From: Tianyu Lan <ltykernel@gmail.com>
To: "bp@alien8.de" <bp@alien8.de>
Cc: linux-kernel@vger.kernel.org, vkuznets@redhat.com,
brijesh.singh@amd.com, konrad.wilk@oracle.com, hch@lst.de,
wei.liu@kernel.org, robin.murphy@arm.com, joro@8bytes.org,
parri.andrea@gmail.com, dave.hansen@intel.com,
linux-hyperv@vger.kernel.org, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com,
x86@kernel.org, hpa@zytor.com, thomas.lendacky@amd.com,
Tianyu.Lan@microsoft.com, michael.h.kelley@microsoft.com,
kys@microsoft.com
Subject: Re: [PATCH V6.1] x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has()
Date: Wed, 8 Dec 2021 23:12:37 +0800 [thread overview]
Message-ID: <70ac7c29-6d04-b08a-f057-0461da19c307@gmail.com> (raw)
In-Reply-To: <20211208145228.42048-1-ltykernel@gmail.com>
On 12/8/2021 10:52 PM, Tianyu Lan wrote:
> From: Tianyu Lan <Tianyu.Lan@microsoft.com>
>
> Hyper-V provides Isolation VM which encrypt guest memory. In
> isolation VM, swiotlb bounce buffer size needs to adjust
> according to memory size in the sev_setup_arch(). Add GUEST_MEM_
> ENCRYPT check in the Isolation VM.
>
> Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Hi Boris:
Could you check whether this version is ok with you?
Thanks.
> ---
> Change since v6:
> * Change the order in the cc_platform_has() and check sev first.
>
> Change since v3:
> * Change code style of checking GUEST_MEM attribute in the
> hyperv_cc_platform_has().
> ---
> arch/x86/kernel/cc_platform.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/arch/x86/kernel/cc_platform.c b/arch/x86/kernel/cc_platform.c
> index 03bb2f343ddb..6cb3a675e686 100644
> --- a/arch/x86/kernel/cc_platform.c
> +++ b/arch/x86/kernel/cc_platform.c
> @@ -11,6 +11,7 @@
> #include <linux/cc_platform.h>
> #include <linux/mem_encrypt.h>
>
> +#include <asm/mshyperv.h>
> #include <asm/processor.h>
>
> static bool __maybe_unused intel_cc_platform_has(enum cc_attr attr)
> @@ -58,12 +59,19 @@ static bool amd_cc_platform_has(enum cc_attr attr)
> #endif
> }
>
> +static bool hyperv_cc_platform_has(enum cc_attr attr)
> +{
> + return attr == CC_ATTR_GUEST_MEM_ENCRYPT;
> +}
>
> bool cc_platform_has(enum cc_attr attr)
> {
> if (sme_me_mask)
> return amd_cc_platform_has(attr);
>
> + if (hv_is_isolation_supported())
> + return hyperv_cc_platform_has(attr);
> +
> return false;
> }
> EXPORT_SYMBOL_GPL(cc_platform_has);
>
next prev parent reply other threads:[~2021-12-08 15:12 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-07 7:55 [PATCH V6 0/5] x86/Hyper-V: Add Hyper-V Isolation VM support(Second part) Tianyu Lan
2021-12-07 7:55 ` [PATCH V6 1/5] swiotlb: Add swiotlb bounce buffer remap function for HV IVM Tianyu Lan
2021-12-07 7:55 ` [PATCH V6 2/5] x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has() Tianyu Lan
2021-12-07 9:47 ` Borislav Petkov
2021-12-07 11:18 ` Tianyu Lan
2021-12-08 14:52 ` [PATCH V6.1] " Tianyu Lan
2021-12-08 15:12 ` Tianyu Lan [this message]
2021-12-09 20:38 ` [PATCH V6 2/5] " Michael Kelley (LINUX)
2021-12-10 11:26 ` Tianyu Lan
2021-12-07 7:55 ` [PATCH V6 3/5] hyper-v: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-12-09 20:09 ` Michael Kelley (LINUX)
2021-12-10 13:25 ` Tianyu Lan
2021-12-10 14:01 ` Tianyu Lan
2021-12-07 7:56 ` [PATCH V6 4/5] scsi: storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-12-09 8:00 ` Long Li
2021-12-09 11:17 ` Tianyu Lan
2021-12-07 7:56 ` [PATCH V6 5/5] net: netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-12-08 20:14 ` Haiyang Zhang
2021-12-09 8:08 ` Tianyu Lan
2021-12-09 19:54 ` Michael Kelley (LINUX)
2021-12-09 20:40 ` Haiyang Zhang
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