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| author | Fuad Tabba <fuad.tabba@linux.dev> | 2026-09-22 19:14:30 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2026-09-23 12:34:30 +0000 |
| commit | 2bc6b218717b9d08f466f88209251d54bc09b207 (patch) | |
| tree | cb91c941eccb15f94cbec4e96aa3a9c8736b5d66 /Documentation/input/interactive.svg | |
| download | linux-stable-2bc6b218717b9d08f466f88209251d54bc09b207.tar.gz linux-stable-2bc6b218717b9d08f466f88209251d54bc09b207.zip | |
arm64/boot: Disable trapping of PMZR_EL0 writes to EL2grafted
__init_el2_fgt2() writes one mask to both HDFGRTR2_EL2 and HDFGWTR2_EL2.
PMZR_EL0 is write-only, so its trap bit, nPMZR_EL0, exists only in
HDFGWTR2_EL2 and is therefore never set: a PMZR_EL0 write from the host
traps to EL2, where the nVHE hypervisor has no handler and BUG()s. The
kernel never writes PMZR_EL0, but kernel.perf_user_access=1 has the PMU
driver set PMUSERENR_EL0.UEN for a task with a user-read event, so a
write from EL0 reaches the trap and takes the host down without a panic
message.
Accumulate the HDFGWTR2_EL2 bits separately, as __init_el2_fgt() already
does for HDFGWTR_EL2, and set nPMZR_EL0 with the other FEAT_PMUv3p9
bits.
Fixes: 858c7bfcb35e1 ("arm64/boot: Enable EL2 requirements for FEAT_PMUv3p9")
Cc: stable@vger.kernel.org
Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Oliver Upton <oupton@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'Documentation/input/interactive.svg')
| -rw-r--r-- | Documentation/input/interactive.svg | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/input/interactive.svg b/Documentation/input/interactive.svg new file mode 100644 index 000000000..a3513709a --- /dev/null +++ b/Documentation/input/interactive.svg @@ -0,0 +1,24 @@ +<svg width="5.75in" height="3.90in" version="1.1" viewBox="1178 3138 6779.9424 4671.3427" xmlns="http://www.w3.org/2000/svg"> + <polyline transform="translate(-18.5,-16.294)" points="1200 3600 1800 3600 2400 4800 3e3 4800 4200 5700 4800 5700" fill="none" stroke="#000" stroke-width="15"/> + <rect x="1181.5" y="3133.7" width="3600" height="3150" rx="0" fill="none" stroke="#000" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="1200 4800 4800 4800" fill="none" stroke="#000" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="2400 4800 2400 6525 1950 7125 1950 7800" fill="none" stroke="#000" stroke-dasharray="40, 40" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="3e3 4800 3e3 6525 3600 7125 3600 7800" fill="none" stroke="#000" stroke-dasharray="40, 40" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="3837 5389 4125 5100 5400 5100" fill="none" stroke="#000" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="3889 5292 3826 5398 3932 5334" fill="none" stroke="#000" stroke-miterlimit="8" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="2112 4189 2400 3900 5400 3900" fill="none" stroke="#000" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="2164 4092 2101 4198 2207 4134" fill="none" stroke="#000" stroke-miterlimit="8" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="4800 5700 5400 5700" fill="none" stroke="#000" stroke-dasharray="40, 40" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="1800 3600 5400 3600" fill="none" stroke="#000" stroke-dasharray="40, 40" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="2700 4784 2700 4425 5400 4425" fill="none" stroke="#000" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="2670 4678 2700 4798 2730 4678" fill="none" stroke="#000" stroke-miterlimit="8" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="1967 7800 3583 7800" fill="none" stroke="#000" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="3478 7830 3598 7800 3478 7770" fill="none" stroke="#000" stroke-miterlimit="8" stroke-width="7"/> + <polyline transform="translate(-18.5,-16.294)" points="2072 7770 1952 7800 2072 7830" fill="none" stroke="#000" stroke-miterlimit="8" stroke-width="7"/> + <text x="2775" y="7725" font-family="sans-serif" font-size="144px" stroke="#000000" stroke-width=".025in" text-anchor="middle" xml:space="preserve">Dead band</text> + <text x="5400" y="5700" font-family="sans-serif" font-size="144px" stroke="#000000" stroke-width=".025in" xml:space="preserve">right saturation</text> + <text x="5400" y="3600" font-family="sans-serif" font-size="144px" stroke="#000000" stroke-width=".025in" xml:space="preserve">left saturation</text> + <text x="5400" y="3900" font-family="sans-serif" font-size="144px" stroke="#000000" stroke-width=".025in" xml:space="preserve">left coeff ( positive in that case )</text> + <text x="5475" y="5100" font-family="sans-serif" font-size="144px" stroke="#000000" stroke-width=".025in" xml:space="preserve">right coeff ( negative in that case )</text> + <text x="5400" y="4425" font-family="sans-serif" font-size="144px" stroke="#000000" stroke-width=".025in" xml:space="preserve">center</text> +</svg> |