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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH v4 2/8] xen/arm: Add ID registers and complete cpuinfo
On Thu, 17 Dec 2020, Bertrand Marquis wrote:
> Add definition and entries in cpuinfo for ID registers introduced in
> newer Arm Architecture reference manual:
> - ID_PFR2: processor feature register 2
> - ID_DFR1: debug feature register 1
> - ID_MMFR4 and ID_MMFR5: Memory model feature registers 4 and 5
> - ID_ISA6: ISA Feature register 6
> Add more bitfield definitions in PFR fields of cpuinfo.
> Add MVFR2 register definition for aarch32.
> Add MVFRx_EL1 defines for aarch32.
> Add mvfr values in cpuinfo.
> Add some registers definition for arm64 in sysregs as some are not
> always know by compilers.
> Initialize the new values added in cpuinfo in identify_cpu during init.
>
> Signed-off-by: Bertrand Marquis <bertrand.marquis@xxxxxxx>
Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> ---
> Changes in V2:
> Fix dbg32 table size and add proper initialisation of the second entry
> of the table by reading ID_DFR1 register.
> Changes in V3:
> Fix typo in commit title
> Add MVFR2 definition and handling on aarch32 and remove specific case
> for mvfr field in cpuinfo (now the same on arm64 and arm32).
> Add MMFR4 definition if not known by the compiler.
> Changes in V4:
> Add MVFRx_EL1 defines for aarch32
> Use READ_SYSREG instead of 32/64 versions of the function which
> removed the ifdef case for MVFR access.
> User register_t type for mvfr and zfr64 fields of cpuinfo structure.
>
> ---
> xen/arch/arm/cpufeature.c | 12 +++++++
> xen/include/asm-arm/arm64/sysregs.h | 28 +++++++++++++++
> xen/include/asm-arm/cpregs.h | 15 ++++++++
> xen/include/asm-arm/cpufeature.h | 56 ++++++++++++++++++++++++-----
> 4 files changed, 102 insertions(+), 9 deletions(-)
>
> diff --git a/xen/arch/arm/cpufeature.c b/xen/arch/arm/cpufeature.c
> index 115e1b164d..86b99ee960 100644
> --- a/xen/arch/arm/cpufeature.c
> +++ b/xen/arch/arm/cpufeature.c
> @@ -114,15 +114,20 @@ void identify_cpu(struct cpuinfo_arm *c)
>
> c->mm64.bits[0] = READ_SYSREG(ID_AA64MMFR0_EL1);
> c->mm64.bits[1] = READ_SYSREG(ID_AA64MMFR1_EL1);
> + c->mm64.bits[2] = READ_SYSREG(ID_AA64MMFR2_EL1);
>
> c->isa64.bits[0] = READ_SYSREG(ID_AA64ISAR0_EL1);
> c->isa64.bits[1] = READ_SYSREG(ID_AA64ISAR1_EL1);
> +
> + c->zfr64.bits[0] = READ_SYSREG(ID_AA64ZFR0_EL1);
> #endif
>
> c->pfr32.bits[0] = READ_SYSREG(ID_PFR0_EL1);
> c->pfr32.bits[1] = READ_SYSREG(ID_PFR1_EL1);
> + c->pfr32.bits[2] = READ_SYSREG(ID_PFR2_EL1);
>
> c->dbg32.bits[0] = READ_SYSREG(ID_DFR0_EL1);
> + c->dbg32.bits[1] = READ_SYSREG(ID_DFR1_EL1);
>
