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From: Steven Price <steven.price@arm.com>
To: Marc Zyngier <marc.zyngier@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Cc: Julien Thierry <julien.thierry@arm.com>,
	Andre Przywara <andre.przywara@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Christoffer Dall <christoffer.dall@arm.com>,
	Dave Martin <Dave.Martin@arm.com>,
	James Morse <james.morse@arm.com>,
	Jintack Lim <jintack@cs.columbia.edu>
Subject: Re: [PATCH 10/59] KVM: arm64: nv: Support virtual EL2 exceptions
Date: Mon, 8 Jul 2019 14:56:21 +0100
Message-ID: <ffdf5d21-0ed6-7bfa-9d04-7ba02ea28f95@arm.com> (raw)
In-Reply-To: <20190621093843.220980-11-marc.zyngier@arm.com>

On 21/06/2019 10:37, Marc Zyngier wrote:
> From: Jintack Lim <jintack.lim@linaro.org>
> 
> Support injecting exceptions and performing exception returns to and
> from virtual EL2.  This must be done entirely in software except when
> taking an exception from vEL0 to vEL2 when the virtual HCR_EL2.{E2H,TGE}
> == {1,1}  (a VHE guest hypervisor).
> 
> Signed-off-by: Jintack Lim <jintack.lim@linaro.org>
> Signed-off-by: Christoffer Dall <christoffer.dall@arm.com>
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> ---
>  arch/arm64/include/asm/kvm_arm.h     |  17 +++
>  arch/arm64/include/asm/kvm_emulate.h |  22 ++++
>  arch/arm64/kvm/Makefile              |   2 +
>  arch/arm64/kvm/emulate-nested.c      | 184 +++++++++++++++++++++++++++
>  arch/arm64/kvm/inject_fault.c        |  12 --
>  arch/arm64/kvm/trace.h               |  56 ++++++++
>  6 files changed, 281 insertions(+), 12 deletions(-)
>  create mode 100644 arch/arm64/kvm/emulate-nested.c
> 
> diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h
> index 7f9d2bfcf82e..9d70a5362fbb 100644
> --- a/arch/arm64/include/asm/kvm_arm.h
> +++ b/arch/arm64/include/asm/kvm_arm.h
> @@ -339,4 +339,21 @@
>  #define CPACR_EL1_TTA		(1 << 28)
>  #define CPACR_EL1_DEFAULT	(CPACR_EL1_FPEN | CPACR_EL1_ZEN_EL1EN)
>  
> +#define kvm_mode_names				\
> +	{ PSR_MODE_EL0t,	"EL0t" },	\
> +	{ PSR_MODE_EL1t,	"EL1t" },	\
> +	{ PSR_MODE_EL1h,	"EL1h" },	\
> +	{ PSR_MODE_EL2t,	"EL2t" },	\
> +	{ PSR_MODE_EL2h,	"EL2h" },	\
> +	{ PSR_MODE_EL3t,	"EL3t" },	\
> +	{ PSR_MODE_EL3h,	"EL3h" },	\
> +	{ PSR_AA32_MODE_USR,	"32-bit USR" },	\
> +	{ PSR_AA32_MODE_FIQ,	"32-bit FIQ" },	\
> +	{ PSR_AA32_MODE_IRQ,	"32-bit IRQ" },	\
> +	{ PSR_AA32_MODE_SVC,	"32-bit SVC" },	\
> +	{ PSR_AA32_MODE_ABT,	"32-bit ABT" },	\
> +	{ PSR_AA32_MODE_HYP,	"32-bit HYP" },	\
> +	{ PSR_AA32_MODE_UND,	"32-bit UND" },	\
> +	{ PSR_AA32_MODE_SYS,	"32-bit SYS" }
> +
>  #endif /* __ARM64_KVM_ARM_H__ */
> diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
> index 8f201ea56f6e..c43aac5fed69 100644
> --- a/arch/arm64/include/asm/kvm_emulate.h
> +++ b/arch/arm64/include/asm/kvm_emulate.h
> @@ -33,6 +33,24 @@
>  #include <asm/cputype.h>
>  #include <asm/virt.h>
>  
> +#define CURRENT_EL_SP_EL0_VECTOR	0x0
> +#define CURRENT_EL_SP_ELx_VECTOR	0x200
> +#define LOWER_EL_AArch64_VECTOR		0x400
> +#define LOWER_EL_AArch32_VECTOR		0x600
> +
> +enum exception_type {
> +	except_type_sync	= 0,
> +	except_type_irq		= 0x80,
> +	except_type_fiq		= 0x100,
> +	except_type_serror	= 0x180,
