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Merge tag 'kvmarm-6.17' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

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KVM/arm64 changes for 6.17, round #1

 - Host driver for GICv5, the next generation interrupt controller for
   arm64, including support for interrupt routing, MSIs, interrupt
   translation and wired interrupts.

 - Use FEAT_GCIE_LEGACY on GICv5 systems to virtualize GICv3 VMs on
   GICv5 hardware, leveraging the legacy VGIC interface.

 - Userspace control of the 'nASSGIcap' GICv3 feature, allowing
   userspace to disable support for SGIs w/o an active state on hardware
   that previously advertised it unconditionally.

 - Map supporting endpoints with cacheable memory attributes on systems
   with FEAT_S2FWB and DIC where KVM no longer needs to perform cache
   maintenance on the address range.

 - Nested support for FEAT_RAS and FEAT_DoubleFault2, allowing the guest
   hypervisor to inject external aborts into an L2 VM and take traps of
   masked external aborts to the hypervisor.

 - Convert more system register sanitization to the config-driven
   implementation.

 - Fixes to the visibility of EL2 registers, namely making VGICv3 system
   registers accessible through the VGIC device instead of the ONE_REG
   vCPU ioctls.

 - Various cleanups and minor fixes.
This commit is contained in:
Paolo Bonzini
2025-07-29 12:27:40 -04:00
parent beafd7ecf2 18ec25dd0e
commit 314b40b3b6
80 changed files with 7589 additions and 681 deletions
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36
arch/arm64/include/asm/kvm_host.h
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@@ -523,6 +523,7 @@ enum vcpu_sysreg {
/* Anything from this can be RES0/RES1 sanitised */
MARKER(__SANITISED_REG_START__),
TCR2_EL2, /* Extended Translation Control Register (EL2) */
SCTLR2_EL2, /* System Control Register 2 (EL2) */
MDCR_EL2, /* Monitor Debug Configuration Register (EL2) */
CNTHCTL_EL2, /* Counter-timer Hypervisor Control register */
@@ -537,6 +538,7 @@ enum vcpu_sysreg {
VNCR(TTBR1_EL1),/* Translation Table Base Register 1 */
VNCR(TCR_EL1), /* Translation Control Register */
VNCR(TCR2_EL1), /* Extended Translation Control Register */
VNCR(SCTLR2_EL1), /* System Control Register 2 */
VNCR(ESR_EL1), /* Exception Syndrome Register */
VNCR(AFSR0_EL1),/* Auxiliary Fault Status Register 0 */
VNCR(AFSR1_EL1),/* Auxiliary Fault Status Register 1 */
@@ -565,6 +567,10 @@ enum vcpu_sysreg {
VNCR(POR_EL1), /* Permission Overlay Register 1 (EL1) */
/* FEAT_RAS registers */
VNCR(VDISR_EL2),
VNCR(VSESR_EL2),
VNCR(HFGRTR_EL2),
VNCR(HFGWTR_EL2),
VNCR(HFGITR_EL2),
@@ -817,7 +823,7 @@ struct kvm_vcpu_arch {
u8 iflags;
/* State flags for kernel bookkeeping, unused by the hypervisor code */
u8 sflags;
u16 sflags;
/*
* Don't run the guest (internal implementation need).
@@ -953,9 +959,21 @@ struct kvm_vcpu_arch {
__vcpu_flags_preempt_enable(); \
} while (0)
#define __vcpu_test_and_clear_flag(v, flagset, f, m) \
({ \
typeof(v->arch.flagset) set; \
\
set = __vcpu_get_flag(v, flagset, f, m); \
__vcpu_clear_flag(v, flagset, f, m); \
\
