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[2001:44b8:2176:c800:8cc6:2630:7d99:5ef1]) by smtp.gmail.com with ESMTPSA id w128sm100686177pfw.79.2019.01.08.14.32.38 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 08 Jan 2019 14:32:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=01IO6/Fjvs90ItdmEEqL8n0fmAXQds5N0LRFVoEcyAc=; b=H2LfJaneF5DOwovLhZn4aPomZxKe+nds1fXmoL0ADWQbBLRPYtdL5NrxE/Rv7CCj2v IczOKLU/thgB1aj0L4PNvIqQrrnKu0i8720ESIrS/W6/4idfpt/7vNXE1W/PL+JlB8kt 1PUTifBFrjs33fFQb3mEYWwLpNRIdoR9TWLxU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=01IO6/Fjvs90ItdmEEqL8n0fmAXQds5N0LRFVoEcyAc=; b=Te1KFjx1txZ0mZLs/JpF6OTbU2Z41z+z2DlePMKK2ngVZ84V+NhADN9sSGaV/xkjBI Ii5FEKwEPXJ+03lSMSCXrvZQGY1oTp016WipT/ClJ8+lFGAEX62HAeNPQNWuySF5eStX iC+jgbZbnBHSYposjtMSDpEd5FIJPRW6/oEz+nC9mjncgcG2Fxqtxh7YmjROEGk66nnh qEh1aXK3q/G6dT4OTR114/v4vSe9MLQvXmYTbpJwUu2KvBS9+YE7HK911H9n9Tbf0KLg UM0MRJhVcDSyVaiMnrrnEKUBxxG16KlzcwSqrSEYOf9BJQkG1td/dkGuWrwan/cOkVGi T86w== X-Gm-Message-State: AJcUukfkHom/abEIlMUteCIagYtrPx9jLcllzVwIcLacggFEF5Ibv1YT pC9D7sc6uUy8YQa7apY4px7z6ZvlpUg= X-Google-Smtp-Source: ALg8bN7+MZfqABGjw9auYE+6pWcYlGb2ST1RdgvElTASv102Wtfa5bcXtcNoBTWs99xz/SImeX9Aqg== X-Received: by 2002:a63:580a:: with SMTP id m10mr3111075pgb.332.1546986761167; Tue, 08 Jan 2019 14:32:41 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Date: Wed, 9 Jan 2019 08:31:23 +1000 Message-Id: <20190108223129.5570-26-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20190108223129.5570-1-richard.henderson@linaro.org> References: <20190108223129.5570-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::544 Subject: [Qemu-devel] [PATCH v3 25/31] target/arm: Implement pauth_auth X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" This is not really functional yet, because the crypto is not yet implemented. This, however follows the Auth pseudo function. Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- target/arm/pauth_helper.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/target/arm/pauth_helper.c b/target/arm/pauth_helper.c index e02376a2d0..fa7707e0bf 100644 --- a/target/arm/pauth_helper.c +++ b/target/arm/pauth_helper.c @@ -50,7 +50,26 @@ static uint64_t pauth_original_ptr(uint64_t ptr, ARMVAPa= rameters param) static uint64_t pauth_auth(CPUARMState *env, uint64_t ptr, uint64_t modifi= er, ARMPACKey *key, bool data, int keynumber) { - g_assert_not_reached(); /* FIXME */ + ARMMMUIdx mmu_idx =3D arm_stage1_mmu_idx(env); + ARMVAParameters param =3D aa64_va_parameters(env, ptr, mmu_idx, data); + int bot_bit, top_bit; + uint64_t pac, orig_ptr, test; + + orig_ptr =3D pauth_original_ptr(ptr, param); + pac =3D pauth_computepac(orig_ptr, modifier, *key); + bot_bit =3D 64 - param.tsz; + top_bit =3D 64 - 8 * param.tbi; + + test =3D (pac ^ ptr) & ~MAKE_64BIT_MASK(55, 1); + if (unlikely(extract64(test, bot_bit, top_bit - bot_bit))) { + int error_code =3D (keynumber << 1) | (keynumber ^ 1); + if (param.tbi) { + return deposit64(ptr, 53, 2, error_code); + } else { + return deposit64(ptr, 61, 2, error_code); + } + } + return orig_ptr; } =20 static uint64_t pauth_strip(CPUARMState *env, uint64_t ptr, bool data) --=20 2.17.2