drivers/mmc/host/sdhci-esdhc-imx.c:1548:12: warning: ‘sdhci_esdhc_imx_probe_nondt’ defined but not used [-Wunused-function] 3 kernel/rcu/tasks.h:710:13: warning: ‘show_rcu_tasks_rude_gp_kthread’ defined but not used [-Wunused-function] 2 <stdin>:830:2: warning: #warning syscall fstat64 not implemented [-Wcpp] 2 <stdin>:1127:2: warning: #warning syscall fstatat64 not implemented [-Wcpp] 1 drivers/block/paride/bpck.c:32: warning: "PC" redefined 1 WARNING: modpost: Symbol info of vmlinux is missing. Unresolved symbol check will be entirely skipped. Section mismatches summary: 1 WARNING: modpost: vmlinux.o(___ksymtab_gpl+ixp4xx_irq_init+0x0): Section mismatch in reference from the variable __ksymtab_ixp4xx_irq_init to the function .init.text:ixp4xx_irq_init() 1 WARNING: modpost: vmlinux.o(___ksymtab+prom_init_numa_memory+0x0): Section mismatch in reference from the variable __ksymtab_prom_init_numa_memory to the function .init.text:prom_init_numa_memory() ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- 32r2el_defconfig (mips, gcc-10) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: WARNING: modpost: Symbol info of vmlinux is missing. Unresolved symbol check will be entirely skipped. -------------------------------------------------------------------------------- allnoconfig (i386, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- allnoconfig (arc, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- allnoconfig (x86_64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- am200epdkit_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- ar7_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- aspeed_g4_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- aspeed_g5_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- assabet_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- at91_dt_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- ath25_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- ath79_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- axm55xx_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- axs103_defconfig (arc, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- axs103_smp_defconfig (arc, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- badge4_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- bcm2835_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- bcm47xx_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- bcm63xx_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- bigsur_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- bmips_be_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- bmips_stb_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- capcella_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- cavium_octeon_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- cerfcube_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- ci20_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- cm_x300_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- cobalt_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- colibri_pxa270_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- colibri_pxa300_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- collie_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- corgi_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- cu1000-neo_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- cu1830-neo_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- davinci_all_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- db1xxx_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- decstation_64_defconfig (mips, gcc-10) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: kernel/rcu/tasks.h:710:13: warning: ‘show_rcu_tasks_rude_gp_kthread’ defined but not used [-Wunused-function] -------------------------------------------------------------------------------- decstation_defconfig (mips, gcc-10) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: kernel/rcu/tasks.h:710:13: warning: ‘show_rcu_tasks_rude_gp_kthread’ defined but not used [-Wunused-function] -------------------------------------------------------------------------------- decstation_r4k_defconfig (mips, gcc-10) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: kernel/rcu/tasks.h:710:13: warning: ‘show_rcu_tasks_rude_gp_kthread’ defined but not used [-Wunused-function] -------------------------------------------------------------------------------- defconfig (riscv, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig (arm64, gcc-10) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: drivers/mmc/host/sdhci-esdhc-imx.c:1548:12: warning: ‘sdhci_esdhc_imx_probe_nondt’ defined but not used [-Wunused-function] -------------------------------------------------------------------------------- defconfig+arm64-chromebook (arm64, gcc-10) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: drivers/mmc/host/sdhci-esdhc-imx.c:1548:12: warning: ‘sdhci_esdhc_imx_probe_nondt’ defined but not used [-Wunused-function] -------------------------------------------------------------------------------- dove_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- e55_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- ebsa110_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- efm32_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- ep93xx_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- eseries_pxa_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- exynos_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- ezx_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- footbridge_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- fuloong2e_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- gcw0_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- gemini_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- gpr_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- h3600_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- h5000_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- hackkit_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- haps_hs_defconfig (arc, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- haps_hs_smp_defconfig (arc, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- hisi_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- hsdk_defconfig (arc, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig (i386, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- imote2_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- imx_v4_v5_defconfig (arm, gcc-10) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: drivers/mmc/host/sdhci-esdhc-imx.c:1548:12: warning: ‘sdhci_esdhc_imx_probe_nondt’ defined but not used [-Wunused-function] -------------------------------------------------------------------------------- imx_v6_v7_defconfig (arm, gcc-10) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: drivers/mmc/host/sdhci-esdhc-imx.c:1548:12: warning: ‘sdhci_esdhc_imx_probe_nondt’ defined but not used [-Wunused-function] -------------------------------------------------------------------------------- integrator_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- iop32x_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- ip22_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- ip27_defconfig (mips, gcc-10) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- ip28_defconfig (mips, gcc-10) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- ip32_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- ixp4xx_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches Section mismatches: WARNING: modpost: vmlinux.o(___ksymtab_gpl+ixp4xx_irq_init+0x0): Section mismatch in reference from the variable __ksymtab_ixp4xx_irq_init to the function .init.text:ixp4xx_irq_init() -------------------------------------------------------------------------------- jazz_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- jmr3927_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- jornada720_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- keystone_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- lart_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- lemote2f_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- loongson1b_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- loongson1c_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- loongson3_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches Section mismatches: WARNING: modpost: vmlinux.o(___ksymtab+prom_init_numa_memory+0x0): Section mismatch in reference from the variable __ksymtab_prom_init_numa_memory to the function .init.text:prom_init_numa_memory() -------------------------------------------------------------------------------- lpc18xx_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- lpc32xx_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- lpd270_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- lubbock_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- magician_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- mainstone_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- malta_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- malta_kvm_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- malta_kvm_guest_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- malta_qemu_32r6_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- maltaaprp_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- maltasmvp_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- maltasmvp_eva_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- maltaup_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- maltaup_xpa_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- milbeaut_m10v_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- mini2440_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- mmp2_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- moxart_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- mpc30x_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- mps2_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- mtx1_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v4t_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v5_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig (arm, gcc-10) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: drivers/mmc/host/sdhci-esdhc-imx.c:1548:12: warning: ‘sdhci_esdhc_imx_probe_nondt’ defined but not used [-Wunused-function] -------------------------------------------------------------------------------- mvebu_v5_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- mvebu_v7_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- mxs_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- neponset_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- netwinder_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- nhk8815_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- nlm_xlp_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- nlm_xlr_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- nommu_k210_defconfig (riscv, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- nsimosci_hs_defconfig (arc, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- nsimosci_hs_smp_defconfig (arc, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- omap1_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- omap2plus_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- omega2p_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- orion5x_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- oxnas_v6_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- palmz72_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- pcm027_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- pic32mzda_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- pistachio_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- pleb_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- prima2_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- pxa168_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- pxa255-idp_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- pxa3xx_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- pxa910_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- pxa_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- qcom_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- qi_lb60_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- rb532_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- rbtx49xx_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- realview_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- rm200_defconfig (mips, gcc-10) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: drivers/block/paride/bpck.c:32: warning: "PC" redefined -------------------------------------------------------------------------------- rpc_defconfig (arm, gcc-10) — FAIL, 4 errors, 0 warnings, 0 section mismatches Errors: arm-linux-gnueabihf-gcc: error: unrecognized -march target: armv3m arm-linux-gnueabihf-gcc: error: unrecognized -march target: armv3m arm-linux-gnueabihf-gcc: error: missing argument to ‘-march=’ arm-linux-gnueabihf-gcc: error: missing argument to ‘-march=’ -------------------------------------------------------------------------------- rs90_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- rt305x_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- rv32_defconfig (riscv, gcc-10) — PASS, 0 errors, 4 warnings, 0 section mismatches Warnings: <stdin>:830:2: warning: #warning syscall fstat64 not implemented [-Wcpp] <stdin>:1127:2: warning: #warning syscall fstatat64 not implemented [-Wcpp] <stdin>:830:2: warning: #warning syscall fstat64 not implemented [-Wcpp] <stdin>:1127:2: warning: #warning syscall fstatat64 not implemented [-Wcpp] -------------------------------------------------------------------------------- s3c2410_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- s3c6400_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- s5pv210_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- sama5_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- sb1250_swarm_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- shannon_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- shmobile_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- simpad_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- socfpga_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- spear13xx_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- spear3xx_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- spear6xx_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- spitz_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- stm32_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- sunxi_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- tango4_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- tb0219_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- tb0226_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- tb0287_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- tct_hammer_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- tegra_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- tinyconfig (arc, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- tinyconfig (i386, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- tinyconfig (x86_64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- trizeps4_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- u300_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- u8500_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- vdk_hs38_defconfig (arc, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- vdk_hs38_smp_defconfig (arc, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- versatile_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- vexpress_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- vf610m4_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- viper_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- vocore2_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- vt8500_v6_v7_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- workpad_defconfig (mips, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig (x86_64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+x86-chromebook (x86_64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- xcep_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- zeus_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- zx_defconfig (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches --- For more info write to <info(a)kernelci.org>

1 year, 11 months

1
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[PATCH v2 4/8] KVM: SVM: retrieve VMCB from assembly

by Paolo Bonzini

This is needed in order to keep the number of arguments to 3 or less, after adding hsave_pa and spec_ctrl_intercepted. 32-bit builds only support passing three arguments in registers, fortunately all other data is reachable from the vcpu_svm struct. It is not strictly necessary for __svm_sev_es_vcpu_run, but staying consistent is a good idea since it makes __svm_sev_es_vcpu_run a stripped version of _svm_vcpu_run. No functional change intended. Cc: stable(a)vger.kernel.org Fixes: f14eec0a3203 ("KVM: SVM: move more vmentry code to assembly") Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> --- arch/x86/kvm/kvm-asm-offsets.c | 2 ++ arch/x86/kvm/svm/svm.c | 5 ++--- arch/x86/kvm/svm/svm.h | 4 ++-- arch/x86/kvm/svm/vmenter.S | 20 ++++++++++---------- 4 files changed, 16 insertions(+), 15 deletions(-) diff --git a/arch/x86/kvm/kvm-asm-offsets.c b/arch/x86/kvm/kvm-asm-offsets.c index 30db96852e2d..f1b694e431ae 100644 --- a/arch/x86/kvm/kvm-asm-offsets.c +++ b/arch/x86/kvm/kvm-asm-offsets.c @@ -15,6 +15,8 @@ static void __used common(void) if (IS_ENABLED(CONFIG_KVM_AMD)) { BLANK(); OFFSET(SVM_vcpu_arch_regs, vcpu_svm, vcpu.arch.regs); + OFFSET(SVM_current_vmcb, vcpu_svm, current_vmcb); + OFFSET(KVM_VMCB_pa, kvm_vmcb_info, pa); } if (IS_ENABLED(CONFIG_KVM_INTEL)) { diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index b412bc5773c5..0c86c435c51f 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -3914,12 +3914,11 @@ static fastpath_t svm_exit_handlers_fastpath(struct kvm_vcpu *vcpu) static noinstr void svm_vcpu_enter_exit(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); - unsigned long vmcb_pa = svm->current_vmcb->pa; guest_state_enter_irqoff(); if (sev_es_guest(vcpu->kvm)) { - __svm_sev_es_vcpu_run(vmcb_pa); + __svm_sev_es_vcpu_run(svm); } else { struct svm_cpu_data *sd = per_cpu(svm_data, vcpu->cpu); @@ -3930,7 +3929,7 @@ static noinstr void svm_vcpu_enter_exit(struct kvm_vcpu *vcpu) * vmcb02 when switching vmcbs for nested virtualization. */ vmload(svm->vmcb01.pa); - __svm_vcpu_run(vmcb_pa, svm); + __svm_vcpu_run(svm); vmsave(svm->vmcb01.pa); vmload(__sme_page_pa(sd->save_area)); diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index 447e25c9101a..7ff1879e73c5 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -683,7 +683,7 @@ void sev_es_unmap_ghcb(struct vcpu_svm *svm); /* vmenter.S */ -void __svm_sev_es_vcpu_run(unsigned long vmcb_pa); -void __svm_vcpu_run(unsigned long vmcb_pa, struct vcpu_svm *svm); +void __svm_sev_es_vcpu_run(struct vcpu_svm *svm); +void __svm_vcpu_run(struct vcpu_svm *svm); #endif diff --git a/arch/x86/kvm/svm/vmenter.S b/arch/x86/kvm/svm/vmenter.S index 531510ab6072..d07bac1952c5 100644 --- a/arch/x86/kvm/svm/vmenter.S +++ b/arch/x86/kvm/svm/vmenter.S @@ -32,7 +32,6 @@ /** * __svm_vcpu_run - Run a vCPU via a transition to SVM guest mode - * @vmcb_pa: unsigned long * @svm: struct vcpu_svm * */ SYM_FUNC_START(__svm_vcpu_run) @@ -49,16 +48,16 @@ SYM_FUNC_START(__svm_vcpu_run) push %_ASM_BX /* Save @svm. */ - push %_ASM_ARG2 - - /* Save @vmcb. */ push %_ASM_ARG1 +.ifnc _ASM_ARG1, _ASM_DI /* Move @svm to RDI. */ - mov %_ASM_ARG2, %_ASM_DI + mov %_ASM_ARG1, %_ASM_DI +.endif - /* "POP" @vmcb to RAX. */ - pop %_ASM_AX + /* Get svm->current_vmcb->pa into RAX. */ + mov SVM_current_vmcb(%_ASM_DI), %_ASM_AX + mov KVM_VMCB_pa(%_ASM_AX), %_ASM_AX /* Load guest registers. */ mov VCPU_RCX(%_ASM_DI), %_ASM_CX @@ -170,7 +169,7 @@ SYM_FUNC_END(__svm_vcpu_run) /** * __svm_sev_es_vcpu_run - Run a SEV-ES vCPU via a transition to SVM guest mode - * @vmcb_pa: unsigned long + * @svm: struct vcpu_svm * */ SYM_FUNC_START(__svm_sev_es_vcpu_run) push %_ASM_BP @@ -185,8 +184,9 @@ SYM_FUNC_START(__svm_sev_es_vcpu_run) #endif push %_ASM_BX - /* Move @vmcb to RAX. */ - mov %_ASM_ARG1, %_ASM_AX + /* Get svm->current_vmcb->pa into RAX. */ + mov SVM_current_vmcb(%_ASM_ARG1), %_ASM_AX + mov KVM_VMCB_pa(%_ASM_AX), %_ASM_AX /* Enter guest mode */ sti -- 2.31.1

1 year, 11 months

2
2
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Servicio de la flota

by Antonio Valverde

Buenos días: Le escribo para hablarle sobre una de las mejores herramientas GPS en el mercado. La herramienta, que me gustaría presentarle brevemente, dispone de muchas funciones útiles para su trabajo, que optimizan los procesos de transporte y le ayudan a realizar tareas de campo de manera más eficiente. ¿Quiere conocer los detalles? Atentamente, Antonio Valverde

1 year, 11 months

1
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[PATCH 03/29] drm/amd/display: Fix invalid DPIA AUX reply causing system hang

