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[PULL,3/9] target/arm: Record tagged bit for user-only in sve_probe_page

Message ID 20220707122734.288929-4-peter.maydell@linaro.org
State Accepted
Commit 95047cdeb3d6cb8e4e2fecc82994afbb51b3352e
Headers show
Series [PULL,1/9] hw/arm/virt: dt: add rng-seed property | expand

Commit Message

Peter Maydell July 7, 2022, 12:27 p.m. UTC 
From: Richard Henderson <richard.henderson@linaro.org>

Fixes a bug in that we were not honoring MTE from user-only
SVE. Copy the user-only MTE logic from allocation_tag_mem
into sve_probe_page.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/sve_helper.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index db15d03ded8..0c6379e6e80 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -5337,6 +5337,9 @@  bool sve_probe_page(SVEHostPage *info, bool nofault, CPUARMState *env,
 
 #ifdef CONFIG_USER_ONLY
     memset(&info->attrs, 0, sizeof(info->attrs));
+    /* Require both MAP_ANON and PROT_MTE -- see allocation_tag_mem. */
+    arm_tlb_mte_tagged(&info->attrs) =
+        (flags & PAGE_ANON) && (flags & PAGE_MTE);
 #else
     /*
      * Find the iotlbentry for addr and return the transaction attributes.