> +};
> +
> +#define kvm_exception_type_names		\
> +	{ except_type_sync,	"SYNC"   },	\
> +	{ except_type_irq,	"IRQ"    },	\
> +	{ except_type_fiq,	"FIQ"    },	\
> +	{ except_type_serror,	"SERROR" }
> +
>  unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num);
>  unsigned long vcpu_read_spsr32(const struct kvm_vcpu *vcpu);
>  void vcpu_write_spsr32(struct kvm_vcpu *vcpu, unsigned long v);
> @@ -48,6 +66,10 @@ void kvm_inject_undef32(struct kvm_vcpu *vcpu);
>  void kvm_inject_dabt32(struct kvm_vcpu *vcpu, unsigned long addr);
>  void kvm_inject_pabt32(struct kvm_vcpu *vcpu, unsigned long addr);
>  
> +void kvm_emulate_nested_eret(struct kvm_vcpu *vcpu);
> +int kvm_inject_nested_sync(struct kvm_vcpu *vcpu, u64 esr_el2);
> +int kvm_inject_nested_irq(struct kvm_vcpu *vcpu);
> +
>  static inline bool vcpu_el1_is_32bit(struct kvm_vcpu *vcpu)
>  {
>  	return !(vcpu->arch.hcr_el2 & HCR_RW);
> diff --git a/arch/arm64/kvm/Makefile b/arch/arm64/kvm/Makefile
> index 3ac1a64d2fb9..9e450aea7db6 100644
> --- a/arch/arm64/kvm/Makefile
> +++ b/arch/arm64/kvm/Makefile
> @@ -35,3 +35,5 @@ kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-debug.o
>  kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/irqchip.o
>  kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/arch_timer.o
>  kvm-$(CONFIG_KVM_ARM_PMU) += $(KVM)/arm/pmu.o
> +
> +kvm-$(CONFIG_KVM_ARM_HOST) += emulate-nested.o
> diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c
> new file mode 100644
> index 000000000000..f829b8b04dc8
> --- /dev/null
> +++ b/arch/arm64/kvm/emulate-nested.c
> @@ -0,0 +1,184 @@
> +/*
> + * Copyright (C) 2016 - Linaro and Columbia University
> + * Author: Jintack Lim <jintack.lim@linaro.org>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program.  If not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#include <linux/kvm.h>
> +#include <linux/kvm_host.h>
> +
> +#include <asm/kvm_coproc.h>
> +#include <asm/kvm_emulate.h>
> +#include <asm/kvm_nested.h>
> +
> +#include "trace.h"
> +
> +/* This is borrowed from get_except_vector in inject_fault.c */
> +static u64 get_el2_except_vector(struct kvm_vcpu *vcpu,
> +		enum exception_type type)
> +{
> +	u64 exc_offset;
> +
> +	switch (*vcpu_cpsr(vcpu) & (PSR_MODE_MASK | PSR_MODE32_BIT)) {
> +	case PSR_MODE_EL2t:
> +		exc_offset = CURRENT_EL_SP_EL0_VECTOR;
> +		break;
> +	case PSR_MODE_EL2h:
> +		exc_offset = CURRENT_EL_SP_ELx_VECTOR;
> +		break;
> +	case PSR_MODE_EL1t:
> +	case PSR_MODE_EL1h:
> +	case PSR_MODE_EL0t:
> +		exc_offset = LOWER_EL_AArch64_VECTOR;
> +		break;
> +	default:
> +		kvm_err("Unexpected previous exception level: aarch32\n");
> +		exc_offset = LOWER_EL_AArch32_VECTOR;
> +	}
> +
> +	return vcpu_read_sys_reg(vcpu, VBAR_EL2) + exc_offset + type;
> +}
> +
> +void kvm_emulate_nested_eret(struct kvm_vcpu *vcpu)
> +{
> +	u64 spsr, elr, mode;
> +	bool direct_eret;
> +
> +	/*
> +	 * Going through the whole put/load motions is a waste of time
> +	 * if this is a VHE guest hypervisor returning to its own
> +	 * userspace, or the hypervisor performing a local exception
> +	 * return. No need to save/restore registers, no need to
> +	 * switch S2 MMU. Just do the canonical ERET.