by Tom Chung

From: Stylon Wang <stylon.wang(a)amd.com> [Why] Some DPIA AUX replies have incorrect data length from original request. This could lead to overwriting of destination buffer if reply length is larger, which could cause invalid access to stack since many destination buffers are declared as local variables. [How] Check for invalid length from DPIA AUX replies and trigger a retry if reply length is not the same as original request. A DRM_WARN() dmesg log is also produced. Reviewed-by: Roman Li <Roman.Li(a)amd.com> Acked-by: Tom Chung <chiahsuan.chung(a)amd.com> Signed-off-by: Stylon Wang <stylon.wang(a)amd.com> Cc: stable(a)vger.kernel.org #6.0.x --- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 20 +++++++++++++++++++ .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 6 ------ 2 files changed, 20 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 4d90c5415d5c..e15913285250 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -144,6 +144,14 @@ MODULE_FIRMWARE(FIRMWARE_NAVI12_DMCU); /* Number of bytes in PSP footer for firmware. */ #define PSP_FOOTER_BYTES 0x100 +/* + * DMUB Async to Sync Mechanism Status + */ +#define DMUB_ASYNC_TO_SYNC_ACCESS_FAIL 1 +#define DMUB_ASYNC_TO_SYNC_ACCESS_TIMEOUT 2 +#define DMUB_ASYNC_TO_SYNC_ACCESS_SUCCESS 3 +#define DMUB_ASYNC_TO_SYNC_ACCESS_INVALID 4 + /** * DOC: overview * @@ -10215,6 +10223,8 @@ static int amdgpu_dm_set_dmub_async_sync_status(bool is_cmd_aux, *operation_result = AUX_RET_ERROR_TIMEOUT; } else if (status_type == DMUB_ASYNC_TO_SYNC_ACCESS_FAIL) { *operation_result = AUX_RET_ERROR_ENGINE_ACQUIRE; + } else if (status_type == DMUB_ASYNC_TO_SYNC_ACCESS_INVALID) { + *operation_result = AUX_RET_ERROR_INVALID_REPLY; } else { *operation_result = AUX_RET_ERROR_UNKNOWN; } @@ -10262,6 +10272,16 @@ int amdgpu_dm_process_dmub_aux_transfer_sync(bool is_cmd_aux, struct dc_context payload->reply[0] = adev->dm.dmub_notify->aux_reply.command; if (!payload->write && adev->dm.dmub_notify->aux_reply.length && payload->reply[0] == AUX_TRANSACTION_REPLY_AUX_ACK) { + + if (payload->length != adev->dm.dmub_notify->aux_reply.length) { + DRM_WARN("invalid read from DPIA AUX %x(%d) got length %d!\n", + payload->address, payload->length, + adev->dm.dmub_notify->aux_reply.length); + return amdgpu_dm_set_dmub_async_sync_status(is_cmd_aux, ctx, + DMUB_ASYNC_TO_SYNC_ACCESS_INVALID, + (uint32_t *)operation_result); + } + memcpy(payload->data, adev->dm.dmub_notify->aux_reply.data, adev->dm.dmub_notify->aux_reply.length); } diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h index b618b2586e7b..83436ef3b26b 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h @@ -50,12 +50,6 @@ #define AMDGPU_DMUB_NOTIFICATION_MAX 5 -/* - * DMUB Async to Sync Mechanism Status - */ -#define DMUB_ASYNC_TO_SYNC_ACCESS_FAIL 1 -#define DMUB_ASYNC_TO_SYNC_ACCESS_TIMEOUT 2 -#define DMUB_ASYNC_TO_SYNC_ACCESS_SUCCESS 3 /* #include "include/amdgpu_dal_power_if.h" #include "amdgpu_dm_irq.h" -- 2.25.1

1 year, 11 months

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[PATCH 01/29] drm/amd/display: Fix access timeout to DPIA AUX at boot time

