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,
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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,
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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
prev parent reply other threads:[~2021-07-07 15:35 UTC|newest]
Thread overview: 15+ 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 ` [RFC PATCH V4 01/12] x86/HV: Initialize shared memory boundary in the Isolation VM Tianyu Lan
2021-07-08 7:34 ` Olaf Hering
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 ` [RFC PATCH V4 03/12] HV: Mark vmbus ring buffer visible to host in Isolation VM 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 ` [RFC PATCH V4 05/12] HV: Add ghcb hvcall support for SNP VM 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 ` [RFC PATCH V4 07/12] HV/Vmbus: Initialize VMbus ring buffer for Isolation VM 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 ` [RFC PATCH V4 09/12] HV/IOMMU: Enable swiotlb bounce buffer for Isolation VM 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 ` [RFC PATCH V4 11/12] HV/Storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-07-07 15:34 ` Tianyu Lan [this message]
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