From: janani <janani@linux.ibm.com>
To: Claudio Carvalho <cclaudio@linux.ibm.com>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>,
Michael Anderson <andmike@linux.ibm.com>,
Ram Pai <linuxram@us.ibm.com>,
kvm-ppc@vger.kernel.org, Bharata B Rao <bharata@linux.ibm.com>,
linuxppc-dev@ozlabs.org, Ryan Grimm <grimm@linux.ibm.com>,
Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>,
Thiago Bauermann <bauerman@linux.ibm.com>,
Anshuman Khandual <khandual@linux.vnet.ibm.com>
Subject: Re: [PATCH v4 2/8] powerpc: Introduce FW_FEATURE_ULTRAVISOR
Date: Mon, 08 Jul 2019 12:40:06 -0500 [thread overview]
Message-ID: <c585a5370f578d2ce7322eebf0496265@linux.vnet.ibm.com> (raw)
In-Reply-To: <20190628200825.31049-3-cclaudio@linux.ibm.com>
On 2019-06-28 15:08, Claudio Carvalho wrote:
> This feature tells if the ultravisor firmware is available to handle
> ucalls.
>
> Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com>
> [ Device node name to "ibm,ultravisor" ]
> Signed-off-by: Michael Anderson <andmike@linux.ibm.com>
Reviewed-by: Janani Janakiraman <janani@linux.ibm.com>
> ---
> arch/powerpc/include/asm/firmware.h | 5 +++--
> arch/powerpc/include/asm/ultravisor.h | 15 +++++++++++++++
> arch/powerpc/kernel/Makefile | 1 +
> arch/powerpc/kernel/prom.c | 4 ++++
> arch/powerpc/kernel/ultravisor.c | 24 ++++++++++++++++++++++++
> 5 files changed, 47 insertions(+), 2 deletions(-)
> create mode 100644 arch/powerpc/include/asm/ultravisor.h
> create mode 100644 arch/powerpc/kernel/ultravisor.c
>
> diff --git a/arch/powerpc/include/asm/firmware.h
> b/arch/powerpc/include/asm/firmware.h
> index 00bc42d95679..43b48c4d3ca9 100644
> --- a/arch/powerpc/include/asm/firmware.h
> +++ b/arch/powerpc/include/asm/firmware.h
> @@ -54,6 +54,7 @@
> #define FW_FEATURE_DRC_INFO ASM_CONST(0x0000000800000000)
> #define FW_FEATURE_BLOCK_REMOVE ASM_CONST(0x0000001000000000)
> #define FW_FEATURE_PAPR_SCM ASM_CONST(0x0000002000000000)
> +#define FW_FEATURE_ULTRAVISOR ASM_CONST(0x0000004000000000)
>
> #ifndef __ASSEMBLY__
>
> @@ -72,9 +73,9 @@ enum {
> FW_FEATURE_TYPE1_AFFINITY | FW_FEATURE_PRRN |
> FW_FEATURE_HPT_RESIZE | FW_FEATURE_DRMEM_V2 |
> FW_FEATURE_DRC_INFO | FW_FEATURE_BLOCK_REMOVE |
> - FW_FEATURE_PAPR_SCM,
> + FW_FEATURE_PAPR_SCM | FW_FEATURE_ULTRAVISOR,
> FW_FEATURE_PSERIES_ALWAYS = 0,
> - FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL,
> + FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL |
> FW_FEATURE_ULTRAVISOR,
> FW_FEATURE_POWERNV_ALWAYS = 0,
> FW_FEATURE_PS3_POSSIBLE = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1,
> FW_FEATURE_PS3_ALWAYS = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1,
> diff --git a/arch/powerpc/include/asm/ultravisor.h
> b/arch/powerpc/include/asm/ultravisor.h
> new file mode 100644
> index 000000000000..e5009b0d84ea
> --- /dev/null
> +++ b/arch/powerpc/include/asm/ultravisor.h
> @@ -0,0 +1,15 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Ultravisor definitions
> + *
> + * Copyright 2019, IBM Corporation.
> + *
> + */
> +#ifndef _ASM_POWERPC_ULTRAVISOR_H
> +#define _ASM_POWERPC_ULTRAVISOR_H
> +
> +/* Internal functions */
> +extern int early_init_dt_scan_ultravisor(unsigned long node, const
> char *uname,
> + int depth, void *data);
> +
> +#endif /* _ASM_POWERPC_ULTRAVISOR_H */
> diff --git a/arch/powerpc/kernel/Makefile
> b/arch/powerpc/kernel/Makefile
> index 0ea6c4aa3a20..f0caa302c8c0 100644
> --- a/arch/powerpc/kernel/Makefile
> +++ b/arch/powerpc/kernel/Makefile
> @@ -154,6 +154,7 @@ endif
>
> obj-$(CONFIG_EPAPR_PARAVIRT) += epapr_paravirt.o epapr_hcalls.o
> obj-$(CONFIG_KVM_GUEST) += kvm.o kvm_emul.o
> +obj-$(CONFIG_PPC_POWERNV) += ultravisor.o
>
> # Disable GCOV, KCOV & sanitizers in odd or sensitive code
> GCOV_PROFILE_prom_init.o := n
> diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
> index 4221527b082f..67a2c1b39252 100644
> --- a/arch/powerpc/kernel/prom.c
> +++ b/arch/powerpc/kernel/prom.c
> @@ -59,6 +59,7 @@
> #include <asm/firmware.h>
> #include <asm/dt_cpu_ftrs.h>
> #include <asm/drmem.h>
> +#include <asm/ultravisor.h>
>
> #include <mm/mmu_decl.h>
>
> @@ -706,6 +707,9 @@ void __init early_init_devtree(void *params)
> #ifdef CONFIG_PPC_POWERNV
> /* Some machines might need OPAL info for debugging, grab it now. */
> of_scan_flat_dt(early_init_dt_scan_opal, NULL);
> +
> + /* Scan tree for ultravisor feature */
> + of_scan_flat_dt(early_init_dt_scan_ultravisor, NULL);
> #endif
>
> #ifdef CONFIG_FA_DUMP
> diff --git a/arch/powerpc/kernel/ultravisor.c
> b/arch/powerpc/kernel/ultravisor.c
> new file mode 100644
> index 000000000000..dc6021f63c97
> --- /dev/null
> +++ b/arch/powerpc/kernel/ultravisor.c
> @@ -0,0 +1,24 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Ultravisor high level interfaces
> + *
> + * Copyright 2019, IBM Corporation.
> + *
> + */
> +#include <linux/init.h>
> +#include <linux/printk.h>
> +#include <linux/string.h>
> +
> +#include <asm/ultravisor.h>
> +#include <asm/firmware.h>
> +
> +int __init early_init_dt_scan_ultravisor(unsigned long node, const
> char *uname,
> + int depth, void *data)
> +{
> + if (depth != 1 || strcmp(uname, "ibm,ultravisor") != 0)
> + return 0;
> +
> + powerpc_firmware_features |= FW_FEATURE_ULTRAVISOR;
> + pr_debug("Ultravisor detected!\n");
> + return 1;
> +}
next prev parent reply other threads:[~2019-07-08 17:39 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-28 20:08 [PATCH v4 0/8] kvmppc: Paravirtualize KVM to support ultravisor Claudio Carvalho
2019-06-28 20:08 ` [PATCH v4 1/8] KVM: PPC: Ultravisor: Introduce the MSR_S bit Claudio Carvalho
2019-07-08 17:38 ` janani
2019-07-11 12:57 ` Michael Ellerman
2019-07-12 0:59 ` Nicholas Piggin
2019-07-12 0:57 ` Nicholas Piggin
2019-07-12 6:29 ` Michael Ellerman
2019-07-12 21:07 ` Claudio Carvalho
2019-06-28 20:08 ` [PATCH v4 2/8] powerpc: Introduce FW_FEATURE_ULTRAVISOR Claudio Carvalho
2019-07-08 17:40 ` janani [this message]
2019-07-11 12:57 ` Michael Ellerman
2019-07-12 18:01 ` Claudio Carvalho
2019-07-15 4:10 ` Michael Ellerman
2019-06-28 20:08 ` [PATCH v4 3/8] KVM: PPC: Ultravisor: Add generic ultravisor call handler Claudio Carvalho
2019-07-08 17:55 ` janani
2019-07-11 12:57 ` Michael Ellerman
2019-07-13 17:42 ` Claudio Carvalho
2019-07-15 4:46 ` Michael Ellerman
2019-07-12 1:18 ` Nicholas Piggin
2019-06-28 20:08 ` [PATCH v4 4/8] KVM: PPC: Ultravisor: Use UV_WRITE_PATE ucall to register a PATE Claudio Carvalho
2019-07-08 17:57 ` janani
2019-07-11 12:57 ` Michael Ellerman
2019-07-17 14:59 ` Ryan Grimm
2019-07-18 21:25 ` Claudio Carvalho
2019-07-19 2:25 ` Michael Ellerman
2019-06-28 20:08 ` [PATCH v4 5/8] KVM: PPC: Ultravisor: Restrict flush of the partition tlb cache Claudio Carvalho
2019-07-01 5:54 ` Alexey Kardashevskiy
2019-07-08 20:05 ` Claudio Carvalho
2019-07-08 19:54 ` janani
2019-07-10 17:09 ` Ram Pai
2019-06-28 20:08 ` [PATCH v4 6/8] KVM: PPC: Ultravisor: Restrict LDBAR access Claudio Carvalho
2019-07-01 5:54 ` Alexey Kardashevskiy
2019-07-01 6:17 ` maddy
2019-07-01 6:30 ` Alexey Kardashevskiy
2019-07-01 6:46 ` Ram Pai
2019-07-13 17:56 ` Claudio Carvalho
2019-07-08 20:22 ` janani
2019-07-11 12:57 ` Michael Ellerman
2019-07-15 0:38 ` Claudio Carvalho
2019-06-28 20:08 ` [PATCH v4 7/8] KVM: PPC: Ultravisor: Enter a secure guest Claudio Carvalho
2019-07-08 20:53 ` janani
2019-07-08 20:52 ` Claudio Carvalho
2019-07-11 12:57 ` Michael Ellerman
2019-07-18 2:47 ` Sukadev Bhattiprolu
2019-07-22 11:05 ` Michael Ellerman
2019-07-12 2:03 ` Nicholas Piggin
2019-06-28 20:08 ` [PATCH v4 8/8] KVM: PPC: Ultravisor: Check for MSR_S during hv_reset_msr Claudio Carvalho
2019-07-08 20:54 ` janani
2019-07-11 12:57 ` Michael Ellerman
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