> +	 */
> +	spsr = vcpu_read_sys_reg(vcpu, SPSR_EL2);
> +	mode = spsr & (PSR_MODE_MASK | PSR_MODE32_BIT);
> +
> +	direct_eret  = (mode == PSR_MODE_EL0t &&
> +			vcpu_el2_e2h_is_set(vcpu) &&
> +			vcpu_el2_tge_is_set(vcpu));
> +	direct_eret |= (mode == PSR_MODE_EL2h || mode == PSR_MODE_EL2t);
> +
> +	if (direct_eret) {
> +		*vcpu_pc(vcpu) = vcpu_read_sys_reg(vcpu, ELR_EL2);
> +		*vcpu_cpsr(vcpu) = spsr;
> +		trace_kvm_nested_eret(vcpu, *vcpu_pc(vcpu), *vcpu_cpsr(vcpu));
> +		return;
> +	}
> +
> +	preempt_disable();
> +	kvm_arch_vcpu_put(vcpu);
> +
> +	spsr = __vcpu_sys_reg(vcpu, SPSR_EL2);

Why do we need to reload SPSR here?

> +	elr = __vcpu_sys_reg(vcpu, ELR_EL2);
> +
> +	trace_kvm_nested_eret(vcpu, elr, spsr);
> +
> +	/*
> +	 * Note that the current exception level is always the virtual EL2,
> +	 * since we set HCR_EL2.NV bit only when entering the virtual EL2.
> +	 */
> +	*vcpu_pc(vcpu) = elr;
> +	*vcpu_cpsr(vcpu) = spsr;
> +
> +	kvm_arch_vcpu_load(vcpu, smp_processor_id());
> +	preempt_enable();
> +}
> +
> +static void enter_el2_exception(struct kvm_vcpu *vcpu, u64 esr_el2,
> +				enum exception_type type)
> +{
> +	trace_kvm_inject_nested_exception(vcpu, esr_el2, type);
> +
> +	vcpu_write_sys_reg(vcpu, *vcpu_cpsr(vcpu), SPSR_EL2);
> +	vcpu_write_sys_reg(vcpu, *vcpu_pc(vcpu), ELR_EL2);
> +	vcpu_write_sys_reg(vcpu, esr_el2, ESR_EL2);
> +
> +	*vcpu_pc(vcpu) = get_el2_except_vector(vcpu, type);
> +	/* On an exception, PSTATE.SP becomes 1 */
> +	*vcpu_cpsr(vcpu) = PSR_MODE_EL2h;
> +	*vcpu_cpsr(vcpu) |= PSR_A_BIT | PSR_F_BIT | PSR_I_BIT | PSR_D_BIT;
> +}
> +
> +/*
> + * Emulate taking an exception to EL2.
> + * See ARM ARM J8.1.2 AArch64.TakeException()
> + */
> +static int kvm_inject_nested(struct kvm_vcpu *vcpu, u64 esr_el2,
> +			     enum exception_type type)
> +{
> +	u64 pstate, mode;
> +	bool direct_inject;
> +
> +	if (!nested_virt_in_use(vcpu)) {
> +		kvm_err("Unexpected call to %s for the non-nesting configuration\n",
> +				__func__);
> +		return -EINVAL;
> +	}
> +
> +	/*
> +	 * As for ERET, we can avoid doing too much on the injection path by
> +	 * checking that we either took the exception from a VHE host
> +	 * userspace or from vEL2. In these cases, there is no change in
> +	 * translation regime (or anything else), so let's do as little as
> +	 * possible.
