Re: [PATCH v2 12/26] KVM: arm64: nv: Add FGT registers

On 28 Jul 2023, at 08:29, Marc Zyngier [off-list ref] wrote:

Add the 5 registers covering FEAT_FGT. The AMU-related registers
are currently left out as we don't have a plan for them. Yet.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/include/asm/kvm_host.h | 5 +++++
arch/arm64/kvm/sys_regs.c         | 5 +++++
2 files changed, 10 insertions(+)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index d3dd05bbfe23..721680da1011 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h

@@ -400,6 +400,11 @@ enum vcpu_sysreg {

TPIDR_EL2, /* EL2 Software Thread ID Register */
CNTHCTL_EL2, /* Counter-timer Hypervisor Control register */
SP_EL2, /* EL2 Stack Pointer */
+ HFGRTR_EL2,
+ HFGWTR_EL2,
+ HFGITR_EL2,
+ HDFGRTR_EL2,
+ HDFGWTR_EL2,
CNTHP_CTL_EL2,
CNTHP_CVAL_EL2,
CNTHV_CTL_EL2,

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 38f221f9fc98..f5baaa508926 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c

@@ -2367,6 +2367,9 @@ static const struct sys_reg_desc sys_reg_descs[] = {

EL2_REG(MDCR_EL2, access_rw, reset_val, 0),
EL2_REG(CPTR_EL2, access_rw, reset_val, CPTR_NVHE_EL2_RES1),
EL2_REG(HSTR_EL2, access_rw, reset_val, 0),
+ EL2_REG(HFGRTR_EL2, access_rw, reset_val, 0),
+ EL2_REG(HFGWTR_EL2, access_rw, reset_val, 0),
+ EL2_REG(HFGITR_EL2, access_rw, reset_val, 0),
EL2_REG(HACR_EL2, access_rw, reset_val, 0),

EL2_REG(TTBR0_EL2, access_rw, reset_val, 0),

@@ -2376,6 +2379,8 @@ static const struct sys_reg_desc sys_reg_descs[] = {

EL2_REG(VTCR_EL2, access_rw, reset_val, 0),

{ SYS_DESC(SYS_DACR32_EL2), NULL, reset_unknown, DACR32_EL2 },
+ EL2_REG(HDFGRTR_EL2, access_rw, reset_val, 0),
+ EL2_REG(HDFGWTR_EL2, access_rw, reset_val, 0),