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From: "Huang, Kai" <kai.huang@intel.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>, <x86@kernel.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Adrian Hunter <adrian.hunter@intel.com>,
	"Kuppuswamy Sathyanarayanan"
	<sathyanarayanan.kuppuswamy@linux.intel.com>,
	"Elena Reshetova" <elena.reshetova@intel.com>,
	Jun Nakajima <jun.nakajima@intel.com>,
	Rick Edgecombe <rick.p.edgecombe@intel.com>,
	Tom Lendacky <thomas.lendacky@amd.com>,
	"Kalra, Ashish" <ashish.kalra@amd.com>,
	"Sean Christopherson" <seanjc@google.com>,
	Baoquan He <bhe@redhat.com>, <kexec@lists.infradead.org>,
	<linux-coco@lists.linux.dev>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCHv8 10/17] x86/tdx: Convert shared memory back to private on kexec
Date: Wed, 28 Feb 2024 12:30:42 +1300	[thread overview]
Message-ID: <13ff89af-cee5-4102-be23-1c8ebd51f86d@intel.com> (raw)
In-Reply-To: <20240227212452.3228893-11-kirill.shutemov@linux.intel.com>


>   
> +/* Stop new private<->shared conversions */
> +static void tdx_kexec_stop_conversion(bool crash)
> +{
> +	/*
> +	 * Crash kernel reaches here with interrupts disabled: can't wait for
> +	 * conversions to finish.
> +	 *
> +	 * If race happened, just report and proceed.
> +	 */
> +	bool wait_for_lock = !crash;
> +
> +	if (!stop_memory_enc_conversion(wait_for_lock))
> +		pr_warn("Failed to finish shared<->private conversions\n");

"Failed to finish" -> "Failed to stop"?  stop_memory_enc_conversion() 
doesn't actually finish any conversion.

Other than that:

Reviewed-by: Kai Huang <kai.huang@intel.com>


_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

WARNING: multiple messages have this Message-ID (diff)
From: "Huang, Kai" <kai.huang@intel.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>, <x86@kernel.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Adrian Hunter <adrian.hunter@intel.com>,
	"Kuppuswamy Sathyanarayanan"
	<sathyanarayanan.kuppuswamy@linux.intel.com>,
	"Elena Reshetova" <elena.reshetova@intel.com>,
	Jun Nakajima <jun.nakajima@intel.com>,
	Rick Edgecombe <rick.p.edgecombe@intel.com>,
	Tom Lendacky <thomas.lendacky@amd.com>,
	"Kalra, Ashish" <ashish.kalra@amd.com>,
	"Sean Christopherson" <seanjc@google.com>,
	Baoquan He <bhe@redhat.com>, <kexec@lists.infradead.org>,
	<linux-coco@lists.linux.dev>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCHv8 10/17] x86/tdx: Convert shared memory back to private on kexec
Date: Wed, 28 Feb 2024 12:30:42 +1300	[thread overview]
Message-ID: <13ff89af-cee5-4102-be23-1c8ebd51f86d@intel.com> (raw)
In-Reply-To: <20240227212452.3228893-11-kirill.shutemov@linux.intel.com>


>   
> +/* Stop new private<->shared conversions */
> +static void tdx_kexec_stop_conversion(bool crash)
> +{
> +	/*
> +	 * Crash kernel reaches here with interrupts disabled: can't wait for
> +	 * conversions to finish.
> +	 *
> +	 * If race happened, just report and proceed.
> +	 */
> +	bool wait_for_lock = !crash;
> +
> +	if (!stop_memory_enc_conversion(wait_for_lock))
> +		pr_warn("Failed to finish shared<->private conversions\n");

"Failed to finish" -> "Failed to stop"?  stop_memory_enc_conversion() 
doesn't actually finish any conversion.

Other than that:

Reviewed-by: Kai Huang <kai.huang@intel.com>


  reply	other threads:[~2024-02-27 23:31 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-27 21:24 [PATCHv8 00/17, CORRECTED] x86/tdx: Add kexec support Kirill A. Shutemov
2024-02-27 21:24 ` [PATCHv8 01/17] x86/acpi: Extract ACPI MADT wakeup code into a separate file Kirill A. Shutemov
2024-02-27 21:24 ` [PATCHv8 02/17] x86/apic: Mark acpi_mp_wake_* variables as __ro_after_init Kirill A. Shutemov
2024-02-27 21:24 ` [PATCHv8 03/17] cpu/hotplug: Add support for declaring CPU offlining not supported Kirill A. Shutemov
2024-02-27 21:24 ` [PATCHv8 04/17] cpu/hotplug, x86/acpi: Disable CPU offlining for ACPI MADT wakeup Kirill A. Shutemov
2024-02-27 21:24 ` [PATCHv8 05/17] x86/kexec: Keep CR4.MCE set during kexec for TDX guest Kirill A. Shutemov
2024-02-27 21:24 ` [PATCHv8 06/17] x86/mm: Make x86_platform.guest.enc_status_change_*() return errno Kirill A. Shutemov
2024-02-27 23:33   ` Huang, Kai
2024-02-27 23:33     ` Huang, Kai
2024-02-27 21:24 ` [PATCHv8 07/17] x86/mm: Return correct level from lookup_address() if pte is none Kirill A. Shutemov
2024-02-27 21:24 ` [PATCHv8 08/17] x86/tdx: Account shared memory Kirill A. Shutemov
2024-02-27 23:12   ` Huang, Kai
2024-02-27 23:12     ` Huang, Kai
2024-02-27 21:24 ` [PATCHv8 09/17] x86/mm: Adding callbacks to prepare encrypted memory for kexec Kirill A. Shutemov
2024-02-27 23:16   ` Huang, Kai
2024-02-27 23:16     ` Huang, Kai
2024-02-27 21:24 ` [PATCHv8 10/17] x86/tdx: Convert shared memory back to private on kexec Kirill A. Shutemov
2024-02-27 23:30   ` Huang, Kai [this message]
2024-02-27 23:30     ` Huang, Kai
2024-02-27 21:24 ` [PATCHv8 11/17] x86/mm: Make e820_end_ram_pfn() cover E820_TYPE_ACPI ranges Kirill A. Shutemov
2024-02-27 21:24 ` [PATCHv8 12/17] x86/acpi: Rename fields in acpi_madt_multiproc_wakeup structure Kirill A. Shutemov
2024-02-27 21:24 ` [PATCHv8 13/17] x86/acpi: Do not attempt to bring up secondary CPUs in kexec case Kirill A. Shutemov
2024-02-27 21:24 ` [PATCHv8 14/17] x86/smp: Add smp_ops.stop_this_cpu() callback Kirill A. Shutemov
2024-02-27 21:24 ` [PATCHv8 15/17] x86/mm: Introduce kernel_ident_mapping_free() Kirill A. Shutemov
2024-02-27 21:24 ` [PATCHv8 16/17] x86/acpi: Add support for CPU offlining for ACPI MADT wakeup method Kirill A. Shutemov
2024-02-27 21:24 ` [PATCHv8 17/17] ACPI: tables: Print MULTIPROC_WAKEUP when MADT is parsed Kirill A. Shutemov
2024-02-27 21:30   ` Kuppuswamy Sathyanarayanan
2024-02-27 21:30     ` Kuppuswamy Sathyanarayanan
2024-02-27 22:08   ` Huang, Kai
2024-02-27 22:08     ` Huang, Kai
2024-02-28 15:22     ` Kirill A. Shutemov
2024-02-28 15:22       ` Kirill A. Shutemov
2024-02-28 21:19       ` Huang, Kai
2024-02-28 21:19         ` Huang, Kai
2024-03-06 15:02 ` [PATCHv8 00/17, CORRECTED] x86/tdx: Add kexec support Kirill A. Shutemov
2024-03-06 15:02   ` Kirill A. Shutemov
2024-03-07  6:57   ` Tao Liu
2024-03-07  6:57     ` Tao Liu
2024-03-18  7:02 ` [PATCH v2 0/3] x86/snp: " Ashish Kalra
2024-03-18  7:02   ` Ashish Kalra
2024-03-18  7:02   ` [PATCH v2 1/3] efi/x86: skip efi_arch_mem_reserve() in case of kexec Ashish Kalra
2024-03-18  7:02     ` Ashish Kalra
2024-03-19  4:00     ` Dave Young
2024-03-19  4:00       ` Dave Young
2024-03-24 22:32       ` Kalra, Ashish
2024-03-24 22:32         ` Kalra, Ashish
2024-03-18  7:02   ` [PATCH v2 2/3] x86/mm: Do not zap page table entries mapping unaccepted memory table during kdump Ashish Kalra
2024-03-18  7:02     ` Ashish Kalra
2024-03-21 14:58     ` Kirill A. Shutemov
2024-03-21 14:58       ` Kirill A. Shutemov
2024-03-18  7:02   ` [PATCH v2 3/3] x86/snp: Convert shared memory back to private on kexec Ashish Kalra
2024-03-18  7:02     ` Ashish Kalra

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