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From: Tianyu Lan <ltykernel@gmail.com>
To: kys@microsoft.com, haiyangz@microsoft.com,
	sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com,
	tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
	x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com,
	luto@kernel.org, peterz@infradead.org, davem@davemloft.net,
	kuba@kernel.org, gregkh@linuxfoundation.org, arnd@arndb.de,
	jroedel@suse.de, brijesh.singh@amd.com, Tianyu.Lan@microsoft.com,
	thomas.lendacky@amd.com, pgonda@google.com,
	akpm@linux-foundation.org, kirill.shutemov@linux.intel.com,
	rppt@kernel.org, tj@kernel.org, aneesh.kumar@linux.ibm.com,
	saravanand@fb.com, hannes@cmpxchg.org, rientjes@google.com,
	michael.h.kelley@microsoft.com
Cc: linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	vkuznets@redhat.com, konrad.wilk@oracle.com, hch@lst.de,
	robin.murphy@arm.com, joro@8bytes.org, parri.andrea@gmail.com,
	dave.hansen@intel.com
Subject: [PATCH V7 2/9] x86/hyperv: Initialize shared memory boundary in the Isolation VM.
Date: Wed,  6 Oct 2021 02:36:42 -0400	[thread overview]
Message-ID: <20211006063651.1124737-3-ltykernel@gmail.com> (raw)
In-Reply-To: <20211006063651.1124737-1-ltykernel@gmail.com>

From: Tianyu Lan <Tianyu.Lan@microsoft.com>

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 v4:
	* Rename reserve field.

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 b09ade389040..4794b716ec79 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 2a709010f53d..ebe3727e1eb8 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 reserved1 : 1;
+			u32 shared_gpa_boundary_active : 1;
+			u32 shared_gpa_boundary_bits : 6;
+			u32 reserved2 : 20;
+		};
+	};
+	u64 shared_gpa_boundary;
 };
 extern struct ms_hyperv_info ms_hyperv;
 
-- 
2.25.1


  parent reply	other threads:[~2021-10-06  6:37 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-06  6:36 [PATCH V7 0/9] x86/Hyper-V: Add Hyper-V Isolation VM support(First part) Tianyu Lan
2021-10-06  6:36 ` [PATCH V7 1/9] x86/hyperv: Initialize GHCB page in Isolation VM Tianyu Lan
2021-10-06  6:36 ` Tianyu Lan [this message]
2021-10-06  6:36 ` [PATCH V7 3/9] x86/hyperv: Add new hvcall guest address host visibility support Tianyu Lan
2021-10-06  6:36 ` [PATCH V7 4/9] Drivers: hv: vmbus: Mark vmbus ring buffer visible to host in Isolation VM Tianyu Lan
2021-10-06  6:36 ` [PATCH V7 5/9] x86/sev-es: Expose __sev_es_ghcb_hv_call() to call ghcb hv call out of sev code Tianyu Lan
2021-10-11 14:42   ` Tianyu Lan
2021-10-11 17:22     ` Borislav Petkov
2021-10-12 14:13       ` Tianyu Lan
2021-10-13 14:24       ` Tianyu Lan
2021-10-18 12:19         ` Tianyu Lan
2021-10-19 13:57           ` Borislav Petkov
2021-10-20  6:23           ` [PATCH] " Tianyu Lan
2021-10-20  9:59             ` Borislav Petkov
2021-10-20 12:39               ` Tianyu Lan
2021-10-20 13:39                 ` Borislav Petkov
2021-10-20 13:56                   ` Tom Lendacky
2021-10-20 14:23                     ` Tianyu Lan
2021-10-20 14:39                       ` Borislav Petkov
2021-10-20 15:09                         ` Tianyu Lan
2021-10-20 16:24                           ` Borislav Petkov
2021-10-21 15:42                             ` Tianyu Lan
2021-10-06  6:36 ` [PATCH V7 6/9] x86/hyperv: Add Write/Read MSR registers via ghcb page Tianyu Lan
2021-10-06  6:36 ` [PATCH V7 7/9] x86/hyperv: Add ghcb hvcall support for SNP VM Tianyu Lan
2021-10-06  6:36 ` [PATCH V7 8/9] Drivers: hv: vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan
2021-10-06  6:36 ` [PATCH V7 9/9] Drivers: hv : vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan

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