> +	 */
> +	pstate = *vcpu_cpsr(vcpu);
> +	mode = pstate & (PSR_MODE_MASK | PSR_MODE32_BIT);
> +
> +	direct_inject  = (mode == PSR_MODE_EL0t &&
> +			  vcpu_el2_e2h_is_set(vcpu) &&
> +			  vcpu_el2_tge_is_set(vcpu));
> +	direct_inject |= (mode == PSR_MODE_EL2h || mode == PSR_MODE_EL2t);
> +
> +	if (direct_inject) {
> +		enter_el2_exception(vcpu, esr_el2, type);
> +		return 1;
> +	}
> +
> +	preempt_disable();
> +	kvm_arch_vcpu_put(vcpu);
> +
> +	enter_el2_exception(vcpu, esr_el2, type);
> +
> +	kvm_arch_vcpu_load(vcpu, smp_processor_id());
> +	preempt_enable();
> +
> +	return 1;
> +}
> +
> +int kvm_inject_nested_sync(struct kvm_vcpu *vcpu, u64 esr_el2)
> +{
> +	return kvm_inject_nested(vcpu, esr_el2, except_type_sync);
> +}
> +
> +int kvm_inject_nested_irq(struct kvm_vcpu *vcpu)
> +{
> +	/*
> +	 * Do not inject an irq if the:
> +	 *  - Current exception level is EL2, and
> +	 *  - virtual HCR_EL2.TGE == 0
> +	 *  - virtual HCR_EL2.IMO == 0
> +	 *
> +	 * See Table D1-17 "Physical interrupt target and masking when EL3 is
> +	 * not implemented and EL2 is implemented" in ARM DDI 0487C.a.
> +	 */
> +
> +	if (vcpu_mode_el2(vcpu) && !vcpu_el2_tge_is_set(vcpu) &&
> +	    !(__vcpu_sys_reg(vcpu, HCR_EL2) & HCR_IMO))
> +		return 1;
> +
> +	/* esr_el2 value doesn't matter for exits due to irqs. */
> +	return kvm_inject_nested(vcpu, 0, except_type_irq);
> +}
> diff --git a/arch/arm64/kvm/inject_fault.c b/arch/arm64/kvm/inject_fault.c
> index a55e91dfcf8f..fac962b467bd 100644
> --- a/arch/arm64/kvm/inject_fault.c
> +++ b/arch/arm64/kvm/inject_fault.c
> @@ -28,18 +28,6 @@
>  #define PSTATE_FAULT_BITS_64 	(PSR_MODE_EL1h | PSR_A_BIT | PSR_F_BIT | \
>  				 PSR_I_BIT | PSR_D_BIT)
>  
> -#define CURRENT_EL_SP_EL0_VECTOR	0x0
> -#define CURRENT_EL_SP_ELx_VECTOR	0x200
> -#define LOWER_EL_AArch64_VECTOR		0x400
> -#define LOWER_EL_AArch32_VECTOR		0x600
> -
> -enum exception_type {
> -	except_type_sync	= 0,
> -	except_type_irq		= 0x80,
> -	except_type_fiq		= 0x100,
> -	except_type_serror	= 0x180,
> -};
> -
>  static u64 get_except_vector(struct kvm_vcpu *vcpu, enum exception_type type)
>  {
>  	u64 exc_offset;
> diff --git a/arch/arm64/kvm/trace.h b/arch/arm64/kvm/trace.h
> index eab91ad0effb..797a705bb644 100644
> --- a/arch/arm64/kvm/trace.h
> +++ b/arch/arm64/kvm/trace.h
> @@ -204,7 +204,63 @@ TRACE_EVENT(kvm_set_guest_debug,
>  	TP_printk("vcpu: %p, flags: 0x%08x", __entry->vcpu, __entry->guest_debug)
>  );
>  
> +TRACE_EVENT(kvm_nested_eret,
> +	TP_PROTO(struct kvm_vcpu *vcpu, unsigned long elr_el2,
> +		 unsigned long spsr_el2),
> +	TP_ARGS(vcpu, elr_el2, spsr_el2),
>  
> +	TP_STRUCT__entry(
> +		__field(struct kvm_vcpu *,	vcpu)
> +		__field(unsigned long,		elr_el2)
> +		__field(unsigned long,		spsr_el2)
> +		__field(unsigned long,		target_mode)
> +		__field(unsigned long,		hcr_el2)
> +	),
> +
> +	TP_fast_assign(
> +		__entry->vcpu = vcpu;
> +		__entry->elr_el2 = elr_el2;
> +		__entry->spsr_el2 = spsr_el2;
> +		__entry->target_mode = spsr_el2 & (PSR_MODE_MASK | PSR_MODE32_BIT);
> +		__entry->hcr_el2 = __vcpu_sys_reg(vcpu, HCR_EL2);
> +	),
> +
