diff mbox series

[RFC,V4,12/12] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM

Message ID 20210707153456.3976348-13-ltykernel@gmail.com
State New
Headers show
Series x86/Hyper-V: Add Hyper-V Isolation VM support | expand

Commit Message

Tianyu Lan July 7, 2021, 3:34 p.m. UTC 
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 mbox series

Patch

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;
 
 	/*