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[71.212.39.66]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7326a38ff76sm4347164b3a.160.2025.02.17.11.30.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Feb 2025 11:30:31 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Cc: Artyom Tarasenko Subject: [PULL v2 25/27] target/sparc: fake UltraSPARC T1 PCR and PIC registers Date: Mon, 17 Feb 2025 11:30:06 -0800 Message-ID: <20250217193009.2873875-26-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250217193009.2873875-1-richard.henderson@linaro.org> References: <20250217193009.2873875-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::631; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x631.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Artyom Tarasenko Fake access to PCR Performance Control Register and PIC Performance Instrumentation Counter. Ignore writes in privileged mode, and return 0 on reads. This allows booting Tribblix, MilaX and v9os under Niagara target. Signed-off-by: Artyom Tarasenko Reviewed-by: Richard Henderson Signed-off-by: Richard Henderson Message-ID: <20250209211248.50383-1-atar4qemu@gmail.com> --- target/sparc/translate.c | 19 +++++++++++++++++++ target/sparc/insns.decode | 7 ++++++- 2 files changed, 25 insertions(+), 1 deletion(-) diff --git a/target/sparc/translate.c b/target/sparc/translate.c index 7e5c7351cb..bfe63649db 100644 --- a/target/sparc/translate.c +++ b/target/sparc/translate.c @@ -2882,6 +2882,14 @@ static TCGv do_rd_leon3_config(DisasContext *dc, TCGv dst) TRANS(RDASR17, ASR17, do_rd_special, true, a->rd, do_rd_leon3_config) +static TCGv do_rdpic(DisasContext *dc, TCGv dst) +{ + return tcg_constant_tl(0); +} + +TRANS(RDPIC, HYPV, do_rd_special, supervisor(dc), a->rd, do_rdpic) + + static TCGv do_rdccr(DisasContext *dc, TCGv dst) { gen_helper_rdccr(dst, tcg_env); @@ -3315,6 +3323,17 @@ static void do_wrfprs(DisasContext *dc, TCGv src) TRANS(WRFPRS, 64, do_wr_special, a, true, do_wrfprs) +static bool do_priv_nop(DisasContext *dc, bool priv) +{ + if (!priv) { + return raise_priv(dc); + } + return advance_pc(dc); +} + +TRANS(WRPCR, HYPV, do_priv_nop, supervisor(dc)) +TRANS(WRPIC, HYPV, do_priv_nop, supervisor(dc)) + static void do_wrgsr(DisasContext *dc, TCGv src) { gen_trap_ifnofpu(dc); diff --git a/target/sparc/insns.decode b/target/sparc/insns.decode index cfcdf6690e..9e39d23273 100644 --- a/target/sparc/insns.decode +++ b/target/sparc/insns.decode @@ -96,7 +96,10 @@ CALL 01 i:s30 RDTICK 10 rd:5 101000 00100 0 0000000000000 RDPC 10 rd:5 101000 00101 0 0000000000000 RDFPRS 10 rd:5 101000 00110 0 0000000000000 - RDASR17 10 rd:5 101000 10001 0 0000000000000 + { + RDASR17 10 rd:5 101000 10001 0 0000000000000 + RDPIC 10 rd:5 101000 10001 0 0000000000000 + } RDGSR 10 rd:5 101000 10011 0 0000000000000 RDSOFTINT 10 rd:5 101000 10110 0 0000000000000 RDTICK_CMPR 10 rd:5 101000 10111 0 0000000000000 @@ -114,6 +117,8 @@ CALL 01 i:s30 WRCCR 10 00010 110000 ..... . ............. @n_r_ri WRASI 10 00011 110000 ..... . ............. @n_r_ri WRFPRS 10 00110 110000 ..... . ............. @n_r_ri + WRPCR 10 10000 110000 01000 0 0000000000000 + WRPIC 10 10001 110000 01000 0 0000000000000 { WRGSR 10 10011 110000 ..... . ............. @n_r_ri WRPOWERDOWN 10 10011 110000 ..... . ............. @n_r_ri -- 2.43.0