From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org
Cc: "H . Peter Anvin" <hpa@zytor.com>,
Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@linux.intel.com>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
Tony Luck <tony.luck@intel.com>, Andi Kleen <ak@linux.intel.com>,
Kai Huang <kai.huang@intel.com>,
Wander Lairson Costa <wander@redhat.com>,
Isaku Yamahata <isaku.yamahata@gmail.com>,
marcelo.cerri@canonical.com, tim.gardner@canonical.com,
khalid.elmously@canonical.com, philip.cox@canonical.com,
linux-kernel@vger.kernel.org
Subject: [PATCH v6 3/5] x86/mm: Make tdx_enc_status_changed() vmalloc address compatible
Date: Thu, 12 May 2022 15:19:50 -0700 [thread overview]
Message-ID: <20220512221952.3647598-4-sathyanarayanan.kuppuswamy@linux.intel.com> (raw)
In-Reply-To: <20220512221952.3647598-1-sathyanarayanan.kuppuswamy@linux.intel.com>
set_memory_*crypted() APIs are used to change encryption or decryption
page attributes for the given address. It also supports conversion for
the vmalloc'ed memory.
In TDX Guest, tdx_enc_status_changed() function is triggered by
set_memory_*crypted() APIs when converting memory from/to shared or
private. Internally this function uses __pa() for physical address
conversion, which breaks the vmalloc address compatibility of the
set_memory_*crypted() API.
So add support to fix the vmalloc'ed address compatibility issue.
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
---
arch/x86/coco/tdx/tdx.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/arch/x86/coco/tdx/tdx.c b/arch/x86/coco/tdx/tdx.c
index b49211994864..37d58675ccf1 100644
--- a/arch/x86/coco/tdx/tdx.c
+++ b/arch/x86/coco/tdx/tdx.c
@@ -15,6 +15,7 @@
#include <asm/idtentry.h>
#include <asm/irq_regs.h>
#include <asm/desc.h>
+#include <asm/io.h>
/* TDX module Call Leaf IDs */
#define TDX_GET_INFO 1
@@ -680,8 +681,14 @@ static bool try_accept_one(phys_addr_t *start, unsigned long len,
*/
static bool tdx_enc_status_changed(unsigned long vaddr, int numpages, bool enc)
{
- phys_addr_t start = __pa(vaddr);
- phys_addr_t end = __pa(vaddr + numpages * PAGE_SIZE);
+ phys_addr_t start, end;
+
+ if (is_vmalloc_addr((void *)vaddr))
+ start = vmalloc_to_pfn((void *) vaddr) << PAGE_SHIFT;
+ else
+ start = __pa(vaddr);
+
+ end = start + numpages * PAGE_SIZE;
if (!enc) {
/* Set the shared (decrypted) bits: */
--
2.25.1
next prev parent reply other threads:[~2022-05-12 22:20 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-12 22:19 [PATCH v6 0/5] Add TDX Guest Attestation support Kuppuswamy Sathyanarayanan
2022-05-12 22:19 ` [PATCH v6 1/5] x86/tdx: Add TDX Guest attestation interface driver Kuppuswamy Sathyanarayanan
2022-05-16 18:08 ` Wander Lairson Costa
2022-05-16 21:06 ` Sathyanarayanan Kuppuswamy
2022-05-17 2:54 ` Kai Huang
2022-05-17 14:54 ` Sathyanarayanan Kuppuswamy
2022-05-23 2:52 ` Kai Huang
2022-05-23 3:41 ` Sathyanarayanan Kuppuswamy
2022-05-12 22:19 ` [PATCH v6 2/5] x86/tdx: Add TDX Guest event notify interrupt support Kuppuswamy Sathyanarayanan
2022-05-12 22:19 ` Kuppuswamy Sathyanarayanan [this message]
2022-05-12 22:19 ` [PATCH v6 4/5] x86/mm: Add noalias variants of set_memory_*crypted() functions Kuppuswamy Sathyanarayanan
2022-05-12 22:19 ` [PATCH v6 5/5] x86/tdx: Add Quote generation support Kuppuswamy Sathyanarayanan
2022-05-13 18:58 ` Isaku Yamahata
2022-05-13 19:29 ` Sathyanarayanan Kuppuswamy
2022-05-17 2:58 ` Kai Huang
2022-05-17 20:08 ` Sathyanarayanan Kuppuswamy
2022-05-17 23:06 ` Kai Huang
2022-05-17 23:32 ` Sathyanarayanan Kuppuswamy
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220512221952.3647598-4-sathyanarayanan.kuppuswamy@linux.intel.com \
--to=sathyanarayanan.kuppuswamy@linux.intel.com \
--cc=ak@linux.intel.com \
--cc=bp@alien8.de \
--cc=dave.hansen@linux.intel.com \
--cc=hpa@zytor.com \
--cc=isaku.yamahata@gmail.com \
--cc=kai.huang@intel.com \
--cc=khalid.elmously@canonical.com \
--cc=kirill.shutemov@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=marcelo.cerri@canonical.com \
--cc=mingo@redhat.com \
--cc=philip.cox@canonical.com \
--cc=tglx@linutronix.de \
--cc=tim.gardner@canonical.com \
--cc=tony.luck@intel.com \
--cc=wander@redhat.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).