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Wed, 27 Nov 2024 09:01:52 -0800 (PST) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Alex=20Benn=C3=A9e?= , Andrei Homescu , =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= , =?UTF-8?q?R=C3=A9mi=20Denis-Courmont?= , Peter Maydell , qemu-arm@nongnu.org (open list:Virt) Subject: [RFC PATCH] target/arm: implement SEL2 physical and virtual timers Date: Wed, 27 Nov 2024 17:01:43 +0000 Message-Id: <20241127170143.1664829-1-alex.bennee@linaro.org> X-Mailer: git-send-email 2.39.5 MIME-Version: 1.0 Content-Type: text/plain; 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=2a00:1450:4864:20::42d; envelope-from=alex.bennee@linaro.org; helo=mail-wr1-x42d.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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1732727000836019100 When FEAT_SEL2 was implemented the SEL2 timers where missed. This shows up when building the latest Hafnium with SPMC_AT_EL=3D2. The actual implementation utilises the same logic as the rest of the timers so all we need to do is: - define the timers and their access functions - conditionally add the correct system registers - create a new accessfn as the rules are subtly different to the existing secure timer Fixes: e9152ee91c (target/arm: add ARMv8.4-SEL2 system registers) Signed-off-by: Alex Benn=C3=A9e Cc: Andrei Homescu Cc: Arve Hj=C3=B8nnev=C3=A5g Cc: R=C3=A9mi Denis-Courmont --- include/hw/arm/bsa.h | 2 + target/arm/cpu.h | 2 + target/arm/gtimer.h | 4 +- hw/arm/virt.c | 2 + target/arm/cpu.c | 8 +++ target/arm/helper.c | 155 +++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 172 insertions(+), 1 deletion(-) diff --git a/include/hw/arm/bsa.h b/include/hw/arm/bsa.h index 8eaab603c0..b4ecca1b1c 100644 --- a/include/hw/arm/bsa.h +++ b/include/hw/arm/bsa.h @@ -22,6 +22,8 @@ #define QEMU_ARM_BSA_H =20 /* These are architectural INTID values */ +#define ARCH_TIMER_S_VIRT_EL2_IRQ 19 +#define ARCH_TIMER_S_EL2_IRQ 20 #define VIRTUAL_PMU_IRQ 23 #define ARCH_GIC_MAINT_IRQ 25 #define ARCH_TIMER_NS_EL2_IRQ 26 diff --git a/target/arm/cpu.h b/target/arm/cpu.h index d86e641280..10b5354d6f 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -1139,6 +1139,8 @@ void arm_gt_vtimer_cb(void *opaque); void arm_gt_htimer_cb(void *opaque); void arm_gt_stimer_cb(void *opaque); void arm_gt_hvtimer_cb(void *opaque); +void arm_gt_sel2timer_cb(void *opaque); +void arm_gt_sel2vtimer_cb(void *opaque); =20 unsigned int gt_cntfrq_period_ns(ARMCPU *cpu); void gt_rme_post_el_change(ARMCPU *cpu, void *opaque); diff --git a/target/arm/gtimer.h b/target/arm/gtimer.h index b992941bef..3c097c59c7 100644 --- a/target/arm/gtimer.h +++ b/target/arm/gtimer.h @@ -15,7 +15,9 @@ enum { GTIMER_HYP =3D 2, GTIMER_SEC =3D 3, GTIMER_HYPVIRT =3D 4, -#define NUM_GTIMERS 5 + GTIMER_SEC_PEL2 =3D 5, + GTIMER_SEC_VEL2 =3D 6, +#define NUM_GTIMERS 7 }; =20 #endif diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 1a381e9a2b..451d154459 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -873,6 +873,8 @@ static void create_gic(VirtMachineState *vms, MemoryReg= ion *mem) [GTIMER_HYP] =3D ARCH_TIMER_NS_EL2_IRQ, [GTIMER_SEC] =3D ARCH_TIMER_S_EL1_IRQ, [GTIMER_HYPVIRT] =3D ARCH_TIMER_NS_EL2_VIRT_IRQ, + [GTIMER_SEC_PEL2] =3D