> +	TP_printk("elr_el2: 0x%lx spsr_el2: 0x%08lx (M: %s) hcr_el2: %lx",
> +		  __entry->elr_el2, __entry->spsr_el2,
> +		  __print_symbolic(__entry->target_mode, kvm_mode_names),
> +		  __entry->hcr_el2)
> +);
> +
> +TRACE_EVENT(kvm_inject_nested_exception,
> +	TP_PROTO(struct kvm_vcpu *vcpu, u64 esr_el2, int type),
> +	TP_ARGS(vcpu, esr_el2, type),
> +
> +	TP_STRUCT__entry(
> +		__field(struct kvm_vcpu *,		vcpu)
> +		__field(unsigned long,			esr_el2)
> +		__field(int,				type)
> +		__field(unsigned long,			spsr_el2)
> +		__field(unsigned long,			pc)
> +		__field(int,				source_mode)

NIT: target_mode is "unsigned long", but source_mode (above) is "int",
both are constrained by the same mask (PSR_MODE_MASK | PSR_MODE32_BIT)

Steve

> +		__field(unsigned long,			hcr_el2)
> +	),
> +
> +	TP_fast_assign(
> +		__entry->vcpu = vcpu;
> +		__entry->esr_el2 = esr_el2;
> +		__entry->type = type;
> +		__entry->spsr_el2 = *vcpu_cpsr(vcpu);
> +		__entry->pc = *vcpu_pc(vcpu);
> +		__entry->source_mode = *vcpu_cpsr(vcpu) & (PSR_MODE_MASK | PSR_MODE32_BIT);
> +		__entry->hcr_el2 = __vcpu_sys_reg(vcpu, HCR_EL2);
> +	),
> +
> +	TP_printk("%s: esr_el2 0x%lx elr_el2: 0x%lx spsr_el2: 0x%08lx (M: %s) hcr_el2: %lx",
> +		  __print_symbolic(__entry->type, kvm_exception_type_names),
> +		  __entry->esr_el2, __entry->pc, __entry->spsr_el2,
> +		  __print_symbolic(__entry->source_mode, kvm_mode_names),
> +		  __entry->hcr_el2)
> +);
>  #endif /* _TRACE_ARM64_KVM_H */
>  
>  #undef TRACE_INCLUDE_PATH
> 


  reply index

Thread overview: 174+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-21  9:37 [PATCH 00/59] KVM: arm64: ARMv8.3 Nested Virtualization support Marc Zyngier
2019-06-21  9:37 ` [PATCH 01/59] KVM: arm64: Migrate _elx sysreg accessors to msr_s/mrs_s Marc Zyngier
2019-06-24 11:16   ` Dave Martin
2019-06-24 12:59   ` Alexandru Elisei
2019-07-03 12:32     ` Marc Zyngier
2019-06-21  9:37 ` [PATCH 02/59] KVM: arm64: Move __load_guest_stage2 to kvm_mmu.h Marc Zyngier
2019-06-24 11:19   ` Dave Martin
2019-07-03  9:30     ` Marc Zyngier
2019-07-03 16:13       ` Dave Martin
2019-06-21  9:37 ` [PATCH 03/59] arm64: Add ARM64_HAS_NESTED_VIRT cpufeature Marc Zyngier
2019-06-21 13:08   ` Julien Thierry
2019-06-21 13:22     ` Marc Zyngier
2019-06-21 13:44   ` Suzuki K Poulose
2019-06-24 11:24   ` Dave Martin
2019-06-21  9:37 ` [PATCH 04/59] KVM: arm64: nv: Introduce nested virtualization VCPU feature Marc Zyngier
2019-06-21 13:08   ` Julien Thierry
2019-06-24 11:28   ` Dave Martin
2019-07-03 11:53     ` Marc Zyngier
2019-07-03 16:27       ` Dave Martin
2019-06-24 11:43   ` Dave Martin
2019-07-03 11:56     ` Marc Zyngier
2019-07-03 16:24       ` Dave Martin
2019-06-21  9:37 ` [PATCH 05/59] KVM: arm64: nv: Reset VCPU to EL2 registers if VCPU nested virt is set Marc Zyngier
2019-06-24 10:19   ` Suzuki K Poulose
2019-06-24 11:38   ` Dave Martin
2019-06-21  9:37 ` [PATCH 06/59] KVM: arm64: nv: Allow userspace to set PSR_MODE_EL2x Marc Zyngier
2019-06-21 13:24   ` Julien Thierry
2019-06-21 13:50     ` Marc Zyngier
2019-06-24 12:48       ` Dave Martin
2019-07-03  9:21         ` Marc Zyngier
