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Date: Fri, 17 Jan 2020 12:44:06 +0530
From: Anup Patel <anup@...infault.org>
To: Palmer Dabbelt <palmerdabbelt@...gle.com>
Cc: Anup Patel <Anup.Patel@....com>,
Paul Walmsley <paul.walmsley@...ive.com>,
Albert Ou <aou@...s.berkeley.edu>,
Paolo Bonzini <pbonzini@...hat.com>,
Radim K <rkrcmar@...hat.com>, Alexander Graf <graf@...zon.com>,
Atish Patra <Atish.Patra@....com>,
Alistair Francis <Alistair.Francis@....com>,
Damien Le Moal <Damien.LeMoal@....com>,
Christoph Hellwig <hch@....de>,
KVM General <kvm@...r.kernel.org>,
kvm-riscv@...ts.infradead.org,
linux-riscv <linux-riscv@...ts.infradead.org>,
"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v10 03/19] RISC-V: Add hypervisor extension related CSR defines
On Fri, Jan 17, 2020 at 1:21 AM Palmer Dabbelt <palmerdabbelt@...gle.com> wrote:
>
> On Mon, 23 Dec 2019 03:35:33 PST (-0800), Anup Patel wrote:
> > This patch extends asm/csr.h by adding RISC-V hypervisor extension
> > related defines.
> >
> > Signed-off-by: Anup Patel <anup.patel@....com>
> > Acked-by: Paolo Bonzini <pbonzini@...hat.com>
> > Reviewed-by: Paolo Bonzini <pbonzini@...hat.com>
> > Reviewed-by: Alexander Graf <graf@...zon.com>
> > ---
> > arch/riscv/include/asm/csr.h | 78 ++++++++++++++++++++++++++++++++++--
> > 1 file changed, 75 insertions(+), 3 deletions(-)
> >
> > diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h
> > index 0a62d2d68455..afb6733475c2 100644
> > --- a/arch/riscv/include/asm/csr.h
> > +++ b/arch/riscv/include/asm/csr.h
> > @@ -30,6 +30,8 @@
> > #define SR_XS_CLEAN _AC(0x00010000, UL)
> > #define SR_XS_DIRTY _AC(0x00018000, UL)
> >
> > +#define SR_MXR _AC(0x00080000, UL)
> > +
> > #ifndef CONFIG_64BIT
> > #define SR_SD _AC(0x80000000, UL) /* FS/XS dirty */
> > #else
> > @@ -51,26 +53,74 @@
> > #define CAUSE_IRQ_FLAG (_AC(1, UL) << (__riscv_xlen - 1))
> >
> > /* Interrupt causes (minus the high bit) */
> > -#define IRQ_U_SOFT 0
> > #define IRQ_S_SOFT 1
> > +#define IRQ_VS_SOFT 2
>
> Again: please don't mix up cleanups with the KVM port. It's reasonable to
> remove the N extension cruft as it's still in draft and we probably won't
> implement it in Linux, but that shouldn't be mixed up with the KVM
> implementation.
Sure, I will send separate patch for removing IRQ_U_xyz defines
and have only H-extension related defines here.