> c->aux32.bits[0] = READ_SYSREG(ID_AFR0_EL1);
>
> @@ -130,6 +135,8 @@ void identify_cpu(struct cpuinfo_arm *c)
> c->mm32.bits[1] = READ_SYSREG(ID_MMFR1_EL1);
> c->mm32.bits[2] = READ_SYSREG(ID_MMFR2_EL1);
> c->mm32.bits[3] = READ_SYSREG(ID_MMFR3_EL1);
> + c->mm32.bits[4] = READ_SYSREG(ID_MMFR4_EL1);
> + c->mm32.bits[5] = READ_SYSREG(ID_MMFR5_EL1);
>
> c->isa32.bits[0] = READ_SYSREG(ID_ISAR0_EL1);
> c->isa32.bits[1] = READ_SYSREG(ID_ISAR1_EL1);
> @@ -137,6 +144,11 @@ void identify_cpu(struct cpuinfo_arm *c)
> c->isa32.bits[3] = READ_SYSREG(ID_ISAR3_EL1);
> c->isa32.bits[4] = READ_SYSREG(ID_ISAR4_EL1);
> c->isa32.bits[5] = READ_SYSREG(ID_ISAR5_EL1);
> + c->isa32.bits[6] = READ_SYSREG(ID_ISAR6_EL1);
> +
> + c->mvfr.bits[0] = READ_SYSREG(MVFR0_EL1);
> + c->mvfr.bits[1] = READ_SYSREG(MVFR1_EL1);
> + c->mvfr.bits[2] = READ_SYSREG(MVFR2_EL1);
> }
>
> /*
> diff --git a/xen/include/asm-arm/arm64/sysregs.h
> b/xen/include/asm-arm/arm64/sysregs.h
> index c60029d38f..077fd95fb7 100644
> --- a/xen/include/asm-arm/arm64/sysregs.h
> +++ b/xen/include/asm-arm/arm64/sysregs.h
> @@ -57,6 +57,34 @@
> #define ICH_AP1R2_EL2 __AP1Rx_EL2(2)
> #define ICH_AP1R3_EL2 __AP1Rx_EL2(3)
>
> +/*
> + * Define ID coprocessor registers if they are not
> + * already defined by the compiler.
> + *
> + * Values picked from linux kernel
> + */
> +#ifndef ID_AA64MMFR2_EL1
> +#define ID_AA64MMFR2_EL1 S3_0_C0_C7_2
> +#endif
> +#ifndef ID_PFR2_EL1
> +#define ID_PFR2_EL1 S3_0_C0_C3_4
> +#endif
> +#ifndef ID_MMFR4_EL1
> +#define ID_MMFR4_EL1 S3_0_C0_C2_6
> +#endif
> +#ifndef ID_MMFR5_EL1
> +#define ID_MMFR5_EL1 S3_0_C0_C3_6
> +#endif
> +#ifndef ID_ISAR6_EL1
> +#define ID_ISAR6_EL1 S3_0_C0_C2_7
> +#endif
> +#ifndef ID_AA64ZFR0_EL1
> +#define ID_AA64ZFR0_EL1 S3_0_C0_C4_4
> +#endif
> +#ifndef ID_DFR1_EL1
> +#define ID_DFR1_EL1 S3_0_C0_C3_5
> +#endif
> +
> /* Access to system registers */
>
> #define READ_SYSREG32(name) ((uint32_t)READ_SYSREG64(name))
> diff --git a/xen/include/asm-arm/cpregs.h b/xen/include/asm-arm/cpregs.h
> index 8fd344146e..6daf2b1a30 100644
> --- a/xen/include/asm-arm/cpregs.h
> +++ b/xen/include/asm-arm/cpregs.h
> @@ -63,6 +63,8 @@
> #define FPSID p10,7,c0,c0,0 /* Floating-Point System ID Register
> */
> #define FPSCR p10,7,c1,c0,0 /* Floating-Point Status and Control
> Register */
> #define MVFR0 p10,7,c7,c0,0 /* Media and VFP Feature Register 0
> */
> +#define MVFR1 p10,7,c6,c0,0 /* Media and VFP Feature Register 1
> */
> +#define MVFR2 p10,7,c5,c0,0 /* Media and VFP Feature Register 2
> */
> #define FPEXC p10,7,c8,c0,0 /* Floating-Point Exception Control
> Register */
> #define FPINST p10,7,c9,c0,0 /* Floating-Point Instruction
> Register */
