| Message ID | 20231107105145.2916124-1-alex.bennee@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | target/arm: mark the 32bit alias of PAR when LPAE enabled | expand |
On Tue, 7 Nov 2023 at 10:51, Alex Bennée <alex.bennee@linaro.org> wrote: > > We also mark it ARM_CP_NO_GDB so we avoid duplicate PAR's in the > system register XML we send to gdb. > > Suggested-by: <richard.henderson@linaro.org> > Signed-off-by: Alex Bennée <alex.bennee@linaro.org> > > --- > v2 > - only set ARM_CP_NO_GDB when no LPAE enabled > - also mark as AP_CP_ALIAS > --- > target/arm/helper.c | 32 ++++++++++++++++++-------------- > 1 file changed, 18 insertions(+), 14 deletions(-) > > diff --git a/target/arm/helper.c b/target/arm/helper.c > index 5dc0d20a84..80a35b29bb 100644 > --- a/target/arm/helper.c > +++ b/target/arm/helper.c > @@ -3722,20 +3722,6 @@ static void ats_write64(CPUARMState *env, const ARMCPRegInfo *ri, > } > #endif > > -static const ARMCPRegInfo vapa_cp_reginfo[] = { > - { .name = "PAR", .cp = 15, .crn = 7, .crm = 4, .opc1 = 0, .opc2 = 0, > - .access = PL1_RW, .resetvalue = 0, > - .bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.par_s), > - offsetoflow32(CPUARMState, cp15.par_ns) }, > - .writefn = par_write }, > -#ifndef CONFIG_USER_ONLY > - /* This underdecoding is safe because the reginfo is NO_RAW. */ > - { .name = "ATS", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = CP_ANY, > - .access = PL1_W, .accessfn = ats_access, > - .writefn = ats_write, .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC }, > -#endif > -}; > - > /* Return basic MPU access permission bits. */ > static uint32_t simple_mpu_ap_bits(uint32_t val) > { > @@ -8904,6 +8890,24 @@ void register_cp_regs_for_features(ARMCPU *cpu) > define_arm_cp_regs(cpu, generic_timer_cp_reginfo); > } > if (arm_feature(env, ARM_FEATURE_VAPA)) { > + ARMCPRegInfo vapa_cp_reginfo[] = { > + { .name = "PAR", .cp = 15, .crn = 7, .crm = 4, .opc1 = 0, .opc2 = 0, > + .access = PL1_RW, .resetvalue = 0, > + .bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.par_s), > + offsetoflow32(CPUARMState, cp15.par_ns) }, > + .writefn = par_write}, > +#ifndef CONFIG_USER_ONLY > + /* This underdecoding is safe because the reginfo is NO_RAW. */ > + { .name = "ATS", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = CP_ANY, > + .access = PL1_W, .accessfn = ats_access, > + .writefn = ats_write, .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC }, > +#endif > + }; > + > + /* When LPAE exists the PAR register is an alias */ We could be a little more explicit: /* * When LPAE exists this 32-bit PAR register is an alias of the * 64-bit AArch32 PAR register defined in lpae_cp_reginfo[] */ > + if (arm_feature(env, ARM_FEATURE_LPAE)) { > + vapa_cp_reginfo[0].type = ARM_CP_ALIAS | ARM_CP_NO_GDB; > + } > define_arm_cp_regs(cpu, vapa_cp_reginfo); > } > if (arm_feature(env, ARM_FEATURE_CACHE_TEST_CLEAN)) { Otherwise Reviewed-by: Peter Maydell <peter.maydell@linaro.org> thanks -- PMM
On 11/7/23 02:51, Alex Bennée wrote: > We also mark it ARM_CP_NO_GDB so we avoid duplicate PAR's in the > system register XML we send to gdb. > > Suggested-by: <richard.henderson@linaro.org> > Signed-off-by: Alex Bennée <alex.bennee@linaro.org> > > --- > v2 > - only set ARM_CP_NO_GDB when no LPAE enabled > - also mark as AP_CP_ALIAS > --- > target/arm/helper.c | 32 ++++++++++++++++++-------------- > 1 file changed, 18 insertions(+), 14 deletions(-) > With Peter's comment improvement, Reviewed-by: Richard Henderson <richard.henderson@linaro.org> r~
diff --git a/target/arm/helper.c b/target/arm/helper.c index 5dc0d20a84..80a35b29bb 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -3722,20 +3722,6 @@ static void ats_write64(CPUARMState *env, const ARMCPRegInfo *ri, } #endif -static const ARMCPRegInfo vapa_cp_reginfo[] = { - { .name = "PAR", .cp = 15, .crn = 7, .crm = 4, .opc1 = 0, .opc2 = 0, - .access = PL1_RW, .resetvalue = 0, - .bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.par_s), - offsetoflow32(CPUARMState, cp15.par_ns) }, - .writefn = par_write }, -#ifndef CONFIG_USER_ONLY - /* This underdecoding is safe because the reginfo is NO_RAW. */ - { .name = "ATS", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = CP_ANY, - .access = PL1_W, .accessfn = ats_access, - .writefn = ats_write, .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC }, -#endif -}; - /* Return basic MPU access permission bits. */ static uint32_t simple_mpu_ap_bits(uint32_t val) { @@ -8904,6 +8890,24 @@ void register_cp_regs_for_features(ARMCPU *cpu) define_arm_cp_regs(cpu, generic_timer_cp_reginfo); } if (arm_feature(env, ARM_FEATURE_VAPA)) { + ARMCPRegInfo vapa_cp_reginfo[] = { + { .name = "PAR", .cp = 15, .crn = 7, .crm = 4, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, .resetvalue = 0, + .bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.par_s), + offsetoflow32(CPUARMState, cp15.par_ns) }, + .writefn = par_write}, +#ifndef CONFIG_USER_ONLY + /* This underdecoding is safe because the reginfo is NO_RAW. */ + { .name = "ATS", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = CP_ANY, + .access = PL1_W, .accessfn = ats_access, + .writefn = ats_write, .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC }, +#endif + }; + + /* When LPAE exists the PAR register is an alias */ + if (arm_feature(env, ARM_FEATURE_LPAE)) { + vapa_cp_reginfo[0].type = ARM_CP_ALIAS | ARM_CP_NO_GDB; + } define_arm_cp_regs(cpu, vapa_cp_reginfo); } if (arm_feature(env, ARM_FEATURE_CACHE_TEST_CLEAN)) {
We also mark it ARM_CP_NO_GDB so we avoid duplicate PAR's in the system register XML we send to gdb. Suggested-by: <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> --- v2 - only set ARM_CP_NO_GDB when no LPAE enabled - also mark as AP_CP_ALIAS --- target/arm/helper.c | 32 ++++++++++++++++++-------------- 1 file changed, 18 insertions(+), 14 deletions(-)