linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Andi Kleen <ak@linux.intel.com>
To: Christoph Hellwig <hch@infradead.org>,
	Kuppuswamy Sathyanarayanan 
	<sathyanarayanan.kuppuswamy@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Peter Zijlstra <peterz@infradead.org>,
	Andy Lutomirski <luto@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Richard Henderson <rth@twiddle.net>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	James E J Bottomley <James.Bottomley@hansenpartnership.com>,
	Helge Deller <deller@gmx.de>,
	"David S . Miller" <davem@davemloft.net>,
	Arnd Bergmann <arnd@arndb.de>, Jonathan Corbet <corbet@lwn.net>,
	"Michael S . Tsirkin" <mst@redhat.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	David Hildenbrand <david@redhat.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Peter H Anvin <hpa@zytor.com>,
	Dave Hansen <dave.hansen@intel.com>,
	Tony Luck <tony.luck@intel.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Kirill Shutemov <kirill.shutemov@linux.intel.com>,
	Sean Christopherson <seanjc@google.com>,
	Kuppuswamy Sathyanarayanan <knsathya@kernel.org>,
	x86@kernel.org, linux-kernel@vger.kernel.org,
	linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org,
	linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org,
	sparclinux@vger.kernel.org, linux-arch@vger.kernel.org,
	linux-doc@vger.kernel.org,
	virtualization@lists.linux-foundation.org
Subject: Re: [PATCH v5 12/16] PCI: Add pci_iomap_host_shared(), pci_iomap_host_shared_range()
Date: Mon, 11 Oct 2021 10:23:00 -0700	[thread overview]
Message-ID: <a070274e-6a3a-fb0a-68ff-d320d0729377@linux.intel.com> (raw)
In-Reply-To: <YWPunfa+WK86Cgnv@infradead.org>


On 10/11/2021 12:58 AM, Christoph Hellwig wrote:
> Just as last time:  This does not make any sense.  ioremap is shared
> by definition.

It's not necessarily shared with the host for confidential computing: 
for example BIOS mappings definitely should not be shared, but they're 
using ioremap today.

But if you have a better term please propose something. I tried to 
clarify it with "shared_host", but I don't know a better term.


-Andi



  reply	other threads:[~2021-10-11 17:23 UTC|newest]

Thread overview: 85+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-09  0:36 [PATCH v5 00/16] Add TDX Guest Support (shared-mm support) Kuppuswamy Sathyanarayanan
2021-10-09  0:36 ` [PATCH v5 01/16] x86/mm: Move force_dma_unencrypted() to common code Kuppuswamy Sathyanarayanan
2021-10-20 16:11   ` Tom Lendacky
2021-10-20 16:43     ` Sathyanarayanan Kuppuswamy
2021-10-09  0:36 ` [PATCH v5 02/16] x86/tdx: Get TD execution environment information via TDINFO Kuppuswamy Sathyanarayanan
2021-10-09  0:36 ` [PATCH v5 03/16] x86/tdx: Exclude Shared bit from physical_mask Kuppuswamy Sathyanarayanan
2021-11-05 22:11   ` Sean Christopherson
2021-11-08 14:45     ` Kirill A. Shutemov
2021-10-09  0:36 ` [PATCH v5 04/16] x86/tdx: Make pages shared in ioremap() Kuppuswamy Sathyanarayanan
2021-10-20 16:03   ` Tom Lendacky
2021-10-20 16:41     ` Sathyanarayanan Kuppuswamy
2021-10-09  0:37 ` [PATCH v5 05/16] x86/tdx: Add helper to do MapGPA hypercall Kuppuswamy Sathyanarayanan
2021-10-09  0:37 ` [PATCH v5 06/16] x86/tdx: Make DMA pages shared Kuppuswamy Sathyanarayanan
2021-10-20 16:33   ` Tom Lendacky
2021-10-20 16:45     ` Sathyanarayanan Kuppuswamy
2021-10-20 17:22       ` Tom Lendacky
2021-10-20 17:26         ` Sathyanarayanan Kuppuswamy
2021-10-09  0:37 ` [PATCH v5 07/16] x86/kvm: Use bounce buffers for TD guest Kuppuswamy Sathyanarayanan
2021-10-20 16:39   ` Tom Lendacky
2021-10-20 16:50     ` Sathyanarayanan Kuppuswamy
2021-10-20 17:26       ` Tom Lendacky
2021-10-09  0:37 ` [PATCH v5 08/16] x86/tdx: ioapic: Add shared bit for IOAPIC base address Kuppuswamy Sathyanarayanan
2021-10-09  0:37 ` [PATCH v5 09/16] x86/tdx: Enable shared memory confidential guest flags for TDX guest Kuppuswamy Sathyanarayanan
2021-10-09  0:37 ` [PATCH v5 10/16] PCI: Consolidate pci_iomap_range(), pci_iomap_wc_range() Kuppuswamy Sathyanarayanan
2021-10-09  0:37 ` [PATCH v5 11/16] asm/io.h: Add ioremap_host_shared fallback Kuppuswamy Sathyanarayanan
2021-10-09  0:37 ` [PATCH v5 12/16] PCI: Add pci_iomap_host_shared(), pci_iomap_host_shared_range() Kuppuswamy Sathyanarayanan
2021-10-09  9:53   ` Michael S. Tsirkin
2021-10-09 20:39     ` Dan Williams
2021-10-10 22:11       ` Andi Kleen
2021-10-12 17:42         ` Dan Williams
2021-10-12 18:35           ` Andi Kleen
2021-10-12 21:14             ` Dan Williams
2021-10-12 21:18               ` Michael S. Tsirkin
2021-10-12 21:24                 ` Andi Kleen
2021-10-12 21:28               ` Andi Kleen
2021-10-12 22:00                 ` Dan Williams
2021-10-18 12:13             ` Greg KH
2021-10-12 18:36         ` Reshetova, Elena
2021-10-12 18:38           ` Andi Kleen
2021-10-12 18:57             ` Reshetova, Elena
2021-10-12 19:13               ` Dan Williams
2021-10-12 19:49                 ` Andi Kleen
2021-10-12 21:11           ` Michael S. Tsirkin
2021-10-14  6:32             ` Reshetova, Elena
2021-10-14  6:57               ` Michael S. Tsirkin
2021-10-14  7:27                 ` Reshetova, Elena
2021-10-14  9:26                   ` Michael S. Tsirkin
2021-10-14 12:33                     ` Reshetova, Elena
2021-10-17 22:17                       ` Michael S. Tsirkin
2021-10-14 11:49                   ` Michael S. Tsirkin
2021-10-17 21:52               ` Thomas Gleixner
2021-10-18  7:03                 ` Reshetova, Elena
2021-10-18  0:55         ` Thomas Gleixner
2021-10-18  1:10           ` Thomas Gleixner
2021-10-18 12:08         ` Greg KH
2021-10-10 22:22     ` Andi Kleen
2021-10-11 11:59       ` Michael S. Tsirkin
2021-10-11 17:32         ` Andi Kleen
2021-10-11 18:22           ` Michael S. Tsirkin
2021-10-18 12:15         ` Greg KH
2021-10-18 13:17           ` Michael S. Tsirkin
2021-10-11  7:58   ` Christoph Hellwig
2021-10-11 17:23     ` Andi Kleen [this message]
2021-10-11 19:09       ` Michael S. Tsirkin
2021-10-12  5:31         ` Christoph Hellwig
2021-10-12 18:37           ` Andi Kleen
2021-10-09  0:37 ` [PATCH v5 13/16] PCI: Mark MSI data shared Kuppuswamy Sathyanarayanan
2021-10-09  0:37 ` [PATCH v5 14/16] virtio: Use shared mappings for virtio PCI devices Kuppuswamy Sathyanarayanan
2021-10-09  0:37 ` [PATCH v5 15/16] x86/tdx: Implement ioremap_host_shared for x86 Kuppuswamy Sathyanarayanan
2021-10-09  0:37 ` [PATCH v5 16/16] x86/tdx: Add cmdline option to force use of ioremap_host_shared Kuppuswamy Sathyanarayanan
2021-10-09  1:45   ` Randy Dunlap
2021-10-09  2:10     ` Kuppuswamy, Sathyanarayanan
2021-10-09 11:04   ` Michael S. Tsirkin
2021-10-11  2:39     ` Andi Kleen
2021-10-11 12:04       ` Michael S. Tsirkin
2021-10-11 17:35         ` Andi Kleen
2021-10-11 18:28           ` Michael S. Tsirkin
2021-10-12 17:55             ` Andi Kleen
2021-10-12 20:59               ` Michael S. Tsirkin
2021-10-12 21:18                 ` Andi Kleen
2021-10-12 21:30                   ` Michael S. Tsirkin
2021-10-15  5:50                     ` Andi Kleen
2021-10-15  6:57                       ` Michael S. Tsirkin
2021-10-15 13:34                         ` Andi Kleen
2021-10-17 22:34                           ` Michael S. Tsirkin

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=a070274e-6a3a-fb0a-68ff-d320d0729377@linux.intel.com \
    --to=ak@linux.intel.com \
    --cc=James.Bottomley@hansenpartnership.com \
    --cc=aarcange@redhat.com \
    --cc=arnd@arndb.de \
    --cc=bhelgaas@google.com \
    --cc=bp@alien8.de \
    --cc=corbet@lwn.net \
    --cc=dan.j.williams@intel.com \
    --cc=dave.hansen@intel.com \
    --cc=davem@davemloft.net \
    --cc=david@redhat.com \
    --cc=deller@gmx.de \
    --cc=hch@infradead.org \
    --cc=hpa@zytor.com \
    --cc=jpoimboe@redhat.com \
    --cc=kirill.shutemov@linux.intel.com \
    --cc=knsathya@kernel.org \
    --cc=linux-alpha@vger.kernel.org \
    --cc=linux-arch@vger.kernel.org \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mips@vger.kernel.org \
    --cc=linux-parisc@vger.kernel.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=luto@kernel.org \
    --cc=mingo@redhat.com \
    --cc=mst@redhat.com \
    --cc=pbonzini@redhat.com \
    --cc=peterz@infradead.org \
    --cc=rth@twiddle.net \
    --cc=sathyanarayanan.kuppuswamy@linux.intel.com \
    --cc=seanjc@google.com \
    --cc=sparclinux@vger.kernel.org \
    --cc=tglx@linutronix.de \
    --cc=tony.luck@intel.com \
    --cc=tsbogend@alpha.franken.de \
    --cc=virtualization@lists.linux-foundation.org \
    --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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).