From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 22 Apr 2024 10:07:22 -0700 Subject: [PATCH] target/arm: Restrict translation disabled alignment check to VMSA MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit For cpus using PMSA, when the MPU is disabled, the default memory type is Normal, Non-cachable. This means that it should not have alignment restrictions enforced. Cc: qemu-stable@nongnu.org Fixes: 59754f85ed3 ("target/arm: Do memory type alignment check when translation disabled") Reported-by: Clément Chigot Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Tested-by: Clément Chigot Message-id: 20240422170722.117409-1-richard.henderson@linaro.org [PMM: trivial comment, commit message tweaks] Signed-off-by: Peter Maydell (cherry picked from commit 7b19a3554d2df22d29c75319a1dac17615d1b20e) Signed-off-by: Fiona Ebner --- target/arm/tcg/hflags.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/target/arm/tcg/hflags.c b/target/arm/tcg/hflags.c index 5da1b0fc1d..f03977b4b0 100644 --- a/target/arm/tcg/hflags.c +++ b/target/arm/tcg/hflags.c @@ -38,8 +38,16 @@ static bool aprofile_require_alignment(CPUARMState *env, int el, uint64_t sctlr) } /* - * If translation is disabled, then the default memory type is - * Device(-nGnRnE) instead of Normal, which requires that alignment + * With PMSA, when the MPU is disabled, all memory types in the + * default map are Normal, so don't need aligment enforcing. + */ + if (arm_feature(env, ARM_FEATURE_PMSA)) { + return false; + } + + /* + * With VMSA, if translation is disabled, then the default memory type + * is Device(-nGnRnE) instead of Normal, which requires that alignment * be enforced. Since this affects all ram, it is most efficient * to handle this during translation. */