diff options
| author | Oliver Upton <oliver.upton@linux.dev> | 2025-03-19 14:53:09 -0700 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2025-03-19 14:53:16 -0700 |
| commit | d300b0168ea8fd5022a1413bd37ab63f4e5a7d4d (patch) | |
| tree | aa9e431f8b5db99e1a3c70dcec6c451108f1c62a /drivers/hwtracing | |
| parent | 13f64f6d215ca229a615ef26cf452e38e22f4cdb (diff) | |
| parent | 44ff44cadbd144ee1159f5687a852c49c4290262 (diff) | |
Merge branch 'kvm-arm64/pv-cpuid' into kvmarm/next
* kvm-arm64/pv-cpuid:
: Paravirtualized implementation ID, courtesy of Shameer Kolothum
:
: Big-little has historically been a pain in the ass to virtualize. The
: implementation ID (MIDR, REVIDR, AIDR) of a vCPU can change at the whim
: of vCPU scheduling. This can be particularly annoying when the guest
: needs to know the underlying implementation to mitigate errata.
:
: "Hyperscalers" face a similar scheduling problem, where VMs may freely
: migrate between hosts in a pool of heterogenous hardware. And yes, our
: server-class friends are equally riddled with errata too.
:
: In absence of an architected solution to this wart on the ecosystem,
: introduce support for paravirtualizing the implementation exposed
: to a VM, allowing the VMM to describe the pool of implementations that a
: VM may be exposed to due to scheduling/migration.
:
: Userspace is expected to intercept and handle these hypercalls using the
: SMCCC filter UAPI, should it choose to do so.
smccc: kvm_guest: Fix kernel builds for 32 bit arm
KVM: selftests: Add test for KVM_REG_ARM_VENDOR_HYP_BMAP_2
smccc/kvm_guest: Enable errata based on implementation CPUs
arm64: Make _midr_in_range_list() an exported function
KVM: arm64: Introduce KVM_REG_ARM_VENDOR_HYP_BMAP_2
KVM: arm64: Specify hypercall ABI for retrieving target implementations
arm64: Modify _midr_range() functions to read MIDR/REVIDR internally
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'drivers/hwtracing')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm4x-core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c index 2c1a60577728..3d98e3371fff 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c @@ -1216,7 +1216,7 @@ static void etm4_fixup_wrong_ccitmin(struct etmv4_drvdata *drvdata) * recorded value for 'drvdata->ccitmin' to workaround * this problem. */ - if (is_midr_in_range_list(read_cpuid_id(), etm_wrong_ccitmin_cpus)) { + if (is_midr_in_range_list(etm_wrong_ccitmin_cpus)) { if (drvdata->ccitmin == 256) drvdata->ccitmin = 4; } |