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charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::533; envelope-from=philippe.mathieu-daude@fungible.com; helo=mail-pg1-x533.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, T_SCC_BODY_TEXT_LINE=-0.01 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @fungible.com) X-ZM-MESSAGEID: 1652304681084100001 From: Marcin Nowakowski bit 31 (M) of WatchHiN register is a read-only register indicating whether the next WatchHi register is present. It must not be reset during user writes to the register. Signed-off-by: Marcin Nowakowski Reviewed-by: David Daney Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- target/mips/cpu.c | 2 +- target/mips/cpu.h | 1 + target/mips/tcg/sysemu/cp0_helper.c | 3 ++- 3 files changed, 4 insertions(+), 2 deletions(-) diff --git a/target/mips/cpu.c b/target/mips/cpu.c index ad74fbe636..c15c955367 100644 --- a/target/mips/cpu.c +++ b/target/mips/cpu.c @@ -305,7 +305,7 @@ static void mips_cpu_reset(DeviceState *dev) =20 for (i =3D 0; i < 7; i++) { env->CP0_WatchLo[i] =3D 0; - env->CP0_WatchHi[i] =3D 0x80000000; + env->CP0_WatchHi[i] =3D 1 << CP0WH_M; } env->CP0_WatchLo[7] =3D 0; env->CP0_WatchHi[7] =3D 0; diff --git a/target/mips/cpu.h b/target/mips/cpu.h index 5335ac10a3..6b6b8776d1 100644 --- a/target/mips/cpu.h +++ b/target/mips/cpu.h @@ -1005,6 +1005,7 @@ typedef struct CPUArchState { */ uint64_t CP0_WatchHi[8]; #define CP0WH_ASID 16 +#define CP0WH_M 31 /* * CP0 Register 20 */ diff --git a/target/mips/tcg/sysemu/cp0_helper.c b/target/mips/tcg/sysemu/c= p0_helper.c index aae2af6ecc..5da1124589 100644 --- a/target/mips/tcg/sysemu/cp0_helper.c +++ b/target/mips/tcg/sysemu/cp0_helper.c @@ -1396,10 +1396,11 @@ void helper_mtc0_watchlo(CPUMIPSState *env, target_= ulong arg1, uint32_t sel) void helper_mtc0_watchhi(CPUMIPSState *env, target_ulong arg1, uint32_t se= l) { uint64_t mask =3D 0x40000FF8 | (env->CP0_EntryHi_ASID_mask << CP0WH_AS= ID); + uint64_t m_bit =3D env->CP0_WatchHi[sel] & (1 << CP0WH_M); /* read-onl= y */ if ((env->CP0_Config5 >> CP0C5_MI) & 1) { mask |=3D 0xFFFFFFFF00000000ULL; /* MMID */ } - env->CP0_WatchHi[sel] =3D arg1 & mask; + env->CP0_WatchHi[sel] =3D m_bit | (arg1 & mask); env->CP0_WatchHi[sel] &=3D ~(env->CP0_WatchHi[sel] & arg1 & 0x7); } =20 --=20 2.35.1