2019-07-04 10:00           ` Dave Martin
2019-06-21  9:37 ` [PATCH 07/59] KVM: arm64: nv: Add EL2 system registers to vcpu context Marc Zyngier
2019-06-24 12:54   ` Dave Martin
2019-07-03 12:20     ` Marc Zyngier
2019-07-03 16:31       ` Dave Martin
2019-06-24 15:47   ` Alexandru Elisei
2019-07-03 13:20     ` Marc Zyngier
2019-07-03 16:01       ` Marc Zyngier
2019-07-01 16:36   ` Suzuki K Poulose
2019-06-21  9:37 ` [PATCH 08/59] KVM: arm64: nv: Reset VMPIDR_EL2 and VPIDR_EL2 to sane values Marc Zyngier
2019-06-24 12:59   ` Dave Martin
2019-06-21  9:37 ` [PATCH 09/59] KVM: arm64: nv: Add nested virt VCPU primitives for vEL2 VCPU state Marc Zyngier
2019-06-24 13:08   ` Dave Martin
2019-06-21  9:37 ` [PATCH 10/59] KVM: arm64: nv: Support virtual EL2 exceptions Marc Zyngier
2019-07-08 13:56   ` Steven Price [this message]
2019-06-21  9:37 ` [PATCH 11/59] KVM: arm64: nv: Inject HVC exceptions to the virtual EL2 Marc Zyngier
2019-06-25 13:13   ` Alexandru Elisei
2019-07-03 14:16     ` Marc Zyngier
2019-07-30 14:08     ` Alexandru Elisei
2019-06-21  9:37 ` [PATCH 12/59] KVM: arm64: nv: Handle trapped ERET from " Marc Zyngier
2019-07-02 12:00   ` Alexandru Elisei
2019-06-21  9:37 ` [PATCH 13/59] KVM: arm64: nv: Handle virtual EL2 registers in vcpu_read/write_sys_reg() Marc Zyngier
2019-06-24 12:42   ` Julien Thierry
2019-06-25 14:02     ` Alexandru Elisei
2019-07-03 12:15     ` Marc Zyngier
2019-07-03 15:21       ` Julien Thierry
2019-06-25 15:18   ` Alexandru Elisei
2019-07-01  9:58     ` Alexandru Elisei
2019-07-03 15:59     ` Marc Zyngier
2019-07-03 16:32       ` Alexandru Elisei
2019-07-04 14:39         ` Marc Zyngier
2019-06-26 15:04   ` Alexandru Elisei
2019-07-04 15:05     ` Marc Zyngier
2019-07-01 12:10   ` Alexandru Elisei
2019-06-21  9:37 ` [PATCH 14/59] KVM: arm64: nv: Handle SPSR_EL2 specially Marc Zyngier
2019-06-21  9:37 ` [PATCH 15/59] KVM: arm64: nv: Refactor vcpu_{read,write}_sys_reg Marc Zyngier
2019-06-24 15:07   ` Julien Thierry
2019-07-03 13:09     ` Marc Zyngier
2019-06-27  9:21   ` Alexandru Elisei
2019-07-04 15:15     ` Marc Zyngier
2019-06-21  9:38 ` [PATCH 16/59] KVM: arm64: nv: Save/Restore vEL2 sysregs Marc Zyngier
2019-06-25  8:48   ` Julien Thierry
2019-07-03 13:42     ` Marc Zyngier
2019-07-01 12:09   ` Alexandru Elisei
2019-08-21 11:57   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 17/59] KVM: arm64: nv: Emulate PSTATE.M for a guest hypervisor Marc Zyngier
2019-06-21  9:38 ` [PATCH 18/59] KVM: arm64: nv: Trap EL1 VM register accesses in virtual EL2 Marc Zyngier
2019-07-01 16:12   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 19/59] KVM: arm64: nv: Trap SPSR_EL1, ELR_EL1 and VBAR_EL1 from " Marc Zyngier
2019-06-21  9:38 ` [PATCH 20/59] KVM: arm64: nv: Trap CPACR_EL1 access in " Marc Zyngier
2019-07-01 16:40   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 21/59] KVM: arm64: nv: Set a handler for the system instruction traps Marc Zyngier
2019-06-25 12:55   ` Julien Thierry
2019-07-03 14:15     ` Marc Zyngier
2019-06-21  9:38 ` [PATCH 22/59] KVM: arm64: nv: Handle PSCI call via smc from the guest Marc Zyngier