Regards,
Anup
>
> > #define IRQ_M_SOFT 3
> > -#define IRQ_U_TIMER 4
> > #define IRQ_S_TIMER 5
> > +#define IRQ_VS_TIMER 6
> > #define IRQ_M_TIMER 7
> > -#define IRQ_U_EXT 8
> > #define IRQ_S_EXT 9
> > +#define IRQ_VS_EXT 10
> > #define IRQ_M_EXT 11
> >
> > /* Exception causes */
> > #define EXC_INST_MISALIGNED 0
> > #define EXC_INST_ACCESS 1
> > +#define EXC_INST_ILLEGAL 2
> > #define EXC_BREAKPOINT 3
> > #define EXC_LOAD_ACCESS 5
> > #define EXC_STORE_ACCESS 7
> > #define EXC_SYSCALL 8
> > +#define EXC_HYPERVISOR_SYSCALL 9
> > +#define EXC_SUPERVISOR_SYSCALL 10
> > #define EXC_INST_PAGE_FAULT 12
> > #define EXC_LOAD_PAGE_FAULT 13
> > #define EXC_STORE_PAGE_FAULT 15
> > +#define EXC_INST_GUEST_PAGE_FAULT 20
> > +#define EXC_LOAD_GUEST_PAGE_FAULT 21
> > +#define EXC_STORE_GUEST_PAGE_FAULT 23
> > +
> > +/* HSTATUS flags */
> > +#define HSTATUS_VTSR _AC(0x00400000, UL)
> > +#define HSTATUS_VTVM _AC(0x00100000, UL)
> > +#define HSTATUS_SP2V _AC(0x00000200, UL)
> > +#define HSTATUS_SP2P _AC(0x00000100, UL)
> > +#define HSTATUS_SPV _AC(0x00000080, UL)
> > +#define HSTATUS_SPRV _AC(0x00000001, UL)
> > +
> > +/* HGATP flags */
> > +#define HGATP_MODE_OFF _AC(0, UL)
> > +#define HGATP_MODE_SV32X4 _AC(1, UL)
> > +#define HGATP_MODE_SV39X4 _AC(8, UL)
> > +#define HGATP_MODE_SV48X4 _AC(9, UL)
> > +
> > +#define HGATP32_MODE_SHIFT 31
> > +#define HGATP32_VMID_SHIFT 22
> > +#define HGATP32_VMID_MASK _AC(0x1FC00000, UL)
> > +#define HGATP32_PPN _AC(0x003FFFFF, UL)
> > +
> > +#define HGATP64_MODE_SHIFT 60
> > +#define HGATP64_VMID_SHIFT 44
> > +#define HGATP64_VMID_MASK _AC(0x03FFF00000000000, UL)
> > +#define HGATP64_PPN _AC(0x00000FFFFFFFFFFF, UL)
> > +
> > +#ifdef CONFIG_64BIT
> > +#define HGATP_PPN HGATP64_PPN
> > +#define HGATP_VMID_SHIFT HGATP64_VMID_SHIFT
> > +#define HGATP_VMID_MASK HGATP64_VMID_MASK
> > +#define HGATP_MODE (HGATP_MODE_SV39X4 << HGATP64_MODE_SHIFT)
> > +#else
> > +#define HGATP_PPN HGATP32_PPN
> > +#define HGATP_VMID_SHIFT HGATP32_VMID_SHIFT
> > +#define HGATP_VMID_MASK HGATP32_VMID_MASK
> > +#define HGATP_MODE (HGATP_MODE_SV32X4 << HGATP32_MODE_SHIFT)
> > +#endif
> > +
> > +/* VSIP & HIP relation */
> > +#define VSIP_TO_HIP_SHIFT (IRQ_VS_SOFT - IRQ_S_SOFT)
> > +#define VSIP_VALID_MASK ((_AC(1, UL) << IRQ_S_SOFT) | \
> > + (_AC(1, UL) << IRQ_S_TIMER) | \
> > + (_AC(1, UL) << IRQ_S_EXT))
> >
> > /* symbolic CSR names: */
> > #define CSR_CYCLE 0xc00
> > @@ -91,6 +141,28 @@
> > #define CSR_SIP 0x144
> > #define CSR_SATP 0x180
> >
> > +#define CSR_VSSTATUS 0x200
> > +#define CSR_VSIE 0x204
> > +#define CSR_VSTVEC 0x205
> > +#define CSR_VSSCRATCH 0x240
> > +#define CSR_VSEPC 0x241
> > +#define CSR_VSCAUSE 0x242
> > +#define CSR_VSTVAL 0x243
> > +#define CSR_VSIP 0x244
> > +#define CSR_VSATP 0x280
> > +
> > +#define CSR_HSTATUS 0x600
> > +#define CSR_HEDELEG 0x602
> > +#define CSR_HIDELEG 0x603
> > +#define CSR_HIE 0x604
> > +#define CSR_HTIMEDELTA 0x605
> > +#define CSR_HTIMEDELTAH 0x615
> > +#define CSR_HCOUNTERNEN 0x606
> > +#define CSR_HTVAL 0x643
> > +#define CSR_HIP 0x644
> > +#define CSR_HTINST 0x64a
> > +#define CSR_HGATP 0x680
> > +
> > #define CSR_MSTATUS 0x300
> > #define CSR_MISA 0x301
> > #define CSR_MIE 0x304
> > --
> > 2.17.1
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