by Tom Chung

From: Stylon Wang <stylon.wang(a)amd.com> [Why] Since introduction of patch "Query DPIA HPD status.", link detection at boot could be accessing DPIA AUX, which will not succeed until DMUB outbox messaging is enabled and results in below dmesg logs: [ 160.840227] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout! [How] Enable DMUB outbox messaging before link detection at boot time. Reviewed-by: Wayne Lin <Wayne.Lin(a)amd.com> Acked-by: Tom Chung <chiahsuan.chung(a)amd.com> Signed-off-by: Stylon Wang <stylon.wang(a)amd.com> Cc: stable(a)vger.kernel.org #6.0.x --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 66eb16fbe09f..4d90c5415d5c 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1633,12 +1633,6 @@ static int amdgpu_dm_init(struct amdgpu_device *adev) } } - if (amdgpu_dm_initialize_drm_device(adev)) { - DRM_ERROR( - "amdgpu: failed to initialize sw for display support.\n"); - goto error; - } - /* Enable outbox notification only after IRQ handlers are registered and DMUB is alive. * It is expected that DMUB will resend any pending notifications at this point, for * example HPD from DPIA. @@ -1646,6 +1640,12 @@ static int amdgpu_dm_init(struct amdgpu_device *adev) if (dc_is_dmub_outbox_supported(adev->dm.dc)) dc_enable_dmub_outbox(adev->dm.dc); + if (amdgpu_dm_initialize_drm_device(adev)) { + DRM_ERROR( + "amdgpu: failed to initialize sw for display support.\n"); + goto error; + } + /* create fake encoders for MST */ dm_dp_create_fake_mst_encoders(adev); -- 2.25.1

1 year, 11 months

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stable-rc/queue/4.9 baseline: 63 runs, 8 regressions (v4.9.332-30-gc3e74d8f4c83)

by kernelci.org bot

stable-rc/queue/4.9 baseline: 63 runs, 8 regressions (v4.9.332-30-gc3e74d8f4c83) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ---------------------------+-------+--------------+----------+----------------------------+------------ qemu_arm64-virt-gicv2 | arm64 | lab-baylibre | gcc-10 | defconfig+arm64-chromebook | 1 qemu_arm64-virt-gicv2 | arm64 | lab-baylibre | gcc-10 | defconfig | 1 qemu_arm64-virt-gicv2-uefi | arm64 | lab-baylibre | gcc-10 | defconfig+arm64-chromebook | 1 qemu_arm64-virt-gicv2-uefi | arm64 | lab-baylibre | gcc-10 | defconfig | 1 qemu_arm64-virt-gicv3 | arm64 | lab-baylibre | gcc-10 | defconfig+arm64-chromebook | 1 qemu_arm64-virt-gicv3 | arm64 | lab-baylibre | gcc-10 | defconfig | 1 qemu_arm64-virt-gicv3-uefi | arm64 | lab-baylibre | gcc-10 | defconfig+arm64-chromebook | 1 qemu_arm64-virt-gicv3-uefi | arm64 | lab-baylibre | gcc-10 | defconfig | 1 Details: https://kernelci.org/test/job/stable-rc/branch/queue%2F4.9/kernel/v4.9.332-… Test: baseline Tree: stable-rc Branch: queue/4.9 Describe: v4.9.332-30-gc3e74d8f4c83 URL: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git SHA: c3e74d8f4c8372398b5b85f064bb9d9e490b8ea8 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ---------------------------+-------+--------------+----------+----------------------------+------------ qemu_arm64-virt-gicv2 | arm64 | lab-baylibre | gcc-10 | defconfig+arm64-chromebook | 1 Details: https://kernelci.org/test/plan/id/636ac228d1649949dfe7db76 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… HTML log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2022… * baseline.login: https://kernelci.org/test/case/id/636ac228d1649949dfe7db77 failing since 182 days (last pass: v4.9.312-43-g8ccd2ae24f47, first fail: v4.9.312-64-g69b9f3e8fce2) platform | arch | lab | compiler | defconfig | regressions ---------------------------+-------+--------------+----------+----------------------------+------------ qemu_arm64-virt-gicv2 | arm64 | lab-baylibre | gcc-10 | defconfig | 1 Details: https://kernelci.org/test/plan/id/636ac47d4b5cc03da0e7db55 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… HTML log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2022… * baseline.login: https://kernelci.org/test/case/id/636ac47d4b5cc03da0e7db56 failing since 182 days (last pass: v4.9.312-43-g5b8113699dd5, first fail: v4.9.312-64-g69b9f3e8fce2) platform | arch | lab | compiler | defconfig | regressions ---------------------------+-------+--------------+----------+----------------------------+------------ qemu_arm64-virt-gicv2-uefi | arm64 | lab-baylibre | gcc-10 | defconfig+arm64-chromebook | 1 Details: https://kernelci.org/test/plan/id/636ac22bd1649949dfe7db7c Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… HTML log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2022… * baseline.login: https://kernelci.org/test/case/id/636ac22bd1649949dfe7db7d failing since 182 days (last pass: v4.9.312-43-g8ccd2ae24f47, first fail: v4.9.312-64-g69b9f3e8fce2) platform | arch | lab | compiler | defconfig | regressions ---------------------------+-------+--------------+----------+----------------------------+------------ qemu_arm64-virt-gicv2-uefi | arm64 | lab-baylibre | gcc-10 | defconfig | 1 Details: https://kernelci.org/test/plan/id/636ac47e25120aa350e7db50 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… HTML log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2022… * baseline.login: https://kernelci.org/test/case/id/636ac47e25120aa350e7db51 failing since 182 days (last pass: v4.9.312-43-g5b8113699dd5, first fail: v4.9.312-64-g69b9f3e8fce2) platform | arch | lab | compiler | defconfig | regressions ---------------------------+-------+--------------+----------+----------------------------+------------ qemu_arm64-virt-gicv3 | arm64 | lab-baylibre | gcc-10 | defconfig+arm64-chromebook | 1 Details: https://kernelci.org/test/plan/id/636ac22d6fd4704aaae7db78 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… HTML log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2022… * baseline.login: https://kernelci.org/test/case/id/636ac22d6fd4704aaae7db79 failing since 182 days (last pass: v4.9.312-43-g8ccd2ae24f47, first fail: v4.9.312-64-g69b9f3e8fce2) platform | arch | lab | compiler | defconfig | regressions ---------------------------+-------+--------------+----------+----------------------------+------------ qemu_arm64-virt-gicv3 | arm64 | lab-baylibre | gcc-10 | defconfig | 1 Details: https://kernelci.org/test/plan/id/636ac47f8eafac9599e7db54 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… HTML log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2022… * baseline.login: https://kernelci.org/test/case/id/636ac47f8eafac9599e7db55 failing since 182 days (last pass: v4.9.312-43-g5b8113699dd5, first fail: v4.9.312-64-g69b9f3e8fce2) platform | arch | lab | compiler | defconfig | regressions ---------------------------+-------+--------------+----------+----------------------------+------------ qemu_arm64-virt-gicv3-uefi | arm64 | lab-baylibre | gcc-10 | defconfig+arm64-chromebook | 1 Details: https://kernelci.org/test/plan/id/636ac22a6fd4704aaae7db72 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… HTML log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2022… * baseline.login: https://kernelci.org/test/case/id/636ac22a6fd4704aaae7db73 failing since 182 days (last pass: v4.9.312-43-g8ccd2ae24f47, first fail: v4.9.312-64-g69b9f3e8fce2) platform | arch | lab | compiler | defconfig | regressions ---------------------------+-------+--------------+----------+----------------------------+------------ qemu_arm64-virt-gicv3-uefi | arm64 | lab-baylibre | gcc-10 | defconfig | 1 Details: https://kernelci.org/test/plan/id/636ac47c761278cf09e7db51 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… HTML log: https://storage.kernelci.org//stable-rc/queue-4.9/v4.9.332-30-gc3e74d8f4c83… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/buildroot-baseline/2022… * baseline.login: https://kernelci.org/test/case/id/636ac47c761278cf09e7db52 failing since 182 days (last pass: v4.9.312-43-g5b8113699dd5, first fail: v4.9.312-64-g69b9f3e8fce2)

