From: Thomas Gleixner <tglx@linutronix.de>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
mingo@redhat.com, bp@alien8.de, dave.hansen@intel.com,
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,
x86@kernel.org, linux-kernel@vger.kernel.org,
Isaku Yamahata <isaku.yamahata@intel.com>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Subject: Re: [PATCHv2 26/29] x86/tdx: ioapic: Add shared bit for IOAPIC base address
Date: Wed, 02 Feb 2022 02:33:16 +0100 [thread overview]
Message-ID: <871r0mvyqr.ffs@tglx> (raw)
In-Reply-To: <20220124150215.36893-27-kirill.shutemov@linux.intel.com>
On Mon, Jan 24 2022 at 18:02, Kirill A. Shutemov wrote:
> From: Isaku Yamahata <isaku.yamahata@intel.com>
>
> The kernel interacts with each bare-metal IOAPIC with a special
> MMIO page. When running under KVM, the guest's IOAPICs are
> emulated by KVM.
>
> When running as a TDX guest, the guest needs to mark each IOAPIC
> mapping as "shared" with the host. This ensures that TDX private
> protections are not applied to the page, which allows the TDX host
> emulation to work.
>
> Earlier patches in this series modified ioremap() so that
The concept of earlier patches does not exist.
> ioremap()-created mappings such as virtio will be marked as
> shared. However, the IOAPIC code does not use ioremap() and instead
> uses the fixmap mechanism.
>
> Introduce a special fixmap helper just for the IOAPIC code. Ensure
> that it marks IOAPIC pages as "shared". This replaces
> set_fixmap_nocache() with __set_fixmap() since __set_fixmap()
> allows custom 'prot' values.
Why is this a TDX only issue and SEV does not suffer from that?
Thanks,
tglx
next prev parent reply other threads:[~2022-02-02 1:33 UTC|newest]
Thread overview: 154+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-24 15:01 [PATCHv2 00/29] TDX Guest: TDX core support Kirill A. Shutemov
2022-01-24 15:01 ` [PATCHv2 01/29] x86/tdx: Detect running as a TDX guest in early boot Kirill A. Shutemov
2022-02-01 19:29 ` Thomas Gleixner
2022-02-01 23:14 ` Kirill A. Shutemov
2022-02-03 0:32 ` Josh Poimboeuf
2022-02-03 14:09 ` Kirill A. Shutemov
2022-02-03 15:13 ` Dave Hansen
2022-01-24 15:01 ` [PATCHv2 02/29] x86/tdx: Extend the cc_platform_has() API to support TDX guests Kirill A. Shutemov
2022-02-01 19:31 ` Thomas Gleixner
2022-01-24 15:01 ` [PATCHv2 03/29] x86/tdx: Add __tdx_module_call() and __tdx_hypercall() helper functions Kirill A. Shutemov
2022-02-01 19:58 ` Thomas Gleixner
2022-02-02 2:55 ` Kirill A. Shutemov
2022-02-02 10:59 ` Kai Huang
2022-02-03 14:44 ` Kirill A. Shutemov
2022-02-03 23:47 ` Kai Huang
2022-02-04 3:43 ` Kirill A. Shutemov
2022-02-04 9:51 ` Kai Huang
2022-02-04 13:20 ` Kirill A. Shutemov
2022-02-04 10:12 ` Kai Huang
2022-02-04 13:18 ` Kirill A. Shutemov
2022-02-05 0:06 ` Kai Huang
2022-02-02 17:08 ` Thomas Gleixner
2022-01-24 15:01 ` [PATCHv2 04/29] x86/traps: Add #VE support for TDX guest Kirill A. Shutemov
2022-02-01 21:02 ` Thomas Gleixner
2022-02-01 21:26 ` Sean Christopherson
2022-02-12 1:42 ` Kirill A. Shutemov
2022-01-24 15:01 ` [PATCHv2 05/29] x86/tdx: Add HLT support for TDX guests Kirill A. Shutemov
2022-01-29 14:53 ` Borislav Petkov
2022-01-29 22:30 ` [PATCHv2.1 " Kirill A. Shutemov
2022-02-01 21:21 ` Thomas Gleixner
2022-02-02 12:48 ` Kirill A. Shutemov
2022-02-02 17:17 ` Thomas Gleixner
2022-02-04 16:55 ` Kirill A. Shutemov
2022-02-07 22:52 ` Sean Christopherson
2022-02-09 14:34 ` Kirill A. Shutemov
2022-02-09 18:05 ` Sean Christopherson
2022-02-09 22:23 ` Kirill A. Shutemov
2022-02-10 1:21 ` Sean Christopherson
2022-01-24 15:01 ` [PATCHv2 06/29] x86/tdx: Add MSR " Kirill A. Shutemov
2022-02-01 21:38 ` Thomas Gleixner
2022-02-02 13:06 ` Kirill A. Shutemov
2022-02-02 17:18 ` Thomas Gleixner
2022-01-24 15:01 ` [PATCHv2 07/29] x86/tdx: Handle CPUID via #VE Kirill A. Shutemov
2022-02-01 21:39 ` Thomas Gleixner
2022-01-24 15:01 ` [PATCHv2 08/29] x86/tdx: Handle in-kernel MMIO Kirill A. Shutemov
2022-01-24 19:30 ` Josh Poimboeuf
2022-01-24 22:08 ` Kirill A. Shutemov
2022-01-24 23:04 ` Josh Poimboeuf
2022-01-24 22:40 ` Dave Hansen
2022-01-24 23:04 ` [PATCHv2.1 " Kirill A. Shutemov
2022-02-01 16:14 ` Borislav Petkov
2022-02-01 22:30 ` [PATCHv2 " Thomas Gleixner
2022-01-24 15:01 ` [PATCHv2 09/29] x86/tdx: Detect TDX at early kernel decompression time Kirill A. Shutemov
2022-02-01 18:30 ` Borislav Petkov
2022-02-01 22:33 ` Thomas Gleixner
2022-01-24 15:01 ` [PATCHv2 10/29] x86: Consolidate port I/O helpers Kirill A. Shutemov
2022-02-01 22:36 ` Thomas Gleixner
2022-01-24 15:01 ` [PATCHv2 11/29] x86/boot: Allow to hook up alternative " Kirill A. Shutemov
2022-02-01 19:02 ` Borislav Petkov
2022-02-01 22:39 ` Thomas Gleixner
2022-02-01 22:53 ` Thomas Gleixner
2022-02-02 17:20 ` Kirill A. Shutemov
2022-02-02 19:05 ` Thomas Gleixner
2022-01-24 15:01 ` [PATCHv2 12/29] x86/boot/compressed: Support TDX guest port I/O at decompression time Kirill A. Shutemov
2022-02-01 22:55 ` Thomas Gleixner
2022-01-24 15:01 ` [PATCHv2 13/29] x86/tdx: Add port I/O emulation Kirill A. Shutemov
2022-02-01 23:01 ` Thomas Gleixner
2022-02-02 6:22 ` Borislav Petkov
2022-01-24 15:02 ` [PATCHv2 14/29] x86/tdx: Early boot handling of port I/O Kirill A. Shutemov
2022-02-01 23:02 ` Thomas Gleixner
2022-02-02 10:09 ` Borislav Petkov
2022-01-24 15:02 ` [PATCHv2 15/29] x86/tdx: Wire up KVM hypercalls Kirill A. Shutemov
2022-02-01 23:05 ` Thomas Gleixner
2022-01-24 15:02 ` [PATCHv2 16/29] x86/boot: Add a trampoline for booting APs via firmware handoff Kirill A. Shutemov
2022-02-01 23:06 ` Thomas Gleixner
2022-02-02 11:27 ` Borislav Petkov
2022-02-04 11:27 ` Kuppuswamy, Sathyanarayanan
2022-02-04 13:49 ` Borislav Petkov
2022-02-15 21:36 ` Kirill A. Shutemov
2022-02-16 10:07 ` Borislav Petkov
2022-02-16 14:10 ` Kirill A. Shutemov
2022-02-10 0:25 ` Kai Huang
2022-01-24 15:02 ` [PATCHv2 17/29] x86/acpi, x86/boot: Add multiprocessor wake-up support Kirill A. Shutemov
2022-02-01 23:27 ` Thomas Gleixner
2022-02-05 12:37 ` Kuppuswamy, Sathyanarayanan
2022-01-24 15:02 ` [PATCHv2 18/29] x86/boot: Avoid #VE during boot for TDX platforms Kirill A. Shutemov
2022-02-02 0:04 ` Thomas Gleixner
2022-02-11 16:13 ` Kirill A. Shutemov
2022-01-24 15:02 ` [PATCHv2 19/29] x86/topology: Disable CPU online/offline control for TDX guests Kirill A. Shutemov
2022-02-02 0:09 ` Thomas Gleixner
2022-02-02 0:11 ` Thomas Gleixner
2022-02-03 15:00 ` Borislav Petkov
2022-02-03 21:26 ` Thomas Gleixner
2022-01-24 15:02 ` [PATCHv2 20/29] x86/tdx: Get page shared bit info from the TDX module Kirill A. Shutemov
2022-02-02 0:14 ` Thomas Gleixner
2022-02-07 22:27 ` Sean Christopherson
2022-02-07 10:44 ` Borislav Petkov
2022-01-24 15:02 ` [PATCHv2 21/29] x86/tdx: Exclude shared bit from __PHYSICAL_MASK Kirill A. Shutemov
