From: Dave Hansen <dave.hansen@intel.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
luto@kernel.org, peterz@infradead.org
Cc: sathyanarayanan.kuppuswamy@linux.intel.com, aarcange@redhat.com,
ak@linux.intel.com, dan.j.williams@intel.com, david@redhat.com,
hpa@zytor.com, jgross@suse.com, jmattson@google.com,
joro@8bytes.org, jpoimboe@redhat.com, knsathya@kernel.org,
pbonzini@redhat.com, sdeep@vmware.com, seanjc@google.com,
tony.luck@intel.com, vkuznets@redhat.com, wanpengli@tencent.com,
thomas.lendacky@amd.com, brijesh.singh@amd.com, x86@kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCHv4 15/30] x86/boot: Allow to hook up alternative port I/O helpers
Date: Thu, 24 Feb 2022 14:14:02 -0800 [thread overview]
Message-ID: <5b82c83c-e3bc-9f5d-b164-8553d1894d64@intel.com> (raw)
In-Reply-To: <20220224155630.52734-16-kirill.shutemov@linux.intel.com>
On 2/24/22 07:56, Kirill A. Shutemov wrote:
> Port I/O instructions trigger #VE in the TDX environment. In response to
> the exception, kernel emulates these instructions using hypercalls.
>
> But during early boot, on the decompression stage, it is cumbersome to
> deal with #VE. It is cleaner to go to hypercalls directly, bypassing #VE
> handling.
>
> Add a way to hook up alternative port I/O helpers in the boot stub.
I'd add one more sentence to that:
... with a new pio_ops structure. For now, set the ops structure to
just call the normal I/O operation functions.
But, either way:
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
next prev parent reply other threads:[~2022-02-24 22:14 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-24 15:56 [PATCHv4 00/30] TDX Guest: TDX core support Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 01/30] x86/mm: Fix warning on build with X86_MEM_ENCRYPT=y Kirill A. Shutemov
2022-02-24 16:06 ` Dave Hansen
2022-02-27 22:01 ` Josh Poimboeuf
2022-02-28 16:20 ` Kirill A. Shutemov
2022-02-28 16:40 ` Josh Poimboeuf
2022-02-28 16:51 ` Dave Hansen
2022-02-28 17:11 ` Josh Poimboeuf
2022-03-01 8:48 ` Borislav Petkov
2022-02-24 15:56 ` [PATCHv4 02/30] x86/tdx: Detect running as a TDX guest in early boot Kirill A. Shutemov
2022-02-24 16:16 ` Dave Hansen
2022-02-24 15:56 ` [PATCHv4 03/30] x86/tdx: Provide common base for SEAMCALL and TDCALL C wrappers Kirill A. Shutemov
2022-02-24 16:35 ` Dave Hansen
2022-02-24 23:10 ` Kirill A. Shutemov
2022-02-25 0:41 ` Dave Hansen
2022-02-25 10:39 ` Kai Huang
2022-02-25 15:46 ` Kirill A. Shutemov
2022-02-25 16:12 ` Dave Hansen
2022-02-24 15:56 ` [PATCHv4 04/30] x86/tdx: Add __tdx_module_call() and __tdx_hypercall() helper functions Kirill A. Shutemov
2022-02-24 17:01 ` Dave Hansen
2022-02-24 23:29 ` Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 05/30] x86/tdx: Extend the confidential computing API to support TDX guests Kirill A. Shutemov
2022-02-24 17:54 ` Dave Hansen
2022-02-24 23:54 ` Kirill A. Shutemov
2022-02-25 0:51 ` Dave Hansen
2022-02-24 15:56 ` [PATCHv4 06/30] x86/tdx: Exclude shared bit from __PHYSICAL_MASK Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 07/30] x86/traps: Add #VE support for TDX guest Kirill A. Shutemov
2022-02-24 18:36 ` Dave Hansen
2022-02-25 19:30 ` Kirill A. Shutemov
2022-02-25 19:46 ` Dave Hansen
2022-02-24 15:56 ` [PATCHv4 08/30] x86/tdx: Add HLT support for TDX guests Kirill A. Shutemov
2022-02-24 18:42 ` Dave Hansen
2022-02-24 15:56 ` [PATCHv4 09/30] x86/tdx: Add MSR " Kirill A. Shutemov
