Re: [RFC PATCH V3 03/11] x86/Hyper-V: Add new hvcall guest address host visibility support
From: Borislav Petkov <bp@alien8.de>
Date: 2021-05-30 18:26:23
Also in:
linux-arch, linux-hyperv, linux-iommu, linux-scsi, lkml, xen-devel
On Sun, May 30, 2021 at 11:06:20AM -0400, Tianyu Lan wrote:
quoted hunk ↗ jump to hunk
diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c index 156cd235659f..a82975600107 100644 --- a/arch/x86/mm/pat/set_memory.c +++ b/arch/x86/mm/pat/set_memory.c@@ -29,6 +29,8 @@ #include <asm/proto.h> #include <asm/memtype.h> #include <asm/set_memory.h> +#include <asm/hyperv-tlfs.h> +#include <asm/mshyperv.h> #include "../mm_internal.h"@@ -1986,8 +1988,14 @@ static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc) int ret; /* Nothing to do if memory encryption is not active */ - if (!mem_encrypt_active()) + if (hv_is_isolation_supported()) { + return hv_set_mem_host_visibility((void *)addr, + numpages * HV_HYP_PAGE_SIZE, + enc ? VMBUS_PAGE_NOT_VISIBLE + : VMBUS_PAGE_VISIBLE_READ_WRITE);
Put all this gunk in a hv-specific function somewhere in hv-land which
you only call from here. This way you probably won't even need to export
hv_set_mem_host_visibility() and so on...
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette