path: root/arch/powerpc/include/asm
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authorOliver O'Halloran <oohall@gmail.com>2019-01-31 12:53:47 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2019-02-01 10:13:51 +1100
commit5a3840a470c41ec0b85cd36ca80370330656b163 (patch)
tree94a15b3b0f571febd9d1a039d31f1235ffc22d1e /arch/powerpc/include/asm
parent579b9239c1f38665b21e8d0e6ee83ecc96dbd6bb (diff)
powerpc/papr_scm: Use the correct bind address
When binding an SCM volume to a physical address the hypervisor has the option to return early with a continue token with the expectation that the guest will resume the bind operation until it completes. A quirk of this interface is that the bind address will only be returned by the first bind h-call and the subsequent calls will return 0xFFFF_FFFF_FFFF_FFFF for the bind address. We currently do not save the address returned by the first h-call. As a result we will use the junk address as the base of the bound region if the hypervisor decides to split the bind across multiple h-calls. This bug was found when testing with very large SCM volumes where the bind process would take more time than they hypervisor's internal h-call time limit would allow. This patch fixes the issue by saving the bind address from the first call. Cc: stable@vger.kernel.org Fixes: b5beae5e224f ("powerpc/pseries: Add driver for PAPR SCM regions") Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm')
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