From: Borislav Petkov <bp@suse.de>
To: Brijesh Singh <brijesh.singh@amd.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
simon.guinot@sequanux.org, linux-efi@vger.kernel.org,
kvm@vger.kernel.org, rkrcmar@redhat.com,
matt@codeblueprint.co.uk, linux-pci@vger.kernel.org,
linus.walleij@linaro.org, gary.hook@amd.com, linux-mm@kvack.org,
paul.gortmaker@windriver.com, hpa@zytor.com, cl@linux.com,
dan.j.williams@intel.com, aarcange@redhat.com,
sfr@canb.auug.org.au, andriy.shevchenko@linux.intel.com,
herbert@gondor.apana.org.au, bhe@redhat.com, xemul@parallels.com,
joro@8bytes.org, x86@kernel.org, peterz@infradead.org,
piotr.luc@intel.com, mingo@redhat.com, msalter@redhat.com,
ross.zwisler@linux.intel.com, dyoung@redhat.com,
thomas.lendacky@amd.com, jroedel@suse.de, keescook@chromium.org,
arnd@arndb.de, toshi.kani@hpe.com,
mathieu.desnoyers@efficios.com, luto@kernel.org,
devel@linuxdriverproject.org, bhelgaas@google.com,
tglx@linutronix.de, mchehab@kernel.org, iamjoonsoo.kim@lge.com,
labbott@fedo.suse.de
Subject: Re: [RFC PATCH v2 14/32] x86: mm: Provide support to use memblock when spliting large pages
Date: Thu, 6 Apr 2017 19:25:20 +0200 [thread overview]
Message-ID: <20170406172520.iyjjtz56u3jlnjhq@pd.tnic> (raw)
In-Reply-To: <f46ff1e1-1cc7-1907-74a0-e2709fa1e5fb@amd.com>
Hi Brijesh,
On Thu, Apr 06, 2017 at 09:05:03AM -0500, Brijesh Singh wrote:
> I looked into arch/x86/mm/init_{32,64}.c and as you pointed the file contains
> routines to do basic page splitting. I think it sufficient for our usage.
Good :)
> I should be able to drop the memblock patch from the series and update the
> Patch 15 [1] to use the kernel_physical_mapping_init().
>
> The kernel_physical_mapping_init() creates the page table mapping using
> default KERNEL_PAGE attributes, I tried to extend the function by passing
> 'bool enc' flags to hint whether to clr or set _PAGE_ENC when splitting the
> pages. The code did not looked clean hence I dropped that idea.
Or, you could have a
__kernel_physical_mapping_init_prot(..., prot)
helper which gets a protection argument and hands it down. The lower
levels already hand down prot which is good.
The interface kernel_physical_mapping_init() will then itself call:
__kernel_physical_mapping_init_prot(..., PAGE_KERNEL);
for the normal cases.
That in a pre-patch of course.
How does that sound?
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix ImendA?rffer, Jane Smithard, Graham Norton, HRB 21284 (AG NA 1/4 rnberg)
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next prev parent reply other threads:[~2017-04-06 17:25 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-02 15:12 [RFC PATCH v2 00/32] x86: Secure Encrypted Virtualization (AMD) Brijesh Singh
2017-03-02 15:12 ` [RFC PATCH v2 01/32] x86: Add the Secure Encrypted Virtualization CPU feature Brijesh Singh
2017-03-03 16:59 ` Borislav Petkov
2017-03-03 21:01 ` Brijesh Singh
2017-03-04 10:11 ` Borislav Petkov
