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Message-ID: <CAOnJCUJUUtRhkroxJ-Kvah7qRfsAApi_5dbrmAWsdObr-KjRfw@mail.gmail.com>
Date: Thu, 17 Oct 2024 16:55:14 -0700
From: Atish Patra <atishp@...shpatra.org>
To: Anup Patel <apatel@...tanamicro.com>
Cc: Palmer Dabbelt <palmer@...belt.com>, Paul Walmsley <paul.walmsley@...ive.com>,
Andrew Jones <ajones@...tanamicro.com>, Anup Patel <anup@...infault.org>, kvm@...r.kernel.org,
kvm-riscv@...ts.infradead.org, linux-riscv@...ts.infradead.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/13] RISC-V: Add defines for the SBI nested acceleration extension
On Fri, Jul 19, 2024 at 9:09 AM Anup Patel <apatel@...tanamicro.com> wrote:
>
> Add defines for the new SBI nested acceleration extension which was
> ratified as part of the SBI v2.0 specification.
>
> Signed-off-by: Anup Patel <apatel@...tanamicro.com>
> ---
> arch/riscv/include/asm/sbi.h | 120 +++++++++++++++++++++++++++++++++++
> 1 file changed, 120 insertions(+)
>
> diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
> index 1079e214fe85..7c9ec953c519 100644
> --- a/arch/riscv/include/asm/sbi.h
> +++ b/arch/riscv/include/asm/sbi.h
> @@ -33,6 +33,7 @@ enum sbi_ext_id {
> SBI_EXT_PMU = 0x504D55,
> SBI_EXT_DBCN = 0x4442434E,
> SBI_EXT_STA = 0x535441,
> + SBI_EXT_NACL = 0x4E41434C,
>
> /* Experimentals extensions must lie within this range */
> SBI_EXT_EXPERIMENTAL_START = 0x08000000,
> @@ -279,6 +280,125 @@ struct sbi_sta_struct {
>
> #define SBI_SHMEM_DISABLE -1
>
> +enum sbi_ext_nacl_fid {
> + SBI_EXT_NACL_PROBE_FEATURE = 0x0,
> + SBI_EXT_NACL_SET_SHMEM = 0x1,
> + SBI_EXT_NACL_SYNC_CSR = 0x2,
> + SBI_EXT_NACL_SYNC_HFENCE = 0x3,
> + SBI_EXT_NACL_SYNC_SRET = 0x4,
> +};
> +
> +enum sbi_ext_nacl_feature {
> + SBI_NACL_FEAT_SYNC_CSR = 0x0,
> + SBI_NACL_FEAT_SYNC_HFENCE = 0x1,
> + SBI_NACL_FEAT_SYNC_SRET = 0x2,
> + SBI_NACL_FEAT_AUTOSWAP_CSR = 0x3,
> +};
> +
> +#define SBI_NACL_SHMEM_ADDR_SHIFT 12
> +#define SBI_NACL_SHMEM_SCRATCH_OFFSET 0x0000
> +#define SBI_NACL_SHMEM_SCRATCH_SIZE 0x1000
> +#define SBI_NACL_SHMEM_SRET_OFFSET 0x0000
> +#define SBI_NACL_SHMEM_SRET_SIZE 0x0200
> +#define SBI_NACL_SHMEM_AUTOSWAP_OFFSET (SBI_NACL_SHMEM_SRET_OFFSET + \
> + SBI_NACL_SHMEM_SRET_SIZE)
> +#define SBI_NACL_SHMEM_AUTOSWAP_SIZE 0x0080
> +#define SBI_NACL_SHMEM_UNUSED_OFFSET (SBI_NACL_SHMEM_AUTOSWAP_OFFSET + \
> + SBI_NACL_SHMEM_AUTOSWAP_SIZE)
> +#define SBI_NACL_SHMEM_UNUSED_SIZE 0x0580
> +#define SBI_NACL_SHMEM_HFENCE_OFFSET (SBI_NACL_SHMEM_UNUSED_OFFSET + \
> + SBI_NACL_SHMEM_UNUSED_SIZE)
> +#define SBI_NACL_SHMEM_HFENCE_SIZE 0x0780
> +#define SBI_NACL_SHMEM_DBITMAP_OFFSET (SBI_NACL_SHMEM_HFENCE_OFFSET + \
> + SBI_NACL_SHMEM_HFENCE_SIZE)
> +#define SBI_NACL_SHMEM_DBITMAP_SIZE 0x0080
> +#define SBI_NACL_SHMEM_CSR_OFFSET (SBI_NACL_SHMEM_DBITMAP_OFFSET + \
> + SBI_NACL_SHMEM_DBITMAP_SIZE)
> +#define SBI_NACL_SHMEM_CSR_SIZE ((__riscv_xlen / 8) * 1024)
> +#define SBI_NACL_SHMEM_SIZE (SBI_NACL_SHMEM_CSR_OFFSET + \
> + SBI_NACL_SHMEM_CSR_SIZE)
> +
> +#define SBI_NACL_SHMEM_CSR_INDEX(__csr_num) \
> + ((((__csr_num) & 0xc00) >> 2) | ((__csr_num) & 0xff))
> +
> +#define SBI_NACL_SHMEM_HFENCE_ENTRY_SZ ((__riscv_xlen / 8) * 4)
> +#define SBI_NACL_SHMEM_HFENCE_ENTRY_MAX \
> + (SBI_NACL_SHMEM_HFENCE_SIZE / \
> + SBI_NACL_SHMEM_HFENCE_ENTRY_SZ)
> +#define SBI_NACL_SHMEM_HFENCE_ENTRY(__num) \
> + (SBI_NACL_SHMEM_HFENCE_OFFSET + \
> + (__num) * SBI_NACL_SHMEM_HFENCE_ENTRY_SZ)
> +#define SBI_NACL_SHMEM_HFENCE_ENTRY_CONFIG(__num) \
> + SBI_NACL_SHMEM_HFENCE_ENTRY(__num)
