From 16c849784873d10d0da257d698e391fddea1f0e4 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Fri, 12 Feb 2021 10:48:53 -0800 Subject: target/arm: Use the proper TBI settings for linux-user We were fudging TBI1 enabled to speed up the generated code. Now that we've improved the code generation, remove this. Also, tidy the comment to reflect the current code. The pauth test was testing a kernel address (-1) and making incorrect assumptions about TBI1; stick to userland addresses. Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson Message-id: 20210212184902.1251044-23-richard.henderson@linaro.org Signed-off-by: Peter Maydell --- target/arm/cpu.c | 10 +++------- target/arm/internals.h | 4 ++-- 2 files changed, 5 insertions(+), 9 deletions(-) (limited to 'target/arm') diff --git a/target/arm/cpu.c b/target/arm/cpu.c index 5cf6c05..70cfcbc 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -205,14 +205,10 @@ static void arm_cpu_reset(DeviceState *dev) env->vfp.zcr_el[1] = MIN(cpu->sve_max_vq - 1, 3); } /* - * Enable TBI0 and TBI1. While the real kernel only enables TBI0, - * turning on both here will produce smaller code and otherwise - * make no difference to the user-level emulation. - * - * In sve_probe_page, we assume that this is set. - * Do not modify this without other changes. + * Enable TBI0 but not TBI1. + * Note that this must match useronly_clean_ptr. */ - env->cp15.tcr_el[1].raw_tcr = (3ULL << 37); + env->cp15.tcr_el[1].raw_tcr = (1ULL << 37); #else /* Reset into the highest available EL */ if (arm_feature(env, ARM_FEATURE_EL3)) { diff --git a/target/arm/internals.h b/target/arm/internals.h index b251fe4..112bbb1 100644 --- a/target/arm/internals.h +++ b/target/arm/internals.h @@ -1425,9 +1425,9 @@ static inline bool tcma_check(uint32_t desc, int bit55, int ptr_tag) */ static inline uint64_t useronly_clean_ptr(uint64_t ptr) { - /* TBI is known to be enabled. */ #ifdef CONFIG_USER_ONLY - ptr = sextract64(ptr, 0, 56); + /* TBI0 is known to be enabled, while TBI1 is disabled. */ + ptr &= sextract64(ptr, 0, 56); #endif return ptr; } -- cgit v1.1