> #define FPINST2 p10,7,c10,c0,0 /* Floating-point Instruction
> Register 2 */
> @@ -108,18 +110,23 @@
> #define MPIDR p15,0,c0,c0,5 /* Multiprocessor Affinity Register
> */
> #define ID_PFR0 p15,0,c0,c1,0 /* Processor Feature Register 0 */
> #define ID_PFR1 p15,0,c0,c1,1 /* Processor Feature Register 1 */
> +#define ID_PFR2 p15,0,c0,c3,4 /* Processor Feature Register 2 */
> #define ID_DFR0 p15,0,c0,c1,2 /* Debug Feature Register 0 */
> +#define ID_DFR1 p15,0,c0,c3,5 /* Debug Feature Register 1 */
> #define ID_AFR0 p15,0,c0,c1,3 /* Auxiliary Feature Register 0 */
> #define ID_MMFR0 p15,0,c0,c1,4 /* Memory Model Feature Register 0 */
> #define ID_MMFR1 p15,0,c0,c1,5 /* Memory Model Feature Register 1 */
> #define ID_MMFR2 p15,0,c0,c1,6 /* Memory Model Feature Register 2 */
> #define ID_MMFR3 p15,0,c0,c1,7 /* Memory Model Feature Register 3 */
> +#define ID_MMFR4 p15,0,c0,c2,6 /* Memory Model Feature Register 4 */
> +#define ID_MMFR5 p15,0,c0,c3,6 /* Memory Model Feature Register 5 */
> #define ID_ISAR0 p15,0,c0,c2,0 /* ISA Feature Register 0 */
> #define ID_ISAR1 p15,0,c0,c2,1 /* ISA Feature Register 1 */
> #define ID_ISAR2 p15,0,c0,c2,2 /* ISA Feature Register 2 */
> #define ID_ISAR3 p15,0,c0,c2,3 /* ISA Feature Register 3 */
> #define ID_ISAR4 p15,0,c0,c2,4 /* ISA Feature Register 4 */
> #define ID_ISAR5 p15,0,c0,c2,5 /* ISA Feature Register 5 */
> +#define ID_ISAR6 p15,0,c0,c2,7 /* ISA Feature Register 6 */
> #define CCSIDR p15,1,c0,c0,0 /* Cache Size ID Registers */
> #define CLIDR p15,1,c0,c0,1 /* Cache Level ID Register */
> #define CSSELR p15,2,c0,c0,0 /* Cache Size Selection Register */
> @@ -312,18 +319,23 @@
> #define HSTR_EL2 HSTR
> #define ID_AFR0_EL1 ID_AFR0
> #define ID_DFR0_EL1 ID_DFR0
> +#define ID_DFR1_EL1 ID_DFR1
> #define ID_ISAR0_EL1 ID_ISAR0
> #define ID_ISAR1_EL1 ID_ISAR1
> #define ID_ISAR2_EL1 ID_ISAR2
> #define ID_ISAR3_EL1 ID_ISAR3
> #define ID_ISAR4_EL1 ID_ISAR4
> #define ID_ISAR5_EL1 ID_ISAR5
> +#define ID_ISAR6_EL1 ID_ISAR6
> #define ID_MMFR0_EL1 ID_MMFR0
> #define ID_MMFR1_EL1 ID_MMFR1
> #define ID_MMFR2_EL1 ID_MMFR2
> #define ID_MMFR3_EL1 ID_MMFR3
> +#define ID_MMFR4_EL1 ID_MMFR4
> +#define ID_MMFR5_EL1 ID_MMFR5
> #define ID_PFR0_EL1 ID_PFR0
> #define ID_PFR1_EL1 ID_PFR1
> +#define ID_PFR2_EL1 ID_PFR2
> #define IFSR32_EL2 IFSR
> #define MDCR_EL2 HDCR
> #define MIDR_EL1 MIDR
> @@ -347,6 +359,9 @@
> #define VPIDR_EL2 VPIDR
> #define VTCR_EL2 VTCR
> #define VTTBR_EL2 VTTBR
> +#define MVFR0_EL1 MVFR0
> +#define MVFR1_EL1 MVFR1
> +#define MVFR2_EL1 MVFR2
> #endif
>
> #endif
> diff --git a/xen/include/asm-arm/cpufeature.h
> b/xen/include/asm-arm/cpufeature.h
> index c7b5052992..74139be1cc 100644
> --- a/xen/include/asm-arm/cpufeature.h
> +++ b/xen/include/asm-arm/cpufeature.h
> @@ -148,6 +148,7 @@ struct cpuinfo_arm {
> union {
> uint64_t bits[2];
> struct {
> + /* PFR0 */
> unsigned long el0:4;
> unsigned long el1:4;
> unsigned long el2:4;
> @@ -155,9 +156,23 @@ struct cpuinfo_arm {
> unsigned long fp:4; /* Floating Point */
> unsigned long simd:4; /* Advanced SIMD */
> unsigned long gic:4; /* GIC support */
> - unsigned long __res0:28;
> + unsigned long ras:4;
> + unsigned long sve:4;
> + unsigned long sel2:4;
> + unsigned long mpam:4;
> + unsigned long amu:4;
> + unsigned long dit:4;
> + unsigned long __res0:4;
> unsigned long csv2:4;
> - unsigned long __res1:4;
> + unsigned long cvs3:4;
> +
> + /* PFR1 */
> + unsigned long bt:4;
> + unsigned long ssbs:4;
> + unsigned long mte:4;
> + unsigned long ras_frac:4;
> + unsigned long mpam_frac:4;
> + unsigned long __res1:44;
> };
> } pfr64;
>
> @@ -170,7 +185,7 @@ struct cpuinfo_arm {
> } aux64;
>
> union {
> - uint64_t bits[2];
> + uint64_t bits[3];
> struct {
> unsigned long pa_range:4;
> unsigned long asid_bits:4;
> @@ -190,6 +205,8 @@ struct cpuinfo_arm {
> unsigned long pan:4;
> unsigned long __res1:8;
> unsigned long __res2:32;
> +
> + unsigned long __res3:64;
> };
> } mm64;
>
> @@ -197,6 +214,10 @@ struct cpuinfo_arm {
> uint64_t bits[2];
> } isa64;
>
> + struct {
> + register_t bits[1];
> + } zfr64;
> +
> #endif
>
> /*
> @@ -204,25 +225,38 @@ struct cpuinfo_arm {
> * when running in 32-bit mode.
> */
> union {
> - uint32_t bits[2];
> + uint32_t bits[3];
> struct {
> + /* PFR0 */
> unsigned long arm:4;
> unsigned long thumb:4;
> unsigned long jazelle:4;
> unsigned long thumbee:4;
> - unsigned long __res0:16;
> + unsigned long csv2:4;
> + unsigned long amu:4;
> + unsigned long dit:4;
> + unsigned long ras:4;
>
> + /* PFR1 */
> unsigned long progmodel:4;
> unsigned long security:4;
> unsigned long mprofile:4;
> unsigned long virt:4;
> unsigned long gentimer:4;
> - unsigned long __res1:12;
> + unsigned long sec_frac:4;
> + unsigned long virt_frac:4;
> + unsigned long gic:4;
> +
> + /* PFR2 */
> + unsigned long csv3:4;
> + unsigned long ssbs:4;
> + unsigned long ras_frac:4;
> + unsigned long __res2:20;
> };
> } pfr32;
>
> struct {
> - uint32_t bits[1];
> + uint32_t bits[2];
> } dbg32;
>
> struct {
> @@ -230,12 +264,16 @@ struct cpuinfo_arm {
> } aux32;
>
> struct {
> - uint32_t bits[4];
> + uint32_t bits[6];
> } mm32;
>
> struct {
> - uint32_t bits[6];
> + uint32_t bits[7];
> } isa32;
> +
> + struct {
> + register_t bits[3];
> + } mvfr;
> };
>
> extern struct cpuinfo_arm boot_cpu_data;
> --
> 2.17.1
>
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