[Resend RFC PATCH V4 13/13] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM
From: Tianyu Lan <hidden>
Date: 2021-07-07 15:47:58
Also in:
linux-arch, linux-hyperv, linux-iommu, lkml, netdev, xen-devel
Subsystem:
the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
From: Tianyu Lan <redacted> 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 <redacted> --- 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; /*
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2.25.1