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Sampat" , mcgrof@kernel.org, russ.weight@linux.dev, dakr@kernel.org, ashish.kalra@amd.com, herbert@gondor.apana.org.au, davem@davemloft.net Cc: linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org, rafael@kernel.org, chao.gao@intel.com, aik@amd.com, tycho@kernel.org, nikunj@amd.com, michael.roth@amd.com, shansinha@google.com References: From: Tom Lendacky Content-Language: en-US Autocrypt: addr=thomas.lendacky@amd.com; keydata= xsFNBFaNZYkBEADxg5OW/ajpUG7zgnUQPsMqWPjeAxtu4YH3lCUjWWcbUgc2qDGAijsLTFv1 kEbaJdblwYs28z3chM7QkfCGMSM29JWR1fSwPH18WyAA84YtxfPD8bfb1Exwo0CRw1RLRScn 6aJhsZJFLKyVeaPO1eequEsFQurRhLyAfgaH9iazmOVZZmxsGiNRJkQv4YnM2rZYi+4vWnxN 1ebHf4S1puN0xzQsULhG3rUyV2uIsqBFtlxZ8/r9MwOJ2mvyTXHzHdJBViOalZAUo7VFt3Fb aNkR5OR65eTL0ViQiRgFfPDBgkFCSlaxZvc7qSOcrhol160bK87qn0SbYLfplwiXZY/b/+ez 0zBtIt+uhZJ38HnOLWdda/8kuLX3qhGL5aNz1AeqcE5TW4D8v9ndYeAXFhQI7kbOhr0ruUpA udREH98EmVJsADuq0RBcIEkojnme4wVDoFt1EG93YOnqMuif76YGEl3iv9tYcESEeLNruDN6 LDbE8blkR3151tdg8IkgREJ+dK+q0p9UsGfdd+H7pni6Jjcxz8mjKCx6wAuzvArA0Ciq+Scg hfIgoiYQegZjh2vF2lCUzWWatXJoy7IzeAB5LDl/E9vz72cVD8CwQZoEx4PCsHslVpW6A/6U NRAz6ShU77jkoYoI4hoGC7qZcwy84mmJqRygFnb8dOjHI1KxqQARAQABzSZUb20gTGVuZGFj a3kgPHRob21hcy5sZW5kYWNreUBhbWQuY29tPsLBmQQTAQoAQwIbIwcLCQgHAwIBBhUIAgkK CwQWAgMBAh4BAheAAhkBFiEE3Vil58OMFCw3iBv13v+a5E8wTVMFAmkbaKgFCRZQah8ACgkQ 3v+a5E8wTVPFyg//UYANiuHfxxJET8D6p/vIV0xYcf1SXCG78M+5amqcE/4cCIJWyAT3A1nP zwyQIaIjUlGsXQtNgC1uVteCnMNJCjVQm0nLlJ9IVtXxzRg0QKjuSdZxuL5jrIon4xW9hTJR 94i2v3Fx5UWyP2TB6qZOcB0jgh0l01GHF9/DVJbmQlpvQB4Z1uNv09Q7En6EXi28TSv0Ffd1 p8vKqxwz7CMeAeZpn5i7s1QE/mQtdkyAmhuGD12tNbWzFamrDD1Kq3Em4TIFko0+k5+oQAAf JFaZc1c0D4GtXwvv4y+ssI0eZuOBXapUHeNNVf3JGuF6ZPLNPAe5gMQrmsJinEArVYRQCuDA BZakbKw9YJpGhnSVeCl2zSHcVgXuDs4J2ONxdsGynYv5cjPb4XTYPaE1CZH7Vy1tqma8eErG rcCyP1seloaC1UQcp8UDAyEaBjh3EqvTvgl+SppHz3im0gPJgR9km95BA8iGx9zqDuceATBc +A007+XxdFIsifMGlus0DKPmNAJaLkEEUMedBBxH3bwQ+z8tmWHisCZQJpUeGkwttD1LK/xn KRnu8AQpSJBB2oKAX1VtLRn8zLQdGmshxvsLUkKdrNE6NddhhfULqufNBqul0rrHGDdKdTLr cK5o2dsf9WlC4dHU2PiXP7RCjs1E5Ke0ycShDbDY5Zeep/yhNWLOwU0EVo1liQEQAL7ybY01 hvEg6pOh2G1Q+/ZWmyii8xhQ0sPjvEXWb5MWvIh7RxD9V5Zv144EtbIABtR0Tws7xDObe7bb r9nlSxZPur+JDsFmtywgkd778G0nDt3i7szqzcQPOcR03U7XPDTBJXDpNwVV+L8xvx5gsr2I bhiBQd9iX8kap5k3I6wfBSZm1ZgWGQb2mbiuqODPzfzNdKr/MCtxWEsWOAf/ClFcyr+c/Eh2 +gXgC5Keh2ZIb/xO+1CrTC3Sg9l9Hs5DG3CplCbVKWmaL1y7mdCiSt2b/dXE0K1nJR9ZyRGO lfwZw1aFPHT+Ay5p6rZGzadvu7ypBoTwp62R1o456js7CyIg81O61ojiDXLUGxZN/BEYNDC9 n9q1PyfMrD42LtvOP6ZRtBeSPEH5G/5pIt4FVit0Y4wTrpG7mjBM06kHd6V+pflB8GRxTq5M 7mzLFjILUl9/BJjzYBzesspbeoT/G7e5JqbiLWXFYOeg6XJ/iOCMLdd9RL46JXYJsBZnjZD8 Rn6KVO7pqs5J9K/nJDVyCdf8JnYD5Rq6OOmgP/zDnbSUSOZWrHQWQ8v3Ef665jpoXNq+Zyob pfbeihuWfBhprWUk0P/m+cnR2qeE4yXYl4qCcWAkRyGRu2zgIwXAOXCHTqy9TW10LGq1+04+ LmJHwpAABSLtr7Jgh4erWXi9mFoRABEBAAHCwXwEGAEKACYCGwwWIQTdWKXnw4wULDeIG/Xe /5rkTzBNUwUCaRto5wUJFlBqXgAKCRDe/5rkTzBNUw4/EAClG106SeHXiJ+ka6aeHysDNVgZ 8pUbB2f8dWI7kzD5AZ5kLENnsi1MzJRYBwtg/vVVorZh6tavUwcIvsao+TnV57gXAWr6sKIc xyipxRVEXmHts22I6vL1DirLAoOLAwWilkM+JzbVE3MMvC+cCVnMzzchrMYDTqn1mjCCwiIe u5oop+K/RgeHYPsraumyA9/kj8iazrLM+lORukCNM7+wlRClcY8TGX+VllANym9B6FMxsJ5z Q7JeeXIgyGlcBRME+m3g40HfIl+zM674gjv2Lk+KjS759KlX27mQfgnAPX4tnjLcmpSQJ77I Qg+Azi/Qloiw7L/WsmxEO5ureFgGIYDQQUeM1Qnk76K5Z3Nm8MLHtjw3Q7kXHrbYn7tfWh4B 7w5Lwh6NoF88AGpUrosARVvIAd93oo0B9p40Or4c5Jao1qqsmmCCD0dl7WTJCboYTa2OWd99 oxS7ujw2t1WMPD0cmriyeaFZnT5cjGbhkA+uQGuT0dMQJdLqW3HRwWxyiGU/jZUFjHGFmUrj qFAgP+x+ODm6/SYn0LE0VLbYuEGfyx5XcdNnSvww1NLUxSvuShcJMII0bSgP3+KJtFqrUx9z l+/NCGvn/wMy6NpYUpRSOmsqVv0N71LbtXnHRrJ42LzWiRW2I5IWsb1TfdMAyVToHPNaEb0i WiyqywZI5g== In-Reply-To: Content-Type: text/plain; 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Sampat wrote: > __sev_firmware_shutdown() reclaims and frees the TMR and the INIT_EX NV > area once the platform has been taken down. Move that into a helper so > that other paths which de-initialize the platform can reuse the same > path. > > No functional change intended. > > Suggested-by: Shantanu Sinha > Signed-off-by: Pratik R. Sampat Reviewed-by: Tom Lendacky > --- > v3..v4: > No change > --- > drivers/crypto/ccp/sev-dev.c | 55 ++++++++++++++++++++---------------- > 1 file changed, 30 insertions(+), 25 deletions(-) > > diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c > index f833cb7e4da3..1ed9e61a95cc 100644 > --- a/drivers/crypto/ccp/sev-dev.c > +++ b/drivers/crypto/ccp/sev-dev.c > @@ -1881,6 +1881,35 @@ static int __sev_platform_shutdown_locked(int *error) > return ret; > } > > +static void __sev_release_firmware_buffers(bool panic) > +{ > + if (sev_es_tmr) { > + /* > + * The TMR area was encrypted, flush it from the cache. > + * > + * If invoked during panic handling, local interrupts are > + * disabled and all CPUs are stopped, so wbinvd_on_all_cpus() > + * can't be used. In that case, wbinvd() is done on remote CPUs > + * via the NMI callback, and done for this CPU later during > + * SNP shutdown, so wbinvd_on_all_cpus() can be skipped. > + */ > + if (!panic) > + wbinvd_on_all_cpus(); > + > + __snp_free_firmware_pages(virt_to_page(sev_es_tmr), > + get_order(sev_es_tmr_size), > + true); > + sev_es_tmr = NULL; > + } > + > + if (sev_init_ex_buffer) { > + __snp_free_firmware_pages(virt_to_page(sev_init_ex_buffer), > + get_order(NV_LENGTH), > + true); > + sev_init_ex_buffer = NULL; > + } > +} > + > static int sev_get_platform_state(int *state, int *error) > { > struct sev_user_data_status data; > @@ -2906,31 +2935,7 @@ static void __sev_firmware_shutdown(struct sev_device *sev, bool panic) > > __sev_platform_shutdown_locked(&error); > > - if (sev_es_tmr) { > - /* > - * The TMR area was encrypted, flush it from the cache. > - * > - * If invoked during panic handling, local interrupts are > - * disabled and all CPUs are stopped, so wbinvd_on_all_cpus() > - * can't be used. In that case, wbinvd() is done on remote CPUs > - * via the NMI callback, and done for this CPU later during > - * SNP shutdown, so wbinvd_on_all_cpus() can be skipped. > - */ > - if (!panic) > - wbinvd_on_all_cpus(); > - > - __snp_free_firmware_pages(virt_to_page(sev_es_tmr), > - get_order(sev_es_tmr_size), > - true); > - sev_es_tmr = NULL; > - } > - > - if (sev_init_ex_buffer) { > - __snp_free_firmware_pages(virt_to_page(sev_init_ex_buffer), > - get_order(NV_LENGTH), > - true); > - sev_init_ex_buffer = NULL; > - } > + __sev_release_firmware_buffers(panic); > > __sev_snp_shutdown_locked(&error, panic); > }