2017-03-06 18:11 ` Brijesh Singh
2017-03-06 20:54 ` Borislav Petkov
2017-03-02 15:12 ` [RFC PATCH v2 02/32] x86: Secure Encrypted Virtualization (SEV) support Brijesh Singh
2017-03-07 11:19 ` Borislav Petkov
2017-03-08 15:06 ` Borislav Petkov
2017-03-02 15:12 ` [RFC PATCH v2 03/32] KVM: SVM: prepare for new bit definition in nested_ctl Brijesh Singh
2017-03-02 15:12 ` [RFC PATCH v2 04/32] KVM: SVM: Add SEV feature definitions to KVM Brijesh Singh
2017-03-07 0:50 ` Borislav Petkov
2017-03-02 15:12 ` [RFC PATCH v2 05/32] x86: Use encrypted access of BOOT related data with SEV Brijesh Singh
2017-03-07 11:09 ` Borislav Petkov
2017-03-16 19:03 ` Tom Lendacky
2017-03-02 15:13 ` [RFC PATCH v2 06/32] x86/pci: Use memremap when walking setup data Brijesh Singh
2017-03-03 20:42 ` Bjorn Helgaas
2017-03-03 21:15 ` Tom Lendacky
2017-03-07 0:03 ` Bjorn Helgaas
2017-03-13 20:08 ` Tom Lendacky
2017-03-02 15:13 ` [RFC PATCH v2 07/32] x86/efi: Access EFI data as encrypted when SEV is active Brijesh Singh
2017-03-07 11:57 ` Borislav Petkov
2017-03-02 15:13 ` [RFC PATCH v2 08/32] x86: Use PAGE_KERNEL protection for ioremap of memory page Brijesh Singh
2017-03-07 14:59 ` Borislav Petkov
2017-03-16 20:04 ` Tom Lendacky
2017-03-17 14:32 ` Tom Lendacky
2017-03-17 14:55 ` Tom Lendacky
2017-03-02 15:13 ` [RFC PATCH v2 09/32] x86: Change early_ioremap to early_memremap for BOOT data Brijesh Singh
2017-03-08 8:46 ` Borislav Petkov
2017-03-02 15:14 ` [RFC PATCH v2 10/32] x86: DMA support for SEV memory encryption Brijesh Singh
2017-03-08 10:56 ` Borislav Petkov
2017-03-02 15:14 ` [RFC PATCH v2 11/32] x86: Unroll string I/O when SEV is active Brijesh Singh
2017-03-02 15:14 ` [RFC PATCH v2 12/32] x86: Add early boot support when running with SEV active Brijesh Singh
2017-03-09 14:07 ` Borislav Petkov
2017-03-09 16:13 ` Paolo Bonzini
2017-03-09 16:29 ` Borislav Petkov
2017-03-10 16:35 ` Brijesh Singh
2017-03-16 10:16 ` Borislav Petkov
2017-03-16 14:28 ` Tom Lendacky
2017-03-16 15:09 ` Borislav Petkov
2017-03-16 16:11 ` Tom Lendacky
2017-03-16 16:29 ` Borislav Petkov
2017-03-02 15:15 ` [RFC PATCH v2 13/32] KVM: SVM: Enable SEV by setting the SEV_ENABLE CPU feature Brijesh Singh
2017-03-09 19:29 ` Borislav Petkov
2017-03-02 15:15 ` [RFC PATCH v2 14/32] x86: mm: Provide support to use memblock when spliting large pages Brijesh Singh
2017-03-10 11:06 ` Borislav Petkov
2017-03-10 22:41 ` Brijesh Singh
2017-03-16 13:15 ` Paolo Bonzini
2017-03-16 18:28 ` Borislav Petkov
2017-03-16 22:25 ` Paolo Bonzini
2017-03-17 10:17 ` Borislav Petkov
2017-03-17 10:47 ` Paolo Bonzini
2017-03-17 10:56 ` Borislav Petkov
2017-03-17 11:03 ` Paolo Bonzini
2017-03-17 11:33 ` Borislav Petkov
2017-03-17 14:45 ` Paolo Bonzini
2017-03-18 16:37 ` Borislav Petkov
2017-04-06 14:05 ` Brijesh Singh
2017-04-06 17:25 ` Borislav Petkov [this message]
2017-04-06 18:37 ` Brijesh Singh
2017-04-07 11:33 ` Borislav Petkov
2017-04-07 14:50 ` Brijesh Singh
2017-03-16 12:28 ` Paolo Bonzini
2017-03-02 15:15 ` [RFC PATCH v2 15/32] x86: Add support for changing memory encryption attribute in early boot Brijesh Singh
2017-03-24 17:12 ` Borislav Petkov
2017-03-27 15:07 ` Brijesh Singh
2017-03-02 15:15 ` [RFC PATCH v2 16/32] x86: kvm: Provide support to create Guest and HV shared per-CPU variables Brijesh Singh
2017-03-16 11:06 ` Paolo Bonzini
2017-03-28 18:39 ` Borislav Petkov
2017-03-29 15:21 ` Paolo Bonzini
2017-03-29 15:32 ` Borislav Petkov
2017-03-02 15:15 ` [RFC PATCH v2 17/32] x86: kvmclock: Clear encryption attribute when SEV is active Brijesh Singh
2017-03-02 15:16 ` [RFC PATCH v2 18/32] kvm: svm: Use the hardware provided GPA instead of page walk Brijesh Singh
2017-03-29 15:14 ` Borislav Petkov
2017-03-29 17:08 ` Brijesh Singh
2017-03-02 15:16 ` [RFC PATCH v2 19/32] crypto: ccp: Introduce the AMD Secure Processor device Brijesh Singh
2017-03-02 17:39 ` Mark Rutland
2017-03-02 19:11 ` Brijesh Singh
2017-03-03 13:55 ` Andy Shevchenko
2017-03-02 15:16 ` [RFC PATCH v2 20/32] crypto: ccp: Add Platform Security Processor (PSP) interface support Brijesh Singh
2017-03-02 15:16 ` [RFC PATCH v2 21/32] crypto: ccp: Add Secure Encrypted Virtualization (SEV) " Brijesh Singh
2017-03-02 15:16 ` [RFC PATCH v2 22/32] kvm: svm: prepare to reserve asid for SEV guest Brijesh Singh
2017-03-02 15:17 ` [RFC PATCH v2 23/32] kvm: introduce KVM_MEMORY_ENCRYPT_OP ioctl Brijesh Singh
2017-03-16 10:25 ` Paolo Bonzini
2017-03-02 15:17 ` [RFC PATCH v2 24/32] kvm: x86: prepare for SEV guest management API support Brijesh Singh
2017-03-16 10:33 ` Paolo Bonzini
2017-03-02 15:17 ` [RFC PATCH v2 25/32] kvm: svm: Add support for SEV LAUNCH_START command Brijesh Singh
2017-03-02 15:17 ` [RFC PATCH v2 26/32] kvm: svm: Add support for SEV LAUNCH_UPDATE_DATA command Brijesh Singh
2017-03-16 10:48 ` Paolo Bonzini
2017-03-16 18:20 ` Brijesh Singh
2017-03-02 15:17 ` [RFC PATCH v2 27/32] kvm: svm: Add support for SEV LAUNCH_FINISH command Brijesh Singh
2017-03-02 15:18 ` [RFC PATCH v2 28/32] kvm: svm: Add support for SEV GUEST_STATUS command Brijesh Singh
2017-03-02 15:18 ` [RFC PATCH v2 29/32] kvm: svm: Add support for SEV DEBUG_DECRYPT command Brijesh Singh
2017-03-16 10:54 ` Paolo Bonzini
2017-03-16 18:41 ` Brijesh Singh
2017-03-17 11:09 ` Paolo Bonzini
2017-03-02 15:18 ` [RFC PATCH v2 30/32] kvm: svm: Add support for SEV DEBUG_ENCRYPT command Brijesh Singh
2017-03-16 11:03 ` Paolo Bonzini
2017-03-16 18:34 ` Brijesh Singh
2017-03-02 15:18 ` [RFC PATCH v2 31/32] kvm: svm: Add support for SEV LAUNCH_MEASURE command Brijesh Singh
2017-03-02 15:18 ` [RFC PATCH v2 32/32] x86: kvm: Pin the guest memory when SEV is active Brijesh Singh
2017-03-16 10:38 ` Paolo Bonzini
2017-03-16 18:17 ` Brijesh Singh
2017-03-03 20:33 ` [RFC PATCH v2 00/32] x86: Secure Encrypted Virtualization (AMD) Bjorn Helgaas
2017-03-03 20:51 ` Borislav Petkov
2017-03-03 21:15 ` Brijesh Singh
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