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| author | Nathan Lynch <nathanl@linux.ibm.com> | 2023-02-10 12:42:03 -0600 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-02-13 22:35:03 +1100 |
| commit | b8dc71774a51182185ae197ed2f8bd085ce6c848 (patch) | |
| tree | eef55ccad46846f52737df23562aeff5ae8071fd /arch/powerpc | |
| parent | 419e27f32b6dc13c3e6f443d1ad104f2845c444b (diff) | |
| download | linux-b8dc71774a51182185ae197ed2f8bd085ce6c848.tar.gz linux-b8dc71774a51182185ae197ed2f8bd085ce6c848.tar.bz2 linux-b8dc71774a51182185ae197ed2f8bd085ce6c848.zip | |
powerpc/pseries: convert CMO probe to papr_sysparm API
Convert the direct invocation of the ibm,get-system-parameter RTAS
function to papr_sysparm_get().
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230125-b4-powerpc-rtas-queue-v3-15-26929c8cce78@linux.ibm.com
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 23 |
1 files changed, 6 insertions, 17 deletions
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 74e50b6b28d4..420a2fa48292 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -57,6 +57,7 @@ #include <asm/pmc.h> #include <asm/xics.h> #include <asm/xive.h> +#include <asm/papr-sysparm.h> #include <asm/ppc-pci.h> #include <asm/i8259.h> #include <asm/udbg.h> @@ -941,32 +942,21 @@ void pSeries_coalesce_init(void) */ static void __init pSeries_cmo_feature_init(void) { - const s32 token = rtas_token("ibm,get-system-parameter"); + static struct papr_sysparm_buf buf __initdata; + static_assert(sizeof(buf.val) >= CMO_MAXLENGTH); char *ptr, *key, *value, *end; - int call_status; int page_order = IOMMU_PAGE_SHIFT_4K; pr_debug(" -> fw_cmo_feature_init()\n"); - do { - spin_lock(&rtas_data_buf_lock); - call_status = rtas_call(token, 3, 1, NULL, - CMO_CHARACTERISTICS_TOKEN, - __pa(rtas_data_buf), - RTAS_DATA_BUF_SIZE); - if (call_status == 0) - break; - spin_unlock(&rtas_data_buf_lock); - } while (rtas_busy_delay(call_status)); - - if (call_status != 0) { + if (papr_sysparm_get(PAPR_SYSPARM_COOP_MEM_OVERCOMMIT_ATTRS, &buf)) { pr_debug("CMO not available\n"); pr_debug(" <- fw_cmo_feature_init()\n"); return; } - end = rtas_data_buf + CMO_MAXLENGTH - 2; - ptr = rtas_data_buf + 2; /* step over strlen value */ + end = &buf.val[CMO_MAXLENGTH]; + ptr = &buf.val[0]; key = value = ptr; while (*ptr && (ptr <= end)) { @@ -1012,7 +1002,6 @@ static void __init pSeries_cmo_feature_init(void) } else pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, CMO_SecPSP); - spin_unlock(&rtas_data_buf_lock); pr_debug(" <- fw_cmo_feature_init()\n"); } |