linux-hyperv.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Michael Kelley <mikelley@microsoft.com>
To: Tianyu Lan <ltykernel@gmail.com>,
	KY Srinivasan <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	"wei.liu@kernel.org" <wei.liu@kernel.org>,
	Dexuan Cui <decui@microsoft.com>,
	"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
	"will@kernel.org" <will@kernel.org>,
	"tglx@linutronix.de" <tglx@linutronix.de>,
	"mingo@redhat.com" <mingo@redhat.com>,
	"bp@alien8.de" <bp@alien8.de>, "x86@kernel.org" <x86@kernel.org>,
	"hpa@zytor.com" <hpa@zytor.com>,
	"dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
	"luto@kernel.org" <luto@kernel.org>,
	"peterz@infradead.org" <peterz@infradead.org>,
	"konrad.wilk@oracle.com" <konrad.wilk@oracle.com>,
	"boris.ostrovsky@oracle.com" <boris.ostrovsky@oracle.com>,
	"jgross@suse.com" <jgross@suse.com>,
	"sstabellini@kernel.org" <sstabellini@kernel.org>,
	"joro@8bytes.org" <joro@8bytes.org>,
	"davem@davemloft.net" <davem@davemloft.net>,
	"kuba@kernel.org" <kuba@kernel.org>,
	"jejb@linux.ibm.com" <jejb@linux.ibm.com>,
	"martin.petersen@oracle.com" <martin.petersen@oracle.com>,
	"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
	"arnd@arndb.de" <arnd@arndb.de>, "hch@lst.de" <hch@lst.de>,
	"m.szyprowski@samsung.com" <m.szyprowski@samsung.com>,
	"robin.murphy@arm.com" <robin.murphy@arm.com>,
	"brijesh.singh@amd.com" <brijesh.singh@amd.com>,
	"thomas.lendacky@amd.com" <thomas.lendacky@amd.com>,
	Tianyu Lan <Tianyu.Lan@microsoft.com>,
	"pgonda@google.com" <pgonda@google.com>,
	"martin.b.radev@gmail.com" <martin.b.radev@gmail.com>,
	"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
	"kirill.shutemov@linux.intel.com"
	<kirill.shutemov@linux.intel.com>,
	"rppt@kernel.org" <rppt@kernel.org>,
	"hannes@cmpxchg.org" <hannes@cmpxchg.org>,
	"aneesh.kumar@linux.ibm.com" <aneesh.kumar@linux.ibm.com>,
	"krish.sadhukhan@oracle.com" <krish.sadhukhan@oracle.com>,
	"saravanand@fb.com" <saravanand@fb.com>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
	"rientjes@google.com" <rientjes@google.com>,
	"ardb@kernel.org" <ardb@kernel.org>
Cc: "iommu@lists.linux-foundation.org"
	<iommu@lists.linux-foundation.org>,
	"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
	"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	vkuznets <vkuznets@redhat.com>,
	"parri.andrea@gmail.com" <parri.andrea@gmail.com>,
	"dave.hansen@intel.com" <dave.hansen@intel.com>
Subject: RE: [PATCH V4 02/13] x86/hyperv: Initialize shared memory boundary in the Isolation VM.
Date: Thu, 2 Sep 2021 00:15:27 +0000	[thread overview]
Message-ID: <MWHPR21MB1593EF63423A2422DA839793D7CE9@MWHPR21MB1593.namprd21.prod.outlook.com> (raw)
In-Reply-To: <20210827172114.414281-3-ltykernel@gmail.com>

From: Tianyu Lan <ltykernel@gmail.com> Sent: Friday, August 27, 2021 10:21 AM
> 
> Hyper-V exposes shared memory boundary via cpuid
> HYPERV_CPUID_ISOLATION_CONFIG and store it in the
> shared_gpa_boundary of ms_hyperv struct. This prepares
> to share memory with host for SNP guest.
> 
> Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
> ---
> Change since v3:
> 	* user BIT_ULL to get shared_gpa_boundary
> 	* Rename field Reserved* to reserved
> ---
>  arch/x86/kernel/cpu/mshyperv.c |  2 ++
>  include/asm-generic/mshyperv.h | 12 +++++++++++-
>  2 files changed, 13 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
> index 20557a9d6e25..8bb001198316 100644
> --- a/arch/x86/kernel/cpu/mshyperv.c
> +++ b/arch/x86/kernel/cpu/mshyperv.c
> @@ -313,6 +313,8 @@ static void __init ms_hyperv_init_platform(void)
>  	if (ms_hyperv.priv_high & HV_ISOLATION) {
>  		ms_hyperv.isolation_config_a = cpuid_eax(HYPERV_CPUID_ISOLATION_CONFIG);
>  		ms_hyperv.isolation_config_b = cpuid_ebx(HYPERV_CPUID_ISOLATION_CONFIG);
> +		ms_hyperv.shared_gpa_boundary =
> +			BIT_ULL(ms_hyperv.shared_gpa_boundary_bits);
> 
>  		pr_info("Hyper-V: Isolation Config: Group A 0x%x, Group B 0x%x\n",
>  			ms_hyperv.isolation_config_a, ms_hyperv.isolation_config_b);
> diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
> index 0924bbd8458e..7537ae1db828 100644
> --- a/include/asm-generic/mshyperv.h
> +++ b/include/asm-generic/mshyperv.h
> @@ -35,7 +35,17 @@ struct ms_hyperv_info {
>  	u32 max_vp_index;
>  	u32 max_lp_index;
>  	u32 isolation_config_a;
> -	u32 isolation_config_b;
> +	union {
> +		u32 isolation_config_b;
> +		struct {
> +			u32 cvm_type : 4;
> +			u32 reserved11 : 1;
> +			u32 shared_gpa_boundary_active : 1;
> +			u32 shared_gpa_boundary_bits : 6;
> +			u32 reserved12 : 20;

I'm still curious about the "11" and "12" in the reserved
field names.  Why not just "reserved1" and "reserved2"?
Having the "11" and "12" isn't wrong, but it makes one
wonder why since it's not usual. :-)

> +		};
> +	};
> +	u64 shared_gpa_boundary;
>  };
>  extern struct ms_hyperv_info ms_hyperv;
> 
> --
> 2.25.1


  reply	other threads:[~2021-09-02  0:15 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-27 17:20 [PATCH V4 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Tianyu Lan
2021-08-27 17:20 ` [PATCH V4 01/13] x86/hyperv: Initialize GHCB page in Isolation VM Tianyu Lan
2021-09-02  0:15   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 02/13] x86/hyperv: Initialize shared memory boundary in the " Tianyu Lan
2021-09-02  0:15   ` Michael Kelley [this message]
2021-09-02  6:35     ` Tianyu Lan
2021-08-27 17:21 ` [PATCH V4 03/13] x86/hyperv: Add new hvcall guest address host visibility support Tianyu Lan
2021-09-02  0:16   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 04/13] hyperv: Mark vmbus ring buffer visible to host in Isolation VM Tianyu Lan
2021-08-27 17:41   ` Greg KH
2021-08-27 17:44     ` Tianyu Lan
2021-09-02  0:17   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 05/13] hyperv: Add Write/Read MSR registers via ghcb page Tianyu Lan
2021-08-27 17:41   ` Greg KH
2021-08-27 17:46     ` Tianyu Lan
2021-09-02  3:32   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 06/13] hyperv: Add ghcb hvcall support for SNP VM Tianyu Lan
2021-09-02  0:20   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 07/13] hyperv/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan
2021-09-02  0:21   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 08/13] hyperv/vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan
2021-09-02  0:23   ` Michael Kelley
2021-09-02 13:35     ` Tianyu Lan
2021-09-02 16:14       ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 09/13] DMA: Add dma_map_decrypted/dma_unmap_encrypted() function Tianyu Lan
2021-08-27 17:21 ` [PATCH V4 10/13] x86/Swiotlb: Add Swiotlb bounce buffer remap function for HV IVM Tianyu Lan
2021-08-27 17:21 ` [PATCH V4 11/13] hyperv/IOMMU: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-09-02  1:27   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 12/13] hv_netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-09-02  2:34   ` Michael Kelley
2021-09-02  4:56     ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 13/13] hv_storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-09-02  2:08   ` Michael Kelley
2021-08-30 12:00 ` [PATCH V4 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Christoph Hellwig
2021-08-31 15:20   ` Tianyu Lan
2021-09-02  7:51     ` Christoph Hellwig
2021-08-31 17:16   ` Michael Kelley
2021-09-02  7:59     ` Christoph Hellwig
2021-09-02 11:21       ` Tianyu Lan
2021-09-02 15:57       ` Michael Kelley
2021-09-14 14:41         ` Tianyu Lan

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=MWHPR21MB1593EF63423A2422DA839793D7CE9@MWHPR21MB1593.namprd21.prod.outlook.com \
    --to=mikelley@microsoft.com \
    --cc=Tianyu.Lan@microsoft.com \
    --cc=akpm@linux-foundation.org \
    --cc=aneesh.kumar@linux.ibm.com \
    --cc=ardb@kernel.org \
    --cc=arnd@arndb.de \
    --cc=boris.ostrovsky@oracle.com \
    --cc=bp@alien8.de \
    --cc=brijesh.singh@amd.com \
    --cc=catalin.marinas@arm.com \
    --cc=dave.hansen@intel.com \
    --cc=dave.hansen@linux.intel.com \
    --cc=davem@davemloft.net \
    --cc=decui@microsoft.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=haiyangz@microsoft.com \
    --cc=hannes@cmpxchg.org \
    --cc=hch@lst.de \
    --cc=hpa@zytor.com \
    --cc=iommu@lists.linux-foundation.org \
    --cc=jejb@linux.ibm.com \
    --cc=jgross@suse.com \
    --cc=joro@8bytes.org \
    --cc=kirill.shutemov@linux.intel.com \
    --cc=konrad.wilk@oracle.com \
    --cc=krish.sadhukhan@oracle.com \
    --cc=kuba@kernel.org \
    --cc=kys@microsoft.com \
    --cc=linux-arch@vger.kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-hyperv@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-scsi@vger.kernel.org \
    --cc=ltykernel@gmail.com \
    --cc=luto@kernel.org \
    --cc=m.szyprowski@samsung.com \
    --cc=martin.b.radev@gmail.com \
    --cc=martin.petersen@oracle.com \
    --cc=mingo@redhat.com \
    --cc=netdev@vger.kernel.org \
    --cc=parri.andrea@gmail.com \
    --cc=peterz@infradead.org \
    --cc=pgonda@google.com \
    --cc=rientjes@google.com \
    --cc=robin.murphy@arm.com \
    --cc=rppt@kernel.org \
    --cc=saravanand@fb.com \
    --cc=sstabellini@kernel.org \
    --cc=sthemmin@microsoft.com \
    --cc=tglx@linutronix.de \
    --cc=thomas.lendacky@amd.com \
    --cc=vkuznets@redhat.com \
    --cc=wei.liu@kernel.org \
    --cc=will@kernel.org \
    --cc=x86@kernel.org \
    --cc=xen-devel@lists.xenproject.org \
    --subject='RE: [PATCH V4 02/13] x86/hyperv: Initialize shared memory boundary in the Isolation VM.' \
    /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

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).