set; \
})
#define vcpu_get_flag(v, ...) __vcpu_get_flag((v), __VA_ARGS__)
#define vcpu_set_flag(v, ...) __vcpu_set_flag((v), __VA_ARGS__)
#define vcpu_clear_flag(v, ...) __vcpu_clear_flag((v), __VA_ARGS__)
#define vcpu_test_and_clear_flag(v, ...) \
__vcpu_test_and_clear_flag((v), __VA_ARGS__)
/* KVM_ARM_VCPU_INIT completed */
#define VCPU_INITIALIZED __vcpu_single_flag(cflags, BIT(0))
@@ -1015,6 +1033,8 @@ struct kvm_vcpu_arch {
#define IN_WFI __vcpu_single_flag(sflags, BIT(6))
/* KVM is currently emulating a nested ERET */
#define IN_NESTED_ERET __vcpu_single_flag(sflags, BIT(7))
/* SError pending for nested guest */
#define NESTED_SERROR_PENDING __vcpu_single_flag(sflags, BIT(8))
/* Pointer to the vcpu's SVE FFR for sve_{save,load}_state() */
@@ -1149,6 +1169,8 @@ static inline bool __vcpu_read_sys_reg_from_cpu(int reg, u64 *val)
* System registers listed in the switch are not saved on every
* exit from the guest but are only saved on vcpu_put.
*
* SYSREGS_ON_CPU *MUST* be checked before using this helper.
*
* Note that MPIDR_EL1 for the guest is set by KVM via VMPIDR_EL2 but
* should never be listed below, because the guest cannot modify its
* own MPIDR_EL1 and MPIDR_EL1 is accessed for VCPU A from VCPU B's
@@ -1186,6 +1208,7 @@ static inline bool __vcpu_read_sys_reg_from_cpu(int reg, u64 *val)
case IFSR32_EL2: *val = read_sysreg_s(SYS_IFSR32_EL2); break;
case DBGVCR32_EL2: *val = read_sysreg_s(SYS_DBGVCR32_EL2); break;
case ZCR_EL1: *val = read_sysreg_s(SYS_ZCR_EL12); break;
case SCTLR2_EL1: *val = read_sysreg_s(SYS_SCTLR2_EL12); break;
default: return false;
}
@@ -1200,6 +1223,8 @@ static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg)
* System registers listed in the switch are not restored on every
* entry to the guest but are only restored on vcpu_load.
*
* SYSREGS_ON_CPU *MUST* be checked before using this helper.
*
* Note that MPIDR_EL1 for the guest is set by KVM via VMPIDR_EL2 but
* should never be listed below, because the MPIDR should only be set
* once, before running the VCPU, and never changed later.
@@ -1236,6 +1261,7 @@ static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg)
case IFSR32_EL2: write_sysreg_s(val, SYS_IFSR32_EL2); break;
case DBGVCR32_EL2: write_sysreg_s(val, SYS_DBGVCR32_EL2); break;
case ZCR_EL1: write_sysreg_s(val, SYS_ZCR_EL12); break;
case SCTLR2_EL1: write_sysreg_s(val, SYS_SCTLR2_EL12); break;
default: return false;
}
@@ -1387,8 +1413,6 @@ static inline bool kvm_arm_is_pvtime_enabled(struct kvm_vcpu_arch *vcpu_arch)
return (vcpu_arch->steal.base != INVALID_GPA);
}
void kvm_set_sei_esr(struct kvm_vcpu *vcpu, u64 syndrome);
struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
DECLARE_KVM_HYP_PER_CPU(struct kvm_host_data, kvm_host_data);
@@ -1665,6 +1689,12 @@ void kvm_set_vm_id_reg(struct kvm *kvm, u32 reg, u64 val);
#define kvm_has_s1poe(k) \
(kvm_has_feat((k), ID_AA64MMFR3_EL1, S1POE, IMP))
#define kvm_has_ras(k) \
(kvm_has_feat((k), ID_AA64PFR0_EL1, RAS, IMP))
#define kvm_has_sctlr2(k) \
(kvm_has_feat((k), ID_AA64MMFR3_EL1, SCTLRX, IMP))
static inline bool kvm_arch_has_irq_bypass(void)
{
return true;