From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42410) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gTuzb-000687-5q for qemu-devel@nongnu.org; Mon, 03 Dec 2018 15:39:00 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gTuza-0005sz-7V for qemu-devel@nongnu.org; Mon, 03 Dec 2018 15:38:59 -0500 Received: from mail-oi1-x242.google.com ([2607:f8b0:4864:20::242]:37154) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gTuza-0005sF-2t for qemu-devel@nongnu.org; Mon, 03 Dec 2018 15:38:58 -0500 Received: by mail-oi1-x242.google.com with SMTP id y23so12231279oia.4 for ; Mon, 03 Dec 2018 12:38:58 -0800 (PST) From: Richard Henderson Date: Mon, 3 Dec 2018 14:38:38 -0600 Message-Id: <20181203203839.757-10-richard.henderson@linaro.org> In-Reply-To: <20181203203839.757-1-richard.henderson@linaro.org> References: <20181203203839.757-1-richard.henderson@linaro.org> Subject: [Qemu-devel] [PATCH v2 09/10] target/arm: Implement the ARMv8.1-HPD extension List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org Since the TCR_*.HPD bits were RES0 in ARMv8.0, we can simply interpret the bits as if ARMv8.1-HPD is present without checking. We will need a slightly different check for hpd for aarch32. Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- target/arm/cpu64.c | 1 + target/arm/helper.c | 27 ++++++++++++++++++++------- 2 files changed, 21 insertions(+), 7 deletions(-) diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c index aac6283018..1d57be0c91 100644 --- a/target/arm/cpu64.c +++ b/target/arm/cpu64.c @@ -325,6 +325,7 @@ static void aarch64_max_initfn(Object *obj) cpu->isar.id_aa64pfr0 = t; t = cpu->isar.id_aa64mmfr1; + t = FIELD_DP64(t, ID_AA64MMFR1, HPDS, 1); /* HPD */ t = FIELD_DP64(t, ID_AA64MMFR1, LO, 1); cpu->isar.id_aa64mmfr1 = t; diff --git a/target/arm/helper.c b/target/arm/helper.c index a0ee1fbc5a..9bb3e364d4 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -9776,6 +9776,7 @@ static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address, bool ttbr1_valid = true; uint64_t descaddrmask; bool aarch64 = arm_el_is_aa64(env, el); + bool hpd = false; /* TODO: * This code does not handle the different format TCR for VTCR_EL2. @@ -9890,6 +9891,13 @@ static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address, if (tg == 2) { /* 16KB pages */ stride = 11; } + if (aarch64) { + if (el > 1) { + hpd = extract64(tcr->raw_tcr, 24, 1); + } else { + hpd = extract64(tcr->raw_tcr, 41, 1); + } + } } else { /* We should only be here if TTBR1 is valid */ assert(ttbr1_valid); @@ -9905,6 +9913,9 @@ static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address, if (tg == 1) { /* 16KB pages */ stride = 11; } + if (aarch64) { + hpd = extract64(tcr->raw_tcr, 42, 1); + } } /* Here we should have set up all the parameters for the translation: @@ -9998,7 +10009,7 @@ static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address, descaddr = descriptor & descaddrmask; if ((descriptor & 2) && (level < 3)) { - /* Table entry. The top five bits are attributes which may + /* Table entry. The top five bits are attributes which may * propagate down through lower levels of the table (and * which are all arranged so that 0 means "no effect", so * we can gather them up by ORing in the bits at each level). @@ -10023,15 +10034,17 @@ static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address, break; } /* Merge in attributes from table descriptors */ - attrs |= extract32(tableattrs, 0, 2) << 11; /* XN, PXN */ - attrs |= extract32(tableattrs, 3, 1) << 5; /* APTable[1] => AP[2] */ + attrs |= nstable << 3; /* NS */ + if (hpd) { + /* HPD disables all the table attributes except NSTable. */ + break; + } + attrs |= extract32(tableattrs, 0, 2) << 11; /* XN, PXN */ /* The sense of AP[1] vs APTable[0] is reversed, as APTable[0] == 1 * means "force PL1 access only", which means forcing AP[1] to 0. */ - if (extract32(tableattrs, 2, 1)) { - attrs &= ~(1 << 4); - } - attrs |= nstable << 3; /* NS */ + attrs &= ~(extract32(tableattrs, 2, 1) << 4); /* !APT[0] => AP[1] */ + attrs |= extract32(tableattrs, 3, 1) << 5; /* APT[1] => AP[2] */ break; } /* Here descaddr is the final physical address, and attributes -- 2.17.2