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author | Oliver Upton <oliver.upton@linux.dev> | 2023-02-14 01:32:14 +0300 |
---|---|---|
committer | Oliver Upton <oliver.upton@linux.dev> | 2023-02-14 01:32:40 +0300 |
commit | e8789ab7047a824fa415948d511634fea0c3aea3 (patch) | |
tree | 35d57257a8d1b28fb1fe734fc3fde8c36802f2db /arch/arm64/include/asm/kvm_host.h | |
parent | 619cec00857f21dbc6db5ef9e0b9c613479f3745 (diff) | |
parent | 5f623a598d128dacadf95c9d14f7c8b1313a3dc4 (diff) | |
download | linux-e8789ab7047a824fa415948d511634fea0c3aea3.tar.xz |
Merge branch kvm-arm64/virtual-cache-geometry into kvmarm/next
* kvm-arm64/virtual-cache-geometry:
: Virtualized cache geometry for KVM guests, courtesy of Akihiko Odaki.
:
: KVM/arm64 has always exposed the host cache geometry directly to the
: guest, even though non-secure software should never perform CMOs by
: Set/Way. This was slightly wrong, as the cache geometry was derived from
: the PE on which the vCPU thread was running and not a sanitized value.
:
: All together this leads to issues migrating VMs on heterogeneous
: systems, as the cache geometry saved/restored could be inconsistent.
:
: KVM/arm64 now presents 1 level of cache with 1 set and 1 way. The cache
: geometry is entirely controlled by userspace, such that migrations from
: older kernels continue to work.
KVM: arm64: Mark some VM-scoped allocations as __GFP_ACCOUNT
KVM: arm64: Normalize cache configuration
KVM: arm64: Mask FEAT_CCIDX
KVM: arm64: Always set HCR_TID2
arm64/cache: Move CLIDR macro definitions
arm64/sysreg: Add CCSIDR2_EL1
arm64/sysreg: Convert CCSIDR_EL1 to automatic generation
arm64: Allow the definition of UNKNOWN system register fields
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'arch/arm64/include/asm/kvm_host.h')
-rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 113e20fdbb56..82fdd26b6597 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -252,6 +252,7 @@ struct kvm_vcpu_fault_info { enum vcpu_sysreg { __INVALID_SYSREG__, /* 0 is reserved as an invalid value */ MPIDR_EL1, /* MultiProcessor Affinity Register */ + CLIDR_EL1, /* Cache Level ID Register */ CSSELR_EL1, /* Cache Size Selection Register */ SCTLR_EL1, /* System Control Register */ ACTLR_EL1, /* Auxiliary Control Register */ @@ -501,6 +502,9 @@ struct kvm_vcpu_arch { u64 last_steal; gpa_t base; } steal; + + /* Per-vcpu CCSIDR override or NULL */ + u32 *ccsidr; }; /* @@ -705,7 +709,6 @@ static inline bool __vcpu_read_sys_reg_from_cpu(int reg, u64 *val) return false; switch (reg) { - case CSSELR_EL1: *val = read_sysreg_s(SYS_CSSELR_EL1); break; case SCTLR_EL1: *val = read_sysreg_s(SYS_SCTLR_EL12); break; case CPACR_EL1: *val = read_sysreg_s(SYS_CPACR_EL12); break; case TTBR0_EL1: *val = read_sysreg_s(SYS_TTBR0_EL12); break; @@ -750,7 +753,6 @@ static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg) return false; switch (reg) { - case CSSELR_EL1: write_sysreg_s(val, SYS_CSSELR_EL1); break; case SCTLR_EL1: write_sysreg_s(val, SYS_SCTLR_EL12); break; case CPACR_EL1: write_sysreg_s(val, SYS_CPACR_EL12); break; case TTBR0_EL1: write_sysreg_s(val, SYS_TTBR0_EL12); break; |