> +#define SBI_NACL_SHMEM_HFENCE_ENTRY_PNUM(__num)\
> + (SBI_NACL_SHMEM_HFENCE_ENTRY(__num) + (__riscv_xlen / 8))
> +#define SBI_NACL_SHMEM_HFENCE_ENTRY_PCOUNT(__num)\
> + (SBI_NACL_SHMEM_HFENCE_ENTRY(__num) + \
> + ((__riscv_xlen / 8) * 3))
> +
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_PEND_BITS 1
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_PEND_SHIFT \
> + (__riscv_xlen - SBI_NACL_SHMEM_HFENCE_CONFIG_PEND_BITS)
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_PEND_MASK \
> + ((1UL << SBI_NACL_SHMEM_HFENCE_CONFIG_PEND_BITS) - 1)
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_PEND \
> + (SBI_NACL_SHMEM_HFENCE_CONFIG_PEND_MASK << \
> + SBI_NACL_SHMEM_HFENCE_CONFIG_PEND_SHIFT)
> +
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_RSVD1_BITS 3
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_RSVD1_SHIFT \
> + (SBI_NACL_SHMEM_HFENCE_CONFIG_PEND_SHIFT - \
> + SBI_NACL_SHMEM_HFENCE_CONFIG_RSVD1_BITS)
> +
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_TYPE_BITS 4
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_TYPE_SHIFT \
> + (SBI_NACL_SHMEM_HFENCE_CONFIG_RSVD1_SHIFT - \
> + SBI_NACL_SHMEM_HFENCE_CONFIG_TYPE_BITS)
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_TYPE_MASK \
> + ((1UL << SBI_NACL_SHMEM_HFENCE_CONFIG_TYPE_BITS) - 1)
> +
> +#define SBI_NACL_SHMEM_HFENCE_TYPE_GVMA 0x0
> +#define SBI_NACL_SHMEM_HFENCE_TYPE_GVMA_ALL 0x1
> +#define SBI_NACL_SHMEM_HFENCE_TYPE_GVMA_VMID 0x2
> +#define SBI_NACL_SHMEM_HFENCE_TYPE_GVMA_VMID_ALL 0x3
> +#define SBI_NACL_SHMEM_HFENCE_TYPE_VVMA 0x4
> +#define SBI_NACL_SHMEM_HFENCE_TYPE_VVMA_ALL 0x5
> +#define SBI_NACL_SHMEM_HFENCE_TYPE_VVMA_ASID 0x6
> +#define SBI_NACL_SHMEM_HFENCE_TYPE_VVMA_ASID_ALL 0x7
> +
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_RSVD2_BITS 1
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_RSVD2_SHIFT \
> + (SBI_NACL_SHMEM_HFENCE_CONFIG_TYPE_SHIFT - \
> + SBI_NACL_SHMEM_HFENCE_CONFIG_RSVD2_BITS)
> +
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_ORDER_BITS 7
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_ORDER_SHIFT \
> + (SBI_NACL_SHMEM_HFENCE_CONFIG_RSVD2_SHIFT - \
> + SBI_NACL_SHMEM_HFENCE_CONFIG_ORDER_BITS)
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_ORDER_MASK \
> + ((1UL << SBI_NACL_SHMEM_HFENCE_CONFIG_ORDER_BITS) - 1)
> +#define SBI_NACL_SHMEM_HFENCE_ORDER_BASE 12
> +
> +#if __riscv_xlen == 32
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_ASID_BITS 9
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_VMID_BITS 7
> +#else
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_ASID_BITS 16
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_VMID_BITS 14
> +#endif
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_VMID_SHIFT \
> + SBI_NACL_SHMEM_HFENCE_CONFIG_ASID_BITS
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_ASID_MASK \
> + ((1UL << SBI_NACL_SHMEM_HFENCE_CONFIG_ASID_BITS) - 1)
> +#define SBI_NACL_SHMEM_HFENCE_CONFIG_VMID_MASK \
> + ((1UL << SBI_NACL_SHMEM_HFENCE_CONFIG_VMID_BITS) - 1)
> +
> +#define SBI_NACL_SHMEM_AUTOSWAP_FLAG_HSTATUS BIT(0)
> +#define SBI_NACL_SHMEM_AUTOSWAP_HSTATUS ((__riscv_xlen / 8) * 1)
> +
> +#define SBI_NACL_SHMEM_SRET_X(__i) ((__riscv_xlen / 8) * (__i))
> +#define SBI_NACL_SHMEM_SRET_X_LAST 31
> +
> /* SBI spec version fields */
> #define SBI_SPEC_VERSION_DEFAULT 0x1
> #define SBI_SPEC_VERSION_MAJOR_SHIFT 24
> --
> 2.34.1
>
Reviewed-by: Atish Patra <atishp@...osinc.com>
--
Regards,
Atish
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