From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56305) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xm9vO-00045I-P9 for qemu-devel@nongnu.org; Wed, 05 Nov 2014 18:23:44 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Xm9vI-0004cC-E1 for qemu-devel@nongnu.org; Wed, 05 Nov 2014 18:23:38 -0500 Received: from mail-pd0-f179.google.com ([209.85.192.179]:41614) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xm9vI-0004c3-6m for qemu-devel@nongnu.org; Wed, 05 Nov 2014 18:23:32 -0500 Received: by mail-pd0-f179.google.com with SMTP id g10so1680250pdj.38 for ; Wed, 05 Nov 2014 15:23:31 -0800 (PST) From: Greg Bellows Date: Wed, 5 Nov 2014 17:22:54 -0600 Message-Id: <1415229793-3278-8-git-send-email-greg.bellows@linaro.org> In-Reply-To: <1415229793-3278-1-git-send-email-greg.bellows@linaro.org> References: <1415229793-3278-1-git-send-email-greg.bellows@linaro.org> Subject: [Qemu-devel] [PATCH v9 07/26] target-arm: insert AArch32 cpregs twice into hashtable List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, serge.fdrv@gmail.com, edgar.iglesias@gmail.com, aggelerf@ethz.ch, peter.maydell@linaro.org Cc: greg.bellows@linaro.org From: Fabian Aggeler Prepare for cp register banking by inserting every cp register twice, once for secure world and once for non-secure world. Signed-off-by: Fabian Aggeler Signed-off-by: Greg Bellows --- v8 -> v9 - Fixed setting of secure field in add_cpreg_to_hashtable so it uses secstate and happens in all cases. - Fixed check for disabling of migration to only occur on duplicately defined reginfos. - Fixed comment on disabling migration and reset and eliminated crn special case. - Reworked define_one_arm_cp_reg_with_opaque() secure case handling. v7 -> v8 - Updated define registers asserts to allow either a non-zero fieldoffset or non-zero bank_fieldoffsets. - Updated CP register hashing to always set the register fieldoffset when banked register offsets are specified. v5 -> v6 - Fixed NS-bit number in the CPREG hash lookup from 27 to 29. - Switched to dedicated CPREG secure flags. - Fixed disablement of reset and migration of common 32/64-bit registers. - Globally replace Aarch# with AArch# v4 -> v5 - Added use of ARM CP secure/non-secure bank flags during register processing in define_one_arm_cp_reg_with_opaque(). We now only register the specified bank if only one flag is specified, otherwise we register both a secure and non-secure instance. --- target-arm/helper.c | 98 +++++++++++++++++++++++++++++++++++++++++++---------- 1 file changed, 81 insertions(+), 17 deletions(-) diff --git a/target-arm/helper.c b/target-arm/helper.c index 1aadb79..0471e6c 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -3296,23 +3296,59 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r, uint32_t *key = g_new(uint32_t, 1); ARMCPRegInfo *r2 = g_memdup(r, sizeof(ARMCPRegInfo)); int is64 = (r->type & ARM_CP_64BIT) ? 1 : 0; - int ns = (r->secure & ARM_CP_SECSTATE_NS) ? 1 : 0; - if (r->state == ARM_CP_STATE_BOTH && state == ARM_CP_STATE_AA32) { - /* The AArch32 view of a shared register sees the lower 32 bits - * of a 64 bit backing field. It is not migratable as the AArch64 - * view handles that. AArch64 also handles reset. - * We assume it is a cp15 register if the .cp field is left unset. + int ns = (secstate & ARM_CP_SECSTATE_NS) ? 1 : 0; + + /* Reset the secure state to the specific incoming state. This is + * necessary as the register may have been defined with both states. + */ + r2->secure = secstate; + + if (r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1]) { + /* Register is banked (using both entries in array). + * Overwriting fieldoffset as the array is only used to define + * banked registers but later only fieldoffset is used. */ - if (r2->cp == 0) { - r2->cp = 15; + r2->fieldoffset = r->bank_fieldoffsets[ns]; + } + + if (state == ARM_CP_STATE_AA32) { + if (r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1]) { + /* If the register is banked then we don't need to migrate or + * reset the 32-bit instance in certain cases: + * + * 1) If the register has both 32-bit and 64-bit instances then we + * can count on the 64-bit instance taking care of the + * non-secure bank. + * 2) If ARMv8 is enabled then we can count on a 64-bit version + * taking care of the secure bank. This requires that separate + * 32 and 64-bit definitions are provided. + */ + if ((r->state == ARM_CP_STATE_BOTH && ns) || + (arm_feature(&cpu->env, ARM_FEATURE_V8) && !ns)) { + r2->type |= ARM_CP_NO_MIGRATE; + r2->resetfn = arm_cp_reset_ignore; + } + } else if ((secstate != r->secure) && !ns) { + /* The register is not banked so we only want to allow migration of + * the non-secure instance. + */ + r2->type |= ARM_CP_NO_MIGRATE; + r2->resetfn = arm_cp_reset_ignore; } - r2->type |= ARM_CP_NO_MIGRATE; - r2->resetfn = arm_cp_reset_ignore; + + if (r->state == ARM_CP_STATE_BOTH) { + /* We assume it is a cp15 register if the .cp field is left unset. + */ + if (r2->cp == 0) { + r2->cp = 15; + } + #ifdef HOST_WORDS_BIGENDIAN - if (r2->fieldoffset) { - r2->fieldoffset += sizeof(uint32_t); - } + if (r2->fieldoffset) { + r2->fieldoffset += sizeof(uint32_t); + } #endif + } } if (state == ARM_CP_STATE_AA64) { /* To allow abbreviation of ARMCPRegInfo @@ -3461,10 +3497,14 @@ void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu, */ if (!(r->type & (ARM_CP_SPECIAL|ARM_CP_CONST))) { if (r->access & PL3_R) { - assert(r->fieldoffset || r->readfn); + assert((r->fieldoffset || + (r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1])) || + r->readfn); } if (r->access & PL3_W) { - assert(r->fieldoffset || r->writefn); + assert((r->fieldoffset || + (r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1])) || + r->writefn); } } /* Bad type field probably means missing sentinel at end of reg list */ @@ -3477,8 +3517,32 @@ void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu, if (r->state != state && r->state != ARM_CP_STATE_BOTH) { continue; } - add_cpreg_to_hashtable(cpu, r, opaque, state, - ARM_CP_SECSTATE_NS, crm, opc1, opc2); + if (state == ARM_CP_STATE_AA32) { + /* Under AArch32 CP registers can be common + * (same for secure and non-secure world) or banked. + */ + switch (r->secure) { + case ARM_CP_SECSTATE_S: + case ARM_CP_SECSTATE_NS: + add_cpreg_to_hashtable(cpu, r, opaque, state, + r->secure, crm, opc1, opc2); + break; + default: + add_cpreg_to_hashtable(cpu, r, opaque, state, + ARM_CP_SECSTATE_S, + crm, opc1, opc2); + add_cpreg_to_hashtable(cpu, r, opaque, state, + ARM_CP_SECSTATE_NS, + crm, opc1, opc2); + break; + } + } else { + /* AArch64 registers get mapped to non-secure instance + * of AArch32 */ + add_cpreg_to_hashtable(cpu, r, opaque, state, + ARM_CP_SECSTATE_NS, + crm, opc1, opc2); + } } } } -- 1.8.3.2