2022-02-02 0:18 ` Thomas Gleixner
2022-01-24 15:02 ` [PATCHv2 22/29] x86/tdx: Make pages shared in ioremap() Kirill A. Shutemov
2022-02-02 0:25 ` Thomas Gleixner
2022-02-02 19:27 ` Kirill A. Shutemov
2022-02-02 19:47 ` Thomas Gleixner
2022-02-07 16:27 ` Borislav Petkov
2022-02-07 16:57 ` Dave Hansen
2022-02-07 17:28 ` Borislav Petkov
2022-02-14 22:09 ` Kirill A. Shutemov
2022-02-15 10:50 ` Borislav Petkov
2022-02-15 14:49 ` Tom Lendacky
2022-02-15 15:41 ` Kirill A. Shutemov
2022-02-15 15:55 ` Tom Lendacky
2022-02-15 16:27 ` Kirill A. Shutemov
2022-02-15 16:34 ` Dave Hansen
2022-02-15 17:33 ` Kirill A. Shutemov
2022-02-16 9:58 ` Borislav Petkov
2022-02-16 15:37 ` Kirill A. Shutemov
2022-02-17 15:24 ` Borislav Petkov
2022-01-24 15:02 ` [PATCHv2 23/29] x86/tdx: Add helper to convert memory between shared and private Kirill A. Shutemov
2022-02-02 0:35 ` Thomas Gleixner
2022-02-08 12:12 ` Borislav Petkov
2022-02-09 23:21 ` Kirill A. Shutemov
2022-01-24 15:02 ` [PATCHv2 24/29] x86/mm/cpa: Add support for TDX shared memory Kirill A. Shutemov
2022-02-02 1:27 ` Thomas Gleixner
2022-01-24 15:02 ` [PATCHv2 25/29] x86/kvm: Use bounce buffers for TD guest Kirill A. Shutemov
2022-01-24 15:02 ` [PATCHv2 26/29] x86/tdx: ioapic: Add shared bit for IOAPIC base address Kirill A. Shutemov
2022-02-02 1:33 ` Thomas Gleixner [this message]
2022-02-04 22:09 ` Yamahata, Isaku
2022-02-04 22:31 ` Kirill A. Shutemov
2022-02-07 14:08 ` Tom Lendacky
2022-01-24 15:02 ` [PATCHv2 27/29] ACPICA: Avoid cache flush on TDX guest Kirill A. Shutemov
2022-01-24 15:02 ` [PATCHv2 28/29] x86/tdx: Warn about unexpected WBINVD Kirill A. Shutemov
2022-02-02 1:46 ` Thomas Gleixner
2022-02-04 21:35 ` Kirill A. Shutemov
2022-01-24 15:02 ` [PATCHv2 29/29] Documentation/x86: Document TDX kernel architecture Kirill A. Shutemov
2022-02-24 9:08 ` Xiaoyao Li
2022-02-09 10:56 ` [PATCHv2 00/29] TDX Guest: TDX core support Kai Huang
2022-02-09 11:08 ` Borislav Petkov
2022-02-09 11:30 ` Kai Huang
2022-02-09 11:40 ` Borislav Petkov
2022-02-09 11:48 ` Kai Huang
2022-02-09 11:56 ` Borislav Petkov
2022-02-09 11:58 ` Kai Huang
2022-02-09 16:50 ` Sean Christopherson
2022-02-09 19:11 ` Borislav Petkov
2022-02-09 20:07 ` Sean Christopherson
2022-02-09 20:36 ` Borislav Petkov
2022-02-10 0:05 ` Kai Huang
2022-02-16 16:08 ` Sean Christopherson
2022-02-16 15:48 ` Kirill A. Shutemov
2022-02-17 15:19 ` Borislav Petkov
2022-02-17 15:26 ` Kirill A. Shutemov
2022-02-17 15:34 ` Borislav Petkov
2022-02-17 15:29 ` Sean Christopherson
2022-02-17 15:31 ` Borislav Petkov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=871r0mvyqr.ffs@tglx \
--to=tglx@linutronix.de \
--cc=aarcange@redhat.com \
--cc=ak@linux.intel.com \
--cc=bp@alien8.de \
--cc=dan.j.williams@intel.com \
--cc=dave.hansen@intel.com \
--cc=david@redhat.com \
--cc=hpa@zytor.com \
--cc=isaku.yamahata@intel.com \
--cc=jgross@suse.com \
--cc=jmattson@google.com \
--cc=joro@8bytes.org \
--cc=jpoimboe@redhat.com \
--cc=kirill.shutemov@linux.intel.com \
--cc=knsathya@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@kernel.org \
--cc=mingo@redhat.com \
--cc=pbonzini@redhat.com \
--cc=peterz@infradead.org \
--cc=sathyanarayanan.kuppuswamy@linux.intel.com \
--cc=sdeep@vmware.com \
--cc=seanjc@google.com \
--cc=tony.luck@intel.com \
--cc=vkuznets@redhat.com \
--cc=wanpengli@tencent.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.