2019-06-21  9:38 ` [PATCH 23/59] KVM: arm64: nv: Respect virtual HCR_EL2.TWX setting Marc Zyngier
2019-06-25 14:19   ` Julien Thierry
2019-07-02 12:54     ` Alexandru Elisei
2019-07-03 14:18     ` Marc Zyngier
2019-06-21  9:38 ` [PATCH 24/59] KVM: arm64: nv: Respect virtual CPTR_EL2.TFP setting Marc Zyngier
2019-06-21  9:38 ` [PATCH 25/59] KVM: arm64: nv: Don't expose SVE to nested guests Marc Zyngier
2019-06-21  9:38 ` [PATCH 26/59] KVM: arm64: nv: Respect the virtual HCR_EL2.NV bit setting Marc Zyngier
2019-06-26  5:31   ` Julien Thierry
2019-07-03 16:31     ` Marc Zyngier
2019-06-21  9:38 ` [PATCH 27/59] KVM: arm64: nv: Respect virtual HCR_EL2.TVM and TRVM settings Marc Zyngier
2019-06-26  6:55   ` Julien Thierry
2019-07-04 14:57     ` Marc Zyngier
2019-06-21  9:38 ` [PATCH 28/59] KVM: arm64: nv: Respect the virtual HCR_EL2.NV1 bit setting Marc Zyngier
2019-06-26  7:23   ` Julien Thierry
2019-07-02 16:32   ` Alexandru Elisei
2019-07-03  9:10     ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 29/59] KVM: arm64: nv: Emulate EL12 register accesses from the virtual EL2 Marc Zyngier
2019-07-03  9:16   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 30/59] KVM: arm64: nv: Configure HCR_EL2 for nested virtualization Marc Zyngier
2019-06-21  9:38 ` [PATCH 31/59] KVM: arm64: nv: Only toggle cache for virtual EL2 when SCTLR_EL2 changes Marc Zyngier
2019-06-21  9:38 ` [PATCH 32/59] KVM: arm64: nv: Hide RAS from nested guests Marc Zyngier
2019-07-03 13:59   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 33/59] KVM: arm64: nv: Pretend we only support larger-than-host page sizes Marc Zyngier
2019-07-03 14:13   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 34/59] KVM: arm/arm64: nv: Factor out stage 2 page table data from struct kvm Marc Zyngier
2019-07-03 15:52   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 35/59] KVM: arm/arm64: nv: Support multiple nested stage 2 mmu structures Marc Zyngier
2019-06-25 12:19   ` Alexandru Elisei
2019-07-03 13:47     ` Marc Zyngier
2019-06-27 13:15   ` Julien Thierry
2019-07-04 15:51   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 36/59] KVM: arm64: nv: Implement nested Stage-2 page table walk logic Marc Zyngier
2019-06-21  9:38 ` [PATCH 37/59] KVM: arm64: nv: Handle shadow stage 2 page faults Marc Zyngier
2019-07-05 14:28   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 38/59] KVM: arm64: nv: Unmap/flush shadow stage 2 page tables Marc Zyngier
2019-07-01  8:03   ` Julien Thierry
2019-06-21  9:38 ` [PATCH 39/59] KVM: arm64: nv: Move last_vcpu_ran to be per s2 mmu Marc Zyngier
2019-07-01  9:10   ` Julien Thierry
2019-07-05 15:28   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 40/59] KVM: arm64: nv: Don't always start an S2 MMU search from the beginning Marc Zyngier
2019-07-09  9:59   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 41/59] KVM: arm64: nv: Introduce sys_reg_desc.forward_trap Marc Zyngier
2019-06-21  9:38 ` [PATCH 42/59] KVM: arm64: nv: Rework the system instruction emulation framework Marc Zyngier
2019-06-21  9:38 ` [PATCH 43/59] KVM: arm64: nv: Trap and emulate AT instructions from virtual EL2 Marc Zyngier