ARCH_TIMER_S_EL2_IRQ, + [GTIMER_SEC_VEL2] =3D ARCH_TIMER_S_VIRT_EL2_IRQ, }; =20 for (unsigned irq =3D 0; irq < ARRAY_SIZE(timer_irq); irq++) { diff --git a/target/arm/cpu.c b/target/arm/cpu.c index 6938161b95..e42ab8ce8b 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -2078,6 +2078,14 @@ static void arm_cpu_realizefn(DeviceState *dev, Erro= r **errp) arm_gt_stimer_cb, cpu); cpu->gt_timer[GTIMER_HYPVIRT] =3D timer_new(QEMU_CLOCK_VIRTUAL, sc= ale, arm_gt_hvtimer_cb, cpu); + + /* FEAT_SEL2 also has physical and virtual timers */ + if (cpu_isar_feature(aa64_sel2, cpu)) { + cpu->gt_timer[GTIMER_SEC_PEL2] =3D timer_new(QEMU_CLOCK_VIRTUA= L, scale, + arm_gt_sel2timer_cb= , cpu); + cpu->gt_timer[GTIMER_SEC_VEL2] =3D timer_new(QEMU_CLOCK_VIRTUA= L, scale, + arm_gt_sel2vtimer_c= b, cpu); + } } #endif =20 diff --git a/target/arm/helper.c b/target/arm/helper.c index f38eb054c0..b5a8a5846e 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -2668,6 +2668,41 @@ static CPAccessResult gt_stimer_access(CPUARMState *= env, } } =20 +static CPAccessResult gt_sel2timer_access(CPUARMState *env, + const ARMCPRegInfo *ri, + bool isread) +{ + /* + * The AArch64 register view of the secure EL2 timers are mostly + * accessible from EL3 and EL2 although can also be trapped to EL2 + * from EL1 depending on nested virt config. + */ + switch (arm_current_el(env)) { + case 0: + return CP_ACCESS_TRAP; + case 1: + if (!arm_is_secure(env)) { + return CP_ACCESS_TRAP; + } else if (arm_hcr_el2_eff(env) & HCR_NV) { + return CP_ACCESS_TRAP_EL2; + } + return CP_ACCESS_TRAP; + case 2: + if (!arm_is_secure(env)) { + return CP_ACCESS_TRAP; + } + return CP_ACCESS_OK; + case 3: + if (env->cp15.scr_el3 & SCR_EEL2) { + return CP_ACCESS_OK; + } else { + return CP_ACCESS_TRAP; + } + default: + g_assert_not_reached(); + } +} + uint64_t gt_get_countervalue(CPUARMState *env) { ARMCPU *cpu =3D env_archcpu(env); @@ -3175,6 +3210,62 @@ static void gt_sec_ctl_write(CPUARMState *env, const= ARMCPRegInfo *ri, gt_ctl_write(env, ri, GTIMER_SEC, value); } =20 +static void gt_sec_pel2_timer_reset(CPUARMState *env, const ARMCPRegInfo *= ri) +{ + gt_timer_reset(env, ri, GTIMER_SEC_PEL2); +} + +static void gt_sec_pel2_cval_write(CPUARMState *env, const ARMCPRegInfo *r= i, + uint64_t value) +{ + gt_cval_write(env, ri, GTIMER_SEC_PEL2, value); +} + +static uint64_t gt_sec_pel2_tval_read(CPUARMState *env, const ARMCPRegInfo= *ri) +{ + return gt_tval_read(env, ri, GTIMER_SEC_PEL2); +} + +static void gt_sec_pel2_tval_write(CPUARMState *env, const ARMCPRegInfo *r= i, + uint64_t value) +{ + gt_tval_write(env, ri, GTIMER_SEC_PEL2, value); +} + +static void gt_sec_pel2_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + gt_ctl_write(env, ri, GTIMER_SEC_PEL2, value); +} + +static void gt_sec_vel2_timer_reset(CPUARMState *env, const ARMCPRegInfo *= ri) +{ + gt_timer_reset(env, ri, GTIMER_SEC_VEL2); +} + +static void gt_sec_vel2_cval_write(CPUARMState *env, const ARMCPRegInfo *r= i, + uint64_t value) +{ + gt_cval_write(env, ri, GTIMER_SEC_VEL2, value); +} + +static uint64_t gt_sec_vel2_tval_read(CPUARMState *env, const ARMCPRegInfo= *ri) +{ + return gt_tval_read(env, ri, GTIMER_SEC_VEL2); +} + +static void gt_sec_vel2_tval_write(CPUARMState *env, const ARMCPRegInfo *r= i, + uint64_t value) +{ + gt_tval_write(env, ri, GTIMER_SEC_VEL2, value); +} + +static void gt_sec_vel2_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + gt_ctl_write(env, ri, GTIMER_SEC_VEL2, value); +} + static void gt_hv_timer_reset(CPUARMState *env, const ARMCPRegInfo *ri) { gt_timer_reset(env, ri, GTIMER_HYPVIRT); @@ -3231,6 +3322,20 @@ void arm_gt_stimer_cb(void *opaque) gt_recalc_timer(cpu, GTIMER_SEC); } =20 +void arm_gt_sel2timer_cb(void *opaque) +{ + ARMCPU *cpu =3D opaque; + + gt_recalc_timer(cpu, GTIMER_SEC_PEL2); +} + +void arm_gt_sel2vtimer_cb(void *opaque) +{ + ARMCPU *cpu =3D opaque; + + gt_recalc_timer(cpu, GTIMER_SEC_VEL2); +} + void arm_gt_hvtimer_cb(void *opaque) { ARMCPU *cpu =3D opaque; @@ -6613,6 +6718,56 @@ static const ARMCPRegInfo el2_sec_cp_reginfo[] =3D { .access =3D PL2_RW, .accessfn =3D sel2_access, .nv2_redirect_offset =3D 0x48, .fieldoffset =3D offsetof(CPUARMState, cp15.vstcr_el2) }, +#ifndef CONFIG_USER_ONLY + /* Secure EL2 Physical Timer */ + { .name =3D "CNTHPS_TVAL_EL2", .state =3D ARM_CP_STATE_AA64, + .opc0 =3D 3, .opc1 =3D 4, .crn =3D 14, .crm =3D 5, .opc2 =3D 0, + .type =3D ARM_CP_NO_RAW | ARM_CP_IO, .access =3D PL2_RW, + .accessfn =3D gt_sel2timer_access, + .readfn =3D gt_sec_pel2_tval_read, + .writefn =3D gt_sec_pel2_tval_write, + .resetfn =3D gt_sec_pel2_timer_reset, + }, + { .name =3D "CNTHPS_CTL_EL2", .state =3D ARM_CP_STATE_AA64, + .opc0 =3D 3, .opc1 =3D 4, .crn =3D 14, .crm =3D 5, .opc2 =3D 1, + .type =3D ARM_CP_IO, .access =3D PL2_RW, + .accessfn =3D gt_sel2timer_access, + .fieldoffset =3D offsetof(CPUARMState, cp15.c14_timer[GTIMER_SEC_PEL= 2].ctl), + .resetvalue =3D 0, + .writefn =3D gt_sec_pel2_ctl_write, .raw_writefn =3D raw_write, + }, + { .name =3D "CNTHPS_CVAL_EL2", .state =3D ARM_CP_STATE_AA64, + .opc0 =3D 3, .opc1 =3D 4, .crn =3D 14, .crm =3D 5, .opc2 =3D 2, + .type =3D ARM_CP_IO, .access =3D PL2_RW, + .accessfn =3D gt_sel2timer_access, + .fieldoffset =3D offsetof(CPUARMState, cp15.c14_timer[GTIMER_SEC_PEL= 2].cval), + .writefn =3D gt_sec_pel2_cval_write, .raw_writefn =3D raw_write, + }, + /* Secure EL2 Virtual Timer */ + { .name =3D "CNTHVS_TVAL_EL2", .state =3D ARM_CP_STATE_AA64, + .opc0 =3D 3, .opc1 =3D 4, .crn =3D 14, .crm =3D 4, .opc2 =3D 0, + .type =3D ARM_CP_NO_RAW | ARM_CP_IO, .access =3D PL2_RW, + .accessfn =3D gt_sel2timer_access, + .readfn =3D gt_sec_vel2_tval_read, + .writefn =3D gt_sec_vel2_tval_write, + .resetfn =3D gt_sec_vel2_timer_reset, + }, + { .name =3D "CNTHVS_CTL_EL2", .state =3D ARM_CP_STATE_AA64, + .opc0 =3D 3, .opc1 =3D 4, .crn =3D 14, .crm =3D 4, .opc2 =3D 1, + .type =3D ARM_CP_IO, .access =3D PL2_RW, + .accessfn =3D gt_sel2timer_access, + .fieldoffset =3D offsetof(CPUARMState, cp15.c14_timer[GTIMER_SEC_VEL= 2].ctl), + .resetvalue =3D 0, + .writefn =3D gt_sec_vel2_ctl_write, .raw_writefn =3D raw_write, + }, + { .name =3D "CNTHVS_CVAL_EL2", .state =3D ARM_CP_STATE_AA64, + .opc0 =3D 3, .opc1 =3D 4, .crn =3D 14, .crm =3D 4, .opc2 =3D 2, + .type =3D ARM_CP_IO, .access =3D PL2_RW, + .accessfn =3D gt_sel2timer_access, + .fieldoffset =3D offsetof(CPUARMState, cp15.c14_timer[GTIMER_SEC_VEL= 2].cval), + .writefn =3D gt_sec_vel2_cval_write, .raw_writefn =3D raw_write, + }, +#endif }; =20 static CPAccessResult nsacr_access(CPUARMState *env, const ARMCPRegInfo *r= i, --=20 2.39.5