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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,
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	m.szyprowski@samsung.com, robin.murphy@arm.com,
	kirill.shutemov@linux.intel.com, akpm@linux-foundation.org,
	rppt@kernel.org, Tianyu.Lan@microsoft.com,
	thomas.lendacky@amd.com, ardb@kernel.org, robh@kernel.org,
	nramas@linux.microsoft.com, pgonda@google.com,
	martin.b.radev@gmail.com, david@redhat.com,
	krish.sadhukhan@oracle.com, saravanand@fb.com,
	xen-devel@lists.xenproject.org, keescook@chromium.org,
	rientjes@google.com, hannes@cmpxchg.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: [Resend RFC PATCH V4 13/13] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM
Date: Wed,  7 Jul 2021 11:46:27 -0400	[thread overview]
Message-ID: <20210707154629.3977369-14-ltykernel@gmail.com> (raw)
In-Reply-To: <20210707154629.3977369-1-ltykernel@gmail.com>

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

Hyper-V Isolation VM reuses set_memory_decrypted/encrypted function
and not needs to decrypted/encrypted 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,
	kirill.shutemov@linux.intel.com, akpm@linux-foundation.org,
	rppt@kernel.org, Tianyu.Lan@microsoft.com,
	thomas.lendacky@amd.com, ardb@kernel.org, robh@kernel.org,
	nramas@linux.microsoft.com, pgonda@google.com,
	martin.b.radev@gmail.com, david@redhat.com,
	krish.sadhukhan@oracle.com, saravanand@fb.com,
	xen-devel@lists.xenproject.org, keescook@chromium.org,
	rientjes@google.com, hannes@cmpxchg.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: [Resend RFC PATCH V4 13/13] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM
Date: Wed,  7 Jul 2021 11:46:27 -0400	[thread overview]
Message-ID: <20210707154629.3977369-14-ltykernel@gmail.com> (raw)
In-Reply-To: <20210707154629.3977369-1-ltykernel@gmail.com>

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

Hyper-V Isolation VM reuses set_memory_decrypted/encrypted function
and not needs to decrypted/encrypted 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
https://lists.linuxfoundation.org/mailman/listinfo/iommu

  parent reply	other threads:[~2021-07-07 15:47 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-07 15:46 [Resend RFC PATCH V4 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Tianyu Lan
2021-07-07 15:46 ` Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 01/13] x86/HV: Initialize GHCB page in Isolation VM Tianyu Lan
2021-07-07 15:46   ` Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 02/13] x86/HV: Initialize shared memory boundary in the " Tianyu Lan
2021-07-07 15:46   ` Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 03/13] x86/HV: Add new hvcall guest address host visibility support Tianyu Lan
2021-07-07 15:46   ` Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 04/13] HV: Mark vmbus ring buffer visible to host in Isolation VM Tianyu Lan
2021-07-07 15:46   ` Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 05/13] HV: Add Write/Read MSR registers via ghcb page Tianyu Lan
2021-07-07 15:46   ` Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 06/13] HV: Add ghcb hvcall support for SNP VM Tianyu Lan
2021-07-07 15:46   ` Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 07/13] HV/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan
2021-07-07 15:46   ` Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 08/13] HV/Vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan
2021-07-07 15:46   ` Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 09/13] x86/Swiotlb/HV: Add Swiotlb bounce buffer remap function for HV IVM Tianyu Lan
2021-07-07 15:46   ` Tianyu Lan
2021-07-20 10:42   ` Tianyu Lan
2021-07-20 10:42     ` Tianyu Lan
2021-07-20 13:54   ` Christoph Hellwig
2021-07-20 13:54     ` Christoph Hellwig
2021-07-21 10:28     ` Tianyu Lan
2021-07-21 10:28       ` Tianyu Lan
2021-07-21 14:33       ` Christoph Hellwig
2021-07-21 14:33         ` Christoph Hellwig
2021-07-21 15:11         ` Tianyu Lan
2021-07-21 15:11           ` Tianyu Lan
2021-08-13 16:43     ` Tianyu Lan
2021-08-13 16:43       ` Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 10/13] HV/IOMMU: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-07-07 15:46   ` Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 11/13] HV/Netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-07-07 15:46   ` Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 12/13] HV/Storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-07-07 15:46   ` Tianyu Lan
2021-07-07 15:46 ` Tianyu Lan [this message]
2021-07-07 15:46   ` [Resend RFC PATCH V4 13/13] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM Tianyu Lan
2021-07-07 16:14   ` Dave Hansen
2021-07-07 16:14     ` Dave Hansen
2021-07-08 13:54     ` Tianyu Lan
2021-07-08 13:54       ` Tianyu Lan

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