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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, konrad.wilk@oracle.com,
	boris.ostrovsky@oracle.com, jgross@suse.com,
	sstabellini@kernel.org, joro@8bytes.org, will@kernel.org,
	davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com,
	martin.petersen@oracle.com, arnd@arndb.de, hch@lst.de,
	m.szyprowski@samsung.com, robin.murphy@arm.com, rppt@kernel.org,
	akpm@linux-foundation.org, kirill.shutemov@linux.intel.com,
	Tianyu.Lan@microsoft.com, thomas.lendacky@amd.com,
	ardb@kernel.org, nramas@linux.microsoft.com, robh@kernel.org,
	keescook@chromium.org, rientjes@google.com, pgonda@google.com,
	martin.b.radev@gmail.com, hannes@cmpxchg.org, saravanand@fb.com,
	krish.sadhukhan@oracle.com, xen-devel@lists.xenproject.org,
	tj@kernel.org, michael.h.kelley@microsoft.com
Cc: iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org,
	linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-scsi@vger.kernel.org, netdev@vger.kernel.org,
	vkuznets@redhat.com, brijesh.singh@amd.com,
	anparri@microsoft.com
Subject: [RFC PATCH V4 12/12] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM
Date: Wed,  7 Jul 2021 11:34:53 -0400	[thread overview]
Message-ID: <20210707153456.3976348-13-ltykernel@gmail.com> (raw)
In-Reply-To: <20210707153456.3976348-1-ltykernel@gmail.com>

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

Hyper-V Isolation VM reuses set_memory_decrypted/encrypted function
and not needs to decrypt/encrypt memory in arch_kexec_post_alloc(pre_free)
_pages() just likes AMD SEV VM. So skip them.

Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
---
 arch/x86/kernel/machine_kexec_64.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index c078b0d3ab0e..0cadc64b6873 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -26,6 +26,7 @@
 #include <asm/kexec-bzimage64.h>
 #include <asm/setup.h>
 #include <asm/set_memory.h>
+#include <asm/mshyperv.h>
 
 #ifdef CONFIG_ACPI
 /*
@@ -598,7 +599,7 @@ void arch_kexec_unprotect_crashkres(void)
  */
 int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages, gfp_t gfp)
 {
-	if (sev_active())
+	if (sev_active() || hv_is_isolation_supported())
 		return 0;
 
 	/*
@@ -611,7 +612,7 @@ int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages, gfp_t gfp)
 
 void arch_kexec_pre_free_pages(void *vaddr, unsigned int pages)
 {
-	if (sev_active())
+	if (sev_active() || hv_is_isolation_supported())
 		return;
 
 	/*
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
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, konrad.wilk@oracle.com,
	boris.ostrovsky@oracle.com, jgross@suse.com,
	sstabellini@kernel.org, joro@8bytes.org, will@kernel.org,
	davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com,
	martin.petersen@oracle.com, arnd@arndb.de, hch@lst.de,
	m.szyprowski@samsung.com, robin.murphy@arm.com, rppt@kernel.org,
	akpm@linux-foundation.org, kirill.shutemov@linux.intel.com,
	Tianyu.Lan@microsoft.com, thomas.lendacky@amd.com,
	ardb@kernel.org, nramas@linux.microsoft.com, robh@kernel.org,
	keescook@chromium.org, rientjes@google.com, pgonda@google.com,
	martin.b.radev@gmail.com, hannes@cmpxchg.org, saravanand@fb.com,
	krish.sadhukhan@oracle.com, xen-devel@lists.xenproject.org,
	tj@kernel.org, michael.h.kelley@microsoft.com
Cc: linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org,
	brijesh.singh@amd.com, linux-scsi@vger.kernel.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	iommu@lists.linux-foundation.org, anparri@microsoft.com,
	vkuznets@redhat.com
Subject: [RFC PATCH V4 12/12] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM
Date: Wed,  7 Jul 2021 11:34:53 -0400	[thread overview]
Message-ID: <20210707153456.3976348-13-ltykernel@gmail.com> (raw)
In-Reply-To: <20210707153456.3976348-1-ltykernel@gmail.com>

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

Hyper-V Isolation VM reuses set_memory_decrypted/encrypted function
and not needs to decrypt/encrypt memory in arch_kexec_post_alloc(pre_free)
_pages() just likes AMD SEV VM. So skip them.

Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
---
 arch/x86/kernel/machine_kexec_64.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index c078b0d3ab0e..0cadc64b6873 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -26,6 +26,7 @@
 #include <asm/kexec-bzimage64.h>
 #include <asm/setup.h>
 #include <asm/set_memory.h>
+#include <asm/mshyperv.h>
 
 #ifdef CONFIG_ACPI
 /*
@@ -598,7 +599,7 @@ void arch_kexec_unprotect_crashkres(void)
  */
 int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages, gfp_t gfp)
 {
-	if (sev_active())
+	if (sev_active() || hv_is_isolation_supported())
 		return 0;
 
 	/*
@@ -611,7 +612,7 @@ int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages, gfp_t gfp)
 
 void arch_kexec_pre_free_pages(void *vaddr, unsigned int pages)
 {
-	if (sev_active())
+	if (sev_active() || hv_is_isolation_supported())
 		return;
 
 	/*
-- 
2.25.1

_______________________________________________
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iommu@lists.linux-foundation.org
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  parent reply	other threads:[~2021-07-07 15:35 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-07 15:34 [RFC PATCH V4 00/12] x86/Hyper-V: Add Hyper-V Isolation VM support Tianyu Lan
2021-07-07 15:34 ` Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 01/12] x86/HV: Initialize shared memory boundary in the Isolation VM Tianyu Lan
2021-07-07 15:34   ` Tianyu Lan
2021-07-08  7:34   ` Olaf Hering
2021-07-08  7:34     ` Olaf Hering
2021-07-08 14:40     ` Tianyu Lan
2021-07-08 14:40       ` Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 02/12] x86/HV: Add new hvcall guest address host visibility support Tianyu Lan
2021-07-07 15:34   ` Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 03/12] HV: Mark vmbus ring buffer visible to host in Isolation VM Tianyu Lan
2021-07-07 15:34   ` Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 04/12] HV: Add Write/Read MSR registers via ghcb page Tianyu Lan
2021-07-07 15:34   ` Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 05/12] HV: Add ghcb hvcall support for SNP VM Tianyu Lan
2021-07-07 15:34   ` Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 06/12] HV/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan
2021-07-07 15:34   ` Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 07/12] HV/Vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan
2021-07-07 15:34   ` Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 08/12] x86/Swiotlb/HV: Add Swiotlb bounce buffer remap function for HV IVM Tianyu Lan
2021-07-07 15:34   ` Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 09/12] HV/IOMMU: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-07-07 15:34   ` Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 10/12] HV/Netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-07-07 15:34   ` Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 11/12] HV/Storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-07-07 15:34   ` Tianyu Lan
2021-07-07 15:34 ` Tianyu Lan [this message]
2021-07-07 15:34   ` [RFC PATCH V4 12/12] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM Tianyu Lan

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