1 year, 11 months

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[PATCH v3] ceph: avoid putting the realm twice when decoding snaps fails

by xiubli＠redhat.com

From: Xiubo Li <xiubli(a)redhat.com> When decoding the snaps fails it maybe leaving the 'first_realm' and 'realm' pointing to the same snaprealm memory. And then it'll put it twice and could cause random use-after-free, BUG_ON, etc issues. Cc: stable(a)vger.kernel.org URL: https://tracker.ceph.com/issues/57686 Signed-off-by: Xiubo Li <xiubli(a)redhat.com> --- fs/ceph/snap.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c index 9bceed2ebda3..f5b0fa1ff705 100644 --- a/fs/ceph/snap.c +++ b/fs/ceph/snap.c @@ -775,6 +775,7 @@ int ceph_update_snap_trace(struct ceph_mds_client *mdsc, dout("%s deletion=%d\n", __func__, deletion); more: + realm = NULL; rebuild_snapcs = 0; ceph_decode_need(&p, e, sizeof(*ri), bad); ri = p; -- 2.31.1

1 year, 11 months

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significant drop fio IOPS performance on v5.10

by Lu, Davina

Hello, I was profiling the 5.10 kernel and comparing it to 4.14. On a system with 64 virtual CPUs and 256 GiB of RAM, I am observing a significant drop in IO performance. Using the following FIO with the script "sudo ftest_write.sh <dev_name>" in attachment, I saw FIO iops result drop from 22K to less than 1K. The script simply does: mount a the EXT4 16GiB volume with max IOPS 64000K, mounting option is " -o noatime,nodiratime,data=ordered", then run fio with 2048 fio wring thread with 28800000 file size with { --name=16kb_rand_write_only_2048_jobs --directory=/rdsdbdata1 --rw=randwrite --ioengine=sync --buffered=1 --bs=16k --max-jobs=2048 --numjobs=2048 --runtime=60 --time_based --thread --filesize=28800000 --fsync=1 --group_reporting }. My analyzing is that the degradation is introduce by commit {244adf6426ee31a83f397b700d964cff12a247d3} and the issue is the contention on rsv_conversion_wq. The simplest option is to increase the journal size, but that introduces more operational complexity. Another option is to add the following change in attachment "allow more ext4-rsv-conversion workqueue.patch" From 27e1b0e14275a281b3529f6a60c7b23a81356751 Mon Sep 17 00:00:00 2001 From: davinalu <davinalu(a)amazon.com> Date: Fri, 23 Sep 2022 00:43:53 +0000 Subject: [PATCH] allow more ext4-rsv-conversion workqueue to speedup fio writing --- fs/ext4/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index a0af833f7da7..6b34298cdc3b 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -4963,7 +4963,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) * concurrency isn't really necessary. Limit it to 1. */ EXT4_SB(sb)->rsv_conversion_wq = - alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); + alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | + WQ_UNBOUND | __WQ_ORDERED, 0); if (!EXT4_SB(sb)->rsv_conversion_wq) { printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); ret = -ENOMEM; My thought is: If the max_active is 1, it means the "__WQ_ORDERED" combined with WQ_UNBOUND setting, based on alloc_workqueue(). So I added it . I am not sure should we need "__WQ_ORDERED" or not? without "__WQ_ORDERED" it looks also work at my testbed, but I added since not much fio TP difference on my testbed result with/out "__WQ_ORDERED". From My understanding and observation: with dioread_unlock and delay_alloc both enabled, the bio_endio() and ext4_writepages() will trigger this work queue to ext4_do_flush_completed_IO(). Looks like the work queue is an one-by-one updating: at EXT4 extend.c io_end->list_vec list only have one io_end_vec each time. So if the BIO has high performance, and we have only one thread to do EXT4 flush will be an bottleneck here. The "ext4-rsv-conversion" this workqueue is mainly for update the EXT4_IO_END_UNWRITTEN extend block(only exist on dioread_unlock and delay_alloc options are set) and extend status if I understand correctly here. Am I correct? This works on my test system and passes xfstests, but will this cause any corruption on ext4 extends blocks updates, not even sure about the journal transaction updates either? Can you tell me what I will break if this change is made? Thanks Davina

1 year, 11 months

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Linux-stable-mirror November 2022