From: Hirokazu Honda <hiroh@chromium.org>
To: jens.wiklander@linaro.org
Cc: sumit.garg@kernel.org, op-tee@lists.trustedfirmware.org,
linux-kernel@vger.kernel.org, hiroh@chromium.org
Subject: [PATCH] tee: optee: Allow MT_NORMAL_TAGGED shared memory
Date: Thu, 16 Apr 2026 15:18:19 -0700 [thread overview]
Message-ID: <20260416221819.3600289-1-hiroh@google.com> (raw)
From: Hirokazu Honda <hiroh@chromium.org>
On ARM64, shared memory can have MT_NORMAL_TAGGED attribute when using
the Memory Tagging Extension (MTE). The OP-TEE driver needs to
recognize this as normal memory to allow sharing such buffers with the
Secure World.
Signed-off-by: Hirokazu Honda <hiroh@chromium.org>
---
drivers/tee/optee/call.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
index 9effe88049e9..e046aff61828 100644
--- a/drivers/tee/optee/call.c
+++ b/drivers/tee/optee/call.c
@@ -602,7 +602,8 @@ static bool is_normal_memory(pgprot_t p)
return (((pgprot_val(p) & L_PTE_MT_MASK) == L_PTE_MT_WRITEALLOC) ||
((pgprot_val(p) & L_PTE_MT_MASK) == L_PTE_MT_WRITEBACK));
#elif defined(CONFIG_ARM64)
- return (pgprot_val(p) & PTE_ATTRINDX_MASK) == PTE_ATTRINDX(MT_NORMAL);
+ return ((pgprot_val(p) & PTE_ATTRINDX_MASK) == PTE_ATTRINDX(MT_NORMAL)) ||
+ ((pgprot_val(p) & PTE_ATTRINDX_MASK) == PTE_ATTRINDX(MT_NORMAL_TAGGED));
#else
#error "Unsupported architecture"
#endif
--
2.54.0.rc1.513.gad8abe7a5a-goog
reply other threads:[~2026-04-16 22:18 UTC|newest]
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