From: Mark Rutland <mark.rutland@arm.com>
To: Michael Kelley <mikelley@microsoft.com>
Cc: will@kernel.org, catalin.marinas@arm.com,
lorenzo.pieralisi@arm.com, sudeep.holla@arm.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
linux-efi@vger.kernel.org, arnd@arndb.de, wei.liu@kernel.org,
ardb@kernel.org, daniel.lezcano@linaro.org, kys@microsoft.com
Subject: Re: [PATCH v10 2/7] arm64: hyperv: Add Hyper-V hypercall and register access utilities
Date: Fri, 14 May 2021 13:52:43 +0100 [thread overview]
Message-ID: <20210514125243.GC30645@C02TD0UTHF1T.local> (raw)
In-Reply-To: <1620841067-46606-3-git-send-email-mikelley@microsoft.com>
On Wed, May 12, 2021 at 10:37:42AM -0700, Michael Kelley wrote:
> hyperv-tlfs.h defines Hyper-V interfaces from the Hyper-V Top Level
> Functional Spec (TLFS), and #includes the architecture-independent
> part of hyperv-tlfs.h in include/asm-generic. The published TLFS
> is distinctly oriented to x86/x64, so the ARM64-specific
> hyperv-tlfs.h includes information for ARM64 that is not yet formally
> published. The TLFS is available here:
>
> docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs
>
> mshyperv.h defines Linux-specific structures and routines for
> interacting with Hyper-V on ARM64, and #includes the architecture-
> independent part of mshyperv.h in include/asm-generic.
>
> Use these definitions to provide utility functions to make
> Hyper-V hypercalls and to get and set Hyper-V provided
> registers associated with a virtual processor.
>
> Signed-off-by: Michael Kelley <mikelley@microsoft.com>
> Reviewed-by: Sunil Muthuswamy <sunilmut@microsoft.com>
> ---
> MAINTAINERS | 3 +
> arch/arm64/Kbuild | 1 +
> arch/arm64/hyperv/Makefile | 2 +
> arch/arm64/hyperv/hv_core.c | 130 +++++++++++++++++++++++++++++++++++
> arch/arm64/include/asm/hyperv-tlfs.h | 69 +++++++++++++++++++
> arch/arm64/include/asm/mshyperv.h | 54 +++++++++++++++
> 6 files changed, 259 insertions(+)
> create mode 100644 arch/arm64/hyperv/Makefile
> create mode 100644 arch/arm64/hyperv/hv_core.c
> create mode 100644 arch/arm64/include/asm/hyperv-tlfs.h
> create mode 100644 arch/arm64/include/asm/mshyperv.h
> +/*
> + * hv_do_hypercall- Invoke the specified hypercall
> + */
> +u64 hv_do_hypercall(u64 control, void *input, void *output)
> +{
> + struct arm_smccc_res res;
> + u64 input_address;
> + u64 output_address;
> +
> + input_address = input ? virt_to_phys(input) : 0;
> + output_address = output ? virt_to_phys(output) : 0;
I may have asked this before, but are `input` and `output` always linear
map pointers, or can they ever be vmalloc pointers?
Otherwise, this looks fine to me.
Mark.
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-05-14 12:54 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-12 17:37 [PATCH v10 0/7] Enable Linux guests on Hyper-V on ARM64 Michael Kelley
2021-05-12 17:37 ` [PATCH v10 1/7] asm-generic: hyperv: Fix incorrect architecture dependencies Michael Kelley
2021-05-12 17:37 ` [PATCH v10 2/7] arm64: hyperv: Add Hyper-V hypercall and register access utilities Michael Kelley
2021-05-14 12:52 ` Mark Rutland [this message]
2021-05-14 15:14 ` Michael Kelley
2021-05-17 11:44 ` Mark Rutland
2021-05-17 16:41 ` Michael Kelley
2021-05-12 17:37 ` [PATCH v10 3/7] arm64: hyperv: Add Hyper-V clocksource/clockevent support Michael Kelley
2021-05-14 12:37 ` Mark Rutland
2021-05-14 15:35 ` Michael Kelley
2021-05-17 13:08 ` Mark Rutland
2021-05-17 17:27 ` Michael Kelley
2021-05-18 17:00 ` Mark Rutland
2021-06-08 15:36 ` Michael Kelley
2021-06-10 16:45 ` Mark Rutland
2021-06-14 2:42 ` Michael Kelley
2021-06-16 20:17 ` Michael Kelley
2021-06-22 9:54 ` Mark Rutland
2021-06-23 8:56 ` Marc Zyngier
2021-06-28 2:21 ` Michael Kelley
2021-05-12 17:37 ` [PATCH v10 4/7] arm64: hyperv: Add kexec and panic handlers Michael Kelley
2021-05-12 17:37 ` [PATCH v10 5/7] arm64: hyperv: Initialize hypervisor on boot Michael Kelley
2021-05-13 15:16 ` Wei Liu
2021-05-12 17:37 ` [PATCH v10 6/7] arm64: efi: Export screen_info Michael Kelley
2021-05-12 17:37 ` [PATCH v10 7/7] Drivers: hv: Enable Hyper-V code to be built on ARM64 Michael Kelley
2021-05-13 13:17 ` [PATCH v10 0/7] Enable Linux guests on Hyper-V " Sudeep Holla
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=20210514125243.GC30645@C02TD0UTHF1T.local \
--to=mark.rutland@arm.com \
--cc=ardb@kernel.org \
--cc=arnd@arndb.de \
--cc=catalin.marinas@arm.com \
--cc=daniel.lezcano@linaro.org \
--cc=kys@microsoft.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-efi@vger.kernel.org \
--cc=linux-hyperv@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lorenzo.pieralisi@arm.com \
--cc=mikelley@microsoft.com \
--cc=sudeep.holla@arm.com \
--cc=wei.liu@kernel.org \
--cc=will@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).