2022-02-24 18:52 ` Dave Hansen
2022-02-24 19:04 ` Sean Christopherson
2022-02-24 19:36 ` Dave Hansen
2022-02-26 21:35 ` Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 10/30] x86/tdx: Handle CPUID via #VE Kirill A. Shutemov
2022-02-24 19:04 ` Dave Hansen
2022-02-27 1:07 ` Kirill A. Shutemov
2022-02-28 16:41 ` Dave Hansen
2022-02-28 22:53 ` Kirill A. Shutemov
2022-02-28 23:05 ` Dave Hansen
2022-02-28 23:31 ` Kirill A. Shutemov
2022-02-28 23:37 ` Dave Hansen
2022-02-24 15:56 ` [PATCHv4 11/30] x86/tdx: Handle in-kernel MMIO Kirill A. Shutemov
2022-02-24 20:11 ` Dave Hansen
2022-02-25 2:23 ` David Laight
2022-02-25 3:10 ` David Laight
2022-03-02 13:42 ` Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 12/30] x86/tdx: Detect TDX at early kernel decompression time Kirill A. Shutemov
2022-02-24 20:44 ` Dave Hansen
2022-02-24 15:56 ` [PATCHv4 13/30] x86: Adjust types used in port I/O helpers Kirill A. Shutemov
2022-02-24 21:24 ` Dave Hansen
2022-02-24 15:56 ` [PATCHv4 14/30] x86: Consolidate " Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 15/30] x86/boot: Allow to hook up alternative " Kirill A. Shutemov
2022-02-24 22:14 ` Dave Hansen [this message]
2022-02-27 22:02 ` Josh Poimboeuf
2022-02-28 16:33 ` Kirill A. Shutemov
2022-02-28 16:44 ` Josh Poimboeuf
2022-02-24 15:56 ` [PATCHv4 16/30] x86/boot/compressed: Support TDX guest port I/O at decompression time Kirill A. Shutemov
2022-02-24 22:22 ` Dave Hansen
2022-02-24 15:56 ` [PATCHv4 17/30] x86/tdx: Add port I/O emulation Kirill A. Shutemov
2022-02-24 22:43 ` Dave Hansen
2022-02-25 3:59 ` Dave Hansen
2022-02-28 1:16 ` Kirill A. Shutemov
2022-02-28 4:32 ` Dave Hansen
2022-02-24 15:56 ` [PATCHv4 18/30] x86/tdx: Handle early boot port I/O Kirill A. Shutemov
2022-02-24 22:58 ` Dave Hansen
2022-02-24 15:56 ` [PATCHv4 19/30] x86/tdx: Wire up KVM hypercalls Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 20/30] x86/boot: Add a trampoline for booting APs via firmware handoff Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 21/30] x86/acpi, x86/boot: Add multiprocessor wake-up support Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 22/30] x86/boot: Set CR0.NE early and keep it set during the boot Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 23/30] x86/boot: Avoid #VE during boot for TDX platforms Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 24/30] x86/topology: Disable CPU online/offline control for TDX guests Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 25/30] x86/tdx: Make pages shared in ioremap() Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 26/30] x86/mm/cpa: Add support for TDX shared memory Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 27/30] x86/kvm: Use bounce buffers for TD guest Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 28/30] x86/tdx: ioapic: Add shared bit for IOAPIC base address Kirill A. Shutemov
2022-02-24 15:56 ` [PATCHv4 29/30] ACPICA: Avoid cache flush on TDX guest Kirill A. Shutemov
2022-02-27 22:05 ` Josh Poimboeuf
2022-02-28 1:34 ` Dan Williams
2022-02-28 16:37 ` Kirill A. Shutemov
2022-02-28 16:46 ` Dave Hansen
2022-02-28 17:02 ` Josh Poimboeuf
2022-02-24 15:56 ` [PATCHv4 30/30] Documentation/x86: Document TDX kernel architecture Kirill A. Shutemov
2022-02-25 17:42 ` Dave Hansen
2022-02-25 17:54 ` Dave Hansen
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