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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-07-18 16:53:38 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-07-18 16:53:38 +0200 |
| commit | 5895db67c12464003afd16c08049b73aa09e58ea (patch) | |
| tree | c3855a7ab889dffc2a02460f65abbbe6b800b6e6 /drivers/acpi/cppc_acpi.c | |
| parent | 1c5f3df9481bb6275aeb079a8312d037da69715b (diff) | |
| parent | f89c296854b755a66657065c35b05406fc18264d (diff) | |
Merge v6.18.39linux-rolling-lts
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/acpi/cppc_acpi.c')
| -rw-r--r-- | drivers/acpi/cppc_acpi.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index ad763a5bf3af..60d2548f0eea 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -185,8 +185,13 @@ show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, nominal_freq); show_cppc_data(cppc_get_perf_ctrs, cppc_perf_fb_ctrs, reference_perf); show_cppc_data(cppc_get_perf_ctrs, cppc_perf_fb_ctrs, wraparound_time); -/* Check for valid access_width, otherwise, fallback to using bit_width */ -#define GET_BIT_WIDTH(reg) ((reg)->access_width ? (8 << ((reg)->access_width - 1)) : (reg)->bit_width) +/* + * PCC reuses the access_width field as the subspace id, so only decode access + * size for non-PCC registers. Otherwise, use the bit_width. + */ +#define GET_BIT_WIDTH(reg) (((reg)->access_width && \ + (reg)->space_id != ACPI_ADR_SPACE_PLATFORM_COMM) ? \ + (8 << ((reg)->access_width - 1)) : (reg)->bit_width) /* Shift and apply the mask for CPC reads/writes */ #define MASK_VAL_READ(reg, val) (((val) >> (reg)->bit_offset) & \ @@ -1036,7 +1041,6 @@ static int cpc_read(int cpu, struct cpc_register_resource *reg_res, u64 *val) * by the bit width field; the access size is used to indicate * the PCC subspace id. */ - size = reg->bit_width; vaddr = GET_PCC_VADDR(reg->address, pcc_ss_id); } else if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) @@ -1109,7 +1113,6 @@ static int cpc_write(int cpu, struct cpc_register_resource *reg_res, u64 val) * by the bit width field; the access size is used to indicate * the PCC subspace id. */ - size = reg->bit_width; vaddr = GET_PCC_VADDR(reg->address, pcc_ss_id); } else if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |