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Re: [Qemu-devel] [PATCH v2 08/17] target-arm: Add SCR_EL3
From: |
Edgar E. Iglesias |
Subject: |
Re: [Qemu-devel] [PATCH v2 08/17] target-arm: Add SCR_EL3 |
Date: |
Wed, 11 Jun 2014 11:19:42 +1000 |
User-agent: |
Mutt/1.5.21+155 (d3096e8796e7) (2012-12-30) |
On Tue, Jun 10, 2014 at 10:06:31PM +0000, Aggeler Fabian wrote:
>
> On 09 Jun 2014, at 17:04, Edgar E. Iglesias <address@hidden> wrote:
>
> > From: "Edgar E. Iglesias" <address@hidden>
> >
> > Signed-off-by: Edgar E. Iglesias <address@hidden>
> > ---
> > target-arm/cpu.h | 15 +++++++++++++++
> > target-arm/helper.c | 29 +++++++++++++++++++++++++++++
> > 2 files changed, 44 insertions(+)
> >
> > diff --git a/target-arm/cpu.h b/target-arm/cpu.h
> > index cd8c9a7..111577c 100644
> > --- a/target-arm/cpu.h
> > +++ b/target-arm/cpu.h
> > @@ -185,6 +185,7 @@ typedef struct CPUARMState {
> > uint32_t pmsav5_data_ap; /* PMSAv5 MPU data access permissions */
> > uint32_t pmsav5_insn_ap; /* PMSAv5 MPU insn access permissions */
> > uint64_t hcr_el2; /* Hypervisor configuration register */
> > + uint32_t scr_el3; /* Secure configuration register. */
>
> Is there a reason why we cannot map the Aarch32 SCR (c1_scr) to SCR_EL3?
> Otherwise I suggest removing the existing c1_scr in this patch and adjusting
> the
> .fieldoffset of the Aarch32 SCR register definition.
Hi,
I had missed that. Will fix for v3, thanks!
Cheers,
Edgar
>
> Best,
> Fabian
>
> > uint32_t ifsr_el2; /* Fault status registers. */
> > uint64_t esr_el[4];
> > uint32_t c6_region[8]; /* MPU base/size registers. */
> > @@ -561,6 +562,20 @@ static inline void xpsr_write(CPUARMState *env,
> > uint32_t val, uint32_t mask)
> > #define HCR_ID (1ULL << 33)
> > #define HCR_MASK ((1ULL << 34) - 1)
> >
> > +#define SCR_NS (1U << 0)
> > +#define SCR_IRQ (1U << 1)
> > +#define SCR_FIQ (1U << 2)
> > +#define SCR_EA (1U << 3)
> > +#define SCR_SMD (1U << 7)
> > +#define SCR_HCE (1U << 8)
> > +#define SCR_SIF (1U << 9)
> > +#define SCR_RW (1U << 10)
> > +#define SCR_ST (1U << 11)
> > +#define SCR_TWI (1U << 12)
> > +#define SCR_TWE (1U << 13)
> > +#define SCR_RES1_MASK (3U << 4)
> > +#define SCR_MASK (0x3fff & ~SCR_RES1_MASK)
> > +
> > /* Return the current FPSCR value. */
> > uint32_t vfp_get_fpscr(CPUARMState *env);
> > void vfp_set_fpscr(CPUARMState *env, uint32_t val);
> > diff --git a/target-arm/helper.c b/target-arm/helper.c
> > index d28951a..17cf80e 100644
> > --- a/target-arm/helper.c
> > +++ b/target-arm/helper.c
> > @@ -2162,6 +2162,31 @@ static const ARMCPRegInfo v8_el2_cp_reginfo[] = {
> > REGINFO_SENTINEL
> > };
> >
> > +static void scr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t
> > value)
> > +{
> > + uint32_t valid_mask = SCR_MASK;
> > +
> > + if (!arm_feature(env, ARM_FEATURE_EL2)) {
> > + valid_mask &= ~SCR_HCE;
> > +
> > + /* On ARMv7, SMD (or SCD as it is called in v7) is only
> > + * supported if EL2 exists. The bit is UNK/SBZP when
> > + * EL2 is unavailable. In QEMU ARMv7, we force it to always zero
> > + * when EL2 is unavailable.
> > + */
> > + if (arm_feature(env, ARM_FEATURE_V7)) {
> > + valid_mask &= ~SCR_SMD;
> > + }
> > + }
> > +
> > + /* Set RES1 bits. */
> > + value |= SCR_RES1_MASK;
> > +
> > + /* Clear RES0 bits. */
> > + value &= valid_mask;
> > + raw_write(env, ri, value);
> > +}
> > +
> > static const ARMCPRegInfo v8_el3_cp_reginfo[] = {
> > { .name = "ELR_EL3", .state = ARM_CP_STATE_AA64,
> > .type = ARM_CP_NO_MIGRATE,
> > @@ -2184,6 +2209,10 @@ static const ARMCPRegInfo v8_el3_cp_reginfo[] = {
> > .access = PL3_RW, .writefn = vbar_write,
> > .fieldoffset = offsetof(CPUARMState, cp15.vbar_el[3]),
> > .resetvalue = 0 },
> > + { .name = "SCR_EL3", .state = ARM_CP_STATE_AA64,
> > + .opc0 = 3, .opc1 = 6, .crn = 1, .crm = 1, .opc2 = 0,
> > + .access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.scr_el3),
> > + .writefn = scr_write },
> > REGINFO_SENTINEL
> > };
> >
> > --
> > 1.8.3.2
> >
>
- Re: [Qemu-devel] [PATCH v2 04/17] target-arm: Make far_el1 an array, (continued)
- [Qemu-devel] [PATCH v2 05/17] target-arm: Add ESR_EL2 and 3, Edgar E. Iglesias, 2014/06/09
- [Qemu-devel] [PATCH v2 06/17] target-arm: Add FAR_EL2 and 3, Edgar E. Iglesias, 2014/06/09
- [Qemu-devel] [PATCH v2 07/17] target-arm: Add HCR_EL2, Edgar E. Iglesias, 2014/06/09
- [Qemu-devel] [PATCH v2 08/17] target-arm: Add SCR_EL3, Edgar E. Iglesias, 2014/06/09
- [Qemu-devel] [PATCH v2 09/17] target-arm: A64: Refactor aarch64_cpu_do_interrupt, Edgar E. Iglesias, 2014/06/09
- [Qemu-devel] [PATCH v2 10/17] target-arm: Break out exception masking to a separate func, Edgar E. Iglesias, 2014/06/09
- [Qemu-devel] [PATCH v2 11/17] target-arm: Don't take interrupts targeting lower ELs, Edgar E. Iglesias, 2014/06/09
- [Qemu-devel] [PATCH v2 12/17] target-arm: A64: Correct updates to FAR and ESR on exceptions, Edgar E. Iglesias, 2014/06/09
- [Qemu-devel] [PATCH v2 13/17] target-arm: Use uint16_t in syndrome generators with 16bit imms, Edgar E. Iglesias, 2014/06/09