2019-07-01 15:45   ` Julien Thierry
2019-07-09 13:20   ` Alexandru Elisei
2019-07-18 12:13     ` Tomasz Nowicki
     [not found]       ` <6537c8d2-3bda-788e-8861-b70971a625cb@arm.com>
2019-07-18 12:59         ` Tomasz Nowicki
2019-07-24 10:25   ` Tomasz Nowicki
2019-07-24 12:39     ` Marc Zyngier
2019-07-24 13:56       ` Tomasz Nowicki
2019-06-21  9:38 ` [PATCH 44/59] KVM: arm64: nv: Trap and emulate TLBI " Marc Zyngier
2019-07-02 12:37   ` Julien Thierry
2019-07-10 10:15   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 45/59] KVM: arm64: nv: Handle traps for timer _EL02 and _EL2 sysregs accessors Marc Zyngier
2019-06-21  9:38 ` [PATCH 46/59] KVM: arm64: nv: arch_timer: Support hyp timer emulation Marc Zyngier
2019-07-10 16:23   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 47/59] KVM: arm64: nv: Propagate CNTVOFF_EL2 to the virtual EL1 timer Marc Zyngier
2019-08-08  9:34   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 48/59] KVM: arm64: nv: Load timer before the GIC Marc Zyngier
2019-07-11 13:17   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 49/59] KVM: arm64: nv: vgic-v3: Take cpu_if pointer directly instead of vcpu Marc Zyngier
2019-06-21  9:38 ` [PATCH 50/59] KVM: arm64: nv: Nested GICv3 Support Marc Zyngier
2019-07-16 11:41   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 51/59] KVM: arm64: nv: vgic: Emulate the HW bit in software Marc Zyngier
2019-06-21  9:38 ` [PATCH 52/59] KVM: arm64: nv: vgic: Allow userland to set VGIC maintenance IRQ Marc Zyngier
2019-07-04  7:38   ` Julien Thierry
2019-07-04  9:01     ` Andre Przywara
2019-07-04  9:04       ` Julien Thierry
2019-06-21  9:38 ` [PATCH 53/59] KVM: arm64: nv: Implement maintenance interrupt forwarding Marc Zyngier
2019-07-04  8:06   ` Julien Thierry
2019-07-16 16:35   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 54/59] KVM: arm64: nv: Add nested GICv3 tracepoints Marc Zyngier
2019-06-21  9:38 ` [PATCH 55/59] arm64: KVM: nv: Add handling of EL2-specific timer registers Marc Zyngier
2019-07-11 12:35   ` Alexandru Elisei
2019-07-17 10:19   ` Alexandru Elisei
2019-06-21  9:38 ` [PATCH 56/59] arm64: KVM: nv: Honor SCTLR_EL2.SPAN on entering vEL2 Marc Zyngier
2019-06-21  9:38 ` [PATCH 57/59] arm64: KVM: nv: Handle SCTLR_EL2 RES0/RES1 bits Marc Zyngier
2019-06-21  9:38 ` [PATCH 58/59] arm64: KVM: nv: Restrict S2 RD/WR permissions to match the guest's Marc Zyngier
2019-06-21  9:38 ` [PATCH 59/59] arm64: KVM: nv: Allow userspace to request KVM_ARM_VCPU_NESTED_VIRT Marc Zyngier
     [not found] ` <CANW9uyssDm_0ysC_pnvhHRrnsmFZik+3_ENmFz7L2GCmtH09fw@mail.gmail.com>
2019-06-21 11:21   ` [PATCH 00/59] KVM: arm64: ARMv8.3 Nested Virtualization support Marc Zyngier
2019-08-02 10:11 ` Alexandru Elisei
2019-08-02 10:30   ` Andrew Jones
2019-08-09 10:01   ` Alexandru Elisei
2019-08-09 11:44     ` Andrew Jones
2019-08-09 12:00       ` Alexandru Elisei
2019-08-09 13:00         ` Andrew Jones
2019-08-22 11:57     ` Alexandru Elisei
2019-08-22 15:32       ` Alexandru Elisei

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